This guide describes how I got the Xiaomi Mijia LYWSD03MMC Temperature and Humidity sensors working in September 2022. This is likely to change soon as Bluetooth functionality is being built into Home Assistant Core, but for now it’s probably fairly accurate. Note that I am not an expert in this area, I read a lot and spent a lot of time on this. I’m using the XDO BT-802 Bluetooth receiver. There’s an XDO BT-802 Bluetooth Linux tutorial on its use that I wrote here. It took quite a bit of time…