My fibaro show the temperature as 173. I am pretty sure it is not that hot in the house. I have tried various device handlers and I got the same results.
I have contacted Fibaro tech support and they told me it is an issue with ST. Anyone has the same issue or a fix for it.
I have actually tried that handler along with two others but the result is same. I realized yesterday also that the motion is stuck on motion all the time. I have deregister the device from the hub the result is same.
How about starting again from scratch.
Dis-associate the sensor. Then reset the sensor to factory settings. It tells you how to do it in the manual.
Then start again.
As soon as it is discovered go into the ide and change the DTH to @CSC’s.
You may have already tried all of this but if not I would give it a go.
Good luck.