firmware entity unknown for most ZHA devices, but not all

[poljane]

The problem

In most of my ZHA devices, the firmware entity appears unknown. Hence, the firmware updates are not appearing automatically in home assistant.

I saw that there has been an isssue around this last year #115116 , which was closed and apparently solved. However, it does not appear to be solved for me. Does someone have some suggestions?

firmware unkown is shown for:

• IKEA tradfri smartplug
• IKEA tradfri bulb gu10 ws 343lm
• Sonoff TRVZB

firmware entity appears correct (and firmware updates work) for:

• Sonoff snzb-02d

Thanks in advance!

What version of Home Assistant Core has the issue?

2025.12.5

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

No response

Link to integration documentation on our website

No response

Diagnostics information

No response

Example YAML snippet

Anything in the logs that might be useful for us?

Additional information

No response

[home-assistant]

Hey there @dmulcahey, @Adminiuga, @puddly, @TheJulianJES, mind taking a look at this issue as it has been labeled with an integration (zha) you are listed as a code owner for? Thanks!

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Please make sure your report includes the following things:

1. Please enable ZHA debug logging, let it run for 10-15 minutes, and make sure to capture whatever problem you're having in the debug log. 2. Download diagnostics JSON for the ZHA Integration for the specific devices you're having problems with. 3. Any issues whatsoever with Tuya devices or device support requests in general need to be made in the ZHA quirks repo https://github.com/zigpy/zha-device-handlers/issues, not Core's issue tracker. 5. Fill out the issue template and include whether or not you're using a VM/Proxmox with USB passthrough, what addons you have installed, and so on.
   ZHA does not have low-level control over your network, the mesh is self-organizing. If you started having network issues in a specific release, the release probably didn't cause the issue. Check your environment for new sources of 2.4GHz interference and make sure you're using an extension cable, not placing the coordinator near SSDs and USB 3.0 ports, etc. Just because things worked in the past with a bad setup doesn't mean they'll keep working in the future.
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zha documentation
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[puddly]

We show "unknown" when the latest firmware version is not known for the device. IKEA device OTA is not enabled by default so they will show up as "unknown".

[TheJulianJES]

That and it may also take a while until the update status is calculated after HA is restarted. You can manually check for updates (multiple times) and updates may show (for the Sonoff device).

We'll look into caching the latest update between restarts.

We're also working on adding more OTA images upstream.

[erkr]

To chime in I have over 60 devices of various brands (ikea, Tuya, INNR, aqara, zemismart, sonoff, Heiman, 3A smart home DE) and see unknow for all ZHA update sensors. That issue is persistent over restarts and not just a matter of waiting a few days.
My ZHA config for updates is the default:

zha:
  enable_quirks: true
  custom_quirks_path: /config/custom_quirks/
  device_config: 
    a4:c1:38:c8:ba:41:8d:f9-1:  # multi unit airco switch
      type: "switch"  

[poljane]

for some reason (maybe an update?) the firmware updates appear now, so the issue is solved. I still don't know because they did not appear for weeks before, as I was trying to update them.

[erkr]

@poljane
Good to hear it works for you. Please share your ZHA OTA config. I never ever had any updates for ZHA devices