Read the Home Assistant Connect ZBT-1 issue and replacement announcement for details.
This uses the same Javascript component as https://connectzbt1.home-assistant.io/firmware-update/.
The official web firmware update tool was disabled between September-December 2024 in home-assistant/connectzbt1.home-assistant.io@a110225 due to the voltage regulator problem (see issue #137 for details).
This site is offered as an unofficial alternative hosting, in the event that the official update tool is unavailable again in the future.
I am not affiliated with Home Assistant / Nabu Casa or Silicon Labs.
Use this tool at your own risk.