esp32_ble_tracker:
  id: ble_tracker_hub

sensor:
  # Explicit ble_hub_id: pins the neutral binding as a declared key.
  - platform: xiaomi_lywsd03mmc
    ble_hub_id: ble_tracker_hub
    mac_address: A4:C1:38:4E:16:78
    bindkey: e9efaa6873f9f9c87a5e75a5f814801c
    temperature:
      name: Xiaomi LYWSD03MMC Temperature
    humidity:
      name: Xiaomi LYWSD03MMC Humidity
    battery_level:
      name: Xiaomi LYWSD03MMC Battery Level