This firmware turns a Sonoff Basic/4CH, Gosund SW1/SW5/SW6, or Shelly 1 into an MQTT light in Home Assistant. platformio.sample.ini shows how to configure the project for multiple devices. All options and their defaults can be found in config.h. No configuration on the Home Assistant side is necessary besides setting up the MQTT integration; all device-specific settings are shared via MQTT discovery.
Add upload_protocol = espota to platformio.ini after flashing the firmware once to enable over-the-air updates. To update OTA a device running the single_light environment with an IP address of 192.168.1.3, you would run
pio run -e single_light -t upload --upload-port 192.168.1.3You can also add upload_port = 192.168.1.3 to platformio.ini instead of using the --upload-port flag.
The Gosund SW6 is a smart 3-way light switch, but it can be used in 2-way mode (same as the SW1/SW5). Simply connect the load to Traveler 2 and omit the THREEWAY define.
You can reboot the devices via MQTT by sending a message (default: restart) manually to the device's command topic (default: <base topic>/cmd). Home Assistant provides a way to publish arbitrary messages in Settings > Devices & Services > (MQTT Integration) Configure.