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92 lines
2.5 KiB
ReStructuredText
92 lines
2.5 KiB
ReStructuredText
Template Binary Sensor
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======================
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.. seo::
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:description: Instructions for setting up template binary sensors.
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:image: description.svg
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The ``template`` binary sensor platform allows you to define any :ref:`lambda template <config-lambda>`
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and construct a binary sensor out if it. The lambda will run continuously; it isn't possible to specify
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an interval at which the lambda runs.
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For example, below configuration would turn the state of an ultrasonic sensor into
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a binary 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: template
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name: "Garage Door Open"
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lambda: |-
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if (id(ultrasonic_sensor1).state > 30) {
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// Garage Door is open.
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return true;
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} else {
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// Garage Door is closed.
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return false;
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}
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Possible return values of the lambda:
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- ``return true;`` if the binary sensor should be ON.
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- ``return false;`` if the binary sensor should be OFF.
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- ``return {};`` if the state is not known (use last known state)
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Configuration variables:
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------------------------
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- **lambda** (*Optional*, :ref:`lambda <config-lambda>`):
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Lambda to be evaluated repeatedly to get the current state of the binary sensor.
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- All other options from :ref:`Binary Sensor <config-binary_sensor>`.
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.. _binary_sensor-template-publish_action:
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``binary_sensor.template.publish`` Action
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-----------------------------------------
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You can also publish a state to a template binary sensor from elsewhere in your YAML file
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with the ``binary_sensor.template.publish`` action.
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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: template
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name: "Garage Door Open"
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id: template_bin
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# in some trigger
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on_...:
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- binary_sensor.template.publish:
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id: template_bin
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state: ON
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# Templated
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- binary_sensor.template.publish:
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id: template_bin
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state: !lambda 'return id(some_sensor).state > 30;'
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Configuration options:
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- **id** (**Required**, :ref:`config-id`): The ID of the template binary sensor.
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- **state** (**Required**, boolean, :ref:`templatable <config-templatable>`):
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The state to publish.
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.. note::
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This action can also be written in lambdas:
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.. code-block:: cpp
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id(template_bin).publish_state(true);
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See Also
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--------
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- :doc:`/components/binary_sensor/index`
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- :doc:`/components/sensor/template`
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- :ref:`automation`
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- :apiref:`template/binary_sensor/template_binary_sensor.h`
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- :ghedit:`Edit`
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