# MQTT-DCC ESP32 PlatformIO Project

This project runs on an ESP32 (PlatformIO) and:
- Connects to WiFi and an MQTT broker
- Listens on the `dcc/command` topic for JSON accessory commands
- Generates a simplified DCC accessory packet and simulates sending it via a GPIO pin
- Publishes status/acknowledgements to `dcc/status`

Setup:
1. Edit `include/config.h` and set `WIFI_SSID`, `WIFI_PASSWORD`, `MQTT_SERVER`, and other values.
2. Build and upload with PlatformIO.

Command format (JSON published to `dcc/command`):
{
  "id": "optional-correlation-id",
  "address": 123,
  "state": true
}

Notes:
- The DCC packet generator here is a simplified representation. For NMRA-compliant output you will need a timing-accurate bitstream and the proper packet framing.
- Want me to add NMRA timing/pulse generation, OTA, or an example MQTT client for testing? Ask and I'll add it.