The Home Assistant Connect ZBT-1 ships with a full-fledged Zigbee firmware. At this point, there are no known issues with the factory-flashed firmware.

Firmware updates for the Connect ZBT-1 are natively supported in Home Assistant 2025.4 and newer if you are running the ZHA integration or OTBR:

Reinstalling the firmware on Home Assistant Connect ZBT-1

Note: Home Assistant SkyConnect and Home Assistant Connect ZBT-1 use the same firmware. You can use the same firmware update process for both devices.

If you must reinstall the firmware on your Home Assistant Connect ZBT-1 today, the following options are available:

• For Thread: The OpenThread Border Router add-on flashes the Thread firmware on startup. You can verify the add-on logs to see the output of the firmware check or potential firmware update.

• For Zigbee: You can use the Silicon Labs Flasher add-on. The add-on will flash the Home Assistant Connect ZBT-1 and stop right after. Before starting the add-on:

  • Disable the Zigbee Home Automation integration or any add-on which might use the Home Assistant Connect ZBT-1 at the point of flashing.
  • Start the add-on.

Verify the add-on logs to confirm successful flashing.

Reflash using the Silicon Labs Web Flasher

Notice Firmware update through web flasher is only available for Home Assistant SkyConnect devices and Home Assistant Connect ZBT-1 devices purchased after October 20, 2024.

If your Home Assistant installation has no add-ons available, you can use the web flasher below to install the latest firmware version for Home Assistant Connect ZBT-1 directly from your browser over USB. Plug in your Connect ZBT-1 to your computer and select the firmware version you want to install.

To read more about the SL Web Tools, refer to this blog post.

Related topics

• Blog post on SL Web Tools