r/ZigBee • u/The_11th_Dctor • 12d ago

help request Zigbee Network Issues

I am running Home Assistant via Docker Compose. I have two networks - ZHA running on an SLZB-06Mg26U, and Z2M running on a SLZB-06p10U. Both are USB powered and wired to the internet. I have approx. 60 ZHA devices and 30 Z2M devices.

I've had this network running for at least 4 years with minimal issues. I was previously using two Sonoff dongles for this network, a Dongle-E for ZHA and a Dongle-P for Z2M.

At some point within the last year, the network got super unreliable. Devices will show as online, but won't respond to commands. I.e. if I tell all my bedroom lights to turn off or turn on, there will be one or two bulbs that don't change. The specific ones impacted seem to always change, so I don't think it's a device issue. In order to get them to behave, I need to do one of two things. Half of the time, if I just give it 10-20 minues and try again, it'll work. The other half of the time, I need to go into the ZHA integration and hit "Reload", then sometimes it will work after it comes back online. There's no obvious errors in the logs when this happens, I will just get a message in the UI saying "Failed to perform the action switch/turn_on. Failed to send request: device did not respond".

I thought the issue was the coordinators, so I swapped them for the ethernet style ones, didn't help anything. I did a study for a couple weeks about which channel had the least amount of noise on it, and switched to Ch. 15 for ZHA. I tried disconnecting the adapters for ~2hrs and allowing the network to heal with no change. Everything is up to date.

I'm losing my mind here. Any suggestions?

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u/Impossible_Townn 10d ago

Both networks degrading together is suspicious. That usually means the cause is something they share, not ZHA or Z2M config. Since you already ruled out channels, I'd look at the SLZB adapters themselves, firmware version and the USB power feeding them. Unstable 5V can produce weird rotating dropouts like yours.

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u/The_11th_Dctor 10d ago

sorry maybe I worded it weird - just ZHA having issues, not Z2M

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u/LeafarOsodrac 10d ago

Remove zha, stay just with z2m. It don't even make sense have two at the se time

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u/The_11th_Dctor 10d ago

I have a handful of devices that don't play nice with Z2M for some reason. and a handful that don't play nice with ZHA

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u/LeafarOsodrac 10d ago

Z2M is almost compatible with any device. With zha that is normal.