I like the Passive BLE Monitor custom component a lot…but Bluetooth coverage from my HA host was not good enough to pick up the BLE updates across my house from the Xiaomi LYWSD03MMC sensors…so I found another inexpensive solution that increased Bluetooth coverage considerably…and now I get reliable updates. Here’s my writeup on the solution: Using Switchbot Mini Plug with Tasmota32 and MQTT as BLE Gateway for Xiaomi LYWSD03MMC Temp Sensors