Fritz!Dect 301 Auto Offset via MQTT
**Is your feature request related to a problem? Please describe.**
Hey, so there is a feature in the Fritz!Box to take a DECT 200 and act as an external offset sensor. But you can also specify an manual offset.

**Describe the solution you'd like**
 So my plan is to take a Zigbee sensor (which I already own) and act as the offset sensor. So that if I publish in a Topic the current Sensor value the offset ist calculated and added. The Plugin would use the API/Webinterface to make the call and set the new offset.