@hek [quote]The main reason for the current variable-types has a Vera-controller legacy. It is simply 1-1 mapping to their devices/variables.[/quote] I was knocking my head to the wall to understand why you guys have done this that way. What I'm doing on my controller is to create database tables that will group and relate those variable types to what should be displayed on the user interface. Thanks for the help. I think I can go ahead, but some sensor types are still not clear to me. @Heinz This is what I thought since I started looking at this stuff.

I dont see openHAB requesting any state, so maybe its a better idea to read the state of the output pin immediately after setting the relay and publish this and bind it to a control lamp. If this isnt toggling, the command wasnt received.

Here in Germany the wall boxes are round and have a diameter of about 6 cm and a depth of about 4-6 cm. Compared to that your 10x7x7 box is huge. :) I think I would have to dsign a custom Arduino pcb. Still waiting for someone to do this job.

And for the record, I've fixed a node ID for this sensor and it works locally, turning the lights on/off through the relay, even when the gateway is not reachable (out of range). I will open another thread to check what are the possible issues with this behavior.