esphome-docs/components/cover/custom.rst
2019-05-15 10:54:51 +02:00

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Custom Cover
============
This integration can be used to create custom covers in ESPHome
using the C++ (Arduino) API.
Please first read :doc:`/components/sensor/custom` guide,
the same principles apply here.
The example below is an example of a custom cover - all covers must override
two methods:
- ``get_traits``: This should return a :apiclass:`CoverTraits <cover::CoverTraits>` object
representing the capabilities of the cover.
- ``control``: This receives a :apiclass:`CoverCall <cover::CoverCall>` object that contains
the command the user tried to set.
.. code-block:: cpp
#include "esphome.h"
class MyCustomCover : public Component, public Cover {
public:
void setup() override {
// This will be called by App.setup()
pinMode(5, INPUT);
}
CoverTraits get_traits() override {
auto traits = CoverTraits();
traits.set_is_assumed_state(false);
traits.set_supports_position(true);
traits.set_supports_tilt(false);
return traits;
}
void control(const CoverCall &call) override {
// This will be called every time the user requests a state change.
if (call.get_position().has_value()) {
float pos = *call.get_position();
// Write pos (range 0-1) to cover
// ...
// Publish new state
this->position = pos;
this->publish_state();
}
if (call.get_stop()) {
// User requested cover stop
}
}
};
(Store this file in your configuration directory, for example ``my_cover.h``)
And in YAML:
.. code-block:: yaml
# Example configuration entry
esphome:
includes:
- my_cover.h
cover:
- platform: custom
lambda: |-
auto my_custom_cover = new MyCustomCover();
App.register_component(my_custom_cover);
return {my_custom_cover};
covers:
- name: "My Custom Cover"
Configuration variables:
- **lambda** (**Required**, :ref:`lambda <config-lambda>`): The lambda to run for instantiating the
cover(s).
- **covers** (**Required**, list): A list of covers to initialize. The length here
must equal the number of items in the ``return`` statement of the ``lambda``.
- All options from :ref:`Cover <config-cover>`.
See :apiclass:`Cover <cover::Cover>`
See Also
--------
- :ghedit:`Edit`