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87 lines
2.5 KiB
ReStructuredText
87 lines
2.5 KiB
ReStructuredText
Template Text Sensor
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====================
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.. seo::
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:description: Instructions for setting up template text sensors in ESPHome
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:image: description.svg
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The ``template`` text sensor platform allows you to create a text sensor with templated values
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using :ref:`lambdas <config-lambda>`.
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.. code-block:: yaml
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# Example configuration entry
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text_sensor:
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- platform: template
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name: "Template Text Sensor"
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lambda: |-
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return {"Hello World"};
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update_interval: 60s
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Possible return values for the lambda:
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- ``return {"STRING LITERAL"};`` the new value for the sensor of type ``std::string``. **Has to be** in
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brackets ``{}``!
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- ``return {};`` if you don't want to publish a new state (advanced).
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Configuration variables:
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------------------------
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- **name** (**Required**, string): The name of the text sensor.
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- **lambda** (*Optional*, :ref:`lambda <config-lambda>`):
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Lambda to be evaluated every update interval to get the new value of the text sensor
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- **update_interval** (*Optional*, :ref:`config-time`): The interval to publish the value of the
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text sensor, either the result of the lambda function or if no lambda function the last value
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published using the publish action. Defaults to ``60s``.
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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:`Text Sensor <config-text_sensor>`.
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.. _text_sensor-template-publish_action:
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``text_sensor.template.publish`` Action
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---------------------------------------
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You can also publish a state to a template text sensor from elsewhere in your YAML file
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with the ``text_sensor.template.publish`` action.
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.. code-block:: yaml
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# Example configuration entry
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text_sensor:
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- platform: template
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name: "Template Text Sensor"
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id: template_text
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# in some trigger
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on_...:
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- text_sensor.template.publish:
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id: template_text
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state: "Hello World"
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# Templated
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- text_sensor.template.publish:
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id: template_text
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state: !lambda 'return "Hello World";'
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Configuration options:
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- **id** (**Required**, :ref:`config-id`): The ID of the template text sensor.
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- **state** (**Required**, string, :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_text).publish_state("Hello World");
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See Also
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--------
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- :ref:`automation`
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- :apiref:`template/text_sensor/template_text_sensor.h`
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- :ghedit:`Edit`
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