Sorry I can't write the scripts and code, I really don't know where to find this "SWITCH".. and I use domoticz, so if someone can convert this code for tolk to domoticz it will be great for me. I know how to do it in Home Assistant, they have great integration with MQTT but no clue about DOMOTICZ...

Apparently there is an Issue that is describing exactly this aspect:
https://github.com/gieemek/ComfoAir_Bin ... d/issues/1
will give it a try.

That's why the author of the OpenHAB binding has implemented a switch which controls if PC or CCEasy is controlling the unit. This should be possible also on other platforms Btw, he has also implemented a mode switch - Exhaust&Supply, Supply only or Exhaust only. I can't figure out which commands he ...

Btw, there seems to be very good documentation for integration with OpenHAB, this includes information that the RS232 port on PCB should be used and that you can control the mode:
https://www.openhab.org/addons/bindings/comfoair1/

Right, same here. I've disconnected the Easy panel completely and now everything works! I've published my code https://github.com/adorobis/hacomfoairmqtt as I'm integrating it with Home Assistant :) Regarding the two connected devices at the same time, there are some commands that enable one or the ...

In my Zehnder 350lux on the main board is DB9 socket. I have conected RPI _ adapter USB rs232 ( DB9) and cable 3 pins GND, TX,RX, to the Zehnder DB9 and it's working. Could you tell a bit more about that? What cable have you used exactly? I have the same issue with strange and ever changing values ...