All zigbee devices will not connect / are now not working

[JDRoberts]

GE Links are flaky. Nothing to do with smartthings, except that it’s the reason why they are not on the official compatibility list. But they should still pair, they just might drop off later.

FAQ: GE Link Bulbs Dropped Offline

GE Links are the least expensive big brand zigbee bulbs you can buy, and, for whatever reason, they seem to sometimes have trouble reconnecting to the SmartThings network after power has been cut, whether it’s from a whole house failure or just someone flipping a switch. Or even just randomly from time to time. (SmartThings staff have confirmed in the forums that the reason the GE links are not on the official “works with SmartThings” compatibility list is that they have a firmware problem which causes them to stop responding to the Cordinator from time to time. Supposedly GE is aware of the issue and there may be a firmware update from GE in a few months, but no specific timeline and they can’t be certified as compatible yet. Meanwhile, they’re very inexpensive, but they do drop off fro…

One thing about zigbee is that it can be subject to interference from Wi-Fi, particularly boosted Wi-Fi. Ideally your hub should be at least 3 m from any Wi-Fi router or extension point. But if your other zigbee devices are working fine, then that’s probably not it.