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107 lines
2.7 KiB
ReStructuredText
107 lines
2.7 KiB
ReStructuredText
.. _gpio-binary-sensor:
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GPIO Binary Sensor
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==================
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.. seo::
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:description: Instructions for setting up GPIO binary sensors with ESPHome.
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:image: pin.svg
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The GPIO Binary Sensor platform allows you to use any input pin on your
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device as a binary sensor.
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.. figure:: images/gpio-ui.png
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:align: center
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:width: 80.0%
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.. code-block:: yaml
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# Example configuration entry
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binary_sensor:
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- platform: gpio
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pin: D2
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name: "Living Room Window"
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device_class: window
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Configuration variables:
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------------------------
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- **pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): The pin to periodically check.
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- **name** (**Required**, string): The name of the binary sensor.
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- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
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- All other options from :ref:`Binary Sensor <config-binary_sensor>`.
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Activating internal pullups
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---------------------------
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If you're hooking up a button without an external pullup or see lots of ON/OFF events
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in the log output all the time, this often means the GPIO pin is floating.
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For these cases you need to manually enable the pull-up (or pull-down) resistors on the ESP,
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you can do so with the :ref:`Pin Schema <config-pin_schema>`.
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.. code-block:: yaml
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binary_sensor:
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- platform: gpio
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pin:
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number: D2
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mode:
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input: true
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pullup: true
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name: ...
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Inverting Values
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----------------
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Use the ``inverted`` property of the :ref:`Pin Schema <config-pin_schema>` to invert the binary
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sensor:
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.. code-block:: yaml
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# Example configuration entry
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binary_sensor:
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- platform: gpio
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pin:
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number: D2
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inverted: true
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name: ...
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Debouncing Values
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-----------------
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Some binary sensors are a bit unstable and quickly transition between the ON and OFF state while
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they're pressed. To fix this and debounce the signal, use the :ref:`binary sensor filters <binary_sensor-filters>`:
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.. code-block:: yaml
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# Example configuration entry
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binary_sensor:
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- platform: gpio
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pin: D2
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name: ...
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filters:
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- delayed_on: 10ms
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Above example will only make the signal go high if the button has stayed high for more than 10ms.
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Alternatively, below configuration will make the binary sensor publish an ON value immediately, but
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will wait 10ms before publishing an OFF value:
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.. code-block:: yaml
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# Example configuration entry
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binary_sensor:
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- platform: gpio
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pin: D2
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name: ...
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filters:
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- delayed_off: 10ms
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See Also
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--------
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- :doc:`/components/binary_sensor/index`
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- :ref:`config-pin_schema`
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- :apiref:`gpio/binary_sensor/gpio_binary_sensor.h`
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- :ghedit:`Edit`
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