Initial commit

.github/workflows/cr.yml

@@ -0,0 +1,27 @@
+name: Code Review
+
+permissions:
+  contents: read
+  pull-requests: write
+
+on:
+  workflow_dispatch:
+  pull_request:
+    types: [opened, reopened, synchronize]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: anc95/ChatGPT-CodeReview@main
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+          # Optional
+          OPENAI_API_ENDPOINT: https://api.openai.com/v1
+          MODEL: gpt-3.5-turbo-1106 # https://platform.openai.com/docs/models
+          PROMPT: "Please check if there are any bugs, confusions, or irregularities in the following code diff: "
+          top_p: 1 # https://platform.openai.com/docs/api-reference/chat/create#chat/create-top_p
+          temperature: 1 # https://platform.openai.com/docs/api-reference/chat/create#chat/create-temperature
+          max_tokens: 4096
+          MAX_PATCH_LENGTH: 10000 # if the patch/diff length is large than MAX_PATCH_LENGTH, will be ignored and won't review. By default, with no MAX_PATCH_LENGTH set, there is also no limit for the patch/diff length.

.gitignore

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+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+# Libraries should not include pubspec.lock, per https://dart.dev/guides/libraries/private-files#pubspeclock.
+/pubspec.lock
+**/doc/api/
+.dart_tool/
+.packages
+build/

.metadata

@@ -0,0 +1,42 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: "d211f42860350d914a5ad8102f9ec32764dc6d06"
+  channel: "stable"
+
+project_type: plugin
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: d211f42860350d914a5ad8102f9ec32764dc6d06
+      base_revision: d211f42860350d914a5ad8102f9ec32764dc6d06
+    - platform: android
+      create_revision: d211f42860350d914a5ad8102f9ec32764dc6d06
+      base_revision: d211f42860350d914a5ad8102f9ec32764dc6d06
+    - platform: ios
+      create_revision: d211f42860350d914a5ad8102f9ec32764dc6d06
+      base_revision: d211f42860350d914a5ad8102f9ec32764dc6d06
+    - platform: linux
+      create_revision: d211f42860350d914a5ad8102f9ec32764dc6d06
+      base_revision: d211f42860350d914a5ad8102f9ec32764dc6d06
+    - platform: macos
+      create_revision: d211f42860350d914a5ad8102f9ec32764dc6d06
+      base_revision: d211f42860350d914a5ad8102f9ec32764dc6d06
+    - platform: windows
+      create_revision: d211f42860350d914a5ad8102f9ec32764dc6d06
+      base_revision: d211f42860350d914a5ad8102f9ec32764dc6d06
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'

.vscode/c_cpp_properties.json

@@ -0,0 +1,21 @@
+{
+    "configurations": [
+        {
+            "name": "Win32",
+            "includePath": [
+                "${workspaceFolder}/**"
+            ],
+            "defines": [
+                "_DEBUG",
+                "UNICODE",
+                "_UNICODE"
+            ],
+            "windowsSdkVersion": "10.0.20348.0",
+            "compilerPath": "cl.exe",
+            "cStandard": "c17",
+            "cppStandard": "c++20",
+            "intelliSenseMode": "windows-msvc-x64"
+        }
+    ],
+    "version": 4
+}

.vscode/launch.json

@@ -0,0 +1,24 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "example",
+            "cwd": "example",
+            "request": "launch",
+            "type": "dart"
+        },
+        {
+            "name": "example_auto_connect",
+            "cwd": "example",
+            "request": "launch",
+            "type": "dart",
+            "args": [
+                "--dart-define",
+                "AUTO_CONNECT=true",
+            ]
+        }
+    ]
+}

.vscode/settings.json

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+{
+  "cSpell.words": [
+    "connnection",
+    "DSIMPLEBLE",
+    "Inspectable",
+    "microtask",
+    "modalias",
+    "NSUUID",
+    "pairable",
+    "rssi",
+    "simpleble",
+    "unawaited",
+    "Unpair",
+    "unwatch",
+    "uuidstr"
+  ],
+  "cmake.configureOnOpen": false,
+  "files.associations": {
+    "xstring": "cpp",
+    "chrono": "cpp",
+    "xlocale": "cpp",
+    "optional": "cpp",
+    "memory": "cpp",
+    "algorithm": "cpp",
+    "any": "cpp",
+    "array": "cpp",
+    "atomic": "cpp",
+    "bit": "cpp",
+    "cctype": "cpp",
+    "charconv": "cpp",
+    "clocale": "cpp",
+    "cmath": "cpp",
+    "compare": "cpp",
+    "concepts": "cpp",
+    "condition_variable": "cpp",
+    "coroutine": "cpp",
+    "cstddef": "cpp",
+    "cstdint": "cpp",
+    "cstdio": "cpp",
+    "cstdlib": "cpp",
+    "cstring": "cpp",
+    "ctime": "cpp",
+    "cwchar": "cpp",
+    "exception": "cpp",
+    "format": "cpp",
+    "forward_list": "cpp",
+    "functional": "cpp",
+    "initializer_list": "cpp",
+    "iomanip": "cpp",
+    "ios": "cpp",
+    "iosfwd": "cpp",
+    "iostream": "cpp",
+    "istream": "cpp",
+    "iterator": "cpp",
+    "limits": "cpp",
+    "list": "cpp",
+    "locale": "cpp",
+    "map": "cpp",
+    "mutex": "cpp",
+    "new": "cpp",
+    "ostream": "cpp",
+    "ratio": "cpp",
+    "set": "cpp",
+    "shared_mutex": "cpp",
+    "sstream": "cpp",
+    "stdexcept": "cpp",
+    "stop_token": "cpp",
+    "streambuf": "cpp",
+    "string": "cpp",
+    "system_error": "cpp",
+    "thread": "cpp",
+    "tuple": "cpp",
+    "type_traits": "cpp",
+    "typeinfo": "cpp",
+    "unordered_map": "cpp",
+    "utility": "cpp",
+    "variant": "cpp",
+    "vector": "cpp",
+    "xfacet": "cpp",
+    "xhash": "cpp",
+    "xiosbase": "cpp",
+    "xlocbuf": "cpp",
+    "xlocinfo": "cpp",
+    "xlocmes": "cpp",
+    "xlocmon": "cpp",
+    "xlocnum": "cpp",
+    "xloctime": "cpp",
+    "xmemory": "cpp",
+    "xtr1common": "cpp",
+    "xtree": "cpp",
+    "xutility": "cpp",
+    "deque": "cpp",
+    "fstream": "cpp",
+    "unordered_set": "cpp",
+    "complex": "cpp",
+    "csignal": "cpp",
+    "cstdarg": "cpp",
+    "filesystem": "cpp",
+    "ranges": "cpp",
+    "span": "cpp",
+    "stack": "cpp",
+    "typeindex": "cpp",
+    "future": "cpp",
+    "regex": "cpp"
+  }
+}

CHANGELOG.md

@@ -0,0 +1,3 @@
+## 0.8.0
+
+* Initial release.

LICENSE

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+BSD 3-Clause License
+
+Copyright (c) 2024, Navideck Labs OÜ
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+* Neither the name of the copyright holder nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+Copyright (c) 2020, Woodemi Co,Ltd.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

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+# Universal Ble
+
+A cross-platform (Android/iOS/MacOS/Windows/Linux/Web) BluetoothLE plugin for Flutter
+
+# Usage
+
+- [Receive BLE availability changes](#receive-ble-availability-changes)
+- [Scan BLE peripheral](#scan-ble-peripheral)
+- [Connect BLE peripheral](#connect-ble-peripheral)
+- [Discover services of BLE peripheral](#discover-services-of-ble-peripheral)
+- [Transfer data between BLE central & peripheral](#transfer-data-between-ble-central--peripheral)
+- [Pair BLE peripheral](#pair-ble-central--peripheral)
+
+| API                  | Android | iOS | macOS | Windows (beta) | Linux (beta) | Web |
+| :------------------- | :-----: | :-: | :---: | :-----: | :---: | :-: |
+| startScan/stopScan   |   ✔️    | ✔️  |  ✔️   |   ✔️    |  ✔️   | ✔️  |
+| connect/disconnect   |   ✔️    | ✔️  |  ✔️   |   ✔️    |  ✔️   | ✔️  |
+| getConnectedDevices  |   ✔️    | ✔️  |  ✔️   |   ✔️    |  ✔️   | ❌  |
+| discoverServices     |   ✔️    | ✔️  |  ✔️   |   ✔️    |  ✔️   | ✔️  |
+| readValue            |   ✔️    | ✔️  |  ✔️   |   ✔️    |  ✔️   | ✔️  |
+| writeValue           |   ✔️    | ✔️  |  ✔️   |   ✔️    |  ✔️   | ✔️  |
+| setNotifiable        |   ✔️    | ✔️  |  ✔️   |   ✔️    |  ✔️   | ✔️  |
+| pair/unPair          |   ✔️    | ❌  |  ❌   |   ✔️    |  ✔️   | ❌  |
+| onPairStateChange    |   ✔️    | ❌  |  ❌   |   ✔️    |  ✔️   | ❌  |
+| enableBluetooth      |   ✔️    | ❌  |  ❌   |   ✔️    |  ✔️   | ❌  |
+| onAvailabilityChange |   ✔️    | ✔️  |  ✔️   |   ✔️    |  ✔️   | ✔️  |
+| requestMtu           |   ✔️    | ✔️  |  ✔️   |   ✔️    |  ❌   | ❌  |
+
+## Getting Started
+
+### Android
+
+You need to add the following permissions to your AndroidManifest.xml file:
+
+```xml
+<uses-permission android:name="android.permission.BLUETOOTH_SCAN" android:usesPermissionFlags="neverForLocation" />
+<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
+<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" android:maxSdkVersion="30" />
+<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" android:maxSdkVersion="30" />
+```
+
+If you use `BLUETOOTH_SCAN` to determine location, modify your AndroidManifest.xml file to include the following entry:
+
+```xml
+ <uses-permission android:name="android.permission.BLUETOOTH_SCAN" tools:remove="android:usesPermissionFlags" tools:targetApi="s" />
+```
+
+If you use location services in your app, remove `android:maxSdkVersion="30"` from the location permission tags
+
+### iOS / MacOS
+
+Add `NSBluetoothPeripheralUsageDescription` and `NSBluetoothAlwaysUsageDescription` in Info.plist of your iOS and MacOS app,
+
+Add `Bluetooth` capability to MacOS app from Xcode
+
+## Scan BLE peripheral
+
+Android/iOS/macOS/Windows/Linux
+
+```dart
+UniversalBle.onScanResult = (scanResult) {
+  // Handle scan result
+}
+
+UniversalBle.startScan();
+
+// To scan on web, you can optionally add filters, and `optionalServices` required to discover those services after connection, for more info check [this](https://developer.mozilla.org/en-US/docs/Web/API/Bluetooth/requestDevice)
+UniversalBle.startScan(
+  webRequestOptions: WebRequestOptionsBuilder.acceptAllDevices(
+    optionalServices: [
+      "SERVICE_UUID",
+    ],
+  )
+);
+
+UniversalBle.stopScan();
+```
+
+## Connect to BLE peripheral
+
+Connect to `deviceId`, received from `UniversalBle.onScanResult`
+
+```dart
+UniversalBle.onConnectionChanged = (String deviceId, BleConnectionState state) {
+  print('onConnectionChanged $deviceId, $state');
+}
+
+UniversalBle.connect(deviceId);
+
+UniversalBle.disconnect(deviceId);
+```
+
+Get connected devices ( These devices might be connected through another applications, connect using `connect` method to use in your application ), use `withServices` to filter devices
+
+```dart
+await UniversalBle.getConnectedDevices(withServices: []);
+```
+
+## Discover services of BLE peripheral
+
+Discover services of `deviceId`
+
+```dart
+UniversalBle.discoverServices(deviceId);
+```
+
+## Transfer data between BLE central & peripheral
+
+- Pull data from peripheral of `deviceId`
+
+```dart
+UniversalBle.readValue(deviceId, serviceId, characteristicId);
+```
+
+- Send data to peripheral of `deviceId`
+
+```dart
+UniversalBle.writeValue(deviceId, serviceId, characteristicId, value);
+```
+
+- Receive data from peripheral of `deviceId`
+
+```dart
+UniversalBle.onValueChanged = (String deviceId, String characteristicId, Uint8List value) {
+  print('onValueChanged $deviceId, $characteristicId, ${hex.encode(value)}');
+}
+
+// To get characteristic updates in `onValueChanged`
+UniversalBle.setNotifiable(deviceId, serviceId, characteristicId, BleInputProperty.notification);
+
+// To stop updates
+UniversalBle.setNotifiable(deviceId, serviceId, characteristicId, BleInputProperty.disabled);
+```
+
+## Pair BLE central & peripheral
+
+- Pair apis
+
+```dart
+UniversalBle.onPairStateChange = (String deviceId, bool isPaired, String? error) {
+  // Handle Pairing state change
+}
+
+// Get result in [onPairStateChange]
+UniversalBle.pair(deviceId);
+
+UniversalBle.unPair(deviceId);
+
+UniversalBle.isPaired(deviceId);
+```
+
+## Enable bluetooth programatically
+
+```dart
+UniversalBle.enableBluetooth();
+```
+
+## Receive BLE availability changes
+
+```dart
+UniversalBle.onAvailabilityChange = (state) {
+  // Handle ble availability states
+  // e.g. poweredOff or poweredOn,
+};
+```
+
+## To set your own implementation of UniversalBle for any specific platform
+
+```dart
+// Create a class which extends `UniversalBlePlatform`
+class UniversalBleMock extends UniversalBlePlatform {
+  // Implement all methods
+}
+
+UniversalBle.setInstance(UniversalBleMock());
+```

analysis_options.yaml

@@ -0,0 +1,4 @@
+include: package:flutter_lints/flutter.yaml
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options

android/.gitignore

@@ -0,0 +1,9 @@
+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures
+.cxx

android/build.gradle

@@ -0,0 +1,68 @@
+group 'com.navideck.universal_ble'
+version '1.0-SNAPSHOT'
+
+buildscript {
+    ext.kotlin_version = '1.7.10'
+    repositories {
+        google()
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:7.3.0'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+
+android {
+    if (project.android.hasProperty("namespace")) {
+        namespace 'com.navideck.universal_ble'
+    }
+
+    compileSdkVersion 34
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
+    sourceSets {
+        main.java.srcDirs += 'src/main/kotlin'
+        test.java.srcDirs += 'src/test/kotlin'
+    }
+
+    defaultConfig {
+        minSdkVersion 21
+    }
+
+    dependencies {
+        testImplementation 'org.jetbrains.kotlin:kotlin-test'
+        testImplementation 'org.mockito:mockito-core:5.0.0'
+    }
+
+    testOptions {
+        unitTests.all {
+            useJUnitPlatform()
+
+            testLogging {
+               events "passed", "skipped", "failed", "standardOut", "standardError"
+               outputs.upToDateWhen {false}
+               showStandardStreams = true
+            }
+        }
+    }
+}

android/settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'universal_ble'

android/src/main/AndroidManifest.xml

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+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+  xmlns:tools="http://schemas.android.com/tools"
+  package="com.navideck.universal_ble">
+   <uses-permission
+       android:name="android.permission.BLUETOOTH"
+       android:maxSdkVersion="30" />
+   <uses-permission
+       android:name="android.permission.BLUETOOTH_ADMIN"
+       android:maxSdkVersion="30" />   
+</manifest>

android/src/main/kotlin/com/navideck/universal_ble/UniversalBle.g.kt

@@ -0,0 +1,598 @@
+// Autogenerated from Pigeon (v13.0.0), do not edit directly.
+// See also: https://pub.dev/packages/pigeon
+
+package com.navideck.universal_ble
+
+import android.util.Log
+import io.flutter.plugin.common.BasicMessageChannel
+import io.flutter.plugin.common.BinaryMessenger
+import io.flutter.plugin.common.MessageCodec
+import io.flutter.plugin.common.StandardMessageCodec
+import java.io.ByteArrayOutputStream
+import java.nio.ByteBuffer
+
+private fun wrapResult(result: Any?): List<Any?> {
+  return listOf(result)
+}
+
+private fun wrapError(exception: Throwable): List<Any?> {
+  if (exception is FlutterError) {
+    return listOf(
+      exception.code,
+      exception.message,
+      exception.details
+    )
+  } else {
+    return listOf(
+      exception.javaClass.simpleName,
+      exception.toString(),
+      "Cause: " + exception.cause + ", Stacktrace: " + Log.getStackTraceString(exception)
+    )
+  }
+}
+
+/**
+ * Error class for passing custom error details to Flutter via a thrown PlatformException.
+ * @property code The error code.
+ * @property message The error message.
+ * @property details The error details. Must be a datatype supported by the api codec.
+ */
+class FlutterError (
+  val code: String,
+  override val message: String? = null,
+  val details: Any? = null
+) : Throwable()
+
+/** Generated class from Pigeon that represents data sent in messages. */
+data class UniversalBleScanResult (
+  val deviceId: String,
+  val name: String? = null,
+  val isPaired: Boolean? = null,
+  val rssi: Long? = null,
+  val manufacturerData: ByteArray? = null,
+  val manufacturerDataHead: ByteArray? = null
+
+) {
+  companion object {
+    @Suppress("UNCHECKED_CAST")
+    fun fromList(list: List<Any?>): UniversalBleScanResult {
+      val deviceId = list[0] as String
+      val name = list[1] as String?
+      val isPaired = list[2] as Boolean?
+      val rssi = list[3].let { if (it is Int) it.toLong() else it as Long? }
+      val manufacturerData = list[4] as ByteArray?
+      val manufacturerDataHead = list[5] as ByteArray?
+      return UniversalBleScanResult(deviceId, name, isPaired, rssi, manufacturerData, manufacturerDataHead)
+    }
+  }
+  fun toList(): List<Any?> {
+    return listOf<Any?>(
+      deviceId,
+      name,
+      isPaired,
+      rssi,
+      manufacturerData,
+      manufacturerDataHead,
+    )
+  }
+}
+
+/** Generated class from Pigeon that represents data sent in messages. */
+data class UniversalBleService (
+  val uuid: String,
+  val characteristics: List<UniversalBleCharacteristic?>? = null
+
+) {
+  companion object {
+    @Suppress("UNCHECKED_CAST")
+    fun fromList(list: List<Any?>): UniversalBleService {
+      val uuid = list[0] as String
+      val characteristics = list[1] as List<UniversalBleCharacteristic?>?
+      return UniversalBleService(uuid, characteristics)
+    }
+  }
+  fun toList(): List<Any?> {
+    return listOf<Any?>(
+      uuid,
+      characteristics,
+    )
+  }
+}
+
+/** Generated class from Pigeon that represents data sent in messages. */
+data class UniversalBleCharacteristic (
+  val uuid: String,
+  val properties: List<Long?>
+
+) {
+  companion object {
+    @Suppress("UNCHECKED_CAST")
+    fun fromList(list: List<Any?>): UniversalBleCharacteristic {
+      val uuid = list[0] as String
+      val properties = list[1] as List<Long?>
+      return UniversalBleCharacteristic(uuid, properties)
+    }
+  }
+  fun toList(): List<Any?> {
+    return listOf<Any?>(
+      uuid,
+      properties,
+    )
+  }
+}
+
+@Suppress("UNCHECKED_CAST")
+private object UniversalBlePlatformChannelCodec : StandardMessageCodec() {
+  override fun readValueOfType(type: Byte, buffer: ByteBuffer): Any? {
+    return when (type) {
+      128.toByte() -> {
+        return (readValue(buffer) as? List<Any?>)?.let {
+          UniversalBleCharacteristic.fromList(it)
+        }
+      }
+      129.toByte() -> {
+        return (readValue(buffer) as? List<Any?>)?.let {
+          UniversalBleScanResult.fromList(it)
+        }
+      }
+      130.toByte() -> {
+        return (readValue(buffer) as? List<Any?>)?.let {
+          UniversalBleService.fromList(it)
+        }
+      }
+      else -> super.readValueOfType(type, buffer)
+    }
+  }
+  override fun writeValue(stream: ByteArrayOutputStream, value: Any?)   {
+    when (value) {
+      is UniversalBleCharacteristic -> {
+        stream.write(128)
+        writeValue(stream, value.toList())
+      }
+      is UniversalBleScanResult -> {
+        stream.write(129)
+        writeValue(stream, value.toList())
+      }
+      is UniversalBleService -> {
+        stream.write(130)
+        writeValue(stream, value.toList())
+      }
+      else -> super.writeValue(stream, value)
+    }
+  }
+}
+
+/**
+ * Flutter -> Native
+ *
+ * Generated interface from Pigeon that represents a handler of messages from Flutter.
+ */
+interface UniversalBlePlatformChannel {
+  fun getBluetoothAvailabilityState(callback: (Result<Long>) -> Unit)
+  fun enableBluetooth(callback: (Result<Boolean>) -> Unit)
+  fun startScan()
+  fun stopScan()
+  fun connect(deviceId: String)
+  fun disconnect(deviceId: String)
+  fun setNotifiable(deviceId: String, service: String, characteristic: String, bleInputProperty: Long)
+  fun discoverServices(deviceId: String, callback: (Result<List<UniversalBleService>>) -> Unit)
+  fun readValue(deviceId: String, service: String, characteristic: String, callback: (Result<ByteArray>) -> Unit)
+  fun requestMtu(deviceId: String, expectedMtu: Long, callback: (Result<Long>) -> Unit)
+  fun writeValue(deviceId: String, service: String, characteristic: String, value: ByteArray, bleOutputProperty: Long, callback: (Result<Unit>) -> Unit)
+  fun isPaired(deviceId: String, callback: (Result<Boolean>) -> Unit)
+  fun pair(deviceId: String)
+  fun unPair(deviceId: String)
+  fun getConnectedDevices(withServices: List<String>, callback: (Result<List<UniversalBleScanResult>>) -> Unit)
+
+  companion object {
+    /** The codec used by UniversalBlePlatformChannel. */
+    val codec: MessageCodec<Any?> by lazy {
+      UniversalBlePlatformChannelCodec
+    }
+    /** Sets up an instance of `UniversalBlePlatformChannel` to handle messages through the `binaryMessenger`. */
+    @Suppress("UNCHECKED_CAST")
+    fun setUp(binaryMessenger: BinaryMessenger, api: UniversalBlePlatformChannel?) {
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.getBluetoothAvailabilityState", codec)
+        if (api != null) {
+          channel.setMessageHandler { _, reply ->
+            api.getBluetoothAvailabilityState() { result: Result<Long> ->
+              val error = result.exceptionOrNull()
+              if (error != null) {
+                reply.reply(wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(wrapResult(data))
+              }
+            }
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.enableBluetooth", codec)
+        if (api != null) {
+          channel.setMessageHandler { _, reply ->
+            api.enableBluetooth() { result: Result<Boolean> ->
+              val error = result.exceptionOrNull()
+              if (error != null) {
+                reply.reply(wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(wrapResult(data))
+              }
+            }
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.startScan", codec)
+        if (api != null) {
+          channel.setMessageHandler { _, reply ->
+            var wrapped: List<Any?>
+            try {
+              api.startScan()
+              wrapped = listOf<Any?>(null)
+            } catch (exception: Throwable) {
+              wrapped = wrapError(exception)
+            }
+            reply.reply(wrapped)
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.stopScan", codec)
+        if (api != null) {
+          channel.setMessageHandler { _, reply ->
+            var wrapped: List<Any?>
+            try {
+              api.stopScan()
+              wrapped = listOf<Any?>(null)
+            } catch (exception: Throwable) {
+              wrapped = wrapError(exception)
+            }
+            reply.reply(wrapped)
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.connect", codec)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val deviceIdArg = args[0] as String
+            var wrapped: List<Any?>
+            try {
+              api.connect(deviceIdArg)
+              wrapped = listOf<Any?>(null)
+            } catch (exception: Throwable) {
+              wrapped = wrapError(exception)
+            }
+            reply.reply(wrapped)
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.disconnect", codec)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val deviceIdArg = args[0] as String
+            var wrapped: List<Any?>
+            try {
+              api.disconnect(deviceIdArg)
+              wrapped = listOf<Any?>(null)
+            } catch (exception: Throwable) {
+              wrapped = wrapError(exception)
+            }
+            reply.reply(wrapped)
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.setNotifiable", codec)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val deviceIdArg = args[0] as String
+            val serviceArg = args[1] as String
+            val characteristicArg = args[2] as String
+            val bleInputPropertyArg = args[3].let { if (it is Int) it.toLong() else it as Long }
+            var wrapped: List<Any?>
+            try {
+              api.setNotifiable(deviceIdArg, serviceArg, characteristicArg, bleInputPropertyArg)
+              wrapped = listOf<Any?>(null)
+            } catch (exception: Throwable) {
+              wrapped = wrapError(exception)
+            }
+            reply.reply(wrapped)
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.discoverServices", codec)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val deviceIdArg = args[0] as String
+            api.discoverServices(deviceIdArg) { result: Result<List<UniversalBleService>> ->
+              val error = result.exceptionOrNull()
+              if (error != null) {
+                reply.reply(wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(wrapResult(data))
+              }
+            }
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.readValue", codec)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val deviceIdArg = args[0] as String
+            val serviceArg = args[1] as String
+            val characteristicArg = args[2] as String
+            api.readValue(deviceIdArg, serviceArg, characteristicArg) { result: Result<ByteArray> ->
+              val error = result.exceptionOrNull()
+              if (error != null) {
+                reply.reply(wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(wrapResult(data))
+              }
+            }
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.requestMtu", codec)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val deviceIdArg = args[0] as String
+            val expectedMtuArg = args[1].let { if (it is Int) it.toLong() else it as Long }
+            api.requestMtu(deviceIdArg, expectedMtuArg) { result: Result<Long> ->
+              val error = result.exceptionOrNull()
+              if (error != null) {
+                reply.reply(wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(wrapResult(data))
+              }
+            }
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.writeValue", codec)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val deviceIdArg = args[0] as String
+            val serviceArg = args[1] as String
+            val characteristicArg = args[2] as String
+            val valueArg = args[3] as ByteArray
+            val bleOutputPropertyArg = args[4].let { if (it is Int) it.toLong() else it as Long }
+            api.writeValue(deviceIdArg, serviceArg, characteristicArg, valueArg, bleOutputPropertyArg) { result: Result<Unit> ->
+              val error = result.exceptionOrNull()
+              if (error != null) {
+                reply.reply(wrapError(error))
+              } else {
+                reply.reply(wrapResult(null))
+              }
+            }
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.isPaired", codec)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val deviceIdArg = args[0] as String
+            api.isPaired(deviceIdArg) { result: Result<Boolean> ->
+              val error = result.exceptionOrNull()
+              if (error != null) {
+                reply.reply(wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(wrapResult(data))
+              }
+            }
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.pair", codec)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val deviceIdArg = args[0] as String
+            var wrapped: List<Any?>
+            try {
+              api.pair(deviceIdArg)
+              wrapped = listOf<Any?>(null)
+            } catch (exception: Throwable) {
+              wrapped = wrapError(exception)
+            }
+            reply.reply(wrapped)
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.unPair", codec)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val deviceIdArg = args[0] as String
+            var wrapped: List<Any?>
+            try {
+              api.unPair(deviceIdArg)
+              wrapped = listOf<Any?>(null)
+            } catch (exception: Throwable) {
+              wrapped = wrapError(exception)
+            }
+            reply.reply(wrapped)
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.getConnectedDevices", codec)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val withServicesArg = args[0] as List<String>
+            api.getConnectedDevices(withServicesArg) { result: Result<List<UniversalBleScanResult>> ->
+              val error = result.exceptionOrNull()
+              if (error != null) {
+                reply.reply(wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(wrapResult(data))
+              }
+            }
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+    }
+  }
+}
+@Suppress("UNCHECKED_CAST")
+private object UniversalBleCallbackChannelCodec : StandardMessageCodec() {
+  override fun readValueOfType(type: Byte, buffer: ByteBuffer): Any? {
+    return when (type) {
+      128.toByte() -> {
+        return (readValue(buffer) as? List<Any?>)?.let {
+          UniversalBleScanResult.fromList(it)
+        }
+      }
+      else -> super.readValueOfType(type, buffer)
+    }
+  }
+  override fun writeValue(stream: ByteArrayOutputStream, value: Any?)   {
+    when (value) {
+      is UniversalBleScanResult -> {
+        stream.write(128)
+        writeValue(stream, value.toList())
+      }
+      else -> super.writeValue(stream, value)
+    }
+  }
+}
+
+/**
+ * Native -> Flutter
+ *
+ * Generated class from Pigeon that represents Flutter messages that can be called from Kotlin.
+ */
+@Suppress("UNCHECKED_CAST")
+class UniversalBleCallbackChannel(private val binaryMessenger: BinaryMessenger) {
+  companion object {
+    /** The codec used by UniversalBleCallbackChannel. */
+    val codec: MessageCodec<Any?> by lazy {
+      UniversalBleCallbackChannelCodec
+    }
+  }
+  fun onAvailabilityChanged(stateArg: Long, callback: (Result<Unit>) -> Unit) {
+    val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBleCallbackChannel.onAvailabilityChanged", codec)
+    channel.send(listOf(stateArg)) {
+      if (it is List<*>) {
+        if (it.size > 1) {
+          callback(Result.failure(FlutterError(it[0] as String, it[1] as String, it[2] as String?)));
+        } else {
+          callback(Result.success(Unit));
+        }
+      } else {
+        callback(Result.failure(FlutterError("channel-error",  "Unable to establish connection on channel.", "")));
+      } 
+    }
+  }
+  fun onPairStateChange(deviceIdArg: String, isPairedArg: Boolean, errorArg: String?, callback: (Result<Unit>) -> Unit) {
+    val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBleCallbackChannel.onPairStateChange", codec)
+    channel.send(listOf(deviceIdArg, isPairedArg, errorArg)) {
+      if (it is List<*>) {
+        if (it.size > 1) {
+          callback(Result.failure(FlutterError(it[0] as String, it[1] as String, it[2] as String?)));
+        } else {
+          callback(Result.success(Unit));
+        }
+      } else {
+        callback(Result.failure(FlutterError("channel-error",  "Unable to establish connection on channel.", "")));
+      } 
+    }
+  }
+  fun onScanResult(resultArg: UniversalBleScanResult, callback: (Result<Unit>) -> Unit) {
+    val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBleCallbackChannel.onScanResult", codec)
+    channel.send(listOf(resultArg)) {
+      if (it is List<*>) {
+        if (it.size > 1) {
+          callback(Result.failure(FlutterError(it[0] as String, it[1] as String, it[2] as String?)));
+        } else {
+          callback(Result.success(Unit));
+        }
+      } else {
+        callback(Result.failure(FlutterError("channel-error",  "Unable to establish connection on channel.", "")));
+      } 
+    }
+  }
+  fun onValueChanged(deviceIdArg: String, characteristicIdArg: String, valueArg: ByteArray, callback: (Result<Unit>) -> Unit) {
+    val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBleCallbackChannel.onValueChanged", codec)
+    channel.send(listOf(deviceIdArg, characteristicIdArg, valueArg)) {
+      if (it is List<*>) {
+        if (it.size > 1) {
+          callback(Result.failure(FlutterError(it[0] as String, it[1] as String, it[2] as String?)));
+        } else {
+          callback(Result.success(Unit));
+        }
+      } else {
+        callback(Result.failure(FlutterError("channel-error",  "Unable to establish connection on channel.", "")));
+      } 
+    }
+  }
+  fun onConnectionChanged(deviceIdArg: String, stateArg: Long, callback: (Result<Unit>) -> Unit) {
+    val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.universal_ble.UniversalBleCallbackChannel.onConnectionChanged", codec)
+    channel.send(listOf(deviceIdArg, stateArg)) {
+      if (it is List<*>) {
+        if (it.size > 1) {
+          callback(Result.failure(FlutterError(it[0] as String, it[1] as String, it[2] as String?)));
+        } else {
+          callback(Result.success(Unit));
+        }
+      } else {
+        callback(Result.failure(FlutterError("channel-error",  "Unable to establish connection on channel.", "")));
+      } 
+    }
+  }
+}

android/src/main/kotlin/com/navideck/universal_ble/UniversalBleHelper.kt

@@ -0,0 +1,212 @@
+package com.navideck.universal_ble
+
+import android.annotation.SuppressLint
+import android.bluetooth.BluetoothAdapter
+import android.bluetooth.BluetoothDevice
+import android.bluetooth.BluetoothGatt
+import android.bluetooth.BluetoothGattCharacteristic
+import android.bluetooth.BluetoothGattDescriptor
+import android.bluetooth.BluetoothStatusCodes
+import android.bluetooth.le.ScanCallback.SCAN_FAILED_ALREADY_STARTED
+import android.bluetooth.le.ScanCallback.SCAN_FAILED_APPLICATION_REGISTRATION_FAILED
+import android.bluetooth.le.ScanCallback.SCAN_FAILED_FEATURE_UNSUPPORTED
+import android.bluetooth.le.ScanCallback.SCAN_FAILED_INTERNAL_ERROR
+import android.bluetooth.le.ScanCallback.SCAN_FAILED_OUT_OF_HARDWARE_RESOURCES
+import android.bluetooth.le.ScanCallback.SCAN_FAILED_SCANNING_TOO_FREQUENTLY
+import android.bluetooth.le.ScanResult
+import android.util.Log
+import java.nio.ByteBuffer
+import java.nio.ByteOrder
+import java.util.UUID
+
+private const val TAG = "UniversalBlePlugin"
+
+val knownGatts = mutableListOf<BluetoothGatt>()
+
+
+enum class BleConnectionState(val value: Long) {
+    Connected(0),
+    Disconnected(1)
+}
+
+enum class AvailabilityState(val value: Long) {
+    Unknown(0),
+    Resetting(1),
+    Unsupported(2),
+    Unauthorized(3),
+    PoweredOff(4),
+    PoweredOn(5);
+}
+
+enum class BleInputProperty(val value: Long) {
+    Disabled(0),
+    Notification(1),
+    Indication(2);
+}
+
+enum class BleOutputProperty(val value: Long) {
+    withResponse(0),
+    withoutResponse(1);
+}
+
+
+enum class CharacteristicProperty(val value: Long) {
+    Broadcast(0),
+    Read(1),
+    WriteWithoutResponse(2),
+    Write(3),
+    Notify(4),
+    Indicate(5),
+    AuthenticatedSignedWrites(6),
+    ExtendedProperties(7)
+}
+
+fun String.toBluetoothGatt(): BluetoothGatt {
+    return knownGatts.find { it.device.address == this }
+        ?: throw FlutterError("IllegalArgument", "Unknown deviceId: $this", null)
+}
+
+fun Int.toAvailabilityState(): Long {
+    return when (this) {
+        BluetoothAdapter.STATE_OFF -> AvailabilityState.PoweredOff.value
+        BluetoothAdapter.STATE_ON -> AvailabilityState.PoweredOn.value
+        BluetoothAdapter.STATE_TURNING_ON -> AvailabilityState.Resetting.value
+        BluetoothAdapter.STATE_TURNING_OFF -> AvailabilityState.Resetting.value
+        else -> AvailabilityState.Unknown.value
+    }
+}
+
+fun Int.parseScanErrorMessage(): String {
+    return when (this) {
+        SCAN_FAILED_ALREADY_STARTED -> "SCAN_FAILED_ALREADY_STARTED"
+        SCAN_FAILED_APPLICATION_REGISTRATION_FAILED -> "SCAN_FAILED_APPLICATION_REGISTRATION_FAILED"
+        SCAN_FAILED_FEATURE_UNSUPPORTED -> "SCAN_FAILED_FEATURE_UNSUPPORTED"
+        SCAN_FAILED_INTERNAL_ERROR -> "SCAN_FAILED_INTERNAL_ERROR"
+        SCAN_FAILED_OUT_OF_HARDWARE_RESOURCES -> "SCAN_FAILED_OUT_OF_HARDWARE_RESOURCES"
+        SCAN_FAILED_SCANNING_TOO_FREQUENTLY -> "SCAN_FAILED_SCANNING_TOO_FREQUENTLY"
+        else -> "ErrorCode: $this"
+    }
+}
+
+fun Int.parseBluetoothStatusCodeError(): String? {
+    if (this == BluetoothStatusCodes.SUCCESS) return null
+    return when (this) {
+        BluetoothStatusCodes.ERROR_BLUETOOTH_NOT_ENABLED -> "ERROR_BLUETOOTH_NOT_ENABLED"
+        BluetoothStatusCodes.ERROR_BLUETOOTH_NOT_ALLOWED -> "ERROR_BLUETOOTH_NOT_ALLOWED"
+        BluetoothStatusCodes.ERROR_DEVICE_NOT_BONDED -> "ERROR_DEVICE_NOT_BONDED"
+        BluetoothStatusCodes.ERROR_GATT_WRITE_NOT_ALLOWED -> "ERROR_GATT_WRITE_NOT_ALLOWED"
+        BluetoothStatusCodes.ERROR_GATT_WRITE_REQUEST_BUSY -> "ERROR_GATT_WRITE_REQUEST_BUSY"
+        BluetoothStatusCodes.ERROR_MISSING_BLUETOOTH_CONNECT_PERMISSION -> "ERROR_MISSING_BLUETOOTH_CONNECT_PERMISSION"
+        BluetoothStatusCodes.ERROR_PROFILE_SERVICE_NOT_BOUND -> "ERROR_PROFILE_SERVICE_NOT_BOUND"
+        BluetoothStatusCodes.ERROR_UNKNOWN -> "ERROR_UNKNOWN"
+        BluetoothStatusCodes.FEATURE_NOT_CONFIGURED -> "FEATURE_NOT_CONFIGURED"
+        BluetoothStatusCodes.FEATURE_NOT_SUPPORTED -> "FEATURE_NOT_SUPPORTED"
+        BluetoothStatusCodes.FEATURE_SUPPORTED -> "FEATURE_SUPPORTED"
+        else -> "ErrorCode: $this"
+    }
+}
+
+val ScanResult.manufacturerDataHead: ByteArray?
+    get() {
+        val sparseArray = scanRecord?.manufacturerSpecificData ?: return null
+        if (sparseArray.size() == 0) return null
+
+        return sparseArray.keyAt(0).toShort().toByteArray() + sparseArray.valueAt(0)
+    }
+
+fun BluetoothGatt.getCharacteristic(
+    service: String,
+    characteristic: String,
+): BluetoothGattCharacteristic? =
+    getService(UUID.fromString(service)).getCharacteristic(UUID.fromString(characteristic))
+
+
+@SuppressLint("MissingPermission")
+fun BluetoothGatt.setNotifiable(
+    gattCharacteristic: BluetoothGattCharacteristic,
+    bleInputProperty: Long,
+) {
+    val descClientCharConfirmation =
+        UUID.fromString("00002902-0000-1000-8000-00805f9b34fb")
+    val descriptor = gattCharacteristic.getDescriptor(descClientCharConfirmation)
+    val bleInputPropertyEnum: BleInputProperty =
+        BleInputProperty.values().first { it.value == bleInputProperty }
+    val (value, enable) = when (bleInputPropertyEnum) {
+        BleInputProperty.Notification -> BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE to true
+        BleInputProperty.Indication -> BluetoothGattDescriptor.ENABLE_INDICATION_VALUE to true
+        else -> BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE to false
+    }
+    descriptor.value = value
+    setCharacteristicNotification(descriptor.characteristic, enable) && writeDescriptor(descriptor)
+}
+
+fun BluetoothDevice.removeBond() {
+    try {
+        javaClass.getMethod("removeBond").invoke(this)
+    } catch (e: Exception) {
+        Log.e(TAG, "Removing bond has been failed. ${e.message}")
+    }
+}
+
+
+fun BluetoothGattCharacteristic.getPropertiesList(): ArrayList<Long> {
+    val propertiesList = arrayListOf<Long>()
+    if (properties and BluetoothGattCharacteristic.PROPERTY_BROADCAST > 0) {
+        propertiesList.add(CharacteristicProperty.Broadcast.value)
+    }
+    if (properties and BluetoothGattCharacteristic.PROPERTY_READ > 0) {
+        propertiesList.add(CharacteristicProperty.Read.value)
+    }
+    if (properties and BluetoothGattCharacteristic.PROPERTY_WRITE_NO_RESPONSE > 0) {
+        propertiesList.add(CharacteristicProperty.WriteWithoutResponse.value)
+    }
+    if (properties and BluetoothGattCharacteristic.PROPERTY_WRITE > 0) {
+        propertiesList.add(CharacteristicProperty.Write.value)
+    }
+    if (properties and BluetoothGattCharacteristic.PROPERTY_NOTIFY > 0) {
+        propertiesList.add(CharacteristicProperty.Notify.value)
+    }
+    if (properties and BluetoothGattCharacteristic.PROPERTY_INDICATE > 0) {
+        propertiesList.add(CharacteristicProperty.Indicate.value)
+    }
+    if (properties and BluetoothGattCharacteristic.PROPERTY_SIGNED_WRITE > 0) {
+        propertiesList.add(CharacteristicProperty.AuthenticatedSignedWrites.value)
+    }
+    if (properties and BluetoothGattCharacteristic.PROPERTY_EXTENDED_PROPS > 0) {
+        propertiesList.add(CharacteristicProperty.ExtendedProperties.value)
+    }
+    return propertiesList
+}
+
+
+fun Short.toByteArray(byteOrder: ByteOrder = ByteOrder.LITTLE_ENDIAN): ByteArray =
+    ByteBuffer.allocate(2 /*Short.SIZE_BYTES*/).order(byteOrder).putShort(this).array()
+
+// Errors
+fun unknownCharacteristicError(char: String) =
+    FlutterError("IllegalArgument", "Unknown error", null)
+
+// Future result classes
+class BleCharacteristicFuture(
+    val deviceId: String,
+    val characteristicId: String,
+    val serviceId: String,
+    val result: (Result<ByteArray>) -> Unit,
+)
+
+class DiscoverServicesFuture(
+    val deviceId: String,
+    val result: (Result<List<UniversalBleService>>) -> Unit,
+)
+
+class MtuResultFuture(
+    val deviceId: String,
+    val result: (Result<Long>) -> Unit,
+)
+
+class WriteResultFuture(
+    val deviceId: String,
+    val characteristicId: String,
+    val serviceId: String,
+    val result: (Result<Unit>) -> Unit,
+)

android/src/main/kotlin/com/navideck/universal_ble/UniversalBlePlugin.kt

@@ -0,0 +1,743 @@
+package com.navideck.universal_ble
+
+import android.annotation.SuppressLint
+import android.app.Activity
+import android.bluetooth.*
+import android.bluetooth.BluetoothDevice.BOND_BONDED
+import android.bluetooth.BluetoothDevice.BOND_NONE
+import android.bluetooth.le.ScanCallback
+import android.bluetooth.le.ScanResult
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Context.RECEIVER_EXPORTED
+import android.content.Intent
+import android.content.IntentFilter
+import android.os.Build
+import android.os.Handler
+import android.os.Looper
+import android.util.Log
+import io.flutter.embedding.engine.plugins.FlutterPlugin
+import io.flutter.embedding.engine.plugins.activity.ActivityAware
+import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
+import io.flutter.plugin.common.*
+import java.util.*
+import java.util.concurrent.CountDownLatch
+import java.util.concurrent.TimeUnit
+
+private const val TAG = "UniversalBlePlugin"
+
+@SuppressLint("MissingPermission")
+class UniversalBlePlugin : UniversalBlePlatformChannel, BluetoothGattCallback(), FlutterPlugin,
+    ActivityAware, PluginRegistry.ActivityResultListener {
+    private val bluetoothEnableRequestCode = 2342313
+    private var callbackChannel: UniversalBleCallbackChannel? = null
+    private var mainThreadHandler: Handler? = null
+    private lateinit var context: Context
+    private var activity: Activity? = null
+    private lateinit var bluetoothManager: BluetoothManager
+    private val mtuResultFutureList = mutableListOf<MtuResultFuture>()
+    private val bleCharacteristicFutureList = mutableListOf<BleCharacteristicFuture>()
+    private val discoverServicesFutureList = mutableListOf<DiscoverServicesFuture>()
+    private val writeResultFutureList = mutableListOf<WriteResultFuture>()
+    private val cachedServicesMap = mutableMapOf<String, List<String>>()
+    private val devicesStateMap = mutableMapOf<String, Int>()
+    private var bluetoothEnableRequestFuture: ((Result<Boolean>) -> Unit)? = null
+
+    override fun onAttachedToEngine(flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {
+        UniversalBlePlatformChannel.setUp(flutterPluginBinding.binaryMessenger, this)
+        callbackChannel = UniversalBleCallbackChannel(flutterPluginBinding.binaryMessenger)
+        context = flutterPluginBinding.applicationContext
+        mainThreadHandler = Handler(Looper.getMainLooper())
+        bluetoothManager = context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
+
+        val intentFilter = IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED)
+        intentFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED)
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            context.registerReceiver(broadcastReceiver, intentFilter, RECEIVER_EXPORTED)
+        } else {
+            context.registerReceiver(broadcastReceiver, intentFilter)
+        }
+        cachedServicesMap.putAll(getCachedServicesMap())
+    }
+
+    override fun onDetachedFromEngine(binding: FlutterPlugin.FlutterPluginBinding) {
+        bluetoothManager.adapter.bluetoothLeScanner?.stopScan(scanCallback)
+        context.unregisterReceiver(broadcastReceiver)
+        callbackChannel = null
+        mainThreadHandler = null
+    }
+
+
+    override fun getBluetoothAvailabilityState(callback: (Result<Long>) -> Unit) {
+        callback(
+            Result.success(
+                bluetoothManager.adapter?.state?.toAvailabilityState()
+                    ?: AvailabilityState.Unknown.value
+            )
+        )
+    }
+
+    override fun enableBluetooth(callback: (Result<Boolean>) -> Unit) {
+        if (bluetoothManager.adapter.isEnabled) {
+            callback(Result.success(true))
+            return
+        }
+        if (bluetoothEnableRequestFuture != null) {
+            callback(
+                Result.failure(
+                    FlutterError("Failed", "Bluetooth enable request in progress", null)
+                )
+            )
+            return
+        }
+        val enableBtIntent = Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE)
+        activity?.startActivityForResult(enableBtIntent, bluetoothEnableRequestCode)
+        bluetoothEnableRequestFuture = callback
+    }
+
+    override fun startScan() {
+        if (!isBluetoothAvailable()) throw FlutterError(
+            "BluetoothNotEnabled",
+            "Bluetooth not enabled",
+        )
+        bluetoothManager.adapter.bluetoothLeScanner?.startScan(scanCallback)
+    }
+
+    override fun stopScan() {
+        if (!isBluetoothAvailable()) throw FlutterError(
+            "BluetoothNotEnabled",
+            "Bluetooth not enabled",
+        )
+        // check if already scanning
+        bluetoothManager.adapter.bluetoothLeScanner?.stopScan(scanCallback)
+    }
+
+    override fun connect(deviceId: String) {
+        val currentState = devicesStateMap[deviceId]
+
+        // If already connected, send connected message,
+        // if connecting, do nothing
+        knownGatts.find { it.device.address == deviceId }?.let {
+            if (currentState == BluetoothGatt.STATE_CONNECTED) {
+                Log.e(TAG, "$deviceId Already connected")
+                mainThreadHandler?.post {
+                    callbackChannel?.onConnectionChanged(
+                        deviceId,
+                        BleConnectionState.Connected.value
+                    ) {}
+                }
+                return
+            } else if (currentState == BluetoothGatt.STATE_CONNECTING) {
+                throw FlutterError("Connecting", "Connection already in progress", null)
+            }
+        }
+
+
+        val remoteDevice = bluetoothManager.adapter.getRemoteDevice(deviceId)
+        val gatt = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            remoteDevice.connectGatt(
+                context,
+                false,
+                this,
+                BluetoothDevice.TRANSPORT_LE
+            )
+        } else {
+            remoteDevice.connectGatt(context, false, this)
+        }
+        knownGatts.add(gatt)
+    }
+
+    override fun disconnect(deviceId: String) {
+        // val currentState = devicesStateMap[deviceId]
+        // If `disconnect` is called before BluetoothGatt.STATE_CONNECTED or BluetoothGatt.STATE_CONNECTING
+        // there will be no `disconnected` message any more from callback
+        //        if (currentState != null && currentState != BluetoothGatt.STATE_CONNECTED) {
+        //            Log.e(TAG, "$deviceId Already disconnected or disconnecting")
+        //            mainThreadHandler?.post {
+        //                callbackChannel?.onConnectionChanged(
+        //                    deviceId,
+        //                    BleConnectionState.Disconnected.value
+        //                ) {}
+        //            }
+        //            return
+        //}
+        cleanConnection(deviceId.toBluetoothGatt())
+    }
+
+    override fun discoverServices(
+        deviceId: String,
+        callback: (Result<List<UniversalBleService>>) -> Unit,
+    ) {
+        if (!deviceId.toBluetoothGatt().discoverServices()) {
+            callback(Result.failure(FlutterError("Failed", "Failed to discover services", null)))
+            return
+        }
+        discoverServicesFutureList.add(DiscoverServicesFuture(deviceId, callback))
+    }
+
+    override fun onServicesDiscovered(gatt: BluetoothGatt, status: Int) {
+        if (status != BluetoothGatt.GATT_SUCCESS) {
+            discoverServicesFutureList.filter { it.deviceId == gatt.device.address }.forEach {
+                discoverServicesFutureList.remove(it)
+                it.result(
+                    Result.failure(FlutterError("Failed", "Failed to discover services", null))
+                )
+            }
+            return
+        }
+        setCachedServices(gatt.device.address, gatt.services.map { it.uuid.toString() })
+        val universalBleServices = gatt.services.map { service ->
+            UniversalBleService(
+                uuid = service.uuid.toString(),
+                characteristics = service.characteristics.map {
+                    UniversalBleCharacteristic(
+                        uuid = it.uuid.toString(),
+                        properties = it.getPropertiesList()
+                    )
+                }
+            )
+        }
+        discoverServicesFutureList.filter { it.deviceId == gatt.device.address }.forEach {
+            discoverServicesFutureList.remove(it)
+            it.result(Result.success(universalBleServices))
+        }
+    }
+
+
+    override fun setNotifiable(
+        deviceId: String,
+        service: String,
+        characteristic: String,
+        bleInputProperty: Long,
+    ) {
+        val gatt = deviceId.toBluetoothGatt()
+        val gattCharacteristic = gatt.getCharacteristic(service, characteristic)
+            ?: throw FlutterError(
+                "IllegalArgument",
+                "Unknown characteristic: $characteristic",
+                null
+            )
+        gatt.setNotifiable(gattCharacteristic, bleInputProperty)
+    }
+
+    override fun readValue(
+        deviceId: String,
+        service: String,
+        characteristic: String,
+        callback: (Result<ByteArray>) -> Unit,
+    ) {
+        try {
+            val gatt = deviceId.toBluetoothGatt()
+            val gattCharacteristic = gatt.getCharacteristic(service, characteristic)
+            if (gattCharacteristic == null) {
+                callback(
+                    Result.failure(FlutterError("IllegalArgument", "Unknown characteristic", null))
+                )
+                return
+            }
+            if (!gatt.readCharacteristic(gattCharacteristic)) {
+                callback(
+                    Result.failure(unknownCharacteristicError(characteristic))
+                )
+                return
+            }
+
+            bleCharacteristicFutureList.add(
+                BleCharacteristicFuture(
+                    gatt.device.address,
+                    gattCharacteristic.uuid.toString(),
+                    gattCharacteristic.service.uuid.toString(),
+                    callback
+                )
+            )
+        } catch (e: FlutterError) {
+            callback(Result.failure(e))
+        }
+    }
+
+    override fun onCharacteristicRead(
+        gatt: BluetoothGatt,
+        characteristic: BluetoothGattCharacteristic,
+        value: ByteArray,
+        status: Int,
+    ) {
+        bleCharacteristicFutureList.filter {
+            it.deviceId == gatt.device.address &&
+                    it.characteristicId == characteristic.uuid.toString() &&
+                    it.serviceId == characteristic.service.uuid.toString()
+        }.forEach {
+            bleCharacteristicFutureList.remove(it)
+            it.result(Result.success(value))
+        }
+    }
+
+    override fun onCharacteristicRead(
+        gatt: BluetoothGatt,
+        characteristic: BluetoothGattCharacteristic,
+        status: Int,
+    ) {
+        // Pass data to new api
+        onCharacteristicRead(gatt, characteristic, characteristic.value, status)
+    }
+
+
+    override fun writeValue(
+        deviceId: String,
+        service: String,
+        characteristic: String,
+        value: ByteArray,
+        bleOutputProperty: Long,
+        callback: (Result<Unit>) -> Unit,
+    ) {
+        try {
+            val gatt = deviceId.toBluetoothGatt()
+            val gattCharacteristic = gatt.getCharacteristic(service, characteristic)
+            if (gattCharacteristic == null) {
+                callback(Result.failure(unknownCharacteristicError(characteristic)))
+                return
+            }
+
+            var writeType = BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT
+            if (bleOutputProperty == BleOutputProperty.withResponse.value) {
+                if (gattCharacteristic.properties and BluetoothGattCharacteristic.PROPERTY_WRITE == 0) {
+                    callback(
+                        Result.failure(
+                            FlutterError(
+                                "IllegalArgument",
+                                "Characteristic does not support write withResponse",
+                                null
+                            )
+                        )
+                    )
+                    return
+                }
+                writeType = BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT
+            } else if (bleOutputProperty == BleOutputProperty.withoutResponse.value) {
+                if (gattCharacteristic.properties and BluetoothGattCharacteristic.PROPERTY_WRITE_NO_RESPONSE == 0) {
+                    callback(
+                        Result.failure(
+                            FlutterError(
+                                "IllegalArgument",
+                                "Characteristic does not support write withoutResponse",
+                                null
+                            )
+                        )
+                    )
+                    return
+                }
+                writeType = BluetoothGattCharacteristic.WRITE_TYPE_NO_RESPONSE
+            }
+//        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+//            val result = gatt.writeCharacteristic(gattCharacteristic, value, writeType)
+//            Log.v(TAG,"writeResult $characteristic: $result => ${result.parseBluetoothStatusCodeError()}")
+//            return
+//        }
+            gattCharacteristic.value = value
+            gattCharacteristic.writeType = writeType
+            val result = gatt.writeCharacteristic(gattCharacteristic)
+            if (!result) {
+                callback(Result.failure(FlutterError("Failed", "Failed to write", null)))
+                return
+            }
+            if (writeType == BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT) {
+                // wait for the result
+                writeResultFutureList.add(
+                    WriteResultFuture(
+                        gatt.device.address,
+                        gattCharacteristic.uuid.toString(),
+                        gattCharacteristic.service.uuid.toString(),
+                        callback
+                    )
+                )
+            } else {
+                callback(Result.success(Unit))
+            }
+        } catch (e: FlutterError) {
+            callback(Result.failure(e))
+        }
+    }
+
+    override fun onCharacteristicWrite(
+        gatt: BluetoothGatt?,
+        characteristic: BluetoothGattCharacteristic,
+        status: Int,
+    ) {
+        writeResultFutureList.filter {
+            it.deviceId == gatt?.device?.address &&
+                    it.characteristicId == characteristic.uuid.toString() &&
+                    it.serviceId == characteristic.service.uuid.toString()
+        }.forEach {
+            writeResultFutureList.remove(it)
+            if (status == BluetoothGatt.GATT_SUCCESS) {
+                it.result(Result.success(Unit))
+            } else {
+                it.result(
+                    Result.failure(
+                        FlutterError(
+                            "Failed",
+                            "Failed to write ($status)",
+                            "status $status"
+                        )
+                    )
+                )
+            }
+        }
+    }
+
+
+    override fun requestMtu(deviceId: String, expectedMtu: Long, callback: (Result<Long>) -> Unit) {
+        val gatt = deviceId.toBluetoothGatt()
+        gatt.requestMtu(expectedMtu.toInt())
+        mtuResultFutureList.add(MtuResultFuture(deviceId, callback))
+    }
+
+    override fun onMtuChanged(gatt: BluetoothGatt?, mtu: Int, status: Int) {
+        val deviceId = gatt?.device?.address ?: return
+        mtuResultFutureList.filter { it.deviceId == deviceId }.forEach {
+            mtuResultFutureList.remove(it)
+            if (status == BluetoothGatt.GATT_SUCCESS) {
+                it.result(Result.success(mtu.toLong()))
+            } else {
+                it.result(Result.failure(FlutterError("Failed to change MTU", null, null)))
+            }
+        }
+    }
+
+    override fun isPaired(deviceId: String, callback: (Result<Boolean>) -> Unit) {
+        val remoteDevice: BluetoothDevice =
+            bluetoothManager.adapter.getRemoteDevice(deviceId)
+        callback(Result.success(remoteDevice.bondState == BOND_BONDED))
+    }
+
+    override fun pair(deviceId: String) {
+        val remoteDevice =
+            bluetoothManager.adapter.getRemoteDevice(deviceId)
+        if (remoteDevice.bondState == BOND_NONE) {
+            if (!remoteDevice.createBond()) {
+                throw FlutterError("Failed", "Failed to pair", null)
+            }
+        } else {
+            throw FlutterError("AlreadyPair", "Already paired", null)
+        }
+    }
+
+    override fun unPair(deviceId: String) {
+        val remoteDevice: BluetoothDevice =
+            bluetoothManager.adapter.getRemoteDevice(deviceId)
+        if (remoteDevice.bondState == BOND_BONDED) {
+            remoteDevice.removeBond()
+        }
+    }
+
+    override fun getConnectedDevices(
+        withServices: List<String>,
+        callback: (Result<List<UniversalBleScanResult>>) -> Unit,
+    ) {
+        var devices: List<BluetoothDevice> =
+            bluetoothManager.getConnectedDevices(BluetoothProfile.GATT)
+        if (withServices.isNotEmpty()) {
+            devices = filterDevicesByServices(devices, withServices)
+        }
+        callback(
+            Result.success(
+                devices.map {
+                    UniversalBleScanResult(
+                        name = it.name,
+                        deviceId = it.address,
+                        isPaired = it.bondState == BOND_BONDED,
+                        manufacturerDataHead = null,
+                        manufacturerData = null,
+                        rssi = null,
+                    )
+                }
+            )
+        )
+    }
+
+    private fun filterDevicesByServices(
+        devices: List<BluetoothDevice>,
+        withServices: List<String>,
+    ): List<BluetoothDevice> {
+        // If all devices have cached services
+        if (devices.all { cachedServicesMap[it.address] != null }) {
+            return devices.filter { device ->
+                cachedServicesMap[device.address]?.any { uuid -> withServices.contains(uuid) } == true
+            }
+        }
+
+        // Else discover services off already connected devices
+        val latch = CountDownLatch(devices.size)
+        val resultMap = mutableMapOf<String, Boolean>()
+
+        devices.forEach { device ->
+            discoverServicesOffAlreadyConnectedDevice(device) { uuids ->
+                resultMap[device.address] =
+                    uuids?.any { uuid -> withServices.contains(uuid) } == true
+                latch.countDown()
+            }
+        }
+
+        try {
+            val timeout = (devices.size * 2).toLong()
+            latch.await(timeout, TimeUnit.SECONDS)
+        } catch (e: InterruptedException) {
+            Thread.currentThread().interrupt()
+        }
+
+        return devices.filter { resultMap[it.address] == true }
+    }
+
+    private fun discoverServicesOffAlreadyConnectedDevice(
+        device: BluetoothDevice,
+        callback: (List<String>?) -> Unit,
+    ) {
+        // Check if already cached
+        cachedServicesMap[device.address]?.let {
+            callback(it)
+            return
+        }
+
+        // To avoid duplicate callback
+        var isUpdated = false
+        fun updateCallback(uuids: List<String>?) {
+            if (isUpdated) return
+            callback(uuids)
+            isUpdated = true
+        }
+
+        // If its a known gatt, just discover services
+        knownGatts.find { it.device.address == device.address }?.let {
+            it.services?.let { services ->
+                updateCallback(services.map { service -> service.uuid.toString() })
+                return
+            }
+
+            if (it.discoverServices()) {
+                discoverServicesFutureList.add(
+                    DiscoverServicesFuture(device.address) { uuids: Result<List<UniversalBleService>> ->
+                        if (uuids.isSuccess) {
+                            updateCallback(uuids.getOrNull()?.map { it.uuid })
+                        } else {
+                            updateCallback(null)
+                        }
+                    }
+                )
+                return
+            }
+        }
+
+        // Else connect to Gatt, discover services, then disconnect
+        val callbackHandler = object : BluetoothGattCallback() {
+            override fun onConnectionStateChange(gatt: BluetoothGatt?, status: Int, newState: Int) {
+                if (status == BluetoothGatt.GATT_SUCCESS && newState == BluetoothGatt.STATE_CONNECTED) {
+                    if (gatt?.discoverServices() != true) {
+                        updateCallback(null)
+                        if (!knownGatts.any { it.device.address == device.address }) {
+                            gatt?.disconnect()
+                        }
+                    }
+                } else {
+                    updateCallback(null)
+                }
+            }
+
+            override fun onServicesDiscovered(gatt: BluetoothGatt?, status: Int) {
+                if (status == BluetoothGatt.GATT_SUCCESS) {
+                    val uuids = gatt?.services?.map { it.uuid.toString() }
+                    if (uuids != null) {
+                        setCachedServices(device.address, uuids)
+                    }
+                    updateCallback(uuids)
+                }
+                if (!knownGatts.any { it.device.address == device.address }) {
+                    gatt?.disconnect()
+                }
+            }
+        }
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            device.connectGatt(context, false, callbackHandler, BluetoothDevice.TRANSPORT_LE)
+        } else {
+            device.connectGatt(context, false, callbackHandler)
+        }
+    }
+
+    private fun cleanConnection(gatt: BluetoothGatt) {
+        knownGatts.remove(gatt)
+        gatt.disconnect()
+        bleCharacteristicFutureList.removeAll {
+            it.deviceId == gatt.device.address
+        }
+        mtuResultFutureList.removeAll {
+            it.deviceId == gatt.device.address
+        }
+        discoverServicesFutureList.removeAll {
+            it.deviceId == gatt.device.address
+        }
+    }
+
+    private val broadcastReceiver = object : BroadcastReceiver() {
+        override fun onReceive(context: Context, intent: Intent) {
+            if (intent.action == BluetoothAdapter.ACTION_STATE_CHANGED) {
+                mainThreadHandler?.post {
+                    callbackChannel?.onAvailabilityChanged(
+                        bluetoothManager.adapter?.state?.toAvailabilityState()
+                            ?: AvailabilityState.Unknown.value
+                    ) {}
+                }
+            } else if (intent.action == BluetoothDevice.ACTION_BOND_STATE_CHANGED) {
+                val device: BluetoothDevice =
+                    intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE) ?: return
+                // get pairing failed error
+                when (intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, BluetoothDevice.ERROR)) {
+                    BluetoothDevice.BOND_BONDING -> {
+                        Log.v(TAG, "${device.address} BOND_BONDING")
+                    }
+
+                    BluetoothDevice.ERROR -> {
+                        mainThreadHandler?.post {
+                            callbackChannel?.onPairStateChange(
+                                device.address,
+                                false,
+                                "No pairing state received"
+                            ) {}
+                        }
+                    }
+
+                    BOND_BONDED -> {
+                        mainThreadHandler?.post {
+                            callbackChannel?.onPairStateChange(
+                                device.address,
+                                true,
+                                null
+                            ) {}
+                        }
+                    }
+
+
+                    BOND_NONE -> {
+                        mainThreadHandler?.post {
+                            callbackChannel?.onPairStateChange(
+                                device.address,
+                                false,
+                                null
+                            ) {}
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private val scanCallback = object : ScanCallback() {
+        override fun onScanFailed(errorCode: Int) {
+            Log.e(TAG, "OnScanFailed: ${errorCode.parseScanErrorMessage()}")
+        }
+
+        override fun onScanResult(callbackType: Int, result: ScanResult) {
+            // Log.v(TAG, "onScanResult: $result")
+            mainThreadHandler?.post {
+                callbackChannel?.onScanResult(
+                    UniversalBleScanResult(
+                        name = result.device.name,
+                        deviceId = result.device.address,
+                        isPaired = result.device.bondState == BOND_BONDED,
+                        manufacturerDataHead = result.manufacturerDataHead,
+                        rssi = result.rssi.toLong()
+                    )
+                ) {}
+            }
+        }
+
+        override fun onBatchScanResults(results: MutableList<ScanResult>?) {
+            Log.v(TAG, "onBatchScanResults: $results")
+        }
+    }
+
+
+    override fun onConnectionStateChange(gatt: BluetoothGatt, status: Int, newState: Int) {
+        devicesStateMap[gatt.device.address] = newState
+        if (newState == BluetoothGatt.STATE_CONNECTED && status == BluetoothGatt.GATT_SUCCESS) {
+            mainThreadHandler?.post {
+                callbackChannel?.onConnectionChanged(
+                    gatt.device.address,
+                    BleConnectionState.Connected.value
+                ) {}
+            }
+        } else {
+            cleanConnection(gatt)
+            mainThreadHandler?.post {
+                callbackChannel?.onConnectionChanged(
+                    gatt.device.address,
+                    BleConnectionState.Disconnected.value
+                ) {}
+            }
+        }
+    }
+
+    override fun onCharacteristicChanged(
+        gatt: BluetoothGatt,
+        characteristic: BluetoothGattCharacteristic,
+    ) {
+        mainThreadHandler?.post {
+            callbackChannel?.onValueChanged(
+                deviceIdArg = gatt.device.address,
+                characteristicIdArg = characteristic.uuid.toString(),
+                valueArg = characteristic.value
+            ) {}
+        }
+    }
+
+    private fun isBluetoothAvailable(): Boolean {
+        return bluetoothManager.adapter.isEnabled
+    }
+
+    private fun setCachedServices(deviceId: String, services: List<String>) {
+        val cachedServicesSharedPref = context.getSharedPreferences(
+            "com.navideck.universal_ble.services",
+            Context.MODE_PRIVATE
+        )
+        cachedServicesSharedPref.edit().putStringSet(deviceId, services.toSet()).apply()
+        cachedServicesMap[deviceId] = services
+    }
+
+    private fun getCachedServicesMap(): Map<String, List<String>> {
+        val cachedServicesSharedPref = context.getSharedPreferences(
+            "com.navideck.universal_ble.services",
+            Context.MODE_PRIVATE
+        )
+        return cachedServicesSharedPref.all.mapValues { (_, value) ->
+            (value as? Set<*>)?.map { it.toString() } ?: emptyList()
+        }
+    }
+
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?): Boolean {
+        if (requestCode == bluetoothEnableRequestCode) {
+            val future = bluetoothEnableRequestFuture ?: return false
+            future(Result.success(resultCode == Activity.RESULT_OK))
+            bluetoothEnableRequestFuture = null
+            return true
+        }
+        return false
+    }
+
+    override fun onAttachedToActivity(binding: ActivityPluginBinding) {
+        activity = binding.activity
+        binding.addActivityResultListener(this)
+    }
+
+    override fun onDetachedFromActivity() {
+        activity = null
+    }
+
+    override fun onDetachedFromActivityForConfigChanges() {}
+    override fun onReattachedToActivityForConfigChanges(binding: ActivityPluginBinding) {}
+}
+
+
+
+
+
+
+
+

android/src/test/kotlin/com/navideck/universal_ble/UniversalBlePluginTest.kt

@@ -0,0 +1,27 @@
+package com.navideck.universal_ble
+
+import io.flutter.plugin.common.MethodCall
+import io.flutter.plugin.common.MethodChannel
+import kotlin.test.Test
+import org.mockito.Mockito
+
+/*
+ * This demonstrates a simple unit test of the Kotlin portion of this plugin's implementation.
+ *
+ * Once you have built the plugin's example app, you can run these tests from the command
+ * line by running `./gradlew testDebugUnitTest` in the `example/android/` directory, or
+ * you can run them directly from IDEs that support JUnit such as Android Studio.
+ */
+
+internal class UniversalBlePluginTest {
+  @Test
+  fun onMethodCall_getPlatformVersion_returnsExpectedValue() {
+    val plugin = UniversalBlePlugin()
+
+    val call = MethodCall("getPlatformVersion", null)
+    val mockResult: MethodChannel.Result = Mockito.mock(MethodChannel.Result::class.java)
+    plugin.onMethodCall(call, mockResult)
+
+    Mockito.verify(mockResult).success("Android " + android.os.Build.VERSION.RELEASE)
+  }
+}

darwin/.gitignore

@@ -0,0 +1,38 @@
+.idea/
+.vagrant/
+.sconsign.dblite
+.svn/
+
+.DS_Store
+*.swp
+profile
+
+DerivedData/
+build/
+GeneratedPluginRegistrant.h
+GeneratedPluginRegistrant.m
+
+.generated/
+
+*.pbxuser
+*.mode1v3
+*.mode2v3
+*.perspectivev3
+
+!default.pbxuser
+!default.mode1v3
+!default.mode2v3
+!default.perspectivev3
+
+xcuserdata
+
+*.moved-aside
+
+*.pyc
+*sync/
+Icon?
+.tags*
+
+/Flutter/Generated.xcconfig
+/Flutter/ephemeral/
+/Flutter/flutter_export_environment.sh

darwin/Classes/UniversalBle.g.swift

@@ -0,0 +1,525 @@
+// Autogenerated from Pigeon (v13.0.0), do not edit directly.
+// See also: https://pub.dev/packages/pigeon
+
+import Foundation
+#if os(iOS)
+import Flutter
+#elseif os(macOS)
+import FlutterMacOS
+#else
+#error("Unsupported platform.")
+#endif
+
+private func isNullish(_ value: Any?) -> Bool {
+  return value is NSNull || value == nil
+}
+
+private func wrapResult(_ result: Any?) -> [Any?] {
+  return [result]
+}
+
+private func wrapError(_ error: Any) -> [Any?] {
+  if let flutterError = error as? FlutterError {
+    return [
+      flutterError.code,
+      flutterError.message,
+      flutterError.details
+    ]
+  }
+  return [
+    "\(error)",
+    "\(type(of: error))",
+    "Stacktrace: \(Thread.callStackSymbols)"
+  ]
+}
+
+private func nilOrValue<T>(_ value: Any?) -> T? {
+  if value is NSNull { return nil }
+  return value as! T?
+}
+
+/// Generated class from Pigeon that represents data sent in messages.
+struct UniversalBleScanResult {
+  var deviceId: String
+  var name: String? = nil
+  var isPaired: Bool? = nil
+  var rssi: Int64? = nil
+  var manufacturerData: FlutterStandardTypedData? = nil
+  var manufacturerDataHead: FlutterStandardTypedData? = nil
+
+  static func fromList(_ list: [Any?]) -> UniversalBleScanResult? {
+    let deviceId = list[0] as! String
+    let name: String? = nilOrValue(list[1])
+    let isPaired: Bool? = nilOrValue(list[2])
+    let rssi: Int64? = isNullish(list[3]) ? nil : (list[3] is Int64? ? list[3] as! Int64? : Int64(list[3] as! Int32))
+    let manufacturerData: FlutterStandardTypedData? = nilOrValue(list[4])
+    let manufacturerDataHead: FlutterStandardTypedData? = nilOrValue(list[5])
+
+    return UniversalBleScanResult(
+      deviceId: deviceId,
+      name: name,
+      isPaired: isPaired,
+      rssi: rssi,
+      manufacturerData: manufacturerData,
+      manufacturerDataHead: manufacturerDataHead
+    )
+  }
+  func toList() -> [Any?] {
+    return [
+      deviceId,
+      name,
+      isPaired,
+      rssi,
+      manufacturerData,
+      manufacturerDataHead,
+    ]
+  }
+}
+
+/// Generated class from Pigeon that represents data sent in messages.
+struct UniversalBleService {
+  var uuid: String
+  var characteristics: [UniversalBleCharacteristic?]? = nil
+
+  static func fromList(_ list: [Any?]) -> UniversalBleService? {
+    let uuid = list[0] as! String
+    let characteristics: [UniversalBleCharacteristic?]? = nilOrValue(list[1])
+
+    return UniversalBleService(
+      uuid: uuid,
+      characteristics: characteristics
+    )
+  }
+  func toList() -> [Any?] {
+    return [
+      uuid,
+      characteristics,
+    ]
+  }
+}
+
+/// Generated class from Pigeon that represents data sent in messages.
+struct UniversalBleCharacteristic {
+  var uuid: String
+  var properties: [Int64?]
+
+  static func fromList(_ list: [Any?]) -> UniversalBleCharacteristic? {
+    let uuid = list[0] as! String
+    let properties = list[1] as! [Int64?]
+
+    return UniversalBleCharacteristic(
+      uuid: uuid,
+      properties: properties
+    )
+  }
+  func toList() -> [Any?] {
+    return [
+      uuid,
+      properties,
+    ]
+  }
+}
+
+private class UniversalBlePlatformChannelCodecReader: FlutterStandardReader {
+  override func readValue(ofType type: UInt8) -> Any? {
+    switch type {
+      case 128:
+        return UniversalBleCharacteristic.fromList(self.readValue() as! [Any?])
+      case 129:
+        return UniversalBleScanResult.fromList(self.readValue() as! [Any?])
+      case 130:
+        return UniversalBleService.fromList(self.readValue() as! [Any?])
+      default:
+        return super.readValue(ofType: type)
+    }
+  }
+}
+
+private class UniversalBlePlatformChannelCodecWriter: FlutterStandardWriter {
+  override func writeValue(_ value: Any) {
+    if let value = value as? UniversalBleCharacteristic {
+      super.writeByte(128)
+      super.writeValue(value.toList())
+    } else if let value = value as? UniversalBleScanResult {
+      super.writeByte(129)
+      super.writeValue(value.toList())
+    } else if let value = value as? UniversalBleService {
+      super.writeByte(130)
+      super.writeValue(value.toList())
+    } else {
+      super.writeValue(value)
+    }
+  }
+}
+
+private class UniversalBlePlatformChannelCodecReaderWriter: FlutterStandardReaderWriter {
+  override func reader(with data: Data) -> FlutterStandardReader {
+    return UniversalBlePlatformChannelCodecReader(data: data)
+  }
+
+  override func writer(with data: NSMutableData) -> FlutterStandardWriter {
+    return UniversalBlePlatformChannelCodecWriter(data: data)
+  }
+}
+
+class UniversalBlePlatformChannelCodec: FlutterStandardMessageCodec {
+  static let shared = UniversalBlePlatformChannelCodec(readerWriter: UniversalBlePlatformChannelCodecReaderWriter())
+}
+
+/// Flutter -> Native
+///
+/// Generated protocol from Pigeon that represents a handler of messages from Flutter.
+protocol UniversalBlePlatformChannel {
+  func getBluetoothAvailabilityState(completion: @escaping (Result<Int64, Error>) -> Void)
+  func enableBluetooth(completion: @escaping (Result<Bool, Error>) -> Void)
+  func startScan() throws
+  func stopScan() throws
+  func connect(deviceId: String) throws
+  func disconnect(deviceId: String) throws
+  func setNotifiable(deviceId: String, service: String, characteristic: String, bleInputProperty: Int64) throws
+  func discoverServices(deviceId: String, completion: @escaping (Result<[UniversalBleService], Error>) -> Void)
+  func readValue(deviceId: String, service: String, characteristic: String, completion: @escaping (Result<FlutterStandardTypedData, Error>) -> Void)
+  func requestMtu(deviceId: String, expectedMtu: Int64, completion: @escaping (Result<Int64, Error>) -> Void)
+  func writeValue(deviceId: String, service: String, characteristic: String, value: FlutterStandardTypedData, bleOutputProperty: Int64, completion: @escaping (Result<Void, Error>) -> Void)
+  func isPaired(deviceId: String, completion: @escaping (Result<Bool, Error>) -> Void)
+  func pair(deviceId: String) throws
+  func unPair(deviceId: String) throws
+  func getConnectedDevices(withServices: [String], completion: @escaping (Result<[UniversalBleScanResult], Error>) -> Void)
+}
+
+/// Generated setup class from Pigeon to handle messages through the `binaryMessenger`.
+class UniversalBlePlatformChannelSetup {
+  /// The codec used by UniversalBlePlatformChannel.
+  static var codec: FlutterStandardMessageCodec { UniversalBlePlatformChannelCodec.shared }
+  /// Sets up an instance of `UniversalBlePlatformChannel` to handle messages through the `binaryMessenger`.
+  static func setUp(binaryMessenger: FlutterBinaryMessenger, api: UniversalBlePlatformChannel?) {
+    let getBluetoothAvailabilityStateChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.getBluetoothAvailabilityState", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      getBluetoothAvailabilityStateChannel.setMessageHandler { _, reply in
+        api.getBluetoothAvailabilityState() { result in
+          switch result {
+            case .success(let res):
+              reply(wrapResult(res))
+            case .failure(let error):
+              reply(wrapError(error))
+          }
+        }
+      }
+    } else {
+      getBluetoothAvailabilityStateChannel.setMessageHandler(nil)
+    }
+    let enableBluetoothChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.enableBluetooth", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      enableBluetoothChannel.setMessageHandler { _, reply in
+        api.enableBluetooth() { result in
+          switch result {
+            case .success(let res):
+              reply(wrapResult(res))
+            case .failure(let error):
+              reply(wrapError(error))
+          }
+        }
+      }
+    } else {
+      enableBluetoothChannel.setMessageHandler(nil)
+    }
+    let startScanChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.startScan", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      startScanChannel.setMessageHandler { _, reply in
+        do {
+          try api.startScan()
+          reply(wrapResult(nil))
+        } catch {
+          reply(wrapError(error))
+        }
+      }
+    } else {
+      startScanChannel.setMessageHandler(nil)
+    }
+    let stopScanChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.stopScan", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      stopScanChannel.setMessageHandler { _, reply in
+        do {
+          try api.stopScan()
+          reply(wrapResult(nil))
+        } catch {
+          reply(wrapError(error))
+        }
+      }
+    } else {
+      stopScanChannel.setMessageHandler(nil)
+    }
+    let connectChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.connect", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      connectChannel.setMessageHandler { message, reply in
+        let args = message as! [Any?]
+        let deviceIdArg = args[0] as! String
+        do {
+          try api.connect(deviceId: deviceIdArg)
+          reply(wrapResult(nil))
+        } catch {
+          reply(wrapError(error))
+        }
+      }
+    } else {
+      connectChannel.setMessageHandler(nil)
+    }
+    let disconnectChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.disconnect", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      disconnectChannel.setMessageHandler { message, reply in
+        let args = message as! [Any?]
+        let deviceIdArg = args[0] as! String
+        do {
+          try api.disconnect(deviceId: deviceIdArg)
+          reply(wrapResult(nil))
+        } catch {
+          reply(wrapError(error))
+        }
+      }
+    } else {
+      disconnectChannel.setMessageHandler(nil)
+    }
+    let setNotifiableChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.setNotifiable", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      setNotifiableChannel.setMessageHandler { message, reply in
+        let args = message as! [Any?]
+        let deviceIdArg = args[0] as! String
+        let serviceArg = args[1] as! String
+        let characteristicArg = args[2] as! String
+        let bleInputPropertyArg = args[3] is Int64 ? args[3] as! Int64 : Int64(args[3] as! Int32)
+        do {
+          try api.setNotifiable(deviceId: deviceIdArg, service: serviceArg, characteristic: characteristicArg, bleInputProperty: bleInputPropertyArg)
+          reply(wrapResult(nil))
+        } catch {
+          reply(wrapError(error))
+        }
+      }
+    } else {
+      setNotifiableChannel.setMessageHandler(nil)
+    }
+    let discoverServicesChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.discoverServices", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      discoverServicesChannel.setMessageHandler { message, reply in
+        let args = message as! [Any?]
+        let deviceIdArg = args[0] as! String
+        api.discoverServices(deviceId: deviceIdArg) { result in
+          switch result {
+            case .success(let res):
+              reply(wrapResult(res))
+            case .failure(let error):
+              reply(wrapError(error))
+          }
+        }
+      }
+    } else {
+      discoverServicesChannel.setMessageHandler(nil)
+    }
+    let readValueChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.readValue", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      readValueChannel.setMessageHandler { message, reply in
+        let args = message as! [Any?]
+        let deviceIdArg = args[0] as! String
+        let serviceArg = args[1] as! String
+        let characteristicArg = args[2] as! String
+        api.readValue(deviceId: deviceIdArg, service: serviceArg, characteristic: characteristicArg) { result in
+          switch result {
+            case .success(let res):
+              reply(wrapResult(res))
+            case .failure(let error):
+              reply(wrapError(error))
+          }
+        }
+      }
+    } else {
+      readValueChannel.setMessageHandler(nil)
+    }
+    let requestMtuChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.requestMtu", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      requestMtuChannel.setMessageHandler { message, reply in
+        let args = message as! [Any?]
+        let deviceIdArg = args[0] as! String
+        let expectedMtuArg = args[1] is Int64 ? args[1] as! Int64 : Int64(args[1] as! Int32)
+        api.requestMtu(deviceId: deviceIdArg, expectedMtu: expectedMtuArg) { result in
+          switch result {
+            case .success(let res):
+              reply(wrapResult(res))
+            case .failure(let error):
+              reply(wrapError(error))
+          }
+        }
+      }
+    } else {
+      requestMtuChannel.setMessageHandler(nil)
+    }
+    let writeValueChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.writeValue", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      writeValueChannel.setMessageHandler { message, reply in
+        let args = message as! [Any?]
+        let deviceIdArg = args[0] as! String
+        let serviceArg = args[1] as! String
+        let characteristicArg = args[2] as! String
+        let valueArg = args[3] as! FlutterStandardTypedData
+        let bleOutputPropertyArg = args[4] is Int64 ? args[4] as! Int64 : Int64(args[4] as! Int32)
+        api.writeValue(deviceId: deviceIdArg, service: serviceArg, characteristic: characteristicArg, value: valueArg, bleOutputProperty: bleOutputPropertyArg) { result in
+          switch result {
+            case .success:
+              reply(wrapResult(nil))
+            case .failure(let error):
+              reply(wrapError(error))
+          }
+        }
+      }
+    } else {
+      writeValueChannel.setMessageHandler(nil)
+    }
+    let isPairedChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.isPaired", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      isPairedChannel.setMessageHandler { message, reply in
+        let args = message as! [Any?]
+        let deviceIdArg = args[0] as! String
+        api.isPaired(deviceId: deviceIdArg) { result in
+          switch result {
+            case .success(let res):
+              reply(wrapResult(res))
+            case .failure(let error):
+              reply(wrapError(error))
+          }
+        }
+      }
+    } else {
+      isPairedChannel.setMessageHandler(nil)
+    }
+    let pairChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.pair", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      pairChannel.setMessageHandler { message, reply in
+        let args = message as! [Any?]
+        let deviceIdArg = args[0] as! String
+        do {
+          try api.pair(deviceId: deviceIdArg)
+          reply(wrapResult(nil))
+        } catch {
+          reply(wrapError(error))
+        }
+      }
+    } else {
+      pairChannel.setMessageHandler(nil)
+    }
+    let unPairChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.unPair", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      unPairChannel.setMessageHandler { message, reply in
+        let args = message as! [Any?]
+        let deviceIdArg = args[0] as! String
+        do {
+          try api.unPair(deviceId: deviceIdArg)
+          reply(wrapResult(nil))
+        } catch {
+          reply(wrapError(error))
+        }
+      }
+    } else {
+      unPairChannel.setMessageHandler(nil)
+    }
+    let getConnectedDevicesChannel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.getConnectedDevices", binaryMessenger: binaryMessenger, codec: codec)
+    if let api = api {
+      getConnectedDevicesChannel.setMessageHandler { message, reply in
+        let args = message as! [Any?]
+        let withServicesArg = args[0] as! [String]
+        api.getConnectedDevices(withServices: withServicesArg) { result in
+          switch result {
+            case .success(let res):
+              reply(wrapResult(res))
+            case .failure(let error):
+              reply(wrapError(error))
+          }
+        }
+      }
+    } else {
+      getConnectedDevicesChannel.setMessageHandler(nil)
+    }
+  }
+}
+private class UniversalBleCallbackChannelCodecReader: FlutterStandardReader {
+  override func readValue(ofType type: UInt8) -> Any? {
+    switch type {
+      case 128:
+        return UniversalBleScanResult.fromList(self.readValue() as! [Any?])
+      default:
+        return super.readValue(ofType: type)
+    }
+  }
+}
+
+private class UniversalBleCallbackChannelCodecWriter: FlutterStandardWriter {
+  override func writeValue(_ value: Any) {
+    if let value = value as? UniversalBleScanResult {
+      super.writeByte(128)
+      super.writeValue(value.toList())
+    } else {
+      super.writeValue(value)
+    }
+  }
+}
+
+private class UniversalBleCallbackChannelCodecReaderWriter: FlutterStandardReaderWriter {
+  override func reader(with data: Data) -> FlutterStandardReader {
+    return UniversalBleCallbackChannelCodecReader(data: data)
+  }
+
+  override func writer(with data: NSMutableData) -> FlutterStandardWriter {
+    return UniversalBleCallbackChannelCodecWriter(data: data)
+  }
+}
+
+class UniversalBleCallbackChannelCodec: FlutterStandardMessageCodec {
+  static let shared = UniversalBleCallbackChannelCodec(readerWriter: UniversalBleCallbackChannelCodecReaderWriter())
+}
+
+/// Native -> Flutter
+///
+/// Generated protocol from Pigeon that represents Flutter messages that can be called from Swift.
+protocol UniversalBleCallbackChannelProtocol {
+  func onAvailabilityChanged(state stateArg: Int64, completion: @escaping (Result<Void, FlutterError>) -> Void) 
+  func onPairStateChange(deviceId deviceIdArg: String, isPaired isPairedArg: Bool, error errorArg: String?, completion: @escaping (Result<Void, FlutterError>) -> Void) 
+  func onScanResult(result resultArg: UniversalBleScanResult, completion: @escaping (Result<Void, FlutterError>) -> Void) 
+  func onValueChanged(deviceId deviceIdArg: String, characteristicId characteristicIdArg: String, value valueArg: FlutterStandardTypedData, completion: @escaping (Result<Void, FlutterError>) -> Void) 
+  func onConnectionChanged(deviceId deviceIdArg: String, state stateArg: Int64, completion: @escaping (Result<Void, FlutterError>) -> Void) 
+}
+class UniversalBleCallbackChannel: UniversalBleCallbackChannelProtocol {
+  private let binaryMessenger: FlutterBinaryMessenger
+  init(binaryMessenger: FlutterBinaryMessenger){
+    self.binaryMessenger = binaryMessenger
+  }
+  var codec: FlutterStandardMessageCodec {
+    return UniversalBleCallbackChannelCodec.shared
+  }
+  func onAvailabilityChanged(state stateArg: Int64, completion: @escaping (Result<Void, FlutterError>) -> Void)  {
+    let channel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBleCallbackChannel.onAvailabilityChanged", binaryMessenger: binaryMessenger, codec: codec)
+    channel.sendMessage([stateArg] as [Any?]) { _ in
+      completion(.success(Void()))
+    }
+  }
+  func onPairStateChange(deviceId deviceIdArg: String, isPaired isPairedArg: Bool, error errorArg: String?, completion: @escaping (Result<Void, FlutterError>) -> Void)  {
+    let channel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBleCallbackChannel.onPairStateChange", binaryMessenger: binaryMessenger, codec: codec)
+    channel.sendMessage([deviceIdArg, isPairedArg, errorArg] as [Any?]) { _ in
+      completion(.success(Void()))
+    }
+  }
+  func onScanResult(result resultArg: UniversalBleScanResult, completion: @escaping (Result<Void, FlutterError>) -> Void)  {
+    let channel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBleCallbackChannel.onScanResult", binaryMessenger: binaryMessenger, codec: codec)
+    channel.sendMessage([resultArg] as [Any?]) { _ in
+      completion(.success(Void()))
+    }
+  }
+  func onValueChanged(deviceId deviceIdArg: String, characteristicId characteristicIdArg: String, value valueArg: FlutterStandardTypedData, completion: @escaping (Result<Void, FlutterError>) -> Void)  {
+    let channel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBleCallbackChannel.onValueChanged", binaryMessenger: binaryMessenger, codec: codec)
+    channel.sendMessage([deviceIdArg, characteristicIdArg, valueArg] as [Any?]) { _ in
+      completion(.success(Void()))
+    }
+  }
+  func onConnectionChanged(deviceId deviceIdArg: String, state stateArg: Int64, completion: @escaping (Result<Void, FlutterError>) -> Void)  {
+    let channel = FlutterBasicMessageChannel(name: "dev.flutter.pigeon.universal_ble.UniversalBleCallbackChannel.onConnectionChanged", binaryMessenger: binaryMessenger, codec: codec)
+    channel.sendMessage([deviceIdArg, stateArg] as [Any?]) { _ in
+      completion(.success(Void()))
+    }
+  }
+}

darwin/Classes/UniversalBleHelper.swift

@@ -0,0 +1,172 @@
+//
+//  UniversalBleHelper.swift
+//  universal_ble
+//
+//  Created by Rohit Sangwan on 25/10/23.
+//
+
+import CoreBluetooth
+import Foundation
+#if os(iOS)
+    import Flutter
+#elseif os(OSX)
+    import FlutterMacOS
+#endif
+
+enum BleInputProperty: Int {
+    case disabled = 0
+    case notification = 1
+    case indication = 2
+}
+
+enum BleOutputProperty: Int {
+    case withResponse = 0
+    case withoutResponse = 1
+}
+
+enum BlueConnectionState: Int64 {
+    case connected = 0
+    case disconnected = 1
+}
+
+enum AvailabilityState: Int64 {
+    case unknown = 0
+    case resetting = 1
+    case unsupported = 2
+    case unauthorized = 3
+    case poweredOff = 4
+    case poweredOn = 5
+}
+
+enum CharacteristicProperty: Int64 {
+    case broadcast = 0
+    case read = 1
+    case writeWithoutResponse = 2
+    case write = 3
+    case notify = 4
+    case indicate = 5
+    case authenticatedSignedWrites = 6
+    case extendedProperties = 7
+}
+
+extension CBCharacteristicProperties {
+    var toCharacteristicProperty: [Int64] {
+        var properties = [Int64]()
+        if contains(.broadcast) {
+            properties.append(CharacteristicProperty.broadcast.rawValue)
+        }
+        if contains(.read) {
+            properties.append(CharacteristicProperty.read.rawValue)
+        }
+        if contains(.writeWithoutResponse) {
+            properties.append(CharacteristicProperty.writeWithoutResponse.rawValue)
+        }
+        if contains(.write) {
+            properties.append(CharacteristicProperty.write.rawValue)
+        }
+        if contains(.notify) {
+            properties.append(CharacteristicProperty.notify.rawValue)
+        }
+        if contains(.indicate) {
+            properties.append(CharacteristicProperty.indicate.rawValue)
+        }
+        if contains(.authenticatedSignedWrites) {
+            properties.append(CharacteristicProperty.authenticatedSignedWrites.rawValue)
+        }
+        if contains(.extendedProperties) {
+            properties.append(CharacteristicProperty.extendedProperties.rawValue)
+        }
+        return properties
+    }
+}
+
+extension CBManagerState {
+    func toAvailabilityState() -> AvailabilityState {
+        switch self {
+        case .unknown:
+            return AvailabilityState.unknown
+        case .resetting:
+            return AvailabilityState.resetting
+        case .unsupported:
+            return AvailabilityState.unsupported
+        case .unauthorized:
+            return AvailabilityState.unauthorized
+        case .poweredOff:
+            return AvailabilityState.poweredOff
+        case .poweredOn:
+            return AvailabilityState.poweredOn
+        @unknown default:
+            return AvailabilityState.unknown
+        }
+    }
+}
+
+public extension CBUUID {
+    var uuidStr: String {
+        uuidString.lowercased()
+    }
+}
+
+public extension CBPeripheral {
+    // FIXME: https://forums.developer.apple.com/thread/84375
+    var uuid: UUID {
+        value(forKey: "identifier") as! NSUUID as UUID
+    }
+
+    func getCharacteristic(_ characteristic: String, of service: String) -> CBCharacteristic? {
+        let GSS_SUFFIX = "0000-1000-8000-00805f9b34fb"
+        let s = services?.first {
+            $0.uuid.uuidStr.lowercased() == service.lowercased() || service.lowercased() == "0000\($0.uuid.uuidStr)-\(GSS_SUFFIX)".lowercased()
+        }
+        let c = s?.characteristics?.first {
+            $0.uuid.uuidStr.lowercased() == characteristic.lowercased() || characteristic.lowercased() == "0000\($0.uuid.uuidStr)-\(GSS_SUFFIX)".lowercased()
+        }
+        return c
+    }
+
+    func setNotifiable(_ bleInputProperty: String, for characteristic: String, of service: String) {
+        guard let characteristic = getCharacteristic(characteristic, of: service) else {
+            return
+        }
+        setNotifyValue(bleInputProperty != "disabled", for: characteristic)
+    }
+}
+
+// Future classes
+class CharacteristicReadFuture {
+    let deviceId: String
+    let characteristicId: String
+    let serviceId: String?
+    let result: (Result<FlutterStandardTypedData, Error>) -> Void
+
+    init(deviceId: String, characteristicId: String, serviceId: String?, result: @escaping (Result<FlutterStandardTypedData, Error>) -> Void) {
+        self.deviceId = deviceId
+        self.characteristicId = characteristicId
+        self.serviceId = serviceId
+        self.result = result
+    }
+}
+
+class CharacteristicWriteFuture {
+    let deviceId: String
+    let characteristicId: String
+    let serviceId: String?
+    let result: (Result<Void, Error>) -> Void
+
+    init(deviceId: String, characteristicId: String, serviceId: String?, result: @escaping (Result<Void, Error>) -> Void) {
+        self.deviceId = deviceId
+        self.characteristicId = characteristicId
+        self.serviceId = serviceId
+        self.result = result
+    }
+}
+
+class DiscoverServicesFuture {
+    let deviceId: String
+    let result: (Result<[UniversalBleService], Error>) -> Void
+
+    init(deviceId: String, result: @escaping (Result<[UniversalBleService], Error>) -> Void) {
+        self.deviceId = deviceId
+        self.result = result
+    }
+}

darwin/Classes/UniversalBlePlugin.swift

@@ -0,0 +1,334 @@
+import CoreBluetooth
+
+#if os(iOS)
+  import Flutter
+  import UIKit
+#elseif os(OSX)
+  import Cocoa
+  import FlutterMacOS
+#endif
+
+public class UniversalBlePlugin: NSObject, FlutterPlugin {
+  public static func register(with registrar: FlutterPluginRegistrar) {
+    var messenger: FlutterBinaryMessenger
+    #if os(iOS)
+      messenger = registrar.messenger()
+    #elseif os(macOS)
+      messenger = registrar.messenger
+    #endif
+    let callbackChannel = UniversalBleCallbackChannel(binaryMessenger: messenger)
+    let api = BleCentralDarwin(callbackChannel: callbackChannel)
+    UniversalBlePlatformChannelSetup.setUp(binaryMessenger: messenger, api: api)
+  }
+}
+
+private var discoveredPeripherals = [String: CBPeripheral]()
+
+private class BleCentralDarwin: NSObject, UniversalBlePlatformChannel, CBCentralManagerDelegate, CBPeripheralDelegate {
+  var callbackChannel: UniversalBleCallbackChannel
+  private lazy var manager: CBCentralManager = .init(delegate: self, queue: nil)
+  private var discoveredServicesProgressMap: [String: [UniversalBleService]] = [:]
+  private var characteristicReadFutures = [CharacteristicReadFuture]()
+  private var characteristicWriteFutures = [CharacteristicWriteFuture]()
+  private var discoverServicesFutures = [DiscoverServicesFuture]()
+  private var bluetoothAvailabilityStateCallback: ((Result<Int64, Error>) -> Void)? {
+    didSet {
+      oldValue?(Result.success(AvailabilityState.unknown.rawValue))
+    }
+  }
+  
+  init(callbackChannel: UniversalBleCallbackChannel) {
+    self.callbackChannel = callbackChannel
+    super.init()
+  }
+
+  func getBluetoothAvailabilityState(completion: @escaping (Result<Int64, Error>) -> Void) {
+    let managerState = manager.state
+    
+    if managerState == .unknown {
+      bluetoothAvailabilityStateCallback = completion
+    } else {
+      completion(.success(managerState.toAvailabilityState().rawValue))
+    }
+  }
+    
+  func enableBluetooth(completion: @escaping (Result<Bool, Error>) -> Void) {
+    completion(Result.failure(FlutterError(code: "NotSupported", message: nil, details: nil)))
+  }
+
+  func startScan() throws {
+    manager.scanForPeripherals(withServices: nil)
+  }
+
+  func stopScan() throws {
+    manager.stopScan()
+  }
+
+  func connect(deviceId: String) throws {
+    let peripheral = try deviceId.getPeripheral()
+    peripheral.delegate = self
+    manager.connect(peripheral)
+  }
+
+  func disconnect(deviceId: String) throws {
+    let peripheral = try deviceId.getPeripheral()
+    if peripheral.state != CBPeripheralState.disconnected {
+      manager.cancelPeripheralConnection(peripheral)
+    }
+    cleanUpConnection(deviceId: deviceId)
+  }
+
+  func cleanUpConnection(deviceId: String) {
+    characteristicReadFutures.removeAll { future in
+      future.deviceId == deviceId
+    }
+    discoverServicesFutures.removeAll { future in
+      future.deviceId == deviceId
+    }
+    discoveredServicesProgressMap[deviceId] = nil
+  }
+
+  func discoverServices(deviceId: String, completion: @escaping (Result<[UniversalBleService], Error>) -> Void) {
+    guard let peripheral = discoveredPeripherals[deviceId] else {
+      completion(Result.failure(
+        FlutterError(code: "IllegalArgument", message: "Unknown deviceId:\(self)", details: nil)))
+      return
+    }
+    if discoveredServicesProgressMap[deviceId] != nil {
+      completion(Result.failure(FlutterError(code: "AlreadyInProgress", message: "Services discovery already in progress for :\(deviceId)", details: nil)))
+      return
+    }
+    peripheral.discoverServices(nil)
+    discoverServicesFutures.append(DiscoverServicesFuture(deviceId: deviceId, result: completion))
+  }
+
+  private func onServicesDiscovered(deviceId: String, services: [UniversalBleService]) {
+    discoverServicesFutures.removeAll { future in
+      if future.deviceId == deviceId {
+        future.result(Result.success(services))
+        return true
+      }
+      return false
+    }
+  }
+
+  func setNotifiable(deviceId: String, service: String, characteristic: String, bleInputProperty: Int64) throws {
+    let peripheral = try deviceId.getPeripheral()
+
+    guard let c = peripheral.getCharacteristic(characteristic, of: service) else {
+      throw FlutterError(code: "IllegalArgument", message: "Unknown characteristic:\(characteristic)", details: nil)
+    }
+
+    if bleInputProperty == BleInputProperty.notification.rawValue && !c.properties.contains(.notify) {
+      throw FlutterError(code: "InvalidAction", message: "Characteristic does not support notify", details: nil)
+    }
+
+    if bleInputProperty == BleInputProperty.indication.rawValue && !c.properties.contains(.indicate) {
+      throw FlutterError(code: "InvalidAction", message: "Characteristic does not support indicate", details: nil)
+    }
+
+    let shouldNotify = bleInputProperty != BleInputProperty.disabled.rawValue
+    peripheral.setNotifyValue(shouldNotify, for: c)
+  }
+
+  func readValue(deviceId: String, service: String, characteristic: String, completion: @escaping (Result<FlutterStandardTypedData, Error>) -> Void) {
+    guard let peripheral = discoveredPeripherals[deviceId] else {
+      completion(Result.failure(FlutterError(code: "IllegalArgument", message: "Unknown deviceId:\(self)", details: nil)))
+      return
+    }
+    guard let gattCharacteristic = peripheral.getCharacteristic(characteristic, of: service) else {
+      completion(Result.failure(FlutterError(code: "IllegalArgument", message: "Unknown characteristic:\(characteristic)", details: nil)))
+      return
+    }
+    if !gattCharacteristic.properties.contains(.read) {
+      completion(Result.failure(FlutterError(code: "InvalidAction", message: "Characteristic does not support read", details: nil)))
+      return
+    }
+    peripheral.readValue(for: gattCharacteristic)
+    characteristicReadFutures.append(CharacteristicReadFuture(deviceId: deviceId, characteristicId: gattCharacteristic.uuid.uuidStr, serviceId: gattCharacteristic.service?.uuid.uuidStr, result: completion))
+  }
+
+  func writeValue(deviceId: String, service: String, characteristic: String, value: FlutterStandardTypedData, bleOutputProperty: Int64, completion: @escaping (Result<Void, Error>) -> Void) {
+    guard let peripheral = discoveredPeripherals[deviceId] else {
+      completion(Result.failure(FlutterError(code: "IllegalArgument", message: "Unknown deviceId:\(self)", details: nil)))
+      return
+    }
+    guard let gattCharacteristic = peripheral.getCharacteristic(characteristic, of: service) else {
+      completion(Result.failure(FlutterError(code: "IllegalArgument", message: "Unknown characteristic:\(characteristic)", details: nil)))
+      return
+    }
+
+    let type = bleOutputProperty == BleOutputProperty.withoutResponse.rawValue ? CBCharacteristicWriteType.withoutResponse : CBCharacteristicWriteType.withResponse
+
+    if type == CBCharacteristicWriteType.withResponse {
+      if !gattCharacteristic.properties.contains(.write) {
+        completion(Result.failure(FlutterError(code: "InvalidAction", message: "Characteristic does not support write withResponse", details: nil)))
+        return
+      }
+    } else if type == CBCharacteristicWriteType.withoutResponse {
+      if !gattCharacteristic.properties.contains(.writeWithoutResponse) {
+        completion(Result.failure(FlutterError(code: "InvalidAction", message: "Characteristic does not support write withoutResponse", details: nil)))
+        return
+      }
+    }
+    peripheral.writeValue(value.data, for: gattCharacteristic, type: type)
+
+    if type == CBCharacteristicWriteType.withResponse {
+      // Wait for future response
+      characteristicWriteFutures.append(CharacteristicWriteFuture(deviceId: deviceId, characteristicId: gattCharacteristic.uuid.uuidStr, serviceId: gattCharacteristic.service?.uuid.uuidStr, result: completion))
+    } else {
+      completion(Result.success({}()))
+    }
+  }
+
+  func requestMtu(deviceId: String, expectedMtu _: Int64, completion: @escaping (Result<Int64, Error>) -> Void) {
+    guard let peripheral = discoveredPeripherals[deviceId] else {
+      completion(Result.failure(FlutterError(code: "IllegalArgument", message: "Unknown deviceId:\(self)", details: nil)))
+      return
+    }
+    let mtu = peripheral.maximumWriteValueLength(for: CBCharacteristicWriteType.withoutResponse)
+    let GATT_HEADER_LENGTH = 3
+    let mtuResult = Int64(mtu + GATT_HEADER_LENGTH)
+    completion(Result.success(mtuResult))
+  }
+
+  func isPaired(deviceId _: String, completion: @escaping (Result<Bool, Error>) -> Void) {
+    completion(Result.failure(FlutterError(code: "NotSupported", message: nil, details: nil)))
+  }
+
+  func pair(deviceId _: String) throws {
+    throw FlutterError(code: "NotSupported", message: nil, details: nil)
+  }
+
+  func unPair(deviceId _: String) throws {
+    throw FlutterError(code: "NotSupported", message: nil, details: nil)
+  }
+
+  func getConnectedDevices(withServices: [String], completion: @escaping (Result<[UniversalBleScanResult], Error>) -> Void) {
+    var filterCBUUID = withServices.map { CBUUID(string: $0) }
+    // We can't keep this filter empty, so adding a default filter
+    if filterCBUUID.isEmpty { filterCBUUID.append(CBUUID(string: "1800")) }
+    let bleDevices = manager.retrieveConnectedPeripherals(withServices: filterCBUUID)
+    bleDevices.forEach { discoveredPeripherals[$0.uuid.uuidString] = $0 }
+    completion(Result.success(bleDevices.map {
+      UniversalBleScanResult(
+        deviceId: $0.uuid.uuidString,
+        name: $0.name ?? ""
+      )
+    }))
+  }
+
+  func centralManagerDidUpdateState(_ central: CBCentralManager) {
+    let state = central.state.toAvailabilityState().rawValue
+    callbackChannel.onAvailabilityChanged(state: state) { _ in }
+
+    bluetoothAvailabilityStateCallback?(Result.success(state))
+  }
+
+  public func centralManager(_: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String: Any], rssi RSSI: NSNumber) {
+    discoveredPeripherals[peripheral.uuid.uuidString] = peripheral
+    let manufacturerData = advertisementData[CBAdvertisementDataManufacturerDataKey] as? Data
+    callbackChannel.onScanResult(result: UniversalBleScanResult(
+      deviceId: peripheral.uuid.uuidString,
+      name: peripheral.name,
+      isPaired: nil,
+      rssi: RSSI as? Int64,
+      manufacturerData: FlutterStandardTypedData(bytes: manufacturerData ?? Data())
+    )) { _ in }
+  }
+
+  public func centralManager(_: CBCentralManager, didConnect peripheral: CBPeripheral) {
+    callbackChannel.onConnectionChanged(deviceId: peripheral.uuid.uuidString, state: BlueConnectionState.connected.rawValue) { _ in }
+  }
+
+  public func centralManager(_: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error _: Error?) {
+    callbackChannel.onConnectionChanged(deviceId: peripheral.uuid.uuidString, state: BlueConnectionState.disconnected.rawValue) { _ in }
+  }
+
+  public func peripheral(_ peripheral: CBPeripheral, didDiscoverServices _: Error?) {
+    let deviceId = peripheral.identifier.uuidString
+    guard let services = peripheral.services else {
+      onServicesDiscovered(deviceId: deviceId, services: [])
+      return
+    }
+    discoveredServicesProgressMap[deviceId] = services.map { UniversalBleService(uuid: $0.uuid.uuidString, characteristics: nil) }
+    for service in services {
+      peripheral.discoverCharacteristics(nil, for: service)
+    }
+  }
+
+  public func peripheral(_ peripheral: CBPeripheral, didDiscoverCharacteristicsFor service: CBService, error _: Error?) {
+    let deviceId = peripheral.identifier.uuidString
+    var universalBleCharacteristicsList: [UniversalBleCharacteristic] = []
+    for characteristic in service.characteristics ?? [] {
+      universalBleCharacteristicsList.append(
+        UniversalBleCharacteristic(uuid: characteristic.uuid.uuidString, properties: characteristic.properties.toCharacteristicProperty))
+    }
+    // Update discoveredServicesProgressMap
+    if let index = discoveredServicesProgressMap[deviceId]?.firstIndex(where: { $0.uuid == service.uuid.uuidString }) {
+      discoveredServicesProgressMap[deviceId]?[index] = UniversalBleService(uuid: service.uuid.uuidString, characteristics: universalBleCharacteristicsList)
+    }
+    // Check if all services and their characteristics have been discovered
+    if discoveredServicesProgressMap[deviceId]?.allSatisfy({ $0.characteristics != nil }) ?? false {
+      onServicesDiscovered(deviceId: deviceId, services: discoveredServicesProgressMap[deviceId] ?? [])
+      discoveredServicesProgressMap[deviceId] = nil
+    }
+  }
+
+  public func peripheral(_ peripheral: CBPeripheral, didWriteValueFor characteristic: CBCharacteristic, error: Error?) {
+    print("peripheral:didWriteValueForCharacteristic \(characteristic.uuid.uuidStr) error: \(String(describing: error))")
+    // Update futures for writeValue
+    characteristicWriteFutures.removeAll { future in
+      if future.deviceId == peripheral.uuid.uuidString && future.characteristicId == characteristic.uuid.uuidStr && future.serviceId == characteristic.service?.uuid.uuidStr {
+        if error != nil {
+          future.result(Result.failure(FlutterError(code: "WriteFailed", message: String(describing: error), details: nil)))
+        } else {
+          future.result(Result.success({}()))
+        }
+        return true
+      }
+      return false
+    }
+  }
+
+  public func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) {
+    // Update callbackChannel if notifying
+    if characteristic.isNotifying {
+      if let characteristicValue = characteristic.value {
+        callbackChannel.onValueChanged(deviceId: peripheral.uuid.uuidString, characteristicId: characteristic.uuid.uuidStr, value: FlutterStandardTypedData(bytes: characteristicValue)) { _ in }
+      }
+    }
+
+    if characteristicReadFutures.count == 0 {
+      return
+    }
+
+    // Update futures for readValue
+    characteristicReadFutures.removeAll { future in
+      if future.deviceId == peripheral.uuid.uuidString && future.characteristicId == characteristic.uuid.uuidStr && future.serviceId == characteristic.service?.uuid.uuidStr {
+        if error != nil {
+          future.result(Result.failure(FlutterError(code: "ReadFailed", message: String(describing: error), details: nil)))
+        } else {
+          if let characteristicValue = characteristic.value {
+            future.result(Result.success(FlutterStandardTypedData(bytes: characteristicValue)))
+          } else {
+            future.result(Result.failure(FlutterError(code: "ReadFailed", message: "No value", details: nil)))
+          }
+        }
+        return true
+      }
+      return false
+    }
+  }
+}
+
+extension String {
+  func getPeripheral() throws -> CBPeripheral {
+    guard let peripheral = discoveredPeripherals[self] else {
+      throw FlutterError(code: "IllegalArgument", message: "Unknown deviceId:\(self)", details: nil)
+    }
+    return peripheral
+  }
+}
+
+extension FlutterError: Error {}

darwin/universal_ble.podspec

@@ -0,0 +1,25 @@
+#
+# To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html.
+# Run `pod lib lint universal_ble.podspec` to validate before publishing.
+#
+Pod::Spec.new do |s|
+  s.name             = 'universal_ble'
+  s.version          = '0.0.1'
+  s.summary          = 'A new Flutter plugin project.'
+  s.description      = <<-DESC
+A new Flutter plugin project.
+                       DESC
+  s.homepage         = 'http://example.com'
+  s.license          = { :file => '../LICENSE' }
+  s.author           = { 'Your Company' => 'email@example.com' }
+  s.source           = { :path => '.' }
+  s.source_files = 'Classes/**/*'
+  s.ios.dependency 'Flutter'
+  s.osx.dependency 'FlutterMacOS'
+  s.ios.deployment_target = '9.0'
+  s.osx.deployment_target = '10.12'
+
+  # Flutter.framework does not contain a i386 slice.
+  s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES', 'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386' }
+  s.swift_version = '5.0'
+end

example/.gitignore

@@ -0,0 +1,44 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+.packages
+.pub-cache/
+.pub/
+/build/
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release

example/.metadata

@@ -0,0 +1,30 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: "ead455963c12b453cdb2358cad34969c76daf180"
+  channel: "stable"
+
+project_type: app
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: ead455963c12b453cdb2358cad34969c76daf180
+      base_revision: ead455963c12b453cdb2358cad34969c76daf180
+    - platform: web
+      create_revision: ead455963c12b453cdb2358cad34969c76daf180
+      base_revision: ead455963c12b453cdb2358cad34969c76daf180
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'

example/README.md

@@ -0,0 +1,16 @@
+# universal_ble_example
+
+Demonstrates how to use the universal_ble plugin.
+
+## Getting Started
+
+This project is a starting point for a Flutter application.
+
+A few resources to get you started if this is your first Flutter project:
+
+- [Lab: Write your first Flutter app](https://docs.flutter.dev/get-started/codelab)
+- [Cookbook: Useful Flutter samples](https://docs.flutter.dev/cookbook)
+
+For help getting started with Flutter development, view the
+[online documentation](https://docs.flutter.dev/), which offers tutorials,
+samples, guidance on mobile development, and a full API reference.

example/analysis_options.yaml

@@ -0,0 +1,28 @@
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
+
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at https://dart.dev/lints.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options

example/android/.gitignore

@@ -0,0 +1,13 @@
+gradle-wrapper.jar
+/.gradle
+/captures/
+/gradlew
+/gradlew.bat
+/local.properties
+GeneratedPluginRegistrant.java
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app
+key.properties
+**/*.keystore
+**/*.jks

example/android/app/build.gradle

@@ -0,0 +1,67 @@
+plugins {
+    id "com.android.application"
+    id "kotlin-android"
+    id "dev.flutter.flutter-gradle-plugin"
+}
+
+def localProperties = new Properties()
+def localPropertiesFile = rootProject.file('local.properties')
+if (localPropertiesFile.exists()) {
+    localPropertiesFile.withReader('UTF-8') { reader ->
+        localProperties.load(reader)
+    }
+}
+
+def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
+if (flutterVersionCode == null) {
+    flutterVersionCode = '1'
+}
+
+def flutterVersionName = localProperties.getProperty('flutter.versionName')
+if (flutterVersionName == null) {
+    flutterVersionName = '1.0'
+}
+
+android {
+    namespace "com.navideck.universal_ble_example"
+    compileSdkVersion 34
+    ndkVersion flutter.ndkVersion
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
+    sourceSets {
+        main.java.srcDirs += 'src/main/kotlin'
+    }
+
+    defaultConfig {
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId "com.navideck.universal_ble_example"
+        // You can update the following values to match your application needs.
+        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
+        minSdkVersion 21
+        targetSdkVersion 34
+        versionCode flutterVersionCode.toInteger()
+        versionName flutterVersionName
+    }
+
+    buildTypes {
+        release {
+            // TODO: Add your own signing config for the release build.
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig signingConfigs.debug
+        }
+    }
+}
+
+flutter {
+    source '../..'
+}
+
+dependencies {}

example/android/app/src/debug/AndroidManifest.xml

@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

example/android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,38 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <uses-permission android:name="android.permission.BLUETOOTH_SCAN" android:usesPermissionFlags="neverForLocation" />
+    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" android:maxSdkVersion="30" />
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" android:maxSdkVersion="30" />
+
+    <application
+        android:label="universal_ble_example"
+        android:name="${applicationName}"
+        android:icon="@mipmap/ic_launcher">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:launchMode="singleTop"
+            android:theme="@style/LaunchTheme"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
+            android:hardwareAccelerated="true"
+            android:windowSoftInputMode="adjustResize">
+            <!-- Specifies an Android theme to apply to this Activity as soon as
+                 the Android process has started. This theme is visible to the user
+                 while the Flutter UI initializes. After that, this theme continues
+                 to determine the Window background behind the Flutter UI. -->
+            <meta-data
+              android:name="io.flutter.embedding.android.NormalTheme"
+              android:resource="@style/NormalTheme"
+              />
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+        <!-- Don't delete the meta-data below.
+             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
+        <meta-data
+            android:name="flutterEmbedding"
+            android:value="2" />
+    </application>
+</manifest>

example/android/app/src/main/kotlin/com/navideck/universal_ble_example/MainActivity.kt

@@ -0,0 +1,6 @@
+package com.navideck.universal_ble_example
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity: FlutterActivity() {
+}

example/android/app/src/main/res/drawable-v21/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="?android:colorBackground" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

example/android/app/src/main/res/drawable/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@android:color/white" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

example/android/app/src/main/res/values-night/styles.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

example/android/app/src/main/res/values/styles.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

example/android/app/src/profile/AndroidManifest.xml

@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

example/android/build.gradle

@@ -0,0 +1,31 @@
+buildscript {
+    ext.kotlin_version = '1.7.10'
+    repositories {
+        google()
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:7.3.0'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.buildDir = '../build'
+subprojects {
+    project.buildDir = "${rootProject.buildDir}/${project.name}"
+}
+subprojects {
+    project.evaluationDependsOn(':app')
+}
+
+tasks.register("clean", Delete) {
+    delete rootProject.buildDir
+}

example/android/gradle.properties

@@ -0,0 +1,3 @@
+org.gradle.jvmargs=-Xmx1536M
+android.useAndroidX=true
+android.enableJetifier=true

example/android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-all.zip

example/android/settings.gradle

@@ -0,0 +1,20 @@
+pluginManagement {
+    def flutterSdkPath = {
+        def properties = new Properties()
+        file("local.properties").withInputStream { properties.load(it) }
+        def flutterSdkPath = properties.getProperty("flutter.sdk")
+        assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
+        return flutterSdkPath
+    }
+    settings.ext.flutterSdkPath = flutterSdkPath()
+
+    includeBuild("${settings.ext.flutterSdkPath}/packages/flutter_tools/gradle")
+
+    plugins {
+        id "dev.flutter.flutter-gradle-plugin" version "1.0.0" apply false
+    }
+}
+
+include ":app"
+
+apply from: "${settings.ext.flutterSdkPath}/packages/flutter_tools/gradle/app_plugin_loader.gradle"

example/ios/.gitignore

@@ -0,0 +1,34 @@
+**/dgph
+*.mode1v3
+*.mode2v3
+*.moved-aside
+*.pbxuser
+*.perspectivev3
+**/*sync/
+.sconsign.dblite
+.tags*
+**/.vagrant/
+**/DerivedData/
+Icon?
+**/Pods/
+**/.symlinks/
+profile
+xcuserdata
+**/.generated/
+Flutter/App.framework
+Flutter/Flutter.framework
+Flutter/Flutter.podspec
+Flutter/Generated.xcconfig
+Flutter/ephemeral/
+Flutter/app.flx
+Flutter/app.zip
+Flutter/flutter_assets/
+Flutter/flutter_export_environment.sh
+ServiceDefinitions.json
+Runner/GeneratedPluginRegistrant.*
+
+# Exceptions to above rules.
+!default.mode1v3
+!default.mode2v3
+!default.pbxuser
+!default.perspectivev3

example/ios/Flutter/AppFrameworkInfo.plist

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>en</string>
+  <key>CFBundleExecutable</key>
+  <string>App</string>
+  <key>CFBundleIdentifier</key>
+  <string>io.flutter.flutter.app</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>App</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>1.0</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>1.0</string>
+  <key>MinimumOSVersion</key>
+  <string>11.0</string>
+</dict>
+</plist>

example/ios/Flutter/Debug.xcconfig

@@ -0,0 +1,2 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include "Generated.xcconfig"

example/ios/Flutter/Release.xcconfig

@@ -0,0 +1,2 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include "Generated.xcconfig"

example/ios/Podfile

@@ -0,0 +1,44 @@
+# Uncomment this line to define a global platform for your project
+# platform :ios, '11.0'
+
+# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
+ENV['COCOAPODS_DISABLE_STATS'] = 'true'
+
+project 'Runner', {
+  'Debug' => :debug,
+  'Profile' => :release,
+  'Release' => :release,
+}
+
+def flutter_root
+  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
+  unless File.exist?(generated_xcode_build_settings_path)
+    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
+  end
+
+  File.foreach(generated_xcode_build_settings_path) do |line|
+    matches = line.match(/FLUTTER_ROOT\=(.*)/)
+    return matches[1].strip if matches
+  end
+  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
+end
+
+require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
+
+flutter_ios_podfile_setup
+
+target 'Runner' do
+  use_frameworks!
+  use_modular_headers!
+
+  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
+  target 'RunnerTests' do
+    inherit! :search_paths
+  end
+end
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    flutter_additional_ios_build_settings(target)
+  end
+end

example/ios/Podfile.lock

@@ -0,0 +1,41 @@
+PODS:
+  - device_info_plus (0.0.1):
+    - Flutter
+  - Flutter (1.0.0)
+  - integration_test (0.0.1):
+    - Flutter
+  - permission_handler_apple (9.1.1):
+    - Flutter
+  - universal_ble (0.0.1):
+    - Flutter
+    - FlutterMacOS
+
+DEPENDENCIES:
+  - device_info_plus (from `.symlinks/plugins/device_info_plus/ios`)
+  - Flutter (from `Flutter`)
+  - integration_test (from `.symlinks/plugins/integration_test/ios`)
+  - permission_handler_apple (from `.symlinks/plugins/permission_handler_apple/ios`)
+  - universal_ble (from `.symlinks/plugins/universal_ble/darwin`)
+
+EXTERNAL SOURCES:
+  device_info_plus:
+    :path: ".symlinks/plugins/device_info_plus/ios"
+  Flutter:
+    :path: Flutter
+  integration_test:
+    :path: ".symlinks/plugins/integration_test/ios"
+  permission_handler_apple:
+    :path: ".symlinks/plugins/permission_handler_apple/ios"
+  universal_ble:
+    :path: ".symlinks/plugins/universal_ble/darwin"
+
+SPEC CHECKSUMS:
+  device_info_plus: c6fb39579d0f423935b0c9ce7ee2f44b71b9fce6
+  Flutter: f04841e97a9d0b0a8025694d0796dd46242b2854
+  integration_test: 13825b8a9334a850581300559b8839134b124670
+  permission_handler_apple: e76247795d700c14ea09e3a2d8855d41ee80a2e6
+  universal_ble: cf52a7b3fd2e7c14d6d7262e9fdadb72ab6b88a6
+
+PODFILE CHECKSUM: 70d9d25280d0dd177a5f637cdb0f0b0b12c6a189
+
+COCOAPODS: 1.14.3

example/ios/Runner.xcodeproj/project.pbxproj

@@ -0,0 +1,724 @@
+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 54;
+	objects = {
+
+/* Begin PBXBuildFile section */
+		1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */ = {isa = PBXBuildFile; fileRef = 1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */; };
+		331C808B294A63AB00263BE5 /* RunnerTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 331C807B294A618700263BE5 /* RunnerTests.swift */; };
+		3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */ = {isa = PBXBuildFile; fileRef = 3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */; };
+		3C020DDC565FF8D37F3235C5 /* Pods_Runner.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = E92536821956EA00892DD639 /* Pods_Runner.framework */; };
+		74858FAF1ED2DC5600515810 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 74858FAE1ED2DC5600515810 /* AppDelegate.swift */; };
+		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
+		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
+		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
+		B2742FE9E6C1C51A78D26865 /* Pods_RunnerTests.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 9AB88605F389EEED340E5872 /* Pods_RunnerTests.framework */; };
+/* End PBXBuildFile section */
+
+/* Begin PBXContainerItemProxy section */
+		331C8085294A63A400263BE5 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 97C146E61CF9000F007C117D /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 97C146ED1CF9000F007C117D;
+			remoteInfo = Runner;
+		};
+/* End PBXContainerItemProxy section */
+
+/* Begin PBXCopyFilesBuildPhase section */
+		9705A1C41CF9048500538489 /* Embed Frameworks */ = {
+			isa = PBXCopyFilesBuildPhase;
+			buildActionMask = 2147483647;
+			dstPath = "";
+			dstSubfolderSpec = 10;
+			files = (
+			);
+			name = "Embed Frameworks";
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXCopyFilesBuildPhase section */
+
+/* Begin PBXFileReference section */
+		0D9A3CA727A1375BDCCC70CF /* Pods-RunnerTests.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.release.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.release.xcconfig"; sourceTree = "<group>"; };
+		1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GeneratedPluginRegistrant.h; sourceTree = "<group>"; };
+		1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratedPluginRegistrant.m; sourceTree = "<group>"; };
+		30B9BF32CD25D1ECB8BB5DCA /* Pods-Runner.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.debug.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"; sourceTree = "<group>"; };
+		331C807B294A618700263BE5 /* RunnerTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RunnerTests.swift; sourceTree = "<group>"; };
+		331C8081294A63A400263BE5 /* RunnerTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = RunnerTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
+		3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = AppFrameworkInfo.plist; path = Flutter/AppFrameworkInfo.plist; sourceTree = "<group>"; };
+		411AF23EC127806AE083685B /* Pods-RunnerTests.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.debug.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.debug.xcconfig"; sourceTree = "<group>"; };
+		4414252E2351EBDB7761F83A /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
+		6CF659084054FE2807275A3A /* Pods-RunnerTests.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.profile.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.profile.xcconfig"; sourceTree = "<group>"; };
+		74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "Runner-Bridging-Header.h"; sourceTree = "<group>"; };
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+				GENERATE_INFOPLIST_FILE = YES;
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = com.navideck.universalBleExample.RunnerTests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Runner.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/Runner";
+			};
+			name = Profile;
+		};
+		97C147031CF9000F007C117D /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = dwarf;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_DYNAMIC_NO_PIC = NO;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_OPTIMIZATION_LEVEL = 0;
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"DEBUG=1",
+					"$(inherited)",
+				);
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
+				MTL_ENABLE_DEBUG_INFO = YES;
+				ONLY_ACTIVE_ARCH = YES;
+				SDKROOT = iphoneos;
+				TARGETED_DEVICE_FAMILY = "1,2";
+			};
+			name = Debug;
+		};
+		97C147041CF9000F007C117D /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				ENABLE_NS_ASSERTIONS = NO;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				SDKROOT = iphoneos;
+				SUPPORTED_PLATFORMS = iphoneos;
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
+				TARGETED_DEVICE_FAMILY = "1,2";
+				VALIDATE_PRODUCT = YES;
+			};
+			name = Release;
+		};
+		97C147061CF9000F007C117D /* Debug */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 9740EEB21CF90195004384FC /* Debug.xcconfig */;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CLANG_ENABLE_MODULES = YES;
+				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				DEVELOPMENT_TEAM = QQAZR43YM7;
+				ENABLE_BITCODE = NO;
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.navideck.universalBleExample;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
+				VERSIONING_SYSTEM = "apple-generic";
+			};
+			name = Debug;
+		};
+		97C147071CF9000F007C117D /* Release */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CLANG_ENABLE_MODULES = YES;
+				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				DEVELOPMENT_TEAM = QQAZR43YM7;
+				ENABLE_BITCODE = NO;
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.navideck.universalBleExample;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
+				SWIFT_VERSION = 5.0;
+				VERSIONING_SYSTEM = "apple-generic";
+			};
+			name = Release;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		331C8087294A63A400263BE5 /* Build configuration list for PBXNativeTarget "RunnerTests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				331C8088294A63A400263BE5 /* Debug */,
+				331C8089294A63A400263BE5 /* Release */,
+				331C808A294A63A400263BE5 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		97C146E91CF9000F007C117D /* Build configuration list for PBXProject "Runner" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				97C147031CF9000F007C117D /* Debug */,
+				97C147041CF9000F007C117D /* Release */,
+				249021D3217E4FDB00AE95B9 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				97C147061CF9000F007C117D /* Debug */,
+				97C147071CF9000F007C117D /* Release */,
+				249021D4217E4FDB00AE95B9 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = 97C146E61CF9000F007C117D /* Project object */;
+}

example/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>

example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>

example/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme

@@ -0,0 +1,98 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1430"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+               BuildableName = "Runner.app"
+               BlueprintName = "Runner"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <Testables>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "331C8080294A63A400263BE5"
+               BuildableName = "RunnerTests.xctest"
+               BlueprintName = "RunnerTests"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Profile"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

example/ios/Runner.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:Runner.xcodeproj">
+   </FileRef>
+   <FileRef
+      location = "group:Pods/Pods.xcodeproj">
+   </FileRef>
+</Workspace>

example/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

example/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>

example/ios/Runner/AppDelegate.swift

@@ -0,0 +1,13 @@
+import UIKit
+import Flutter
+
+@UIApplicationMain
+@objc class AppDelegate: FlutterAppDelegate {
+  override func application(
+    _ application: UIApplication,
+    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
+  ) -> Bool {
+    GeneratedPluginRegistrant.register(with: self)
+    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
+  }
+}

example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,122 @@
+{
+  "images" : [
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-20x20@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-20x20@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-40x40@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-40x40@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-60x60@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-60x60@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-20x20@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-20x20@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-29x29@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-29x29@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-40x40@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-40x40@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-76x76@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-76x76@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "83.5x83.5",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-83.5x83.5@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "1024x1024",
+      "idiom" : "ios-marketing",
+      "filename" : "Icon-App-1024x1024@1x.png",
+      "scale" : "1x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

example/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage@3x.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

example/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md

@@ -0,0 +1,5 @@
+# Launch Screen Assets
+
+You can customize the launch screen with your own desired assets by replacing the image files in this directory.
+
+You can also do it by opening your Flutter project's Xcode project with `open ios/Runner.xcworkspace`, selecting `Runner/Assets.xcassets` in the Project Navigator and dropping in the desired images.

example/ios/Runner/Base.lproj/LaunchScreen.storyboard

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12121" systemVersion="16G29" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12089"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="EHf-IW-A2E">
+            <objects>
+                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="Ydg-fD-yQy"/>
+                        <viewControllerLayoutGuide type="bottom" id="xbc-2k-c8Z"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <imageView opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" image="LaunchImage" translatesAutoresizingMaskIntoConstraints="NO" id="YRO-k0-Ey4">
+                            </imageView>
+                        </subviews>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="centerX" secondItem="Ze5-6b-2t3" secondAttribute="centerX" id="1a2-6s-vTC"/>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="centerY" secondItem="Ze5-6b-2t3" secondAttribute="centerY" id="4X2-HB-R7a"/>
+                        </constraints>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="53" y="375"/>
+        </scene>
+    </scenes>
+    <resources>
+        <image name="LaunchImage" width="168" height="185"/>
+    </resources>
+</document>

example/ios/Runner/Base.lproj/Main.storyboard

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10117" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10085"/>
+    </dependencies>
+    <scenes>
+        <!--Flutter View Controller-->
+        <scene sceneID="tne-QT-ifu">
+            <objects>
+                <viewController id="BYZ-38-t0r" customClass="FlutterViewController" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
+                        <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
+                        <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
+            </objects>
+        </scene>
+    </scenes>
+</document>

example/ios/Runner/Info.plist

@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleDisplayName</key>
+	<string>Universal Ble</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>universal_ble_example</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>$(FLUTTER_BUILD_NAME)</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>$(FLUTTER_BUILD_NUMBER)</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
+	<key>UIMainStoryboardFile</key>
+	<string>Main</string>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>CADisableMinimumFrameDurationOnPhone</key>
+	<true/>
+	<key>UIApplicationSupportsIndirectInputEvents</key>
+	<true/>
+	<key>NSBluetoothAlwaysUsageDescription</key>
+	<string>example</string>
+	<key>NSBluetoothPeripheralUsageDescription</key>
+	<string>example</string>
+</dict>
+</plist>

example/ios/Runner/Runner-Bridging-Header.h

@@ -0,0 +1 @@
+#import "GeneratedPluginRegistrant.h"

example/ios/RunnerTests/RunnerTests.swift

@@ -0,0 +1,26 @@
+import Flutter
+import UIKit
+import XCTest
+
+@testable import universal_ble
+
+// This demonstrates a simple unit test of the Swift portion of this plugin's implementation.
+//
+// See https://developer.apple.com/documentation/xctest for more information about using XCTest.
+
+class RunnerTests: XCTestCase {
+
+  func testGetPlatformVersion() {
+    let plugin = UniversalBlePlugin()
+
+    let call = FlutterMethodCall(methodName: "getPlatformVersion", arguments: [])
+
+    let resultExpectation = expectation(description: "result block must be called.")
+    plugin.handle(call) { result in
+      XCTAssertEqual(result as! String, "iOS " + UIDevice.current.systemVersion)
+      resultExpectation.fulfill()
+    }
+    waitForExpectations(timeout: 1)
+  }
+
+}

example/lib/main.dart

@@ -0,0 +1,303 @@
+// ignore_for_file: use_build_context_synchronously, avoid_print
+
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:universal_ble/universal_ble.dart';
+import 'package:universal_ble_example/peripheral_detail_page.dart';
+import 'package:universal_ble_example/permission_validator.dart';
+
+// Run with auto connect to : auto Scan , FindDevice, Connect, DiscoverServices
+const autoConnect = bool.fromEnvironment('AUTO_CONNECT', defaultValue: false);
+const deviceIdToConnect = "50:e9:f1:c2:5e:2e";
+const deviceNameFilterForAutoConnect = "MyDevice";
+const primaryColor = Colors.blue;
+
+void main() {
+  runApp(
+    const MaterialApp(
+      debugShowCheckedModeBanner: false,
+      home: MyApp(),
+    ),
+  );
+}
+
+class MyApp extends StatefulWidget {
+  const MyApp({Key? key}) : super(key: key);
+
+  @override
+  State createState() => _MyAppState();
+}
+
+class _MyAppState extends State<MyApp> {
+  StreamSubscription<BleScanResult>? _subscription;
+  final _scanResults = <BleScanResult>[];
+  AvailabilityState? bleAvailabilityState;
+
+  List<String> services = [
+    "00001800-0000-1000-8000-00805f9b34fb",
+    "00002a00-0000-1000-8000-00805f9b34fb",
+    "00002a01-0000-1000-8000-00805f9b34fb",
+    "00002a19-0000-1000-8000-00805f9b34fb",
+    "8000cc00-cc00-ffff-ffff-ffffffffffff",
+    "8000dd00-dd00-ffff-ffff-ffffffffffff",
+  ];
+
+  // Set the web request options with the required services
+  get requestOptions =>
+      WebRequestOptionsBuilder.acceptAllDevices(optionalServices: services);
+
+  void initialize() {
+    UniversalBle.getBluetoothAvailabilityState().then((value) {
+      print("GetBluetoothAvailabilityState: ${value.name}");
+      setState(() {
+        bleAvailabilityState = value;
+      });
+    });
+
+    UniversalBle.onAvailabilityChange = (state) {
+      print("OnAvailabilityChange: ${state.name}");
+      setState(() {
+        bleAvailabilityState = state;
+      });
+    };
+
+    if (autoConnect) {
+      UniversalBle.startScan(webRequestOptions: requestOptions);
+    }
+
+    UniversalBle.onScanResult = (result) {
+      if (!_scanResults.any((r) => r.deviceId == result.deviceId)) {
+        setState(() => _scanResults.add(result));
+      } else {
+        setState(() {
+          int index = _scanResults
+              .indexWhere((element) => element.deviceId == result.deviceId);
+          if (result.name == null && _scanResults[index].name != null) {
+            result.name = _scanResults[index].name;
+          }
+          _scanResults[index] = result;
+        });
+      }
+      if (autoConnect &&
+          (result.deviceId == deviceIdToConnect ||
+              (result.name?.contains(deviceNameFilterForAutoConnect) ==
+                  true))) {
+        print("Auto connecting to ${result.deviceId}");
+        UniversalBle.stopScan();
+        Navigator.push(
+            context,
+            MaterialPageRoute(
+              builder: (context) => PeripheralDetailPage(result.deviceId, true),
+            ));
+      }
+    };
+  }
+
+  @override
+  void initState() {
+    super.initState();
+
+    initialize();
+  }
+
+  @override
+  void dispose() {
+    super.dispose();
+    _subscription?.cancel();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('Universal Ble'),
+      ),
+      body: Column(
+        children: [
+          _buildButtons(),
+          const Divider(
+            color: Colors.blue,
+          ),
+          _scanResults.isEmpty
+              ? const Expanded(
+                  child: Column(
+                    mainAxisAlignment: MainAxisAlignment.center,
+                    children: [
+                      Padding(
+                        padding: EdgeInsets.all(8.0),
+                        child: Icon(
+                          Icons.bluetooth,
+                          color: Colors.grey,
+                          size: 100,
+                        ),
+                      ),
+                      Text(
+                        'Scan For Devices',
+                        style: TextStyle(color: Colors.grey, fontSize: 22),
+                      )
+                    ],
+                  ),
+                )
+              : _buildListView(),
+        ],
+      ),
+    );
+  }
+
+  Widget _buildButtons() {
+    return Column(
+      children: [
+        Padding(
+          padding: const EdgeInsets.all(8.0),
+          child: LayoutBuilder(builder: (context, constraints) {
+            const tileWidth = 150;
+            const tileHeight = 500;
+            final count = constraints.maxWidth ~/ tileWidth;
+            return GridView.count(
+              crossAxisCount: count,
+              crossAxisSpacing: 8,
+              mainAxisSpacing: 8,
+              childAspectRatio: tileHeight / tileWidth,
+              shrinkWrap: true,
+              physics: const NeverScrollableScrollPhysics(),
+              children: [
+                ElevatedButton(
+                  child: const Text('Enable Bluetooth'),
+                  onPressed: () async {
+                    bool isEnabled = await UniversalBle.enableBluetooth();
+                    ScaffoldMessenger.of(context).showSnackBar(
+                      SnackBar(
+                        content: Text("BluetoothEnabled: $isEnabled"),
+                      ),
+                    );
+                  },
+                ),
+                ElevatedButton(
+                  child: const Text('Permissions'),
+                  onPressed: () async {
+                    bool hasPermissions =
+                        await Validator.arePermissionsGranted();
+                    if (hasPermissions) {
+                      ScaffoldMessenger.of(context).showSnackBar(
+                        const SnackBar(
+                          content: Text("Permissions already granted"),
+                        ),
+                      );
+                    }
+                  },
+                ),
+                ElevatedButton(
+                  child: const Text('Start Scan'),
+                  onPressed: () {
+                    setState(() {
+                      _scanResults.clear();
+                    });
+                    UniversalBle.startScan(webRequestOptions: requestOptions);
+                  },
+                ),
+                ElevatedButton(
+                  child: const Text('Stop Scan'),
+                  onPressed: () {
+                    UniversalBle.stopScan();
+                  },
+                ),
+                ElevatedButton(
+                  child: const Text('Connected Devices'),
+                  onPressed: () async {
+                    var devices = await UniversalBle.getConnectedDevices(
+                      withServices: services,
+                    );
+                    if (devices.isEmpty) {
+                      ScaffoldMessenger.of(context).showSnackBar(
+                        const SnackBar(
+                          content: Text("No Connected Devices Found"),
+                        ),
+                      );
+                    }
+                    // print(devices.map((e) => e.toJson()));
+                    setState(() {
+                      _scanResults.clear();
+                      _scanResults.addAll(devices);
+                    });
+                  },
+                ),
+              ],
+            );
+          }),
+        ),
+        Row(
+          mainAxisAlignment: MainAxisAlignment.spaceBetween,
+          children: [
+            Padding(
+              padding: const EdgeInsets.all(8.0),
+              child: Text(
+                'Ble Availability : ${bleAvailabilityState?.name}',
+              ),
+            ),
+            IconButton(
+                onPressed: () {
+                  setState(() {
+                    _scanResults.clear();
+                  });
+                },
+                icon: const Icon(Icons.close_rounded)),
+          ],
+        ),
+      ],
+    );
+  }
+
+  Widget _buildListView() {
+    return Expanded(
+      child: ListView.separated(
+        itemBuilder: (context, index) {
+          var scanResult = _scanResults[index];
+          String? name = scanResult.name;
+          if (name == null || name.isEmpty) {
+            name = 'NA';
+          }
+          return Padding(
+            padding: const EdgeInsets.symmetric(horizontal: 8.0),
+            child: Card(
+              child: ListTile(
+                title: Text(
+                  '$name (${scanResult.rssi})',
+                ),
+                subtitle: scanResult.isPaired != null
+                    ? Column(
+                        crossAxisAlignment: CrossAxisAlignment.start,
+                        children: [
+                          Text("${scanResult.deviceId} "),
+                          scanResult.isPaired == true
+                              ? const Text(
+                                  "Paired",
+                                  style: TextStyle(color: Colors.green),
+                                )
+                              : const Text(
+                                  "Not Paired",
+                                  style: TextStyle(color: Colors.red),
+                                ),
+                        ],
+                      )
+                    : Text(scanResult.deviceId),
+                trailing: const Icon(Icons.arrow_forward_ios),
+                onTap: () {
+                  print("$name: ${scanResult.deviceId}");
+                  Navigator.push(
+                      context,
+                      MaterialPageRoute(
+                        builder: (context) =>
+                            PeripheralDetailPage(scanResult.deviceId, false),
+                      ));
+                },
+              ),
+            ),
+          );
+        },
+        separatorBuilder: (context, index) => const Divider(),
+        itemCount: _scanResults.length,
+      ),
+    );
+  }
+}

example/lib/peripheral_detail_page.dart

@@ -0,0 +1,662 @@
+// ignore_for_file: avoid_print, depend_on_referenced_packages
+
+import 'dart:convert';
+
+import 'package:convert/convert.dart';
+import 'package:expandable/expandable.dart';
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:universal_ble/universal_ble.dart';
+import 'package:universal_ble_example/main.dart';
+
+String gssUuid(String code) => '0000$code-0000-1000-8000-00805f9b34fb';
+
+class PeripheralDetailPage extends StatefulWidget {
+  final String deviceId;
+  final bool autoConnect;
+  const PeripheralDetailPage(this.deviceId, this.autoConnect, {Key? key})
+      : super(key: key);
+
+  @override
+  State<StatefulWidget> createState() {
+    return _PeripheralDetailPageState();
+  }
+}
+
+class _PeripheralDetailPageState extends State<PeripheralDetailPage> {
+  bool isConnected = false;
+  bool parseValue = true;
+  GlobalKey<FormState> uuidFormKey = GlobalKey<FormState>();
+  GlobalKey<FormState> valueFormKey = GlobalKey<FormState>();
+
+  List<BleService> discoveredServices = [];
+  ExpandableController expandableController =
+      ExpandableController(initialExpanded: autoConnect);
+  List<String> results = [];
+
+  @override
+  void initState() {
+    super.initState();
+    UniversalBle.onConnectionChanged = _handleConnectionChange;
+    UniversalBle.onValueChanged = _handleValueChange;
+    UniversalBle.onPairStateChange =
+        (String deviceId, bool isPaired, String? error) {
+      print('OnPairStateChange $deviceId, $isPaired');
+      setState(() {
+        if (error != null) {
+          results.add("PairStateChangeError (Paired: $isPaired): $error ");
+        } else {
+          results.add('PairStateChange: $isPaired');
+        }
+      });
+    };
+
+    if (autoConnect) {
+      UniversalBle.connect(widget.deviceId);
+    }
+  }
+
+  @override
+  void dispose() {
+    super.dispose();
+    UniversalBle.onConnectionChanged = null;
+    UniversalBle.onValueChanged = null;
+
+    // Disconnect when leaving the page
+    if (isConnected) UniversalBle.disconnect(widget.deviceId);
+  }
+
+  void _handleConnectionChange(String deviceId, BleConnectionState state) {
+    print('_handleConnectionChange $deviceId, ${state.name}');
+    setState(() {
+      if (deviceId == widget.deviceId) {
+        isConnected = (state == BleConnectionState.connected);
+      }
+      results.add('Connection: ${state.name.toUpperCase()}');
+    });
+
+    // Auto Discover Services
+    if (isConnected) {
+      discoverServices();
+    } else if (autoConnect && !isConnected) {
+      print("Trying to reconnect");
+      UniversalBle.connect(widget.deviceId);
+    }
+  }
+
+  void discoverServices() async {
+    var services = await UniversalBle.discoverServices(widget.deviceId);
+    print('${services.length} services discovered');
+    discoveredServices.clear();
+    setState(() {
+      discoveredServices = services;
+    });
+  }
+
+  void _handleValueChange(
+      String deviceId, String characteristicId, Uint8List value) {
+    String s = String.fromCharCodes(value);
+    String data =
+        parseValue ? '$s\nraw :  ${value.toString()}' : value.toString();
+    print('_handleValueChange $deviceId, $characteristicId, $s');
+    setState(() {
+      results.add("Value: $data");
+    });
+  }
+
+  Uint8List? _getWriteValue() {
+    if (!uuidFormKey.currentState!.validate() ||
+        !valueFormKey.currentState!.validate()) {
+      return null;
+    }
+
+    if (binaryCode.text.isEmpty) {
+      print("Error: No value to write");
+      return null;
+    }
+    List<int>? value;
+    String text = binaryCode.text;
+    if (text.contains(",") || text.contains("[") || text.contains("]")) {
+      text = text.replaceAll("[", "").replaceAll("]", "").trim();
+      value = text.split(',').map(int.parse).toList();
+    } else {
+      try {
+        value = hex.decode(text);
+      } catch (e) {
+        print("Error parsing hex $e");
+        print("Trying utf8 encoding");
+        value = utf8.encode(text);
+      }
+    }
+    return Uint8List.fromList(value);
+  }
+
+  final serviceUUID = TextEditingController();
+  final characteristicUUID = TextEditingController();
+  final binaryCode = TextEditingController();
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('Peripheral Details'),
+        actions: [
+          Padding(
+            padding: const EdgeInsets.all(8.0),
+            child: Icon(
+              Icons.circle,
+              color: isConnected ? Colors.greenAccent : Colors.red,
+              size: 20,
+            ),
+          )
+        ],
+      ),
+      body: LayoutBuilder(builder: (context, constraints) {
+        bool isDesktop = constraints.maxWidth > 1000;
+        return Row(
+          children: [
+            if (isDesktop)
+              Expanded(
+                flex: 1,
+                child: Container(
+                  color: Colors.grey[300],
+                  child: discoveredServices.isEmpty
+                      ? const Center(
+                          child: Text('No Services Discovered'),
+                        )
+                      : ServicesView(
+                          discoveredServices: discoveredServices,
+                          scrollable: true,
+                          onTap: (BleService service,
+                              BleCharacteristic characteristic) {
+                            serviceUUID.text = service.uuid;
+                            characteristicUUID.text = characteristic.uuid;
+                            print(
+                              characteristic.properties.map((e) => e.name),
+                            );
+                          },
+                        ),
+                ),
+              ),
+            Expanded(
+              flex: 3,
+              child: Align(
+                alignment: Alignment.topCenter,
+                child: SingleChildScrollView(
+                  child: Form(
+                    key: uuidFormKey,
+                    child: Column(
+                      children: [
+                        // Top buttons
+                        Padding(
+                          padding: const EdgeInsets.all(8.0),
+                          child: Row(
+                            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+                            children: <Widget>[
+                              PlatformButton(
+                                text: 'Connect',
+                                enabled: !isConnected,
+                                onPressed: () async {
+                                  try {
+                                    await UniversalBle.connect(widget.deviceId);
+                                  } catch (e) {
+                                    print(e);
+                                    setState(() {
+                                      results.add('ConnectError : $e');
+                                    });
+                                  }
+                                },
+                              ),
+                              PlatformButton(
+                                text: 'Disconnect',
+                                enabled: isConnected,
+                                onPressed: () {
+                                  UniversalBle.disconnect(widget.deviceId);
+                                },
+                              ),
+                            ],
+                          ),
+                        ),
+                        const Divider(),
+
+                        // Text Fields
+                        Padding(
+                          padding: const EdgeInsets.all(8.0),
+                          child: TextFormField(
+                            controller: serviceUUID,
+                            validator: (value) {
+                              if (value == null || value.isEmpty) {
+                                return 'Please enter a service uuid';
+                              }
+                              return null;
+                            },
+                            decoration: const InputDecoration(
+                              labelText: 'ServiceUUID',
+                              border: OutlineInputBorder(),
+                            ),
+                          ),
+                        ),
+                        Padding(
+                          padding: const EdgeInsets.all(8.0),
+                          child: TextFormField(
+                            controller: characteristicUUID,
+                            validator: (value) {
+                              if (value == null || value.isEmpty) {
+                                return 'Please enter a Characteristic uuid';
+                              }
+                              return null;
+                            },
+                            decoration: const InputDecoration(
+                              labelText: 'CharacteristicUUID',
+                              border: OutlineInputBorder(),
+                            ),
+                          ),
+                        ),
+
+                        Form(
+                          key: valueFormKey,
+                          child: Padding(
+                            padding: const EdgeInsets.all(8.0),
+                            child: Row(
+                              children: [
+                                Expanded(
+                                  flex: 5,
+                                  child: TextFormField(
+                                    controller: binaryCode,
+                                    validator: (value) {
+                                      if (value == null || value.isEmpty) {
+                                        return 'Please enter a value';
+                                      }
+                                      return null;
+                                    },
+                                    decoration: const InputDecoration(
+                                      labelText: 'Enter Value ',
+                                      hintText:
+                                          "Enter Value (String, Hex or List<int>)",
+                                      border: OutlineInputBorder(),
+                                    ),
+                                  ),
+                                ),
+                                Switch(
+                                    value: parseValue,
+                                    onChanged: (value) {
+                                      setState(() {
+                                        parseValue = value;
+                                      });
+                                    }),
+                              ],
+                            ),
+                          ),
+                        ),
+
+                        const Divider(),
+
+                        // Buttons
+                        Padding(
+                          padding: const EdgeInsets.all(8.0),
+                          child: LayoutBuilder(builder: (context, constraints) {
+                            const tileWidth = 150;
+                            const tileHeight = 500;
+                            final count = constraints.maxWidth ~/ tileWidth;
+                            return GridView.count(
+                              crossAxisCount: count,
+                              crossAxisSpacing: 8,
+                              mainAxisSpacing: 8,
+                              childAspectRatio: tileHeight / tileWidth,
+                              shrinkWrap: true,
+                              physics: const NeverScrollableScrollPhysics(),
+                              children: [
+                                PlatformButton(
+                                  enabled: isConnected,
+                                  onPressed: () {
+                                    Uint8List? value = _getWriteValue();
+                                    if (value == null) return;
+                                    print("Writing $value");
+                                    UniversalBle.writeValue(
+                                        widget.deviceId,
+                                        serviceUUID.text,
+                                        characteristicUUID.text,
+                                        value,
+                                        BleOutputProperty.withResponse);
+                                  },
+                                  text: 'Write',
+                                ),
+                                PlatformButton(
+                                  enabled: isConnected,
+                                  onPressed: () async {
+                                    if (!uuidFormKey.currentState!.validate()) {
+                                      return;
+                                    }
+                                    try {
+                                      Uint8List value =
+                                          await UniversalBle.readValue(
+                                              widget.deviceId,
+                                              serviceUUID.text,
+                                              characteristicUUID.text);
+                                      String s = String.fromCharCodes(value);
+                                      String data = parseValue
+                                          ? '$s\nraw :  ${value.toString()}'
+                                          : value.toString();
+                                      setState(() {
+                                        results.add('Read : $data');
+                                      });
+                                    } catch (e) {
+                                      print(e);
+                                      setState(() {
+                                        results.add('ReadError : $e');
+                                      });
+                                    }
+                                  },
+                                  text: 'Read',
+                                ),
+                                PlatformButton(
+                                  enabled: isConnected,
+                                  onPressed: () async {
+                                    int mtu = await UniversalBle.requestMtu(
+                                        widget.deviceId, 247);
+                                    setState(() {
+                                      results.add('MTU : $mtu');
+                                    });
+                                  },
+                                  text: 'Request Mtu',
+                                ),
+                                PlatformButton(
+                                  enabled: isConnected,
+                                  onPressed: () {
+                                    if (!uuidFormKey.currentState!.validate()) {
+                                      return;
+                                    }
+                                    BleCharacteristic? characteristic;
+
+                                    for (BleService service
+                                        in discoveredServices) {
+                                      for (BleCharacteristic c
+                                          in service.characteristics) {
+                                        if (c.uuid == characteristicUUID.text) {
+                                          characteristic = c;
+                                          break;
+                                        }
+                                      }
+                                    }
+                                    BleInputProperty inputProperty =
+                                        BleInputProperty.notification;
+                                    if (characteristic != null) {
+                                      if (characteristic.properties.contains(
+                                          CharacteristicProperty.indicate)) {
+                                        inputProperty =
+                                            BleInputProperty.indication;
+                                      } else if (characteristic.properties
+                                          .contains(
+                                              CharacteristicProperty.notify)) {
+                                        inputProperty =
+                                            BleInputProperty.notification;
+                                      } else {
+                                        print('No notify or indicate property');
+                                        return;
+                                      }
+                                    }
+                                    print(inputProperty);
+                                    UniversalBle.setNotifiable(
+                                      widget.deviceId,
+                                      serviceUUID.text,
+                                      characteristicUUID.text,
+                                      inputProperty,
+                                    );
+                                  },
+                                  text: 'Notify/Indicate',
+                                ),
+                                PlatformButton(
+                                  enabled: isConnected,
+                                  onPressed: () {
+                                    if (!uuidFormKey.currentState!.validate()) {
+                                      return;
+                                    }
+                                    UniversalBle.setNotifiable(
+                                      widget.deviceId,
+                                      serviceUUID.text,
+                                      characteristicUUID.text,
+                                      BleInputProperty.disabled,
+                                    );
+                                  },
+                                  text: 'Cancel Notify',
+                                ),
+                                PlatformButton(
+                                  onPressed: () async {
+                                    discoverServices();
+                                  },
+                                  enabled: isConnected,
+                                  text: 'Discover Services',
+                                ),
+                                PlatformButton(
+                                  onPressed: () async {
+                                    await UniversalBle.pair(widget.deviceId);
+                                  },
+                                  text: 'Pair',
+                                ),
+                                PlatformButton(
+                                  onPressed: () async {
+                                    bool isPaired = await UniversalBle.isPaired(
+                                        widget.deviceId);
+                                    setState(() {
+                                      results.add('IsPaired : $isPaired');
+                                    });
+                                  },
+                                  text: 'IsPaired',
+                                ),
+                                PlatformButton(
+                                  onPressed: () async {
+                                    await UniversalBle.unPair(widget.deviceId);
+                                  },
+                                  text: 'UnPair',
+                                ),
+                                PlatformButton(
+                                  onPressed: () async {
+                                    setState(() {
+                                      results.clear();
+                                      discoveredServices.clear();
+                                    });
+                                  },
+                                  text: 'Clear',
+                                ),
+                              ],
+                            );
+                          }),
+                        ),
+
+                        // Results , Services
+                        if (!isDesktop)
+                          Column(
+                            children: [
+                              ResultView(
+                                  results: results,
+                                  onClearTap: (int? index) {
+                                    setState(() {
+                                      if (index != null) {
+                                        results.removeAt(index);
+                                      } else {
+                                        results.clear();
+                                      }
+                                    });
+                                  }),
+                              const Divider(),
+                              ServicesView(
+                                discoveredServices: discoveredServices,
+                                onTap: (BleService service,
+                                    BleCharacteristic characteristic) {
+                                  serviceUUID.text = service.uuid;
+                                  characteristicUUID.text = characteristic.uuid;
+                                  print(
+                                    characteristic.properties
+                                        .map((e) => e.name),
+                                  );
+                                },
+                              ),
+                            ],
+                          )
+                      ],
+                    ),
+                  ),
+                ),
+              ),
+            ),
+
+            // For Desktop
+            if (isDesktop)
+              Expanded(
+                  flex: 1,
+                  child: Container(
+                    color: Colors.grey[300],
+                    child: results.isEmpty
+                        ? const Center(
+                            child: Text('No results'),
+                          )
+                        : ResultView(
+                            results: results,
+                            scrollable: true,
+                            onClearTap: (int? index) {
+                              setState(() {
+                                if (index != null) {
+                                  results.removeAt(index);
+                                } else {
+                                  results.clear();
+                                }
+                              });
+                            }),
+                  )),
+          ],
+        );
+      }),
+    );
+  }
+}
+
+class ResultView extends StatelessWidget {
+  final List<String> results;
+  final bool scrollable;
+  final Function(int? index) onClearTap;
+  const ResultView({
+    required this.results,
+    required this.onClearTap,
+    this.scrollable = false,
+    super.key,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return ListView.builder(
+      shrinkWrap: !scrollable,
+      physics: scrollable ? null : const NeverScrollableScrollPhysics(),
+      itemCount: results.length,
+      itemBuilder: (BuildContext context, int index) {
+        return Padding(
+          padding: const EdgeInsets.all(8.0),
+          child: Card(
+            child: ListTile(
+              onTap: () {
+                onClearTap(index);
+              },
+              title: Text(results[index]),
+              trailing: const Icon(Icons.clear),
+            ),
+          ),
+        );
+      },
+    );
+  }
+}
+
+class ServicesView extends StatelessWidget {
+  final List<BleService> discoveredServices;
+  final bool scrollable;
+
+  final Function(BleService service, BleCharacteristic characteristic)? onTap;
+  const ServicesView({
+    super.key,
+    required this.discoveredServices,
+    this.onTap,
+    this.scrollable = false,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return ListView.builder(
+      shrinkWrap: !scrollable,
+      physics: scrollable ? null : const NeverScrollableScrollPhysics(),
+      itemCount: discoveredServices.length,
+      itemBuilder: (BuildContext context, int index) {
+        return Padding(
+          padding: const EdgeInsets.all(8.0),
+          child: Card(
+            child: ExpandablePanel(
+              header: Container(
+                color: scrollable ? Colors.lime : Colors.grey[300],
+                child: Padding(
+                  padding: const EdgeInsets.all(8.0),
+                  child: Row(
+                    children: [
+                      const Icon(Icons.arrow_forward_ios),
+                      Expanded(child: Text(discoveredServices[index].uuid)),
+                    ],
+                  ),
+                ),
+              ),
+              collapsed: const SizedBox(),
+              expanded: Column(
+                children: discoveredServices[index]
+                    .characteristics
+                    .map((e) => Padding(
+                          padding: const EdgeInsets.all(8.0),
+                          child: Column(
+                            crossAxisAlignment: CrossAxisAlignment.start,
+                            children: [
+                              InkWell(
+                                onTap: () {
+                                  onTap?.call(discoveredServices[index], e);
+                                },
+                                child: Column(
+                                  crossAxisAlignment: CrossAxisAlignment.start,
+                                  children: [
+                                    Row(
+                                      children: [
+                                        const Icon(Icons.arrow_right_outlined),
+                                        Expanded(child: Text(e.uuid)),
+                                      ],
+                                    ),
+                                    Text(
+                                      "Properties: ${e.properties.map((e) => e.name)}",
+                                    )
+                                  ],
+                                ),
+                              ),
+                            ],
+                          ),
+                        ))
+                    .toList(),
+              ),
+            ),
+          ),
+        );
+      },
+    );
+  }
+}
+
+class PlatformButton extends StatelessWidget {
+  final String text;
+  final Function()? onPressed;
+  final bool enabled;
+  const PlatformButton({
+    required this.text,
+    required this.onPressed,
+    this.enabled = true,
+    super.key,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return ElevatedButton(
+      onPressed: enabled ? onPressed : null,
+      child: Text(text),
+    );
+  }
+}

example/lib/permission_validator.dart

@@ -0,0 +1,102 @@
+// ignore_for_file: avoid_print
+
+import 'dart:async';
+import 'dart:io';
+
+import 'package:device_info_plus/device_info_plus.dart';
+import 'package:flutter/foundation.dart';
+import 'package:permission_handler/permission_handler.dart';
+
+class Validator {
+  /*
+  Required Permissions : 
+  <----------->
+   IOS :
+    - Bluetooth
+  <----------->
+   Android : 
+   if AndroidVersions < 12 
+      - Location
+      - Bluetooth
+    else
+      - Bluetooth Scan
+      - Bluetooth Connect
+  <----------->
+    Macos : 
+  <----------->
+    Windows : None
+  <----------->
+    Linux : None
+  <----------->
+    Web : 
+     Check if Browser Supports Bluetooth
+  */
+
+  static Future<bool> arePermissionsGranted() async {
+    if (!isMobilePlatform) return true;
+
+    var status = await _permissionStatus;
+    bool blePermissionGranted = status[0];
+    bool locationPermissionGranted = status[1];
+
+    if (locationPermissionGranted && blePermissionGranted) return true;
+
+    if (!blePermissionGranted) {
+      PermissionStatus blePermissionCheck =
+          await Permission.bluetooth.request();
+      if (blePermissionCheck.isPermanentlyDenied) {
+        print("Bluetooth Permission Permanently Denied");
+        openAppSettings();
+      }
+      return false;
+    }
+
+    if (!locationPermissionGranted) {
+      PermissionStatus locationPermissionCheck =
+          await Permission.location.request();
+      if (locationPermissionCheck.isPermanentlyDenied) {
+        print("Location Permission Permanently Denied");
+        openAppSettings();
+      }
+      return false;
+    }
+
+    return false;
+  }
+
+  static Future<List<bool>> get _permissionStatus async {
+    bool blePermissionGranted = false;
+    bool locationPermissionGranted = false;
+
+    if (await requiresExplicitAndroidBluetoothPermissions) {
+      bool bleConnectPermission =
+          (await Permission.bluetoothConnect.request()).isGranted;
+      bool bleScanPermission =
+          (await Permission.bluetoothScan.request()).isGranted;
+
+      blePermissionGranted = bleConnectPermission && bleScanPermission;
+      locationPermissionGranted = true;
+    } else {
+      PermissionStatus permissionStatus = await Permission.bluetooth.request();
+      blePermissionGranted = permissionStatus.isGranted;
+      locationPermissionGranted = await requiresLocationPermission
+          ? (await Permission.locationWhenInUse.request()).isGranted
+          : true;
+    }
+    return [locationPermissionGranted, blePermissionGranted];
+  }
+
+  static bool get isMobilePlatform =>
+      !kIsWeb && (Platform.isAndroid || Platform.isIOS);
+
+  static Future<bool> get requiresLocationPermission async =>
+      !kIsWeb &&
+      Platform.isAndroid &&
+      (!await requiresExplicitAndroidBluetoothPermissions);
+
+  static Future<bool> get requiresExplicitAndroidBluetoothPermissions async {
+    if (kIsWeb || !Platform.isAndroid) return false;
+    AndroidDeviceInfo androidInfo = await DeviceInfoPlugin().androidInfo;
+    return androidInfo.version.sdkInt >= 31;
+  }
+}

example/linux/.gitignore

@@ -0,0 +1 @@
+flutter/ephemeral

example/linux/CMakeLists.txt

@@ -0,0 +1,141 @@
+# Project-level configuration.
+cmake_minimum_required(VERSION 3.10)
+project(runner LANGUAGES CXX)
+
+# The name of the executable created for the application. Change this to change
+# the on-disk name of your application.
+set(BINARY_NAME "universal_ble_example")
+# The unique GTK application identifier for this application. See:
+# https://wiki.gnome.org/HowDoI/ChooseApplicationID
+set(APPLICATION_ID "com.navideck.universal_ble")
+
+# Explicitly opt in to modern CMake behaviors to avoid warnings with recent
+# versions of CMake.
+cmake_policy(SET CMP0063 NEW)
+
+# Load bundled libraries from the lib/ directory relative to the binary.
+set(CMAKE_INSTALL_RPATH "$ORIGIN/lib")
+
+# Root filesystem for cross-building.
+if(FLUTTER_TARGET_PLATFORM_SYSROOT)
+  set(CMAKE_SYSROOT ${FLUTTER_TARGET_PLATFORM_SYSROOT})
+  set(CMAKE_FIND_ROOT_PATH ${CMAKE_SYSROOT})
+  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+  set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+endif()
+
+# Define build configuration options.
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+  set(CMAKE_BUILD_TYPE "Debug" CACHE
+    STRING "Flutter build mode" FORCE)
+  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
+    "Debug" "Profile" "Release")
+endif()
+
+# Compilation settings that should be applied to most targets.
+#
+# Be cautious about adding new options here, as plugins use this function by
+# default. In most cases, you should add new options to specific targets instead
+# of modifying this function.
+function(APPLY_STANDARD_SETTINGS TARGET)
+  target_compile_features(${TARGET} PUBLIC cxx_std_14)
+  target_compile_options(${TARGET} PRIVATE -Wall -Werror)
+  target_compile_options(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:-O3>")
+  target_compile_definitions(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:NDEBUG>")
+endfunction()
+
+# Flutter library and tool build rules.
+set(FLUTTER_MANAGED_DIR "${CMAKE_CURRENT_SOURCE_DIR}/flutter")
+add_subdirectory(${FLUTTER_MANAGED_DIR})
+
+# System-level dependencies.
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
+
+add_definitions(-DAPPLICATION_ID="${APPLICATION_ID}")
+
+# Define the application target. To change its name, change BINARY_NAME above,
+# not the value here, or `flutter run` will no longer work.
+#
+# Any new source files that you add to the application should be added here.
+add_executable(${BINARY_NAME}
+  "main.cc"
+  "my_application.cc"
+  "${FLUTTER_MANAGED_DIR}/generated_plugin_registrant.cc"
+)
+
+# Apply the standard set of build settings. This can be removed for applications
+# that need different build settings.
+apply_standard_settings(${BINARY_NAME})
+
+# Add dependency libraries. Add any application-specific dependencies here.
+target_link_libraries(${BINARY_NAME} PRIVATE flutter)
+target_link_libraries(${BINARY_NAME} PRIVATE PkgConfig::GTK)
+
+# Run the Flutter tool portions of the build. This must not be removed.
+add_dependencies(${BINARY_NAME} flutter_assemble)
+
+# Only the install-generated bundle's copy of the executable will launch
+# correctly, since the resources must in the right relative locations. To avoid
+# people trying to run the unbundled copy, put it in a subdirectory instead of
+# the default top-level location.
+set_target_properties(${BINARY_NAME}
+  PROPERTIES
+  RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/intermediates_do_not_run"
+)
+
+# Enable the test target.
+set(include_universal_ble_tests TRUE)
+
+# Generated plugin build rules, which manage building the plugins and adding
+# them to the application.
+include(flutter/generated_plugins.cmake)
+
+
+# === Installation ===
+# By default, "installing" just makes a relocatable bundle in the build
+# directory.
+set(BUILD_BUNDLE_DIR "${PROJECT_BINARY_DIR}/bundle")
+if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+  set(CMAKE_INSTALL_PREFIX "${BUILD_BUNDLE_DIR}" CACHE PATH "..." FORCE)
+endif()
+
+# Start with a clean build bundle directory every time.
+install(CODE "
+  file(REMOVE_RECURSE \"${BUILD_BUNDLE_DIR}/\")
+  " COMPONENT Runtime)
+
+set(INSTALL_BUNDLE_DATA_DIR "${CMAKE_INSTALL_PREFIX}/data")
+set(INSTALL_BUNDLE_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib")
+
+install(TARGETS ${BINARY_NAME} RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_ICU_DATA_FILE}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+  COMPONENT Runtime)
+
+foreach(bundled_library ${PLUGIN_BUNDLED_LIBRARIES})
+  install(FILES "${bundled_library}"
+    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+    COMPONENT Runtime)
+endforeach(bundled_library)
+
+# Fully re-copy the assets directory on each build to avoid having stale files
+# from a previous install.
+set(FLUTTER_ASSET_DIR_NAME "flutter_assets")
+install(CODE "
+  file(REMOVE_RECURSE \"${INSTALL_BUNDLE_DATA_DIR}/${FLUTTER_ASSET_DIR_NAME}\")
+  " COMPONENT Runtime)
+install(DIRECTORY "${PROJECT_BUILD_DIR}/${FLUTTER_ASSET_DIR_NAME}"
+  DESTINATION "${INSTALL_BUNDLE_DATA_DIR}" COMPONENT Runtime)
+
+# Install the AOT library on non-Debug builds only.
+if(NOT CMAKE_BUILD_TYPE MATCHES "Debug")
+  install(FILES "${AOT_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+    COMPONENT Runtime)
+endif()

example/linux/flutter/CMakeLists.txt

@@ -0,0 +1,88 @@
+# This file controls Flutter-level build steps. It should not be edited.
+cmake_minimum_required(VERSION 3.10)
+
+set(EPHEMERAL_DIR "${CMAKE_CURRENT_SOURCE_DIR}/ephemeral")
+
+# Configuration provided via flutter tool.
+include(${EPHEMERAL_DIR}/generated_config.cmake)
+
+# TODO: Move the rest of this into files in ephemeral. See
+# https://github.com/flutter/flutter/issues/57146.
+
+# Serves the same purpose as list(TRANSFORM ... PREPEND ...),
+# which isn't available in 3.10.
+function(list_prepend LIST_NAME PREFIX)
+    set(NEW_LIST "")
+    foreach(element ${${LIST_NAME}})
+        list(APPEND NEW_LIST "${PREFIX}${element}")
+    endforeach(element)
+    set(${LIST_NAME} "${NEW_LIST}" PARENT_SCOPE)
+endfunction()
+
+# === Flutter Library ===
+# System-level dependencies.
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
+pkg_check_modules(GLIB REQUIRED IMPORTED_TARGET glib-2.0)
+pkg_check_modules(GIO REQUIRED IMPORTED_TARGET gio-2.0)
+
+set(FLUTTER_LIBRARY "${EPHEMERAL_DIR}/libflutter_linux_gtk.so")
+
+# Published to parent scope for install step.
+set(FLUTTER_LIBRARY ${FLUTTER_LIBRARY} PARENT_SCOPE)
+set(FLUTTER_ICU_DATA_FILE "${EPHEMERAL_DIR}/icudtl.dat" PARENT_SCOPE)
+set(PROJECT_BUILD_DIR "${PROJECT_DIR}/build/" PARENT_SCOPE)
+set(AOT_LIBRARY "${PROJECT_DIR}/build/lib/libapp.so" PARENT_SCOPE)
+
+list(APPEND FLUTTER_LIBRARY_HEADERS
+  "fl_basic_message_channel.h"
+  "fl_binary_codec.h"
+  "fl_binary_messenger.h"
+  "fl_dart_project.h"
+  "fl_engine.h"
+  "fl_json_message_codec.h"
+  "fl_json_method_codec.h"
+  "fl_message_codec.h"
+  "fl_method_call.h"
+  "fl_method_channel.h"
+  "fl_method_codec.h"
+  "fl_method_response.h"
+  "fl_plugin_registrar.h"
+  "fl_plugin_registry.h"
+  "fl_standard_message_codec.h"
+  "fl_standard_method_codec.h"
+  "fl_string_codec.h"
+  "fl_value.h"
+  "fl_view.h"
+  "flutter_linux.h"
+)
+list_prepend(FLUTTER_LIBRARY_HEADERS "${EPHEMERAL_DIR}/flutter_linux/")
+add_library(flutter INTERFACE)
+target_include_directories(flutter INTERFACE
+  "${EPHEMERAL_DIR}"
+)
+target_link_libraries(flutter INTERFACE "${FLUTTER_LIBRARY}")
+target_link_libraries(flutter INTERFACE
+  PkgConfig::GTK
+  PkgConfig::GLIB
+  PkgConfig::GIO
+)
+add_dependencies(flutter flutter_assemble)
+
+# === Flutter tool backend ===
+# _phony_ is a non-existent file to force this command to run every time,
+# since currently there's no way to get a full input/output list from the
+# flutter tool.
+add_custom_command(
+  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
+    ${CMAKE_CURRENT_BINARY_DIR}/_phony_
+  COMMAND ${CMAKE_COMMAND} -E env
+    ${FLUTTER_TOOL_ENVIRONMENT}
+    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.sh"
+      ${FLUTTER_TARGET_PLATFORM} ${CMAKE_BUILD_TYPE}
+  VERBATIM
+)
+add_custom_target(flutter_assemble DEPENDS
+  "${FLUTTER_LIBRARY}"
+  ${FLUTTER_LIBRARY_HEADERS}
+)

example/linux/flutter/generated_plugin_registrant.cc

@@ -0,0 +1,11 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#include "generated_plugin_registrant.h"
+
+
+void fl_register_plugins(FlPluginRegistry* registry) {
+}

example/linux/flutter/generated_plugin_registrant.h

@@ -0,0 +1,15 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#ifndef GENERATED_PLUGIN_REGISTRANT_
+#define GENERATED_PLUGIN_REGISTRANT_
+
+#include <flutter_linux/flutter_linux.h>
+
+// Registers Flutter plugins.
+void fl_register_plugins(FlPluginRegistry* registry);
+
+#endif  // GENERATED_PLUGIN_REGISTRANT_

example/linux/flutter/generated_plugins.cmake

@@ -0,0 +1,23 @@
+#
+# Generated file, do not edit.
+#
+
+list(APPEND FLUTTER_PLUGIN_LIST
+)
+
+list(APPEND FLUTTER_FFI_PLUGIN_LIST
+)
+
+set(PLUGIN_BUNDLED_LIBRARIES)
+
+foreach(plugin ${FLUTTER_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${plugin}/linux plugins/${plugin})
+  target_link_libraries(${BINARY_NAME} PRIVATE ${plugin}_plugin)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES $<TARGET_FILE:${plugin}_plugin>)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${plugin}_bundled_libraries})
+endforeach(plugin)
+
+foreach(ffi_plugin ${FLUTTER_FFI_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${ffi_plugin}/linux plugins/${ffi_plugin})
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${ffi_plugin}_bundled_libraries})
+endforeach(ffi_plugin)

example/linux/main.cc

@@ -0,0 +1,6 @@
+#include "my_application.h"
+
+int main(int argc, char** argv) {
+  g_autoptr(MyApplication) app = my_application_new();
+  return g_application_run(G_APPLICATION(app), argc, argv);
+}

example/linux/my_application.cc

@@ -0,0 +1,104 @@
+#include "my_application.h"
+
+#include <flutter_linux/flutter_linux.h>
+#ifdef GDK_WINDOWING_X11
+#include <gdk/gdkx.h>
+#endif
+
+#include "flutter/generated_plugin_registrant.h"
+
+struct _MyApplication {
+  GtkApplication parent_instance;
+  char** dart_entrypoint_arguments;
+};
+
+G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION)
+
+// Implements GApplication::activate.
+static void my_application_activate(GApplication* application) {
+  MyApplication* self = MY_APPLICATION(application);
+  GtkWindow* window =
+      GTK_WINDOW(gtk_application_window_new(GTK_APPLICATION(application)));
+
+  // Use a header bar when running in GNOME as this is the common style used
+  // by applications and is the setup most users will be using (e.g. Ubuntu
+  // desktop).
+  // If running on X and not using GNOME then just use a traditional title bar
+  // in case the window manager does more exotic layout, e.g. tiling.
+  // If running on Wayland assume the header bar will work (may need changing
+  // if future cases occur).
+  gboolean use_header_bar = TRUE;
+#ifdef GDK_WINDOWING_X11
+  GdkScreen* screen = gtk_window_get_screen(window);
+  if (GDK_IS_X11_SCREEN(screen)) {
+    const gchar* wm_name = gdk_x11_screen_get_window_manager_name(screen);
+    if (g_strcmp0(wm_name, "GNOME Shell") != 0) {
+      use_header_bar = FALSE;
+    }
+  }
+#endif
+  if (use_header_bar) {
+    GtkHeaderBar* header_bar = GTK_HEADER_BAR(gtk_header_bar_new());
+    gtk_widget_show(GTK_WIDGET(header_bar));
+    gtk_header_bar_set_title(header_bar, "universal_ble_example");
+    gtk_header_bar_set_show_close_button(header_bar, TRUE);
+    gtk_window_set_titlebar(window, GTK_WIDGET(header_bar));
+  } else {
+    gtk_window_set_title(window, "universal_ble_example");
+  }
+
+  gtk_window_set_default_size(window, 1280, 720);
+  gtk_widget_show(GTK_WIDGET(window));
+
+  g_autoptr(FlDartProject) project = fl_dart_project_new();
+  fl_dart_project_set_dart_entrypoint_arguments(project, self->dart_entrypoint_arguments);
+
+  FlView* view = fl_view_new(project);
+  gtk_widget_show(GTK_WIDGET(view));
+  gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(view));
+
+  fl_register_plugins(FL_PLUGIN_REGISTRY(view));
+
+  gtk_widget_grab_focus(GTK_WIDGET(view));
+}
+
+// Implements GApplication::local_command_line.
+static gboolean my_application_local_command_line(GApplication* application, gchar*** arguments, int* exit_status) {
+  MyApplication* self = MY_APPLICATION(application);
+  // Strip out the first argument as it is the binary name.
+  self->dart_entrypoint_arguments = g_strdupv(*arguments + 1);
+
+  g_autoptr(GError) error = nullptr;
+  if (!g_application_register(application, nullptr, &error)) {
+     g_warning("Failed to register: %s", error->message);
+     *exit_status = 1;
+     return TRUE;
+  }
+
+  g_application_activate(application);
+  *exit_status = 0;
+
+  return TRUE;
+}
+
+// Implements GObject::dispose.
+static void my_application_dispose(GObject* object) {
+  MyApplication* self = MY_APPLICATION(object);
+  g_clear_pointer(&self->dart_entrypoint_arguments, g_strfreev);
+  G_OBJECT_CLASS(my_application_parent_class)->dispose(object);
+}
+
+static void my_application_class_init(MyApplicationClass* klass) {
+  G_APPLICATION_CLASS(klass)->activate = my_application_activate;
+  G_APPLICATION_CLASS(klass)->local_command_line = my_application_local_command_line;
+  G_OBJECT_CLASS(klass)->dispose = my_application_dispose;
+}
+
+static void my_application_init(MyApplication* self) {}
+
+MyApplication* my_application_new() {
+  return MY_APPLICATION(g_object_new(my_application_get_type(),
+                                     "application-id", APPLICATION_ID,
+                                     "flags", G_APPLICATION_NON_UNIQUE,
+                                     nullptr));
+}

example/linux/my_application.h

@@ -0,0 +1,18 @@
+#ifndef FLUTTER_MY_APPLICATION_H_
+#define FLUTTER_MY_APPLICATION_H_
+
+#include <gtk/gtk.h>
+
+G_DECLARE_FINAL_TYPE(MyApplication, my_application, MY, APPLICATION,
+                     GtkApplication)
+
+/**
+ * my_application_new:
+ *
+ * Creates a new Flutter-based application.
+ *
+ * Returns: a new #MyApplication.
+ */
+MyApplication* my_application_new();
+
+#endif  // FLUTTER_MY_APPLICATION_H_