Maximum # devices on zzh stick with zigbee2mqtt?

Configuration Zigbee
1

I have 114 devices now connected to my ZZH stick with zigbee2mqtt.
I have 3 dedicated zigbee routers but also half of the devices are bulbs and sockets that also act as router.

With this number I experience that devices randomly loose their connection and need to reconnect with power cycle or repair.

This looks similar like when I got more then 40 devices on the basic CC2531 stick until that became unstable. Does that mean that I have reached the maximum for the ZZH stick?

Are there people with more devices connected to this stick or experience the same?

2

In our experience, more than 150 devices on the CC2652 cause significant delays. Therefore, it is better to divide the network into several segments. In the case of simple sensors with rare data sending and a small number of clusters, the network will work up to 200.

3

Got an alike situation, many years later. Currently there are 114 online devices (type in “online” in the z2h-frontend), and got quite some problems.

  • It freezes more often, now I’ve added more devices. The LED on the ZZH-stick does not always turn on. I can only unfreeze when I restart Z2M from the frontend. Then I get no count-down when I click “allow pairing”, but no problem to be seen in the logs. I sometimes need a few reboots to get it back online, but since I also got problems with the SSD-hat, it drives me crazy right now.
  • It should have over 125 devices online, but devices disconnect easily now. Especially Ikea lamps disconnect.
  • Showing the map in Z2M takes longer than 10 minutes - I stopped checking, so maybe it never loads.

So I think the limit is about 110 devices for the ZZH-stick. I therefore picked the ZigStar UZG-01, as this one should have two fewer problems:

  • 300 connected devices, as it’s CC2652P7 based
  • connection via network, and thus I can reboot the Raspberry Pi without loosing devices then.

It arrives next week, so I hope it solves it.

4

Just received the UZG-01 and upgraded to latest XZG firmware. And wow, this one has a great reaction time!! I could almost make a stroboscope! Also z2m was much more responsive than with ZZH.

After some testing, I also upgraded to the recently released Zigbee2mqtt 2.0, but it needed one missing line adapter: zstack to make it work.

Now adding back my offline devices, and not hitting any device-limit.

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