Last spring I configured Zigbee2MTQQ (after using ZHA for a while) because I bought some IKEA devices that were better supported on Z2M. It has been working flaslesly since then, but lately (say 3-4 weeks ago) I realized that my IKA STYRBATs (I have a few) stop working after a certain moment.
The first time it happened, I just rebooted my HA server, and the problem went away. It just happened again, so seeing it is a recurring issue, I want to investigate further and find the source of it.
In HA, when I go to the Z2M web interface, I get a message saying:
The add-on is not running. Do you want to start it now?
Doing it result with a message saying:
The add-on seems to not be ready, it might still be starting. Do you want to try again?
When I look into my configs and add-on, all looks in order. But the log of the Mosquitto Broker show this message:
2025-09-22 21:28:51: New connection from 172.30.32.2:57124 on port 1883.
2025-09-22 21:28:51: Client closed its connection.
in the Z2M log, I can see this coming over and over:
*[21:34:09] INFO: Preparing to start…
[21:34:09] INFO: Socat not enabled
[21:34:09] INFO: Starting Zigbee2MQTT…
Starting Zigbee2MQTT without watchdog.
[2025-09-22 21:34:11] info: z2m: Logging to console, file (filename: log.log)
[2025-09-22 21:34:11] info: z2m: Starting Zigbee2MQTT version 2.6.1 (commit #unknown)
[2025-09-22 21:34:11] info: z2m: Starting zigbee-herdsman (6.0.4)
[2025-09-22 21:34:11] warning: zh:ezsp: ‘ezsp’ driver is deprecated and will only remain to provide support for older firmware (pre 7.4.x). Migration to ‘ember’ is recommended. If using Zigbee2MQTT see Improved Ember (EZSP) driver (experimental) · Koenkk/zigbee2mqtt · Discussion #21462 · GitHub
[2025-09-22 21:34:11] error: zh:ezsp:ezsp: Connection attempt 1 error: Error: Error: No such file or directory, cannot open /dev/serial/by-id/usb-Itead_Sonoff_Zigbee_3.0_USB_Dongle_Plus_V2_e4209a60be4bef11965fc2a079f42d1b-if00-port0
[2025-09-22 21:34:16] error: zh:ezsp:ezsp: Connection attempt 2 error: Error: Error: No such file or directory, cannot open /dev/serial/by-id/usb-Itead_Sonoff_Zigbee_3.0_USB_Dongle_Plus_V2_e4209a60be4bef11965fc2a079f42d1b-if00-port0
[2025-09-22 21:34:26] error: zh:ezsp:ezsp: Connection attempt 3 error: Error: Error: No such file or directory, cannot open /dev/serial/by-id/usb-Itead_Sonoff_Zigbee_3.0_USB_Dongle_Plus_V2_e4209a60be4bef11965fc2a079f42d1b-if00-port0
[2025-09-22 21:34:41] error: zh:ezsp:ezsp: Connection attempt 4 error: Error: Error: No such file or directory, cannot open /dev/serial/by-id/usb-Itead_Sonoff_Zigbee_3.0_USB_Dongle_Plus_V2_e4209a60be4bef11965fc2a079f42d1b-if00-port0
[2025-09-22 21:34:41] error: z2m: Error while starting zigbee-herdsman
[2025-09-22 21:34:41] error: z2m: Failed to start zigbee-herdsman
[2025-09-22 21:34:41] error: z2m: Check Zigbee2MQTT fails to start/crashes runtime | Zigbee2MQTT for possible solutions
[2025-09-22 21:34:41] error: z2m: Exiting…
[2025-09-22 21:34:41] error: z2m: Error: Failure to connect
at Ezsp.connect (/app/node_modules/.pnpm/[email protected]/node_modules/zigbee-herdsman/src/adapter/ezsp/driver/ezsp.ts:366:19)
at Driver.startup (/app/node_modules/.pnpm/[email protected]/node_modules/zigbee-herdsman/src/adapter/ezsp/driver/driver.ts:186:13)
at EZSPAdapter.start (/app/node_modules/.pnpm/[email protected]/node_modules/zigbee-herdsman/src/adapter/ezsp/adapter/ezspAdapter.ts:146:16)
at Controller.start (/app/node_modules/.pnpm/[email protected]/node_modules/zigbee-herdsman/src/controller/controller.ts:133:29)
at Zigbee.start (/app/lib/zigbee.ts:67:27)
at Controller.start (/app/lib/controller.ts:101:13)
at start (/app/index.js:149:5)
It looks like the add-on cannot find the Sonoff Dongle. I haven’t changed anything in my config that can affect that.
My system is fully updated with the most recent software, I’m questioning the fact that maybe one update broke something, but I cannot figure out what it could be. Any help will be very appreciated!
Thank you