Help! 2.4Ghz devices suddenly unresponsive

[Haggisman]

I noticed last night one of my HA automations wasn't turning some lights on, at first I thought it was the automation itself, but - after some fiddling, I realised that all of my WiZ bulbs were unresponsive. At first I thought it was just those bulbs (I only installed them a couple of days ago), but I've since found that all of our Echoes have also lost internet connection, along with my Eufy doorbell and floodlight camera - checking further, it seems that every device on my 2.4GHz network is essentially "dead".

I'm able to "view" some statuses, e.g. of bulbs etc., but it's intermittent, and I can't update anything.

I'm running a UCG-Ultra (with a VM hub 4 in modem mode) and U6 Pro access point with 3 SSIDs: main 5GHz, kids 5GHz and the 2.4GHz (mainly) for IoT stuff - both of these have been rebooted (along with all of the other devices).

The clients are showing mostly good connection status to the wifi (there are a few with poorer connection - e.g. outdoor lights, but they've never had an issue before), however the Unifi dashboard is showing 20% TX retries, which doesn't strike me as good!

Everything wired and on 5GHz is absolutely fine.

Short of resetting everything to default and setting it up again (which I'd rather avoid), any ideas of what to check?!

 

[Haggisman]

Sounds like auto channel optimisation might be enabled and it’s done its thing and now there’s a load of channel overlap.

I did wonder if it had changed the channel and kicked everything off - is there a way to view the channel history?

Edit: nvm, found the logs - last automatic channel change was in August, so not that

BTW no need for separate wifi for yours and kids networks, just use wireless pre shared keys.

It's more so I can apply rules to their devices easily to kick them off the network at bed time etc.

 

[Haggisman]

It's working!

I restored my backup from the start of the month and changed the channel to 11 - not sure what fixed it, but everything seems fine for now *touch wood*.

 

[Haggisman]

Thanks - just strange that it suddenly randomly went from "all fine" to "nothing works"

 

[Haggisman]

Interesting - this happened again yesterday, when I was moving some wiring around while redecorating, which caused the AP to lose connectivity for a while; although in this case it seems it was only my WiZ bulbs which were affected. Changing the channel on the AP back to 6 seemed to fix it instantly. Seems these bulbs really don't like to lose their Wi-Fi connection!