I’ve recently switched from the built in zigbee coordinator in my Home Assistant Yellow to a SMLIGHT SLZB-06 and moved from ZHA to Zigbee2Mqtt.
At first everything seemed fine although some devices would drop off the network every few days. However, after a couple of weeks all of my router devices suddenly went offline. I rebooted the coordinator and the Z2M add-on and everything came back online…only for the problem to repeat itself over and over. The issue has further deteriorated as now Z2M completely fails to restart.
I’ve pasted below what I can see in the add-on logs. I’ve been through this checklist but none of the conditions seem to apply in my situation. I went the extra step of installing the OpenThread Border Router add-on to ensure the built in radio is in Thread only mode, just in case the built in radio’s zigbee signal could be interfering with the SLZB-06.
On reaching out to SMLIGHT they suggested rolling back the coordinator firmware, so it’s currently on 20221226 firmware with no improvements. The last comment from them was:
some device on your network is crashing the coordinator. The Zigbee network can process about one broadcast packet per second, if one of the devices sends more, the coordinator will freeze
I don’t know how to go about identifying if a device is doing this, could anyone advise?
Although I have added a few new zigbee devices to my setup recently, I never experienced this issue when running the built-in zigbee coordinator on ZHA so I’m somewhat skeptical of their comment. (Though I had plenty of other issues with my network, hence the switch!)
My setup:
Home Assistant Yellow running HAOS 2024.7.2
PoE powered SLZB-06 coordinator located in the middle of a two story 140m2 house.
Approx 40 mains powered router devices including 2 IKEA repeaters and 3 Sonoff Dongle P flashed with router firmware
[15:03:30] INFO: Preparing to start...
[15:03:30] INFO: Socat not enabled
[15:03:32] INFO: Starting Zigbee2MQTT...
Starting Zigbee2MQTT without watchdog.
[2024-07-19 15:03:58] error: z2m: Error while starting zigbee-herdsman
[2024-07-19 15:03:58] error: z2m: Failed to start zigbee
[2024-07-19 15:03:58] error: z2m: Check https://www.zigbee2mqtt.io/guide/installation/20_zigbee2mqtt-fails-to-start.html for possible solutions
[2024-07-19 15:03:58] error: z2m: Exiting...
[2024-07-19 15:03:59] error: z2m: Error: Failed to connect to the adapter (Error: SRSP - SYS - ping after 6000ms)
at ZStackAdapter.start (/app/node_modules/zigbee-herdsman/src/adapter/z-stack/adapter/zStackAdapter.ts:101:27)
at Controller.start (/app/node_modules/zigbee-herdsman/src/controller/controller.ts:129:29)
at Zigbee.start (/app/lib/zigbee.ts:63:27)
at Controller.start (/app/lib/controller.ts:139:27)
at start (/app/index.js:154:5)