esphome-docs/components/output/ble_client.rst

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BLE Client Binary Output
========================
.. seo::
:description: Writes a binary value to a BLE device.
:image: bluetooth.svg
The ``ble_client`` component is a output that can write a binary value to service characteristics of BLE devices.
For more information on BLE services and characteristics, see :doc:`/components/ble_client`.
.. warning::
The BLE software stack on the ESP32 consumes a significant amount of RAM on the device.
**Crashes are likely to occur** if you include too many additional components in your device's
configuration. Memory-intensive components such as :doc:`/components/voice_assistant` and other
audio components are most likely to cause issues.
.. code-block:: yaml
esp32_ble_tracker:
ble_client:
- mac_address: FF:FF:20:00:0F:15
id: itag_black
output:
- platform: ble_client
ble_client_id: itag_black
service_uuid: "10110000-5354-4F52-5A26-4249434B454C"
characteristic_uuid: "10110013-5354-4f52-5a26-4249434b454c"
require_response: false
Configuration variables:
------------------------
- **ble_client_id** (**Required**, :ref:`config-id`): ID of the associated BLE client.
- **service_uuid** (**Required**, UUID): UUID of the service on the device.
- **characteristic_uuid** (**Required**, UUID): UUID of the service's characteristic to write to.
- **id** (*Optional*, :ref:`config-id`): The ID to use for code generation, and for reference by dependent components.
- **require_response** (*Optional*, boolean): Control whether to require a remote response from the device when writing.
Whether or not this is required will vary by device. Defaults to ``false``
- All other options from :ref:`Output <config-output>`.
See Also
--------
- :doc:`/components/output/index`
- :doc:`/components/ble_client`
- :ghedit:`Edit`