gracingpro/blauberg-homeassistant — reverse-engineered prompt

Build me a small Python service that connects my Blauberg ventilation unit to Home Assistant. It should work with a Blauberg system that uses the Modbus S21 controller, especially the KOMFORT series.

I want it to read the ventilation data from the controller over Modbus on a regular interval, then publish the values to my MQTT broker so Home Assistant can discover them automatically with proper names, icons, units, and topics. I also want basic controls in Home Assistant using switches and selection fields where the controller supports it.

Please make it easy to run with Docker and Docker Compose. Use a simple config file where I can set the ventilation unit IP address, MQTT username, password, host, port, main topic, Home Assistant discovery topic, scrape interval, API token, and API port.

Also include a small read only API that lets me check current alarms, coils, discrete inputs, input registers, and holding registers. Keep the setup simple and include clear usage instructions.