i just found at Conrad a new supplier for smart home stuff. Sygonix has multiple sensors and a gateway with smartphone configuration (https://www.conrad.de/de/sygonix-home-gateway-sh-gw1-1597115.html).
I just wondered if it is possible to integrate this into openhab2, bu i did not found a binding. I think the device is very similar (if not the same) to xiaomi mi smart home. For the Xiaomi there exists a binding. Does anyone know a little bit more?