esp32_ble_tracker:
  id: ble_tracker_hub

exposure_notifications:
  on_exposure_notification:
    # Explicit ble_hub_id: pins the neutral binding as a declared key.
    ble_hub_id: ble_tracker_hub
    then:
      - lambda: |
          ESP_LOGD("main", "Got notification:");
          ESP_LOGD("main", "  RPI: %s", format_hex(x.rolling_proximity_identifier).c_str());
          ESP_LOGD("main", "  RSSI: %d", x.rssi);