Problem to connect to SLZB-06 after running for some months

I have a strange problem, after some month zigbee2mqtt adsdon in hass cant connect to my SLZB-06.

Restart of addon, hass or reboot of SLZB-06 dosen’t solve the issue.
The only way to fix it is to pull out the power to the SLZM-06

SLZM-06 have a static ip, and the SLZM-06 web page works as it should.
I can ping the SLZM-06 when connected to hassio over ssh so not network issue.

Anyone with the same issue ?

Logs from the addon.

[2026-01-15 19:21:25] info: 	zh:zstack:znp: Writing CC2530/CC2531 skip bootloader payload
[2026-01-15 19:21:26] info: 	zh:zstack:znp: Skip bootloader for CC2652/CC1352
[2026-01-15 19:21:44] error: 	z2m: Error while starting zigbee-herdsman
[2026-01-15 19:21:44] error: 	z2m: Failed to start zigbee-herdsman
[2026-01-15 19:21:44] error: 	z2m: Check https://www.zigbee2mqtt.io/guide/installation/20_zigbee2mqtt-fails-to-start_crashes-runtime.html for possible solutions
[2026-01-15 19:21:44] error: 	z2m: Exiting...
[2026-01-15 19:21:44] 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:107:27)
    at Controller.start (/app/node_modules/.pnpm/[email protected]/node_modules/zigbee-herdsman/src/controller/controller.ts:143:29)
    at Zigbee.start (/app/lib/zigbee.ts:70:27)
    at Controller.start (/app/lib/controller.ts:101:13)
    at start (/app/index.js:149:5)
[19:24:29] INFO: Preparing to start...
[19:24:29] INFO: Socat not enabled
andreas@tor:~$ ping 192.168.7.110
PING 192.168.7.110 (192.168.7.110) 56(84) bytes of data.
64 bytes from 192.168.7.110: icmp_seq=1 ttl=64 time=1.60 ms
64 bytes from 192.168.7.110: icmp_seq=2 ttl=64 time=3.80 ms
^C
--- 192.168.7.110 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 1.596/2.697/3.799/1.101 ms
andreas@tor:~$ nmap  192.168.7.110
Starting Nmap 7.94SVN ( https://nmap.org ) at 2026-01-15 19:29 CET
Nmap scan report for tyr.pixi.nu (192.168.7.110)
Host is up (0.0032s latency).
Not shown: 998 closed tcp ports (conn-refused)
PORT   STATE SERVICE
80/tcp open  http
81/tcp open  hosts2-ns

Nmap done: 1 IP address (1 host up) scanned in 3.17 seconds
andreas@tor:~$

Have you tried newer firmware?

Running the latest non testing on my SLZB-06

Try a reflash.

Will give it a try

I have same issue, usually happens about every 6 weeks and pulling network cable (Poe power) fixes it.

I have the SLZB-06p7 running FW version 3.0.8 or 3.1.3.

I just live with it since it happens so infrequently to me.

It did happen once when I wasn’t home, I discovered using my smlight integration in HA, soft restarting fixed it when I wasn’t home (but forgot if I did core restart or zigbee restart from integration