Starting in late August, my devices stopped responding, one by one. I would go in, re-pair the device, and it would start working again. Then in early September, everything stopped responding at the same time. I have one Hue bulb, five Ikea bulbs of various flavors, two Sengled bulbs, and two Ikea Zigbee repeaters connected to the HE, and usually control everything with Google Home via Nest Hubs and Lenovo Smart Clocks around the house. It's a C-7 hub, running today's 137 firmware.
The HE is on the top floor of a three-storey concrete house, next to a central staircase. The two repeaters are also next to the staircase, one on each of the other floors, to create a sort of corridor of connectivity for the Zigbee network. The HE is in a closet where there also resides a Nest Wifi router.
My system has worked flawlessly for nearly a year, until this little oopsie.
I spent a few hours trying to re-pair all the devices tonight, and most of them failed. It eventually recognized the Sengled bulbs, but none of the Ikea ones. Since the initial pairing with the Hue bulb I haven't been able to re-try, since I don't have any of their other contraptions to reset it with. The two repeaters were eventually paired after several attempts, but neither recognized as what it is - one was "generic Zigbee outlet", and the other was "generic Zigbee device". Even the devices that were able to pair don't respond.
As I sit here writing this I just saw the two Sengled bulbs in the next room turn off and then back on, presumable responding to buttons I pressed on the device page half an hour ago. And now this leads me to wonder if the Ikea bulbs aren't pairing because the HE is so slow their pairing mode times out before the HE finds them.
I've seen posts here about the HE having some kind of massive database problem, and input a secret URL I found to reduce the size of the history. No change. I saw another post about how maybe my Wifi router changed channels and is conflicting with the HE, so I change the Zigbee channel to one at the other end of the list. No change.
Can anyone take a stab at what's going on here? Is my HE broken?