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92 lines
2.4 KiB
ReStructuredText
92 lines
2.4 KiB
ReStructuredText
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Text Sensor Component
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=====================
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Text sensors are a lot like normal :doc:`sensors </esphomeyaml/components/sensor/index>`.
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But where the "normal" sensors only represent sensors that output **numbers**, this
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component can represent any *text*.
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.. _config-text_sensor:
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Base Text Sensor Configuration
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------------------------------
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.. code:: yaml
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# Example sensor configuration
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name: Livingroom Temperature
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# Optional variables:
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icon: "mdi:water-percent"
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Configuration variables:
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- **name** (**Required**, string): The name for the sensor.
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- **icon** (*Optional*, icon): Manually set the icon to use for the sensor in the frontend.
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Automations:
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- **on_value** (*Optional*, :ref:`Automation <automation>`): An automation to perform
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when a new value is published. See :ref:`text_sensor-on_value`.
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Text Sensor Automation
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----------------------
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You can access the most recent state of the sensor in :ref:`lambdas <config-lambda>` using
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``id(sensor_id).value``.
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.. _text_sensor-on_value:
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``on_value``
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************
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This automation will be triggered when a new value is published.
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In :ref:`Lambdas <config-lambda>` you can get the value from the trigger with ``x``.
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.. code:: yaml
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text_sensor:
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- platform: version
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# ...
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on_value:
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then:
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- lambda: |-
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ESP_LOGD("main", "The current version is %s", x.c_str());
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Configuration variables: See :ref:`Automation <automation>`.
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lambda calls
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************
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From :ref:`lambdas <config-lambda>`, you can call several methods on all text sensors to do some
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advanced stuff (see the full :doc:`API Reference </api/sensor/index>` for more info).
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- ``push_new_value()``: Manually cause the sensor to push out a value.
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.. code:: yaml
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// Within lambda, push a value of "Hello World"
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id(my_sensor).push_new_value("Hello World");
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- ``value``: Retrieve the current value of the sensor as an ``std::string`` object.
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.. code:: yaml
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// For example, create a custom log message when a value is received:
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std::string val = id(my_sensor).value;
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ESP_LOGI("main", "Value of my sensor: %s", val.c_str());
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See Also
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--------
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- :doc:`API Reference </api/text_sensor/index>`
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- `Edit this page on GitHub <https://github.com/OttoWinter/esphomedocs/blob/current/esphomeyaml/components/text_sensor/index.rst>`__
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.. toctree::
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:maxdepth: 1
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version
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mqtt_subscribe
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template
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.. disqus::
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