2.11.0

[Koenkk]

Feel free to discuss the 2.11.0 release here!

[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