Bosch Smart Home Binding wall-thermostat no Device ID is working

Hello guys,

i hope some of you can help me. I am trying to get my Bosch wall thermostates into OpenHAB3.
I successfully got the bridge into OpenHAB but now I need my wall thermostates in there, but everything i tried is not working. The binding asks me for a Device ID, which i entered in there. But it still shows “Invalid Device ID”. I tried every single ID I had, but nothing is working.
In the Documentation, it is shown, that devices should be discovered automatically, but this never happened to me. What did I do wrong at which point?
Maybe someone can help me with it.

Thank you very much!