Can't update my SLZB-06 coordinator | Home Assistant | Page 1

visual belfry Sep 11, 2025, 4:55 PM

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I've tried updating my SLZB-06 a few times. The OTA checker finds the v2.9.8 to update, but on trying it returns a write err.

Then I tried via browser. But it fails to initialise. I know there are other options to short the pins, but I'd prefer not to open the device.

Also I'm not sure what's the right file to download manually from https://smlight.tech/flasher/#SLZB-06. The only 2.9.8 is the slzb-os-v2.9.8-full.bin, but the last for SLZB-06 is the slzb-06-v2.7.1-full.bin.

How can I update safely?

SMLIGHT firmware online updater

Flash your SMLIGHT device right from the web-page

Open this link -> Connect your SMLIGHT device to this PC -> Press Flash. You have properly updated device! That is it!

true cosmos Sep 11, 2025, 5:02 PM

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As far as I know the OTA variant should be fine to do upgrades with. I had the same issue and used the full and it worked so 🤷

visual belfry Sep 11, 2025, 5:11 PM

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true cosmos As far as I know the OTA variant should be fine to do upgrades with. I had the s...

yeah but via which method? And also, which version? I'm confused with the os thing in the filenames. Mine is 06, so I don't think the os are for me?

plush monolith Sep 11, 2025, 5:22 PM

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try updating with the ha integration.

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running 2.9.8 here

visual belfry Sep 11, 2025, 5:24 PM

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plush monolith try updating with the ha integration.

hmm how? I don't have the SLZB-06 integrated in HA. It's not the bridge here, is it? It shows diff versions

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wait I got it

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I had it ignored

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Logger: homeassistant
Source: components/smlight/update.py:213
First occurred: 18:26:31 (1 occurrence)
Last logged: 18:26:31

Error doing job: Task exception was never retrieved (None)
Traceback (most recent call last):
  File "/usr/local/lib/python3.13/site-packages/pysmlight/sse.py", line 56, in client
    await self.sse_stream()
  File "/usr/local/lib/python3.13/site-packages/pysmlight/sse.py", line 70, in sse_stream
    await self._message_handler(event)
  File "/usr/local/lib/python3.13/site-packages/pysmlight/sse.py", line 79, in _message_handler
    self.callbacks.get(event_type, lambda x: None)(event)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/smlight/update.py", line 213, in _update_failed
    raise HomeAssistantError(
    ...<5 lines>...
    )
homeassistant.exceptions.HomeAssistantError: Firmware update failed for Core firmware

plush monolith Sep 11, 2025, 5:27 PM

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visual belfry Sep 11, 2025, 5:28 PM

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yeah yeah I've got it, I tried, but that error shows up

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plush monolith Sep 11, 2025, 5:28 PM

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have you done a full reboot (not just restart) your ha and zlsb

visual belfry Sep 11, 2025, 5:29 PM

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not a host reboot, no

plush monolith Sep 11, 2025, 5:29 PM

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do fir\st

visual belfry Sep 11, 2025, 5:34 PM

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plush monolith do fir\st

same error after reboot

plush monolith Sep 11, 2025, 5:36 PM

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Can you ping slzb-06.local ?

visual belfry Sep 11, 2025, 5:36 PM

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I can access it via browser no prob

true cosmos Sep 11, 2025, 5:37 PM

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visual belfry yeah but via which method? And also, which version? I'm confused with the `os` t...

I uploaded it via its webinterface.

visual belfry Sep 11, 2025, 5:37 PM

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true cosmos I uploaded it via its webinterface.

here?

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can you then help me choose the right file? https://smlight.tech/flasher/#SLZB-06

slzb-os-v2.9.8-full.bin (only 2.9.8 which is the suggested)
slzb-06-v2.7.1-full.bin (last for 06)
slzb-os-u-v3.0.0-full.bin (actual latest)
?

true cosmos Sep 11, 2025, 5:42 PM

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This should be fine: https://updates.smlight.tech/firmware/slzb06x/core/slzb-os-v2.9.8-ota.bin

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It's what the GUI would use: https://updates.smlight.tech/services/api/slzb-06x-ota.php?type=ESP

visual belfry Sep 11, 2025, 5:43 PM

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perfect, that confirms the os versions are compatible, thanks

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not sure why it's not using the available 3.0.0 but I won't risk it

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you meant the option I showed, right?

true cosmos Sep 11, 2025, 5:44 PM

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I assume the u stands for unreleased or unstable 🤷

visual belfry Sep 11, 2025, 5:44 PM

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oh I had missed that

true cosmos Sep 11, 2025, 5:44 PM

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visual belfry Sep 11, 2025, 5:46 PM

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hmmm it uploaded... and then the page refreshed, and nothing happpened

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trying again

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weird

plush monolith Sep 11, 2025, 5:47 PM

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can you disable dhcp on 06 and set static ip and gateway. then try again

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if not working, connect usb

visual belfry Sep 11, 2025, 5:48 PM

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https://xfiles.s-ul.eu/OUOtGqJ0

▶ Play video

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it seems to flash, but on reboot there's still the old version

true cosmos Sep 11, 2025, 5:50 PM

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I guess you could try to make a smaller version jump.

visual belfry Sep 11, 2025, 5:52 PM

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trying 2.7.1 now

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same thing

plush monolith Sep 11, 2025, 5:53 PM

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deep void google says dhcp is possible cause

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set static ip

visual belfry Sep 11, 2025, 5:53 PM

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plush monolith can you disable dhcp on 06 and set static ip and gateway. then try again

I have a static IP for it via router

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always had

plush monolith Sep 11, 2025, 5:54 PM

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but not in 06 though

visual belfry Sep 11, 2025, 5:54 PM

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wdym?

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here too?

plush monolith Sep 11, 2025, 5:54 PM

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yeah i know, but 06 is set to dhcp

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give it same ip as stated in router

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make sure to fill both dns servers to your routers ip, as router will reflect .local as mdns

visual belfry Sep 11, 2025, 5:56 PM

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plush monolith Sep 11, 2025, 5:56 PM

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set first dns to router ip

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192.168.1.xxx

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reboot and try

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time is set in 06?

visual belfry Sep 11, 2025, 5:57 PM

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yeah, it shows correct.

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std ota same error

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trying custom file now

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nope. Same thing. 🙁

plush monolith Sep 11, 2025, 5:58 PM

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strange.

visual belfry Sep 11, 2025, 5:58 PM

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[17:58:19] setup | Starting firmware: v2.3.6
[17:58:21] ConfigHelper | LittleFS mounted
[17:58:21] ConfigHelper | load config
[17:58:21] ConfigHelper | config open: Ok
[17:58:21] setup | Config loaded
[17:58:21] setup | Reboot reason: 3
[17:58:21] setup | Coordinator mode: USB
[17:58:21] setup | Radio FW version: 20240710
[17:58:21] setup | Device type: SLZB-06
[17:58:21] setup | Radio mode: ZB COORD
[17:58:21] Network | init
[17:58:21] Network | Try ETH
[17:58:21] L_Y,L_B | status: 1
[17:58:21] setup | [WARNING] Low filesystem size detected, Zigbee OTA updates will not work! FS size: 320
[17:58:21] setup | Filesystem used: 200
[17:58:21] setup | done
[17:58:22] Network | EVENT_ETH_START
[17:58:22] Network | EVENT_ETH_CONNECTED
[17:58:22] Network | ETH init: OK
[17:58:22] Network | ETH static IP config: OK
[17:58:22] Network | Use ETH
[17:58:22] Network | [MDNS] Started
[17:58:22] Network | EVENT_ETH_GOT_IP
[17:58:22] Network | ETH MAC: C0:49:EF:D3:14:5F IPv4: 192.168.1.106 GW: 192.168.1.1 Speed: 100Mbps DNS1: 192.168.1.1 DNS2: 8.8.8.8
[17:58:22] Network | fireNetworkUp
[17:58:22] Web | Webserver started
[17:58:22] time | time sync start
[18:58:22] time | timezone: GMT0BST,M3.5.0/1,M10.5.0
[18:58:22] time | Thursday, September 11 2025 18:58:22
[18:58:22] taskTimeSync | Heap: 1388
[18:58:22] time | stop task
[18:58:29] internet | connected
[18:58:30] Network | [POST] result: 200
[18:58:30] Network | [POST] response: Previous records removed successfully.New record [on] created successfullyNew record [lo] created successfully
[18:58:30] stats | Statistics sent
[18:58:30] stats | Heap: 2384
[18:58:30] [ZBCHK] | Wrong answer
[18:58:30] [ZBVER] | Unknown
[18:58:31] [ZBCHK] | done
[18:58:34] ConfigHelper | write config
[18:58:34] ConfigHelper | config saved
[18:59:08] Web | https://updates.smlight.tech/firmware/slzb06x/core/slzb-os-v2.9.8-ota.bin
[18:59:09] ESP_OTA | totalLen2617

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Just noticed somehting in the log:

[17:58:21] setup | [WARNING] Low filesystem size detected, Zigbee OTA updates will not work! FS size: 320

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that's about the Zigbee OTA though, not the Core...

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so it might not be related

plush monolith Sep 11, 2025, 6:03 PM

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maybe try a factory reset of device? could be a bootloader that is to old and need serial flash. also check device is sufficient powered. do next update over usb instead of wifi.

visual belfry Sep 11, 2025, 6:03 PM

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plush monolith maybe try a factory reset of device? could be a bootloader that is to old and ne...

does that wipe my zigbee network in Z2M? :S Or is that stored in the addon?

plush monolith Sep 11, 2025, 6:04 PM

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i am afraid it does yes.

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try all mentioned stuff above and do factory reset if nothing else works. also reboot router 😉 for today i am off, good luck

#Can't update my SLZB-06 coordinator