I like!

Note, here is the link to an article with the details on what to do.

https://smarthomescene.com/guides/convert-xiaomi-lywsd03mmc-from-bluetooth-to-zigbee/

got one bricked from this process already. ordered 5 more to play with. alas, I have zero experience in microelectronics, so I cannot reanimate the failed devices using UART.

FYI you don’t need to use the converter if your zigbee2mqtt >= 1.33.2

The more I learn about these devices, the less sure I am it was a good idea to bring them inside my house.

The fundamental lack of security, or outright hostile features being present is offputing.