mirror of
https://github.com/esphome/esphome-docs.git
synced 2024-12-26 17:27:47 +01:00
147 lines
5.3 KiB
ReStructuredText
147 lines
5.3 KiB
ReStructuredText
Addressable Light
|
|
=================
|
|
|
|
.. seo::
|
|
:description: Instructions for setting up displays using addressable lights and LED matrix
|
|
:image: addressable_light.jpg
|
|
|
|
The ``addressable_light`` display platform allows to display text and graphics on an addressable
|
|
light that has been arranged in a display matrix.
|
|
|
|
The display requires that an :apiclass:`AddressableLight <light::AddressableLight>` component, such as
|
|
:doc:`/components/light/fastled` or :doc:`/components/light/neopixelbus`, be defined.
|
|
|
|
.. figure:: images/addressable_light.jpg
|
|
:align: center
|
|
:width: 75.0%
|
|
|
|
WS2812B Addressable Light Display
|
|
|
|
.. code-block:: yaml
|
|
|
|
light:
|
|
- platform: fastled_clockless
|
|
chipset: WS2812B
|
|
pin: GPIO4
|
|
num_leds: 64
|
|
rgb_order: GRB
|
|
name: "led_matrix"
|
|
id: led_matrix_light
|
|
default_transition_length: 0s
|
|
color_correct: [50%, 50%, 50%]
|
|
restore_mode: ALWAYS_ON
|
|
|
|
display:
|
|
- platform: addressable_light
|
|
id: led_matrix_display
|
|
addressable_light_id: led_matrix_light
|
|
width: 8
|
|
height: 8
|
|
rotation: 180°
|
|
update_interval: 16ms
|
|
lambda: |-
|
|
// Draw a bulls-eye pattern
|
|
Color red = Color(0xFF0000);
|
|
Color green = Color(0x00FF00);
|
|
Color blue = Color(0x0000FF);
|
|
it.rectangle(0, 0, 8, 8, red);
|
|
it.rectangle(1, 1, 6, 6, green);
|
|
it.rectangle(2, 2, 4, 4, blue);
|
|
it.rectangle(3, 3, 2, 2, red);
|
|
|
|
Configuration variables:
|
|
------------------------
|
|
|
|
- **addressable_light_id** (**Required**, :ref:`config-id`): The id of the addressable light component to use
|
|
as a display.
|
|
- **width** (**Required**, int): The width of the LED matrix in pixels.
|
|
- **height** (**Required**, int): The height of the LED matrix in pixels.
|
|
- **rotation** (*Optional*): Set the rotation of the display. Everything you draw in ``lambda:`` will be rotated
|
|
by this option. One of ``0°`` (default), ``90°``, ``180°``, ``270°``.
|
|
- **update_interval** (*Optional*, :ref:`config-time`): The interval to call the lambda to update the display.
|
|
Defaults to ``16ms``.
|
|
- **pixel_mapper** (*Optional*, :ref:`lambda <config-lambda>`): A lambda that returns the integer address of the LED
|
|
given the supplied the ``x`` and ``y`` pixel coordinate. By default, a left-to-right direct pixel mapper is used.
|
|
- **lambda** (*Optional*, :ref:`lambda <config-lambda>`): The lambda to use for rendering the content on the display.
|
|
``it`` will be an instance of :apiclass:`DisplayBuffer <display::DisplayBuffer>`.
|
|
See :ref:`display-engine` for more information.
|
|
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
|
|
|
|
|
|
.. note::
|
|
|
|
When enabled (the default, but also via ``it.set_enabled(true)``), any effect currently running on the
|
|
addressable light will be disabled. When disabled (``it.set_enabled(false)``), the last configured effect will
|
|
be restored.
|
|
|
|
While the display is enabled, it is still possible to control the parent addressable light component in some
|
|
limited capacity. Changing the brightness will still work, but changing the color will have no affect. It is not
|
|
adivsable to enable any effects (ex: rainbow, color wipe, etc) while the display is enabled, as this will cause a
|
|
great deal of flickering while the effect competes with the display for rendering.
|
|
|
|
|
|
pixel_mapper
|
|
------------
|
|
|
|
An addressable LED matrix is just an addressable LED strip laid out in a matrix -- the path often snaking
|
|
down-up-down, left-right-left, or whichever way the manufacturer has chosen. Like an addressable LED strip,
|
|
each pixel on a matrix is addressed as an offset from the first pixel (0). The job of the pixel mapper is
|
|
to translate a logical x-y pixel coordinate to the address of the expected physical LED.
|
|
|
|
Determining the correct algorithm for the pixel mapper for your matrix will hopefully only require some graph paper and a little bit of math.
|
|
|
|
|
|
Default
|
|
*******
|
|
|
|
The default pixel mapper assumes that the led matrix is addressed starting with the top left LED, moving to the right, and
|
|
then starting with the left-most row of the next row.
|
|
|
|
.. figure:: images/addressable_light_pixel_map_default.png
|
|
:align: center
|
|
:width: 75.0%
|
|
|
|
Default pixel_mapper as used with a 4x4 led matrix
|
|
|
|
|
|
BTF-Lighting 8x32 WS2812B Flexible LED Matrix
|
|
*********************************************
|
|
|
|
The following image illustrates the path the addressable strip takes through the common the BTF-Lighting 8x32 matrix.
|
|
|
|
.. figure:: images/addressable_light_pixel_map_8x32.png
|
|
:align: center
|
|
:width: 75.0%
|
|
|
|
LED layout for BTF-Lighting 8x32 WS2812B Flexible LED Matrix
|
|
|
|
|
|
Below is a definition that includes a pixel_mapper suitable for these 8x32 matrices.
|
|
|
|
.. code-block:: yaml
|
|
|
|
display:
|
|
- platform: addressable_light
|
|
id: led_matrix_32x8_display
|
|
addressable_light_id: led_matrix_32x8
|
|
width: 32
|
|
height: 8
|
|
pixel_mapper: |-
|
|
if (x % 2 == 0) {
|
|
return (x * 8) + y;
|
|
}
|
|
return (x * 8) + (7 - y);
|
|
rotation: 0°
|
|
update_interval: 16ms
|
|
|
|
|
|
See Also
|
|
--------
|
|
|
|
- :apiref:`addressable_light/addressable_light_display.h`
|
|
- :doc:`/components/light/index`
|
|
- :doc:`/components/light/fastled`
|
|
- :doc:`/components/light/neopixelbus`
|
|
- :doc:`/components/light/partition`
|
|
- :ghedit:`Edit`
|