esp32_ble_tracker:
  id: ble_tracker_hub

sensor:
  # Explicit ble_hub_id: pins the neutral binding as a declared key.
  - platform: xiaomi_lywsd02mmc
    ble_hub_id: ble_tracker_hub
    mac_address: A4:C1:38:54:5E:18
    bindkey: 2529d8e0d23150a588675cc54ad48400
    temperature:
      name: Xiaomi LYWSD02MMC Temperature
    humidity:
      name: Xiaomi LYWSD02MMC Humidity
    battery_level:
      name: Xiaomi LYWSD02MMC Battery Level