I had some issues with devices dropping off, so I turned off ‘Device Health’ and reset ZIgbee network (per some instructions on the forum to remove batteries & power for 15 mins from hub etc). But now I have 6+ devices that will not pair to the hub (all xiaomi door sensors), others work fine, I have reset the hub again (same as above) I have tried manually resetting each of the devices (holding button for 3 x flashes etc) and all usual pairing methods whilst adjacent to hub, tried swapping batteries in devices etc but just nothing showing up in hub ‘events list’ .
My guess (just a guess) is that you’ve ended up adding Devices in a different sequence than previously and a different selection of parents is now available to the door sensors than when they were originally paired, resulting in some child slots not being available this time around.
If so, this should be fixable, but can be very tedious to fix.
For example, from a troubleshooting aspect the surest approach would be to remove all zigbee devices from your network, then start by adding one of the troublesome door sensors near the hub.
If it pairs clean in that setup, it’s very likely a child slot issue, although what your next steps would be, given that SmartThings doesn’t provide any mapping utilities, could involve a lot of additional trial and error.
If the sensor won’t pair even with no other zigbee devices except the hub, then it’s a different issue.
Anyway, the Xiaomi devices are very cheap, but they are only intended to be used with their own Gateway, so they can be idiosyncratic.
I don’t know how much effort you want to be put into this, but if you do want to start troubleshooting you will need to be very precise and patient, and keep notes as you go. A lot of work, I’m afraid.
To start, give us a list of every zigbee device you have (brand and model).
Ideally if I were troubleshooting for myself I’d also Make a floor plan showing positioning but for security and privacy sake it would be a bad idea to post that to a forum. But if you want to do one for yourself it would probably be helpful.
Meanwhile, read the following FAQ as it will help explain why I made my initial guess.
Thanks for taking the time to write that. OK I’ve got lots to consider there - first thing I am going to try a new Xiaomi device I have to see if the fact it i previously unused changes anything.
Also I have some powered Aqara light switches I was suspicious if they could be swamping the network signal , because I found it strange I could not see any events at all listed n the hub for these devices I was trying.
Thanks again for the help , I will try to do some more fault diagnosis and see how it goes.
No it’s in a completely different room, already connected devices are working fine, just wont let me add any more - both ones which have been previously connected or new ones (have just tried a new door sensor and a new temp sensor neither would pair ).
Before doing a full reset, I would get in touch with support and see if they can see anything from their side. And wait to hear from some of the community members who have a lot of experience with Xiaomi devices.
After you deleted the devices, did you do the zigbee heal procedure where you take the hub off of power or 15 or 20 minutes. Once you do that, rebuilding the network can take a while, so I would wait to test the results until the next day.
In the meantime, hopefully some other people will have some additional ideas.
I have the same problem on my Xiaomi and Aqara devices, they are working well two weeks ago, I repair sensor many times, after some hours I have some unavailable again… so I start think about Home-Assistant could be a solution.