Zigbee2MQTT to ZHA switch over killed some of my wifi devices?

Hi all,

Really hope someone else’s brain’s can figure this out as this problem is driving me nuts!

Problem: Last night, I attempted to switch from using Zigbee2MQTT to ZHA and at the same time switched my Zigbee co-ordinator from a generic CC2531 adaptor to a SONOFF Zigbee 3.0 USB Dongle Plus ZBDongle-P.

I did NOT create a backup of my zigbee network and I (perhaps stupidly) did not disable the MQTT integration or Zigbee2MQTT Add-on during the co-ordinator switch and ZHA setup.

Now, my Zigbee devices that I have paired so far with the new co-ordinator are working absolutely fine. But a seemingly random selection of my Wifi devices appear to be consistently unavailable.

Examples:

  • I have 2 identical generic Tuya lightbulbs. One is working as normal with localTuya, the other shows as unavailable (despite working with the Tuya cloud integration, and working fine in the Tuya app).

  • My Kasa wifi smart bulb and my Shelly 1L are unavailable despite working fine in their respective apps. However, my LIFX bulb and my Yeelight bulbs are working as normal.

Things I have tried:

  • Unplugging Sonoff co-ordinator as it was plugged directly into my Raspberry pi in case interference with wifi signals was somehow the cause.

  • Restored both a partial and full previous backup in case rolling back would regain the functionality. (I had earlier that evening installed 2022.9.0 but had no problems until after ZHA migration).

  • Attempting to remove and re-add some of the devices in case simply readding the device/integration would fix the problem.

  • Uninstalling Zigbee2MQTT add-on and MQTT integration

Conclusion:

I feel like I am running out of things to try! Could this be an issue with tokens? Some are now invalid and therefore some devices simply can’t communicate with Home Assistant despite working fine in their own apps?

I would be greatful for any help or insight anyone can provide. I am happy to provide relevant log files etc. if they would be useful but must admit I’m not sure what info might be helpful here!

ZigBee and WiFi run on the same 2.5ghz frequencies. Since you have changed coordinators it is very possible you now have moved your ZigBee devices into a frequency that is causing interference with your WiFi devices. Here is some information about that fact:

I would recommend making sure that your 2.4ghz WiFi network and your ZigBee network are on frequencies that don’t overlap.

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Thank you so much! Now that I have the answer, this all makes a lot of sense. I think the devices that continued to function are largely ones closer to my router etc. I quite possibly would have been stuck forever on this problem, and you solved it in just a few minutes!