It is said that it's not good to switch ON and OFF heater directly. You have to pass by pilot wire. So I use delta dore because it's my historic installation. I have these kind of command : Sun Nov 24 2019 16:33:07 GMT+0000 (UTC) - Send Value : 20;AE;X2D;ID=003e8ea;SWITCH=29;CMD=ON;EXT=Contact;BAT ...

Problem is that we need a controller in order to find commands. So I just bought a little door detector to set driver on or off. The problem is that if I want to do more command from rflink, I have to buy a full controller like tydom 315 which is very expensive... And it's not very useful for me ...

Well, I read again documentation about Tydom520 module, it may work with association functions I have coded. But don't expect too much, it's not clear about what can be done. Maybe in this case, you need full message (74 bytes instead of 14 bytes ) ? Maybe messages are different ? And maybe it's ...