@rossko57: thanks a lot. I thought that dpt 13.010 should be transformed to a signed integer in openhab? However, in paperUI, I get the floating point number.
I solved the issue… I needed to reboot the system, in order that the things file with the dpt 13.010 took effect (had before a wrong dpt in the things file), so it was a transient issue
Makes sense, many bindings (depending how they initialize) are not so good at picking up small edits in flight.
You can just restart the binding in such cases.