B) I am using marketplace binding inside openhab (level beta) to install the two modbus bindings. How to keep them updated? How can I see which “version” I use?
Do refer to the modbus transport and modbus binding?
Not sure if you can find out the exact versions from paper UI. At least bundle:list will print out the versions. You can filter the list to make it more easily readable: bundle:list | grep -i modbus
Regarding update, not sure… Perhaps people on this thread would know. The original thread for marketplace is here:
C) Here are some log-Errors, I am not sure, what I can do to avoid this:
Not sure either. If it is with serial devices, it might be something low level even (physical connections).
Personally would not mind too much if the operations succeed with the retries.
Hope someone more knowledgeable can help you…
EDIT: if you like, you can try the scripts similar to posted here, and try if you can reproduce any issues with those. This is more like troubleshooting where the real issue is, in the binding or the device.