Installed ZBT-2 to my Yellow, and now all my light bulbs sporadically won't work

Configuration Zigbee
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1

Hi everyone.

Not entire sure where to start, but I bought a ZBT-2 in order to move over to that from the Yellows internal radio.
Using the internal radio everything worked with no issue in Z2M, but after installing ZBT-2 and pointing Z2M towards that more or less all the lights in house stopped working. My lights from IKEA have been fine for a day after reconnecting them (they’ve stopped working again now) and my Hue lights have just been fully unresponsive since shifting.

Z2M reports the following:


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[27/01/2026, 20.21.33] z2m: Publish 'set' 'brightness' to 'Loftslampe (TV stuen)' failed: 'Error: ZCL command 0x001788010de8f3b3/11 genLevelCtrl.moveToLevelWithOnOff({"level":43,"transtime":0,"optionsMask":0,"optionsOverride":0}, {"timeout":10000,"disableResponse":false,"disableRecovery":false,"disableDefaultResponse":false,"direction":0,"reservedBits":0,"writeUndiv":false}) failed (Delivery failed for '6955'.)'

[27/01/2026, 20.22.34] z2m: Publish 'set' 'state' to 'Spejl (badeværelse)' failed: 'Error: ZCL command 0x001788010bf290d2/11 genOnOff.off({}, {"timeout":10000,"disableResponse":false,"disableRecovery":false,"disableDefaultResponse":false,"direction":0,"reservedBits":0,"writeUndiv":false}) failed (Delivery failed for '59921'.)'

[27/01/2026, 20.22.34] z2m: Publish 'set' 'state' to 'Lysekrone 3 (entre)' failed: 'Error: ZCL command 0xb4e3f9fffe0c23e4/1 genOnOff.off({}, {"timeout":10000,"disableResponse":false,"disableRecovery":false,"disableDefaultResponse":false,"direction":0,"reservedBits":0,"writeUndiv":false}) failed (Delivery failed for '5607'.)'

[27/01/2026, 20.22.34] z2m: Publish 'set' 'state' to 'Lysekrone 1 (entre)' failed: 'Error: ZCL command 0xb4e3f9fffeacd6e6/1 genOnOff.off({}, {"timeout":10000,"disableResponse":false,"disableRecovery":false,"disableDefaultResponse":false,"direction":0,"reservedBits":0,"writeUndiv":false}) failed (Delivery failed for '33530'.)'

[27/01/2026, 20.22.34] z2m: Publish 'set' 'state' to 'Lysekrone 2 (entre)' failed: 'Error: ZCL command 0xb4e3f9fffe0c0984/1 genOnOff.off({}, {"timeout":10000,"disableResponse":false,"disableRecovery":false,"disableDefaultResponse":false,"direction":0,"reservedBits":0,"writeUndiv":false}) failed (Delivery failed for '33479'.)'

I am far out of my depth on this, so I have someone on here knows what is going on, or if other pepole have had similiar issue.

2

That sounds like you did not folle this guide?

3

Sorry, forgot to mention that. Yes I updated it with the firmware for Z2M and followed those steps.

It says it’s running the following firmware: : EmberZNet Zigbee 7.4.4.6

4

And you also read this:

  • Info You won’t be able to control the devices until they rejoin the network.
  • Normally, they rejoin within one hour.
  • You may be able to accelerate that process by power-cycling devices.
5

I did not read that, but it’s been close to 36 hours and they went from working to not working, so it’s going the opposite direction.

Since I am using Z2M, do I need to force the rejoin process manually?

6

I don’t use Z2M, so this is something some one else should be able to answer better.

Most important is that devices routing for others are in the network since other devices depend on them for their connection.

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