ESP32 Bluetooth Low Energy Device

The ble_presence binary sensor platform lets you track the presence of a Bluetooth Low Energy device.

../../_images/esp32_ble-ui.png
# Example configuration entry
esp32_ble_tracker:

binary_sensor:
  # Presence based on MAC address
  - platform: ble_presence
    mac_address: AC:37:43:77:5F:4C
    name: "ESP32 BLE Tracker Google Home Mini"
  # Presence based on BLE Service UUID
  - platform: ble_presence
    service_uuid: '11aa'
    name: "ESP32 BLE Tracker Test Service 16 bit"

Note

Service UUID can be 16 bit long, as in the example, but it can also be 32 bit long like 1122aaff, or 128 bit long like 11223344-5566-7788-99aa-bbccddeeff00.

Configuration variables:

  • name (Required, string): The name of the binary sensor.

  • mac_address (Optional, MAC Address): The MAC address to track for this binary sensor. Either this or service_uuid has to be present.

  • service_uuid (Optional, string): 16 bit, 32 bit, or 128 bit BLE Service UUID which can be tracked if the device randomizes the MAC address. Either this or mac_address has to be present.

  • id (Optional, ID): Manually specify the ID used for code generation.

  • All other options from Binary Sensor.

Setting Up Devices

To set up binary sensors for specific BLE beacons you first have to know which MAC address to track. Most devices show this screen in some setting menu. If you don’t know the MAC address, however, you can use the esp32_ble_tracker hub without any binary sensors attached and read through the logs to see discovered Bluetooth Low Energy devices.

# Example configuration entry for finding MAC addresses
esp32_ble_tracker:

Using the configuration above, first you should see a Starting scan... debug message at boot-up. Then, when a BLE device is discovered, you should see messages like Found device AC:37:43:77:5F:4C together with some information about their address type and advertised name. If you don’t see these messages, your device is unfortunately currently not supported.

Please note that devices that show a RANDOM address type in the logs cannot be used for MAC address based tracking, since their MAC-address periodically changes. Instead you can create a BLE beacon, set a unique 16 bit, 32 bit or 128 bit Service UUID and track your device based on that. Make sure you don’t pick a GATT Service UUID, otherwise generic services might give you incorrect tracking results.

See Also