Device didn’t respond to ota request. Have you tried deleting the z2m switch and then reinstating it by pressing the button 4 times?

If that’s not enough, you’re really going to have to go further in the debugging process.

Maybe a lead here : https://github.com/Koenkk/zigbee2mqtt/issues/10666

If that doesn’t help, it would be great if you could give more info about your switch model, its version, and more logs if you can.

When I arrived at home assistant, I appreciated the simplicity of zha, without knowing z2m. When I switched from sonoff v1 (no matter) to skyconnect, I wanted to test z2m out of curiosity. Apart from the slightly longer configuration, it’s a real pleasure. The support for firmware updates is very practical. There are far more parameters available for each device. The only negative point is that it takes longer to start up than zha, but that’s not really a big deal. I don’t regret switching from zha to z2m at all.

Hi,

See if it’s a firmware version problem like on the styrbar. Another clue: on bulbs of the same model, I had an upgrade error via z2m blocked at 4%, I had to turn off the power completely, wait for the timeout and restart the upgrade for it to work.

If that’s not it either, the logs are a good lead.

https://community.home-assistant.io/t/ikea-styrbar-force-ota-if-on-v1-0-024/528715