2.11.0 and 2.12.0

[Koenkk]

Feel free to discuss the 2.11.0 and 2.12.0 release here!

Note that 2.12.0 is a hot-fix release to fix the MALFORMED_COMMAND error when updating Philips Hue devices (#32168)

[osky-media]

Hi all, I've now tried this twice with the same outcome, both times it knackered my ZigBee connection.

GOT THIS ERROR IN THE LOGS

[2026-05-31 16:14:10] error: zh:ember:ezsp: ERROR Transaction failure; status=ASH_ERROR_TIMEOUTS. Last Frame: [FRAME: ID=52:"SEND_UNICAST" Seq=199 Len=10]. 
[2026-05-31 16:14:10] info: zh:ember:uart:ash: ======== ASH stopped ======== 
[2026-05-31 16:14:10] info: zh:ember:ezsp: ======== EZSP stopped ======== 
[2026-05-31 16:14:10] info: zh:ember: ======== Ember Adapter Stopped ======== 
[2026-05-31 16:14:10] error: z2m: Adapter disconnected, stopping 
[2026-05-31 16:14:10] info: z2m: Stopping Zigbee2MQTT (restart=false, code=2, signal=undefined) 
[16:14:51] INFO: Preparing to start... 
[16:14:51] INFO: Socat not enabled 
[16:14:51] INFO: Starting Zigbee2MQTT... 
Starting Zigbee2MQTT without watchdog. 
[2026-05-31 16:14:51] info: z2m: Logging to console, file (filename: log.log) 
[2026-05-31 16:14:51] info: z2m: Starting Zigbee2MQTT version 2.10.1 (commit #unknown) 
[2026-05-31 16:14:51] info: z2m: Starting zigbee-herdsman (10.0.7)
[2026-05-31 16:14:52] info: zh:ember: Using default stack config.
[2026-05-31 16:14:52] info: zh:ember: ======== Ember Adapter Starting ======== 
[2026-05-31 16:14:52] info: zh:ember:ezsp: ======== EZSP starting ======== 
[2026-05-31 16:14:52] info: zh:ember:uart:ash: ======== ASH Adapter reset ========
[2026-05-31 16:14:52] info: zh:ember:uart:ash: Socket ready 
[2026-05-31 16:14:52] info: zh:ember:uart:ash: ======== ASH starting ======== 
[2026-05-31 16:14:57] info: zh:ember:uart:ash: ======== ASH Adapter reset ======== 
[2026-05-31 16:14:57] info: zh:ember:uart:ash: ======== ASH starting ======== 
[2026-05-31 16:15:02] info: zh:ember:uart:ash: ======== ASH Adapter reset ======== 
[2026-05-31 16:15:02] info: zh:ember:uart:ash: ======== ASH starting ======== 
[2026-05-31 16:15:07] info: zh:ember:uart:ash: ======== ASH Adapter reset ======== 
[2026-05-31 16:15:07] info: zh:ember:uart:ash: ======== ASH starting ======== 
[2026-05-31 16:15:12] info: zh:ember:uart:ash: ======== ASH Adapter reset ======== 
[2026-05-31 16:15:12] info: zh:ember:uart:ash: ======== ASH starting ========
[2026-05-31 16:15:17] error: z2m: Error while starting zigbee-herdsman 
[2026-05-31 16:15:17] error: z2m: Failed to start zigbee-herdsman 
[2026-05-31 16:15:17] error: z2m: Check https://www.zigbee2mqtt.io/guide/installation/20_zigbee2mqtt-fails-to-start_crashes-runtime.html for possible solutions 
[2026-05-31 16:15:17] error: z2m: Exiting... 
[2026-05-31 16:15:17] error: z2m: Error: Failed to start EZSP layer with status=HOST_FATAL_ERROR. at EmberAdapter.initEzsp (/app/node_modules/.pnpm/zigbee-herdsman@10.0.7/node_modules/zigbee-herdsman/src/adapter/ember/adapter/emberAdapter.ts:666:19) at EmberAdapter.start (/app/node_modules/.pnpm/zigbee-herdsman@10.0.7/node_modules/zigbee-herdsman/src/adapter/ember/adapter/emberAdapter.ts:1538:24) at Controller.start (/app/node_modules/.pnpm/zigbee-herdsman@10.0.7/node_modules/zigbee-herdsman/src/controller/controller.ts:146:29) at Zigbee.start (/app/lib/zigbee.ts:70:27) at Controller.start (/app/lib/controller.ts:111:29) at start (/app/index.js:156:5)

Device model: SLZB-MR4U - MCU: 0 - OS version: v3.3.3.dev1 - ZB Chip: 0 - ZB FW mode: 0 - ZB FW version: 20260416

Got in touch with SMLIGHT

This was their response

Flash this EFR32 firmware https://github.com/Nerivec/silabs-firmware-recovery/blob/main/gbl-builds/EFR32MG26B420F3200IM48_nvm3_clear_134217728_3276800_8192_134242304_40960.gbl

After that reflash back to 20260416

WORKED

I just can't understand how updating the to this version messed everything up.

Could anyone shed some light please.

[Nerivec]

Starting Zigbee2MQTT version 2.10.1

Doesn't appear to be related to this version, logs show you're still on 2.10.1, not 2.11.0.

[osky-media]

Ok what i meant to say it was all working fine on version 2.10.1, then it updated to the latest version and it all went to shit !!!, i then proceeded to remove the whole thing, to reflash the MR4U etc, so at the time i sent the logs i was possibly back at version 2.10.1 and it wasnt working.
So then I followed the exact thing that SMLIGHT sent to me and it all started to work straight off again, so today i thought ill give the new 2.11.0 another go and guess what it knackered it all up again !!

[Nerivec]

Moved to #32178

[x-Felix]

After upgraded to 2.12, one device became unavailable (IKEA TRADFRIbulb). I have to power cycle it to bring it back. Then the whole zigbee mesh broke off. Devices each after each getting a very low LQI. Let’s see whether it will heal itself.

[x-Felix]

i have to stop z2m docker, unplug sonoff pmg24 (v2025.12.3-pre1)usb dongle then plug it again. start z2m docker. LQI now is starting to improve.

[chris-1243]

I have a setup close to yours

• SLZB-07MG24 (usb) with 2025.12.3-pre1 as a firmware
• Some IKEA TRADFRI bulbs
• Z2M in a Docker container

and I did not encounter any troubles updating Z2M from 2.11.0 to 2.12.0.

What was the previous firmware you were using before 2025.12.3-pre1 (9.0.2 GA) ? As stated by Nerivec in

• https://github.com/Nerivec/silabs-firmware-builder/releases/tag/v2025.12.2-pre2

maybe your coordinator has suffered some NVM memory corruption or any kind of troubles after the restart of the container. I would do a full backup of your stick, ensure there is a coordinator_backup.json in your app/data folder and use this tool to clear the NVM and flash the 2025.12.3-pre1 firmware again.

[andrei-lazarov]

Z2M 2.12.0 has a breaking change for Third Reality vibration sensor 3RVS01031Z !

• vibration was renamed to alarm_1
  Enhance Third Reality device attributes and limits zigbee-herdsman-converters#12400

You must update your automations to use the new, correct entity.

[buymorebuy]

My old Orvibo scene switch stopped working after the update.
It was added via external converters.
Can you tell me why? What is no longer supported?
Everything works fine in version 2.10.1.

const exposes = require('zigbee-herdsman-converters/lib/exposes');
const fz = require('zigbee-herdsman-converters/converters/fromZigbee');
const e = exposes.presets;

const definition = {
    zigbeeModel: ['cef8701bb8664a67a83033c071ef05f2'],
    model: 'T20S3Z',
    vendor: 'ORVIBO',
    description: '3 button scene switch',

    fromZigbee: [fz.orvibo_raw_2],

    toZigbee: [],

    exposes: [
        e.action([
            'button_1_click','button_1_hold','button_1_release',
            'button_2_click','button_2_hold','button_2_release',
            'button_3_click','button_3_hold','button_3_release'
        ])
    ],
};

module.exports = definition;