Zehnder ComfoAir CA350 integration via serial connection (RS232) and MQTT

For my ComfoAir SL 330 I have recently built an ESPHome module based on wichers/esphome-comfoair but I also wanted to be able to use my wall-mounted Zehnder ComfoSense control and since I also needed to recently replace the filters I wanted to be able to reset the filter warning from ESPHome so I made a few improvements to the firmware that I thought I’d share here if others also want to be able to use those. Also since I based my module on the ESP8266 Witty Cloud ESP-12F module which comes with a 3 color LED and a button. I added some status reporting through the led and setting the mode thought the button for more authonomy.

Happy to provide more details about putting the thing together if there are questions. I am also going to work on improving the documentation of the repo in the next days.

Thee github repo is here

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