@TimO

many thanks for quick answer. I already remove the jar file and delete the cache, tmp and mysensors folder in the userdata folder several times. The textual configuration is used for many years, with some small updates. I don't try the gui configuration.

If you need more data's for debugging, I will provide.

@TimO ,

many thanks for the updated binding. I just wait to update my OpenHAB to version 3.0.0 till your binding is ready. I use a OpenHAB manual install since many years on a ArchLinuxARM system. My Mysensors gateway is a serial one, which works like a charm till OpenHAB 2.5.11 and your bindings.

Today I updated to OpenHAB 3.0.0 and tried also OpenHAB 3.1.0-Snapshot. In both cases I got the Mysensors binding not working. It shows just "Initializing" in the Things overview. mqtt and serial transport features are installed. I don't change the manual config (things / items) files from 2.5.11 to 3.0.0.

If I use the openhab console, the bundle:diag and bundle:status shows "Active" and no errors.

If I take a look into the openhab.log, I found entries like:

[WARN ] [core.karaf.internal.FeatureInstaller] - The binding add-on 'mysensors' does not exist - ignoring it.

or

[WARN ] [org.apache.felix.fileinstall        ] - A bundle with the same symbolic name (org.openhab.binding.mysensors) and version (3.1.0.202012312203) is already installed.  Updating this bundle 
instead.

[WARN ] [org.apache.felix.fileinstall        ] - Failed to uninstall bundle: /opt/openhab/addons/org.openhab.binding.mysensors-3.1.0.jar.1 with id: 87. The bundle has already been uninstalled

Maybe you can share some ideas how to solve this issue? Any help is appreciated...