Duty Cycle Sensor
=================

The duty cycle sensor allows you to measure for what percentage of time a signal
on a GPIO pin is HIGH or LOW.

For example, you can measure if a status LED of a pool controller is permanently active
(indicating that the pump is on) or blinking.

.. figure:: images/duty_cycle-ui.png
    :align: center
    :width: 80.0%

.. code:: yaml

    # Example configuration entry
    sensor:
      - platform: duty_cycle
        pin: D0
        name: Duty Cycle Sensor

Configuration variables:
------------------------

- **pin** (*Optional*, :ref:`Pin Schema <config-pin_schema>`): The pin to observe for the duty
  cycle.
- **update_interval** (*Optional*, :ref:`config-time`): The interval to check the sensor. Defaults to ``15s``.
  See :ref:`sensor-default_filter`.
- **id** (*Optional*, :ref:`config-id`): Set the ID of this sensor for use in lambdas.
- All other options from :ref:`Sensor <config-sensor>` and :ref:`MQTT Component <config-mqtt-component>`.

See Also
--------

- :ref:`sensor-filters`
- :doc:`API Reference </api/sensor/duty_cycle>`
- `Edit this page on GitHub <https://github.com/OttoWinter/esphomedocs/blob/current/esphomeyaml/components/sensor/duty_cycle.rst>`__

.. disqus::