I’m not sure about the buzzing, but if the items are really how you have them specified, then the first one is wrong. It has a space between the endpoint and the command - it should be a colon -:
This might explain the feedback not working when you press the button - maybe. Alternatively, what association is configured for feedback to the controller?
(I’m not sure about the buzzing issue, but it doesn’t sound good!)
@ewgor:
your 2nd problem is related to the item configuration.
I had the same problem (see above).
You just need to change zwave="3:1:command=SWITCH_BINARY"
to zwave="3:command=SWITCH_BINARY"
somehow OH handles the first relay differently than the second (you need 3:2:command=… at the second)
Thanks guys for help, I made the correction in the first item definition and now it’s updating well!
I still got the buzzing in the device but I took contact with the supplier and hopefully I’ll get a new one or at least a response.