Zigbee2mqtt ember setup - stuck at onboarding

Configuration Zigbee
1

Hi There,

Being a newbe.
just got my new Home Assistant Green a few days ago, and cannot seem to get Zigbee2MQTT loaded properly.

My Setup is a Home Assistant Green + a Zigbee Sonoff Dongle E with ember installed by the vendor, both brand new out of the box.

After viewing all instructions on the net + youtube and trying to set it up, I still stuck at the onboarding.

Here is the logfile:

<[21:51:31] INFO: [32mPreparing to start… [0m
[21:51:31] INFO: [32mSocat not enabled [0m
[21:51:32] INFO: [32mStarting Zigbee2MQTT… [0m
Starting Zigbee2MQTT without watchdog.
Onboarding page is available at http://0.0.0.0:8099/
[2025-09-21 21:52:00] [32minfo [39m: z2m: Logging to console, file (filename: log.log)
[2025-09-21 21:52:00] [32minfo [39m: z2m: Starting Zigbee2MQTT version 2.6.1 (commit #unknown)
[2025-09-21 21:52:00] [32minfo [39m: z2m: Starting zigbee-herdsman (6.0.4)
[2025-09-21 21:52:01] [32minfo [39m: zh:ember: Using default stack config.
[2025-09-21 21:52:01] [32minfo [39m: zh:ember: ======== Ember Adapter Starting ========
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:ezsp: ======== EZSP starting ========
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: ======== ASH Adapter reset ========
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: RTS/CTS config is off, enabling software flow control.
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: ASH COUNTERS since last clear:
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: Total frames: RX=0, TX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: Cancelled : RX=0, TX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: DATA frames : RX=0, TX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: DATA bytes : RX=0, TX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: Retry frames: RX=0, TX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: ACK frames : RX=0, TX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: NAK frames : RX=0, TX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: nRdy frames : RX=0, TX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: CRC errors : RX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: Comm errors : RX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: Length < minimum: RX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: Length > maximum: RX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: Bad controls : RX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: Bad lengths : RX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: Bad ACK numbers : RX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: Out of buffers : RX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: Retry dupes : RX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: Out of sequence : RX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: ACK timeouts : RX=0
[2025-09-21 21:52:01] [32minfo [39m: zh:ember:uart:ash: ======== ASH stopped ========
[2025-09-21 21:52:01] [31merror [39m: zh:ember:uart:ash: Failed to init port with error Error: Error Resource temporarily unavailable Cannot lock port
[2025-09-21 21:52:01] [31merror [39m: z2m: Error while starting zigbee-herdsman
[2025-09-21 21:52:01] [31merror [39m: z2m: Failed to start zigbee-herdsman
[2025-09-21 21:52:01] [31merror [39m: z2m: Check Zigbee2MQTT fails to start/crashes runtime | Zigbee2MQTT for possible solutions
[2025-09-21 21:52:01] [31merror [39m: z2m: Exiting…
[2025-09-21 21:52:01] [31merror [39m: z2m: Error: Failed to start EZSP layer with status=HOST_FATAL_ERROR.
at EmberAdapter.initEzsp (/app/node_modules/.pnpm/[email protected]/node_modules/zigbee-herdsman/src/adapter/ember/adapter/emberAdapter.ts:665:19)
at EmberAdapter.start (/app/node_modules/.pnpm/[email protected]/node_modules/zigbee-herdsman/src/adapter/ember/adapter/emberAdapter.ts:1547:24)
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)
[21:52:03] INFO: [32mPreparing to start… [0m
[21:52:03] INFO: [32mSocat not enabled [0m
[21:52:04] INFO: [32mStarting Zigbee2MQTT… [0m
Starting Zigbee2MQTT without watchdog.

Any help is welcome !

Thanks
Jos

2

Zigbee2mqtt cannot open the port, normally an indication that ZHA (Zigbee Home Automation) is using the port. Disable or uninstall ZHA.

1 Like
3

Thx for your advice Francis.
I feel it’s going to the right direction but it’s still not working for the moment.

Now I see just one error in the log which says:

info: z2m: Connecting to MQTT server at mqtt://core.mosquitto:1883
[2025-09-22 21:59:35] error: z2m: MQTT failed to connect, exiting… (getaddrinfo ENOTFOUND core.mosquitto)
4

Did you install the mosquitto add-on ? Create a user and password ?

5

Currently, all ZBDongle-E devices come pre-flashed with the 7.4.4 Zigbee NCP firmware from the factory.
However, just to be safe, please use Sonoff Dongle Flasher - SONOFF Dongle to connect to the dongle and verify that the firmware currently flashed on it is the Zigbee NCP firmware.

6

Yes, that’s done

7

Seems the add-on is not found. Maybe try a full reboot (not just a HA restart)

8

OK this evening when I’m back home.
Indeed I’ve restarted HA different times but didn’t a reboot.