Z2M randomly stopped working with SLZB-06P7

shadow1349 · April 25, 2025, 4:07am

For some reason HA just stopped connecting to my SLZB-06P7 with the following error code:

[22:56:38] INFO: Preparing to start...
[22:56:38] INFO: Socat not enabled
[22:56:38] INFO: Starting Zigbee2MQTT...
Starting Zigbee2MQTT without watchdog.
[2025-04-24 22:56:39] info: 	z2m: Logging to console, file (filename: log.log)
[2025-04-24 22:56:39] info: 	z2m: Starting Zigbee2MQTT version 2.2.1 (commit #unknown)
[2025-04-24 22:56:39] info: 	z2m: Starting zigbee-herdsman (3.4.11)
[2025-04-24 22:56:39] info: 	zh:zstack:znp: Opening TCP socket with 192.168.1.14:6638
[2025-04-24 22:56:39] info: 	zh:zstack:znp: Socket connected
[2025-04-24 22:56:39] info: 	zh:zstack:znp: Socket ready
[2025-04-24 22:56:39] info: 	zh:zstack:znp: Writing CC2530/CC2531 skip bootloader payload
[2025-04-24 22:56:40] info: 	zh:zstack:znp: Skip bootloader for CC2652/CC1352
[2025-04-24 22:56:58] error: 	z2m: Error while starting zigbee-herdsman
[2025-04-24 22:56:58] error: 	z2m: Failed to start zigbee-herdsman
[2025-04-24 22:56:58] error: 	z2m: Check https://www.zigbee2mqtt.io/guide/installation/20_zigbee2mqtt-fails-to-start_crashes-runtime.html for possible solutions
[2025-04-24 22:56:58] error: 	z2m: Exiting...
[2025-04-24 22:56:58] error: 	z2m: Error: Failed to connect to the adapter (Error: SRSP - SYS - ping after 6000ms)
    at ZStackAdapter.start (/app/node_modules/.pnpm/[email protected]/node_modules/zigbee-herdsman/src/adapter/z-stack/adapter/zStackAdapter.ts:113:27)
    at Controller.start (/app/node_modules/.pnpm/[email protected]/node_modules/zigbee-herdsman/src/controller/controller.ts:136:29)
    at Zigbee.start (/app/lib/zigbee.ts:69:27)
    at Controller.start (/app/lib/controller.ts:104:13)
    at start (/app/index.js:149:5)

I’ve made sure that the SLZB-06P7 is on, it is reachable from the network, and is functioning well. I’ve restarted it, and I’ve re-flashed the firmware. I’ve also restarted HA, and I’ve restarted Z2M about a million times and it still has the same error. I’ve checked the configuration and it’s all correct but it’s still not working.

Here is my HA version

Core 2025.4.3
Supervisor 2025.04.0
Operating System 15.2
Frontend 20250411.0

And the SLZB-06P7 is on version 2.8.5.dev7.

Has anyone else encountered this error and know how to fix it?

Neil_Brownlee · April 25, 2025, 7:57am

Can you post your Z2M configuration.yaml?

ShadowFist · April 25, 2025, 4:55pm

One of your error lines tells you exactly where you can troubleshoot and fix the error:

[2025-04-24 22:56:58] error: z2m: Check Zigbee2MQTT fails to start/crashes runtime | Zigbee2MQTT for possible solutions

Error: SRSP - SYS - ping after 6000ms is usually caused by the ZHA integration running after autodetecting your coordinator, but check the link in the error for other possible causes.

shadow1349 · April 25, 2025, 11:37pm

Yeah I checked that and followed the guides which is why I had reset and restarted everything. No dice.

shadow1349 · April 25, 2025, 11:39pm

Here’s my configuration. It’s mostly just pasted from the SLZB-06P7

data_path: /config/zigbee2mqtt
socat:
  enabled: false
  master: pty,raw,echo=0,link=/tmp/ttyZ2M,mode=777
  slave: tcp-listen:8485,keepalive,nodelay,reuseaddr,keepidle=1,keepintvl=1,keepcnt=5
  options: "-d -d"
  log: false
mqtt: {}
serial:
  port: tcp://192.168.1.14:6638
  baudrate: 115200
  adapter: zstack
  disable_led: false
advanced:
  transmit_power: 20

GM80 · May 6, 2025, 9:57pm

Any luck on this? I have the same issue, checked the config, restarted HA, Z2M or the Zigbee adapter itself, even tried a SLZB-06P7 firmware update after it failed. The update from Z2M 2.2.1 to 2.3.0 did not work either…

SLZB-06P7 logging shows the following constantly.
[23:54:42] taskZB | New client: 192.168.1.195 id: 0
[23:55:00] taskZB | Client disconnected, id: 0

Changing the adapter type from zstack to ember or ezsp and back to zstack does not make a difference
I’m running HA 2025.4.2 (or 2025.4.4), with Z2M 2.2.1 (or 2.3.0). I’m using HA in a Virtual Machine

Error:

[2025-05-06 23:54:59] error: 	z2m: Error while starting zigbee-herdsman
[2025-05-06 23:54:59] error: 	z2m: Failed to start zigbee-herdsman
[2025-05-06 23:54:59] error: 	z2m: Check https://www.zigbee2mqtt.io/guide/installation/20_zigbee2mqtt-fails-to-start_crashes-runtime.html for possible solutions
[2025-05-06 23:54:59] error: 	z2m: Exiting...
[2025-05-06 23:54:59] error: 	z2m: Error: Failed to connect to the adapter (Error: SRSP - SYS - ping after 6000ms)
    at ZStackAdapter.start (/app/node_modules/.pnpm/[email protected]/node_modules/zigbee-herdsman/src/adapter/z-stack/adapter/zStackAdapter.ts:114:27)
    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)
    at start (/app/index.js:149:5)
    at start (/app/index.js:149:5)
    at start (/app/index.js:149:5)

shadow1349 · May 13, 2025, 11:04am

Sorry no, still experiencing a lot of instability with zigbee. Now the whole system seems to be going up in flames. I can barely get it to start the supervisor seems to be completely borked after the latest update.

kolyfan · June 25, 2025, 6:40pm

I have completely the same issue. Even moved from HA add-on to standalone installation on ubuntu VM in docker - but issue the same. Now helps only switching off SLZB-06P7 for 10+ seconds and switch on it back. But this happens almost each day - so not a fun

kolyfan · July 8, 2025, 6:55am

Rolled back to non-dev zigbee firmware (20240315) - 4 days - no disconnections. OS version is latest. Tried latest zigbee firmware (20250325) and older one (20240716) - after about 24 hours got disconnections. And this is strange, because I was using 20240716 for several months before and there were no issues.

coalfield · July 23, 2025, 9:25pm

Same issue here with SLZB-06P, driving me potty. I can get it started with random reboots of the SLZB, Zigbee restarts and Z2M reboots but the network is not very responsive. i have tried various firmwares but currently looking like this device is just too flakey, assuming its the SLZB but I have followed their recommended config so really cant see why there should be an issue. I am running it TCP/IP

[2025-07-23 21:27:17] error:    z2m: Failed to start zigbee-herdsman
[2025-07-23 21:27:17] error:    z2m: Check https://www.zigbee2mqtt.io/guide/installation/20_zigbee2mqtt-fails-to-start_crashes-runtime.html for possible soluti>
[2025-07-23 21:27:17] error:    z2m: Exiting...
[2025-07-23 21:27:17] error:    z2m: Error: Failed to connect to the adapter (Error: SRSP - SYS - ping after 6000ms)
    at ZStackAdapter.start (/opt/zigbee2mqtt/node_modules/.pnpm/[email protected]/node_modules/zigbee-herdsman/src/adapter/z-stack/adapter/zStackAdapter.ts>
    at Controller.start (/opt/zigbee2mqtt/node_modules/.pnpm/[email protected]/node_modules/zigbee-herdsman/src/controller/controller.ts:133:29)
    at Zigbee.start (/opt/zigbee2mqtt/lib/zigbee.ts:71:27)
    at Controller.start (/opt/zigbee2mqtt/lib/controller.ts:102:13)
    at start (/opt/zigbee2mqtt/index.js:149:5)```

Olivier974 · October 5, 2025, 6:33pm

Hello,

any news please? i am in the same boat, i notice that the only solution is to unplug ethernet cable to make it work again…( i use POE not USB to power the SLZB)

if i SOFTWARE restart the SLZB, because its accessible with his web server, it doesnt work, only a total reset (power restart) work…very strange…seems to be a socket problem.

i think the problem is not related to Z2M but with ethernet of the SLZB, but i could be wrong…

any help or ideas will be appreciated, thanks

[2025-10-05 22:02:47] error: 	z2m: Error while starting zigbee-herdsman
[2025-10-05 22:02:47] error: 	z2m: Failed to start zigbee-herdsman
[2025-10-05 22:02:47] error: 	z2m: Check https://www.zigbee2mqtt.io/guide/installation/20_zigbee2mqtt-fails-to-start_crashes-runtime.html for possible solutions
[2025-10-05 22:02:47] error: 	z2m: Exiting...
[2025-10-05 22:02:47] error: 	z2m: Error: Failed to connect to the adapter (Error: SRSP - SYS - ping after 6000ms)
    at ZStackAdapter.start (/app/node_modules/.pnpm/[email protected]/node_modules/zigbee-herdsman/src/adapter/z-stack/adapter/zStackAdapter.ts:115:27)
    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)

a good option to test : https://community.home-assistant.io/t/z2m-starting-zigbee2mqtt-without-watchdog/842447/5?u=olivier974

fleskefjes · October 6, 2025, 1:47pm

I run my SLZB06p7 on 20240716 / 2.9.4 and I don’t have any disconnect issues. 80+ devices in the mesh.

Olivier974 · October 6, 2025, 2:02pm

thanks for your reply, i have the latest…3.0.6, not sure i wanna downgrade…

fleskefjes · October 6, 2025, 2:03pm

If you are having issues I would give it a try.

Olivier974 · October 6, 2025, 2:04pm

i only see 2.9.8 and 2.8.7…i dont have 2.9.4 option

i have 107 devices…perhaps too much for an esp32 powered router…

fleskefjes · October 6, 2025, 2:06pm

I see the same thing here. 107 devices should not be a problem.

Olivier974 · October 6, 2025, 2:08pm

pehaps my problem is not firmware related…i have flash again 3.0.6 to try, i read that in the docs…will see…

thanks for your help!

fleskefjes · October 6, 2025, 2:11pm

I’ve had my share of Zigbee issues, what helped me was to relocate the SLZB to a more central location in my house.

Olivier974 · October 6, 2025, 2:14pm

mine is already at the center, perhaps i will try to move at another location, but not a lot of choice because of limited ethernet socket

i have nothing too close of the router…perhaps a esphome device who use wifi…need to move it…

Olivier974 · October 11, 2025, 8:12pm

hello, i install 20250321 firmware with 3.0.6 zlsb os and its rock solid for 4 days now