Would it be possible to add a new channel for the configuration item “Measured Temperature Offset” for the Eurotronic Spirit TRV? It’s described on page 18 of this document (parameter #8):
I’d be happy to try giving this a go myself if someone can point me to some instructions, but I am very new to openhab so my knowledge is limited.
Once you update the entry with the new channel and Chris accepts the changes it will become part of the snapshot version of OH, usually it takes a few days.