gateway/README.md

Gateway Rewrite

This folder hosts the native ESP-IDF C++ rewrite of the Lua DALI gateway.

Layout

• apps/: standard ESP-IDF applications for each firmware role.
  • apps/gateway/main/Kconfig.projbuild: project-visible gateway-role settings such as per-channel native/serial PHY selection, gateway ids, pin mapping, and startup transport policy.
• components/: reusable components shared by all gateway applications.
  • gateway_core/: boot profile and top-level role bootstrap.
  • dali/: vendored ESP-IDF DALI HAL/backend reused from LuatOS, including native raw receive fan-out.
  • dali_domain/: native DALI domain facade over dali_cpp and raw frame sinks.
  • gateway_cache/: DALI scene/group/settings/runtime cache used by controller reconciliation and protocol bridges.
  • gateway_bridge/: per-channel bridge provisioning, command execution, protocol startup, and HTTP bridge actions.
  • gateway_modbus/: gateway-owned Modbus TCP config, generated DALI point tables, and provisioned Modbus model override dispatch.
  • gateway_bacnet/: BACnet/IP server adapter backed by bacnet-stack, including the gateway-owned BACnet bridge model adapter.
  • gateway_ble/: NimBLE GATT bridge for BLE transport parity on FFF1/FFF2/FFF3, including raw DALI notifications.
  • gateway_controller/: Lua-compatible gateway command dispatcher, internal scene/group state, and notification fan-out.
  • gateway_network/: HTTP /info, /dali/cmd, /led/1, /led/0, /jq.js, UDP port 2020 command/notify routing, Wi-Fi STA lifecycle, ESP-Touch smartconfig, setup AP mode, ESP-NOW setup ingress, and BOOT-button Wi-Fi reset for the native gateway.
  • gateway_runtime/: persistent runtime state, command queueing, and device info services.
  • gateway_usb_setup/: optional USB Serial/JTAG setup bridge; disabled by default so USB remains available for debug at boot.

Current status

The native rewrite now wires a shared gateway_core bootstrap component, a multi-channel dali_domain wrapper over dali_cpp, a local vendored dali hardware backend from the LuatOS ESP-IDF port with raw receive fan-out, an initial gateway_runtime service that provides persistent settings, device info, Lua-compatible command framing helpers, and Lua-style query command deduplication, plus a gateway_controller service that starts the gateway command task, dispatches core Lua gateway opcodes, and owns internal scene/group state. The gateway app also includes a gateway_ble NimBLE bridge that advertises a Lua-compatible GATT service and forwards FFF3 framed notifications, incoming FFF1/FFF2/FFF3 writes, and native raw DALI frame notifications into the matching raw channel, and a gateway_network service that provides the native HTTP /info, GET/POST /dali/cmd, /led/1, /led/0, /jq.js, UDP control-plane router on port 2020, Wi-Fi STA lifecycle, ESP-Touch smartconfig credential provisioning, the Lua-style LAMMIN_Gateway setup AP on 192.168.3.1, ESP-NOW setup ingress for Lua-compatible connReq/connAck/echo/cmd/data/uart packets, native raw DALI frame forwarding back to connected setup peers, and BOOT-button Wi-Fi credential clearing. Startup behavior is configured in main/Kconfig.projbuild: BLE is enabled by default, Wi-Fi STA, smartconfig, and ESP-NOW setup mode are disabled by default, and the built-in USB Serial/JTAG interface stays in debug mode unless the optional USB setup bridge mode is selected. Runtime settings and internal scene/group data are cached in RAM after load, skip unchanged flash writes, and batch Wi-Fi credential commits to reduce flash stalls on ESP32-S3 boards where flash and PSRAM share the SPI bus. The gateway app exposes per-channel PHY selection through main/Kconfig.projbuild; each channel can be disabled, bound to the native DALI GPIO HAL, or bound to a UART1/UART2 serial PHY. The checked-in sdkconfig is aligned with the app's custom 16 MB partition table so the Wi-Fi/BLE/network-enabled image fits the OTA app slots.

Modbus TCP

Modbus TCP is owned by gateway/components/gateway_modbus and started through the per-channel bridge service. The gateway keeps the existing bridge config JSON shape with a top-level modbus object containing transport, host, port, and unitID, but parsing and runtime behavior now live in the gateway project rather than in dali_cpp.

The first generated map slice creates stable points for every DALI short address 0-63 whether the device is online, offline, or never seen. Per short address, the generated map reserves a 32-point stride in each Modbus space:

• Coils: command triggers such as on, off, recall max, and recall min.
• Discrete inputs: inventory, online, supported device-type, cache-known, and base status bit positions.
• Holding registers: writable brightness, color temperature, group mask, power-on level, system-failure level, min/max level, and fade time.
• Input registers: read-only inventory state, primary type, type mask, cached actual level, scene id, raw status placeholder, group mask, and cached settings.

Unknown numeric values read as 0xFFFF; booleans read as false unless inventory or cache state proves otherwise. Provisioned Modbus models still work as overrides at their configured Modbus point, and normal generated reads prefer gateway cache state to avoid DALI bus polling.

An extension discrete-input range starts immediately after the legacy 0-63 short-address block. It publishes decoded DALI status, failure, and feature bits as individual booleans for base status, DT1 emergency, DT4/5/6 control-gear feature/failure status, and DT8 color status/features. This keeps existing Modbus addresses stable while making bit-level diagnostics readable without consumers masking packed status registers.

BACnet/IP

BACnet/IP is owned by gateway/components/gateway_bacnet and is started through the per-channel bridge service. Runtime BACnet server settings live under top-level bacnetServer in bridge config:

{
	"bacnetServer": {
		"deviceInstance": 4194303,
		"localAddress": "",
		"udpPort": 47808
	}
}

Provisioned BACnet models still use generic BridgeModel fields such as object type, object instance, property, and optional bitIndex. Query-style models refresh BACnet Present_Value from live DALI reads, and binary models with bitIndex expose a single packed status bit.

For discovered DALI short addresses, the gateway also mirrors the generated Modbus discrete diagnostics as BACnet binary-input objects. Object instances are allocated in a gateway-owned generated range using the channel index plus the generated Modbus discrete-input offset, so generated objects stay deterministic while avoiding the provisioned-object address space in normal deployments.