Weird Temperature offset if Dect 440 is used.
**Describe the bug**
When a Dect440 is in usw as temperature for a 301 Valve in Homebridge I get some offset of 2,5 degree. For example Dect 440 reads 15 degree, Dect 301 reads 15,5 degree. HomeKit says 18,5 Degree. 

**To Reproduce**
Steps to reproduce the behavior:
Use a DECT 301 with Dect 440 in one room

**Expected behavior**
HomeKit should display the correct temperature.

**Screenshots**
![image](https://user-images.githubusercontent.com/90055492/213927865-d7cea158-31f6-4582-a76a-a22634de3e66.jpeg)
![image](https://user-images.githubusercontent.com/90055492/213927873-7efcb5b9-4d0d-405c-bdd4-e5049799ce1a.jpeg)

**Desktop (please complete the following information):**
 - OS: iOS 16.2
 - HomeKit and Fritz SmartHome
 - Version: Latest version and FritzOS 7.31

**Smartphone (please complete the following information):**
 - Device: iPhone 13 Pro Max 
 - OS: iOS 16.2