Foti Dim
9521c2552a
* Improve readme * rename OnPairStateChange api --------- Co-authored-by: Rohit Sangwan <rohitsangwan647@gmail.com>
663 lines
26 KiB
Dart
663 lines
26 KiB
Dart
// ignore_for_file: avoid_print, depend_on_referenced_packages
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import 'dart:convert';
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import 'package:convert/convert.dart';
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import 'package:expandable/expandable.dart';
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import 'package:flutter/foundation.dart';
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import 'package:flutter/material.dart';
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import 'package:universal_ble/universal_ble.dart';
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import 'package:universal_ble_example/main.dart';
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String gssUuid(String code) => '0000$code-0000-1000-8000-00805f9b34fb';
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class PeripheralDetailPage extends StatefulWidget {
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final String deviceId;
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final bool autoConnect;
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const PeripheralDetailPage(this.deviceId, this.autoConnect, {Key? key})
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: super(key: key);
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@override
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State<StatefulWidget> createState() {
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return _PeripheralDetailPageState();
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}
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}
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class _PeripheralDetailPageState extends State<PeripheralDetailPage> {
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bool isConnected = false;
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bool parseValue = true;
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GlobalKey<FormState> uuidFormKey = GlobalKey<FormState>();
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GlobalKey<FormState> valueFormKey = GlobalKey<FormState>();
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List<BleService> discoveredServices = [];
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ExpandableController expandableController =
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ExpandableController(initialExpanded: autoConnect);
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List<String> results = [];
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@override
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void initState() {
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super.initState();
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UniversalBle.onConnectionChanged = _handleConnectionChange;
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UniversalBle.onValueChanged = _handleValueChange;
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UniversalBle.onPairingStateChange =
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(String deviceId, bool isPaired, String? error) {
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print('OnPairingStateChange $deviceId, $isPaired');
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setState(() {
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if (error != null) {
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results.add("PairStateChangeError (Paired: $isPaired): $error ");
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} else {
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results.add('PairStateChange: $isPaired');
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}
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});
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};
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if (autoConnect) {
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UniversalBle.connect(widget.deviceId);
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}
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}
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@override
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void dispose() {
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super.dispose();
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UniversalBle.onConnectionChanged = null;
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UniversalBle.onValueChanged = null;
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// Disconnect when leaving the page
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if (isConnected) UniversalBle.disconnect(widget.deviceId);
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}
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void _handleConnectionChange(String deviceId, BleConnectionState state) {
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print('_handleConnectionChange $deviceId, ${state.name}');
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setState(() {
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if (deviceId == widget.deviceId) {
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isConnected = (state == BleConnectionState.connected);
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}
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results.add('Connection: ${state.name.toUpperCase()}');
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});
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// Auto Discover Services
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if (isConnected) {
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discoverServices();
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} else if (autoConnect && !isConnected) {
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print("Trying to reconnect");
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UniversalBle.connect(widget.deviceId);
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}
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}
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void discoverServices() async {
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var services = await UniversalBle.discoverServices(widget.deviceId);
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print('${services.length} services discovered');
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discoveredServices.clear();
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setState(() {
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discoveredServices = services;
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});
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}
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void _handleValueChange(
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String deviceId, String characteristicId, Uint8List value) {
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String s = String.fromCharCodes(value);
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String data =
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parseValue ? '$s\nraw : ${value.toString()}' : value.toString();
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print('_handleValueChange $deviceId, $characteristicId, $s');
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setState(() {
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results.add("Value: $data");
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});
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}
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Uint8List? _getWriteValue() {
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if (!uuidFormKey.currentState!.validate() ||
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!valueFormKey.currentState!.validate()) {
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return null;
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}
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if (binaryCode.text.isEmpty) {
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print("Error: No value to write");
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return null;
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}
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List<int>? value;
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String text = binaryCode.text;
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if (text.contains(",") || text.contains("[") || text.contains("]")) {
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text = text.replaceAll("[", "").replaceAll("]", "").trim();
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value = text.split(',').map(int.parse).toList();
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} else {
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try {
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value = hex.decode(text);
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} catch (e) {
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print("Error parsing hex $e");
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print("Trying utf8 encoding");
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value = utf8.encode(text);
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}
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}
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return Uint8List.fromList(value);
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}
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final serviceUUID = TextEditingController();
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final characteristicUUID = TextEditingController();
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final binaryCode = TextEditingController();
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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title: const Text('Peripheral Details'),
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actions: [
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Padding(
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padding: const EdgeInsets.all(8.0),
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child: Icon(
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Icons.circle,
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color: isConnected ? Colors.greenAccent : Colors.red,
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size: 20,
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),
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)
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],
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),
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body: LayoutBuilder(builder: (context, constraints) {
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bool isDesktop = constraints.maxWidth > 1000;
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return Row(
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children: [
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if (isDesktop)
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Expanded(
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flex: 1,
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child: Container(
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color: Colors.grey[300],
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child: discoveredServices.isEmpty
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? const Center(
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child: Text('No Services Discovered'),
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)
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: ServicesView(
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discoveredServices: discoveredServices,
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scrollable: true,
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onTap: (BleService service,
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BleCharacteristic characteristic) {
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serviceUUID.text = service.uuid;
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characteristicUUID.text = characteristic.uuid;
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print(
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characteristic.properties.map((e) => e.name),
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);
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},
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),
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),
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),
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Expanded(
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flex: 3,
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child: Align(
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alignment: Alignment.topCenter,
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child: SingleChildScrollView(
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child: Form(
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key: uuidFormKey,
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child: Column(
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children: [
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// Top buttons
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Padding(
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padding: const EdgeInsets.all(8.0),
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child: Row(
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mainAxisAlignment: MainAxisAlignment.spaceEvenly,
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children: <Widget>[
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PlatformButton(
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text: 'Connect',
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enabled: !isConnected,
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onPressed: () async {
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try {
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await UniversalBle.connect(widget.deviceId);
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} catch (e) {
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print(e);
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setState(() {
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results.add('ConnectError : $e');
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});
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}
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},
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),
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PlatformButton(
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text: 'Disconnect',
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enabled: isConnected,
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onPressed: () {
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UniversalBle.disconnect(widget.deviceId);
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},
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),
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],
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),
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),
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const Divider(),
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// Text Fields
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Padding(
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padding: const EdgeInsets.all(8.0),
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child: TextFormField(
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controller: serviceUUID,
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validator: (value) {
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if (value == null || value.isEmpty) {
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return 'Please enter a service uuid';
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}
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return null;
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},
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decoration: const InputDecoration(
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labelText: 'ServiceUUID',
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border: OutlineInputBorder(),
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),
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),
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),
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Padding(
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padding: const EdgeInsets.all(8.0),
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child: TextFormField(
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controller: characteristicUUID,
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validator: (value) {
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if (value == null || value.isEmpty) {
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return 'Please enter a Characteristic uuid';
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}
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return null;
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},
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decoration: const InputDecoration(
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labelText: 'CharacteristicUUID',
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border: OutlineInputBorder(),
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),
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),
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),
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Form(
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key: valueFormKey,
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child: Padding(
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padding: const EdgeInsets.all(8.0),
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child: Row(
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children: [
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Expanded(
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flex: 5,
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child: TextFormField(
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controller: binaryCode,
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validator: (value) {
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if (value == null || value.isEmpty) {
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return 'Please enter a value';
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}
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return null;
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},
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decoration: const InputDecoration(
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labelText: 'Enter Value ',
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hintText:
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"Enter Value (String, Hex or List<int>)",
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border: OutlineInputBorder(),
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),
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),
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),
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Switch(
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value: parseValue,
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onChanged: (value) {
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setState(() {
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parseValue = value;
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});
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}),
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],
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),
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),
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),
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const Divider(),
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// Buttons
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Padding(
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padding: const EdgeInsets.all(8.0),
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child: LayoutBuilder(builder: (context, constraints) {
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const tileWidth = 150;
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const tileHeight = 500;
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final count = constraints.maxWidth ~/ tileWidth;
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return GridView.count(
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crossAxisCount: count,
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crossAxisSpacing: 8,
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mainAxisSpacing: 8,
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childAspectRatio: tileHeight / tileWidth,
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shrinkWrap: true,
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physics: const NeverScrollableScrollPhysics(),
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children: [
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PlatformButton(
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enabled: isConnected,
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onPressed: () {
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Uint8List? value = _getWriteValue();
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if (value == null) return;
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print("Writing $value");
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UniversalBle.writeValue(
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widget.deviceId,
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serviceUUID.text,
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characteristicUUID.text,
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value,
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BleOutputProperty.withResponse);
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},
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text: 'Write',
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),
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PlatformButton(
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enabled: isConnected,
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onPressed: () async {
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if (!uuidFormKey.currentState!.validate()) {
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return;
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}
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try {
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Uint8List value =
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await UniversalBle.readValue(
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widget.deviceId,
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serviceUUID.text,
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characteristicUUID.text);
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String s = String.fromCharCodes(value);
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String data = parseValue
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? '$s\nraw : ${value.toString()}'
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: value.toString();
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setState(() {
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results.add('Read : $data');
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});
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} catch (e) {
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print(e);
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setState(() {
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results.add('ReadError : $e');
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});
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}
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},
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text: 'Read',
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),
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PlatformButton(
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enabled: isConnected,
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onPressed: () async {
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int mtu = await UniversalBle.requestMtu(
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widget.deviceId, 247);
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setState(() {
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results.add('MTU : $mtu');
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});
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},
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text: 'Request Mtu',
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),
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PlatformButton(
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enabled: isConnected,
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onPressed: () {
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if (!uuidFormKey.currentState!.validate()) {
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return;
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}
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BleCharacteristic? characteristic;
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for (BleService service
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in discoveredServices) {
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for (BleCharacteristic c
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in service.characteristics) {
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if (c.uuid == characteristicUUID.text) {
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characteristic = c;
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break;
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}
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}
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}
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BleInputProperty inputProperty =
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BleInputProperty.notification;
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if (characteristic != null) {
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if (characteristic.properties.contains(
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CharacteristicProperty.indicate)) {
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inputProperty =
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BleInputProperty.indication;
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} else if (characteristic.properties
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.contains(
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CharacteristicProperty.notify)) {
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inputProperty =
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BleInputProperty.notification;
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} else {
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print('No notify or indicate property');
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return;
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}
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}
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print(inputProperty);
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UniversalBle.setNotifiable(
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widget.deviceId,
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serviceUUID.text,
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characteristicUUID.text,
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inputProperty,
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);
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},
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text: 'Notify/Indicate',
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),
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PlatformButton(
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enabled: isConnected,
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onPressed: () {
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if (!uuidFormKey.currentState!.validate()) {
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return;
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}
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UniversalBle.setNotifiable(
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widget.deviceId,
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serviceUUID.text,
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characteristicUUID.text,
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BleInputProperty.disabled,
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);
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},
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text: 'Cancel Notify',
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),
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PlatformButton(
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onPressed: () async {
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discoverServices();
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},
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enabled: isConnected,
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text: 'Discover Services',
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),
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PlatformButton(
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onPressed: () async {
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await UniversalBle.pair(widget.deviceId);
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},
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text: 'Pair',
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),
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PlatformButton(
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onPressed: () async {
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bool isPaired = await UniversalBle.isPaired(
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widget.deviceId);
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setState(() {
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results.add('IsPaired : $isPaired');
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});
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},
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text: 'IsPaired',
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),
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PlatformButton(
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onPressed: () async {
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await UniversalBle.unPair(widget.deviceId);
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},
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text: 'UnPair',
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),
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PlatformButton(
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onPressed: () async {
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setState(() {
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results.clear();
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discoveredServices.clear();
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});
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},
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text: 'Clear',
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),
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],
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);
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}),
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),
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// Results , Services
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if (!isDesktop)
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Column(
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children: [
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ResultView(
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results: results,
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onClearTap: (int? index) {
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setState(() {
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if (index != null) {
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results.removeAt(index);
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} else {
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results.clear();
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}
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});
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}),
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const Divider(),
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ServicesView(
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discoveredServices: discoveredServices,
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onTap: (BleService service,
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BleCharacteristic characteristic) {
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serviceUUID.text = service.uuid;
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characteristicUUID.text = characteristic.uuid;
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print(
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characteristic.properties
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.map((e) => e.name),
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);
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},
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),
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],
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)
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],
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),
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),
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),
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),
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),
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// For Desktop
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if (isDesktop)
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Expanded(
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flex: 1,
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child: Container(
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color: Colors.grey[300],
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child: results.isEmpty
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? const Center(
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child: Text('No results'),
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)
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: ResultView(
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results: results,
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scrollable: true,
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onClearTap: (int? index) {
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setState(() {
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if (index != null) {
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results.removeAt(index);
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} else {
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results.clear();
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}
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});
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}),
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)),
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],
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);
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}),
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);
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}
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}
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class ResultView extends StatelessWidget {
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final List<String> results;
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final bool scrollable;
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final Function(int? index) onClearTap;
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const ResultView({
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required this.results,
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required this.onClearTap,
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this.scrollable = false,
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super.key,
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});
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|
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@override
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Widget build(BuildContext context) {
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return ListView.builder(
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shrinkWrap: !scrollable,
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physics: scrollable ? null : const NeverScrollableScrollPhysics(),
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itemCount: results.length,
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itemBuilder: (BuildContext context, int index) {
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return Padding(
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padding: const EdgeInsets.all(8.0),
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child: Card(
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child: ListTile(
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onTap: () {
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onClearTap(index);
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},
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title: Text(results[index]),
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trailing: const Icon(Icons.clear),
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),
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),
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);
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},
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);
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}
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}
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class ServicesView extends StatelessWidget {
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final List<BleService> discoveredServices;
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final bool scrollable;
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|
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final Function(BleService service, BleCharacteristic characteristic)? onTap;
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const ServicesView({
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super.key,
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required this.discoveredServices,
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this.onTap,
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this.scrollable = false,
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});
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|
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@override
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Widget build(BuildContext context) {
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return ListView.builder(
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shrinkWrap: !scrollable,
|
|
physics: scrollable ? null : const NeverScrollableScrollPhysics(),
|
|
itemCount: discoveredServices.length,
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itemBuilder: (BuildContext context, int index) {
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return Padding(
|
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padding: const EdgeInsets.all(8.0),
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child: Card(
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child: ExpandablePanel(
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|
header: Container(
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color: scrollable ? Colors.lime : Colors.grey[300],
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|
child: Padding(
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|
padding: const EdgeInsets.all(8.0),
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|
child: Row(
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children: [
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const Icon(Icons.arrow_forward_ios),
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Expanded(child: Text(discoveredServices[index].uuid)),
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],
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),
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),
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),
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collapsed: const SizedBox(),
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|
expanded: Column(
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children: discoveredServices[index]
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.characteristics
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.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),
|
|
);
|
|
}
|
|
}
|