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95 lines
2.9 KiB
ReStructuredText
95 lines
2.9 KiB
ReStructuredText
Custom Light Output
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===================
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.. seo::
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:description: Instructions for setting up Custom C++ lights 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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:ref:`Custom Components are deprecated<a_note_about_custom_components>`, not recommended for new configurations and
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will be removed from ESPHome in a future release. Please look at creating a real ESPHome component and "importing"
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it into your configuration with :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 lights in ESPHome using the C++ (Arduino) API.
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Please first read :doc:`/components/sensor/custom` guide, the same principles apply here.
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All internal stuff (like effects, transitions etc) is handled by the light core
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and cannot be overridden. Light outputs are only responsible for displaying some state
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when asked to do so.
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The example below is an example of a custom light output.
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.. code-block:: cpp
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#include "esphome.h"
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class MyCustomLightOutput : public Component, public LightOutput {
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public:
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void setup() override {
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// This will be called by App.setup()
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pinMode(5, INPUT);
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}
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LightTraits get_traits() override {
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// return the traits this light supports
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auto traits = LightTraits();
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traits.set_supported_color_modes({ColorMode::RGB, ColorMode::BRIGHTNESS});
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return traits;
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}
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void write_state(LightState *state) override {
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// This will be called by the light to get a new state to be written.
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float red, green, blue;
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// use any of the provided current_values methods
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state->current_values_as_rgb(&red, &green, &blue);
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// Write red, green and blue to HW
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// ...
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}
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};
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(Store this file in your configuration directory, for example ``my_light.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_light.h
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light:
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- platform: custom
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lambda: |-
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auto light_out = new MyCustomLightOutput();
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App.register_component(light_out);
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return {light_out};
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lights:
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- name: "My Custom Light"
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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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light output(s).
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- **lights** (**Required**, list): A list of lights 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:`Light <config-light>`.
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See :apiclass:`Light <light::LightOutput>`
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See Also
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--------
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- :ghedit:`Edit`
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