I’m quite new to Openhab and still figuring out how to setup certain things.
I have setup the ZigBee binding to work with a CC2531 dongle. I am able to control a Ikea tradfri Light bulb without problems. The reason I want to use zigbee over, for example, RF433 controlled devices is that ZigBee supports two way communication. I would expect that if I try to switch on the light when it is disconnected from the mains a warning is given that the device is offline.
From the Paper UI the lightbulb indicates online even if it is not powered at all.
This also triggers a more generic question… How can I configure Openhab that my other items, like temperature sensors, are checked if they are still online.
The problem is that the Thing does not go offline at all when I disconnect it from the mains. The same holds for the zigbee coordinator (CC2531EMK Coordinator). When I pull out the USB dongle the Thing status remains online. To me this seems more a problem in the binding. Is there a specific catagory in the forum when I can address this issue?
Related to this polling cycle… how long is this by default? Can I set this to a specific value?
Great article, thanks! I got the expire binding to work for checking if my MQTT sensors are still online.