Daikin integration help

My new Daikin airco FTXM does not have an API for security reasons. I want to integrate into IP symcon. Connection of Onecta to google home works fine. So Trying via ip-symcon to Google assistant to Onecta to Airco, but no success to get commands from ip-symcon to Google Home.

Installing KNX or other bridge is somewhere over E1000 for 2 units. So no real option.

Anyone suggestions to send non-voice commands to google home or reroutes via other apps.

Hope anyone can help?