General In this tutorial we will use ESP32 board as a gateway between Bluetooth sensors ( Xiaomi LYWSD03MMC LCD configured here, but should work with anything else, too ) and Home Assistant’s MQTT server ( You can use any other platform instead of Home Assistant, of course). You can check some of the supported BLE sensors here. Prerequisites: ESP32 development board ( you can buy any on aliexpress.com ). This is needed in order to directly access BLE sensors. Home …