Hi Roelb,
do you have any idea how I can integrate the Daikin in gassistant (google-home) ? - It shows in the google-home app, but i can only turn it on or off.
Sorry for the late response. Must have missed the notification, and have been very busy on other work for the last months.
As for your question: no, I have not looked at Google Assistent integration in depth. I do use the current module myself to turn the aircons on and off, but no more. The Google Assistent module documentation unfortunately is almost nonexistant and it's code, both FHEM module and corresponding daemon, is completely undocumented as well. I did have had a peek in there for other integrations about a year ago, but quickly abandonded that due the the lack of documentation and messy code.
If you did manage to get it to work, please share! And if you require any changes in the Daikin module to get the integration to work, just ask.. I'm more than happy to extend the Daikin module with some extra commands or readings if that is neccessary.