85 lines
2.6 KiB
ReStructuredText
85 lines
2.6 KiB
ReStructuredText
Custom Text Sensor
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==================
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.. seo::
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:description: Instructions for setting up Custom C++ text sensors with ESPHome.
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:image: language-cpp.svg
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:keywords: C++, Custom
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.. warning::
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Custom components are deprecated, not recommended for new configurations and will be removed from ESPHome in a
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future release. Please look at creating a real ESPHome component and "importing" it into your configuration with
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:doc:`/components/external_components`.
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You can find some basic documentation on creating your own components at :ref:`contributing_to_esphome`.
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.. warning::
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While we try to keep the ESPHome YAML configuration options as stable as possible, the ESPHome API is less
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stable. If something in the APIs needs to be changed in order for something else to work, we will do so.
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This component can be used to create custom text sensors in ESPHome using the C++ (Arduino) API.
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Please first read :doc:`/components/sensor/custom` guide, the same principles apply here and text
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sensors are very similar to sensors internally.
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The example below is an example of a custom text sensor which constantly publishes
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the message "Hello World!".
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.. code-block:: cpp
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#include "esphome.h"
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class MyCustomTextSensor : public PollingComponent, public TextSensor {
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public:
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// constructor
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MyCustomTextSensor() : PollingComponent(15000) {}
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void setup() override {
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// This will be called by App.setup()
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}
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void update() override {
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// This will be called every "update_interval" milliseconds.
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// Publish state
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publish_state("Hello World!");
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}
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};
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(Store this file in your configuration directory, for example ``my_text_sensor.h``)
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And in YAML:
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.. code-block:: yaml
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# Example configuration entry
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esphome:
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includes:
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- my_text_sensor.h
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text_sensor:
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- platform: custom
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lambda: |-
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auto my_custom_sensor = new MyCustomTextSensor();
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App.register_component(my_custom_sensor);
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return {my_custom_sensor};
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text_sensors:
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name: "My Custom Text Sensor"
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Configuration variables:
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- **lambda** (**Required**, :ref:`lambda <config-lambda>`): The lambda to run for instantiating the
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text sensor(s).
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- **text_sensors** (**Required**, list): A list of text sensors to initialize. The length here
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must equal the number of items in the ``return`` statement of the ``lambda``.
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- All options from :ref:`Text Sensor <config-text_sensor>`.
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See Also
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--------
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- :doc:`/components/text_sensor/index`
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- :apiclass:`API Reference <text_sensor::TextSensor>`
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- :ghedit:`Edit`
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