UPDATE: Got it working. Moved the Hubitat closer to the wall switch box where the ZBMINI is. Then retried the syncing a few times. It's connected now.
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I have 2 ZBmini-L no-neutral switches installed. Initially installed and worked fine. After many months of inactivity (low use room), one stopped. The other is in my office and is higher use, and it is fine. The low use one has had to "repeat" via an S31, but even with 2 in nearly proximity -- no luck.
I can delete and re-pair ok, but the install never shows "power", and the switch cannot be toggled -- no Hubitat sees it (sometimes?) and but won't toggle.
Moving closer is harder as the house is large, so I'm wondering if anyone has tried a Sonoff Repeater to try to get the RF coverage that it appears to need.
Oh - old house, metal switches boxes don't help, but the S31s are reasonably in-line with the open portion of the box and it should work.
All the other details folks report are pretty much common here.
Ideas?
In order to diagnose it, I opened the box with the switch and pulled it out, then plugged my C7 into a power bank, and used a cable to connect to a local hub/switch 10 feet from the switch.
Config worked. It was able to be operated from the dashboard and using the web interface.
So, I unplugged the closest S31 socket, and it lost connection. This one was 5 feet away from the ZBmini-L, and the one about 12 feet away (on the other side of a wall) failed to pick it up. Plugged it back in, all is happy.
Relocated the C7 to its original room in the basement, but put it up high above all things blocking except the ceiling. Worked ok -- as long as the S31 is close.
So, my conclusion is this -- if the ZBmini-L doesn't work after being config'd in close proximity, then it needs a repeater. A S31 will do it, but a pure repeater may be better if being tucked out of sight.
These have been completely unreliable for me. I have a bunch of of the traditional ZBminis that work 99% of the time. These are useless.
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It sucks that some have had no joy with these. Everyone's experience varies. As a mere data point for others. I have 2 of these in place and they have been rock solid. My only complaint if I had to make one is the relay click is pretty loud as others have noted. I use them in switches that were terribly placed so the audible click is not a deal breaker for me. The price was right as well. Got a 4 pack from Walmart making them just over $9 each. C7 on latest firmware using the generic zigbee driver.
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