Zigbee2MQTT wont start after onboarding

[18:29:35] INFO: Preparing to start...
[18:29:35] INFO: Socat not enabled
[18:29:35] INFO: Starting Zigbee2MQTT...
Starting Zigbee2MQTT without watchdog.
[2025-05-29 18:29:36] info: 	z2m: Logging to console, file (filename: log.log)
[2025-05-29 18:29:36] info: 	z2m: Starting Zigbee2MQTT version 2.3.0 (commit #unknown)
[2025-05-29 18:29:36] info: 	z2m: Starting zigbee-herdsman (4.0.0)
[2025-05-29 18:29:36] info: 	zh:adapter:discovery: Matched adapter: {"path":"/dev/ttyUSB0","manufacturer":"Itead","serialNumber":"ac3ff750b539ef11bf1651f454516304","pnpId":"usb-Itead_Sonoff_Zigbee_3.0_USB_Dongle_Plus_V2_ac3ff750b539ef11bf1651f454516304-if00-port0","vendorId":"10c4","productId":"ea60"} => ember: 4
[2025-05-29 18:29:36] info: 	zh:ember: Using default stack config.
[2025-05-29 18:29:36] info: 	zh:ember: ======== Ember Adapter Starting ========
[2025-05-29 18:29:36] info: 	zh:ember:ezsp: ======== EZSP starting ========
[2025-05-29 18:29:36] info: 	zh:ember:uart:ash: ======== ASH Adapter reset ========
[2025-05-29 18:29:36] info: 	zh:ember:uart:ash: RTS/CTS config is off, enabling software flow control.
[2025-05-29 18:29:36] info: 	zh:ember:uart:ash: Serial port opened
[2025-05-29 18:29:36] info: 	zh:ember:uart:ash: ======== ASH starting ========
[2025-05-29 18:29:37] info: 	zh:ember:uart:ash: ======== ASH connected ========
[2025-05-29 18:29:37] info: 	zh:ember:uart:ash: ======== ASH started ========
[2025-05-29 18:29:37] info: 	zh:ember:ezsp: ======== EZSP started ========
[2025-05-29 18:29:37] error: 	z2m: Error while starting zigbee-herdsman
[2025-05-29 18:29:37] error: 	z2m: Failed to start zigbee-herdsman
[2025-05-29 18:29:37] error: 	z2m: Check https://www.zigbee2mqtt.io/guide/installation/20_zigbee2mqtt-fails-to-start_crashes-runtime.html for possible solutions
[2025-05-29 18:29:37] error: 	z2m: Exiting...
[2025-05-29 18:29:37] error: 	z2m: Error: Adapter EZSP protocol version (8) is not supported by Host [13-16].
    at EmberAdapter.emberVersion (/app/node_modules/.pnpm/[email protected]/node_modules/zigbee-herdsman/src/adapter/ember/adapter/emberAdapter.ts:1417:19)
    at EmberAdapter.initEzsp (/app/node_modules/.pnpm/[email protected]/node_modules/zigbee-herdsman/src/adapter/ember/adapter/emberAdapter.ts:670:9)
    at EmberAdapter.start (/app/node_modules/.pnpm/[email protected]/node_modules/zigbee-herdsman/src/adapter/ember/adapter/emberAdapter.ts:1548:24)
    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:70:27)
    at Controller.start (/app/lib/controller.ts:104:13)
    at start (/app/index.js:149:5)

Getting this error, thank you. I’ve already rebooted my HAOS.

Your Sonoff Dongle Plus V2’s firmware needs to be updated.

This person had the same problem.

https://www.reddit.com/r/Zigbee2MQTT/comments/1htb991/zigbee2mqtt_error_adapter_ezsp_protocol_version_8/

Information about upgrading the device’s firmware is documented here: