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65 lines
2.2 KiB
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65 lines
2.2 KiB
ReStructuredText
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ST7920 LCD Graphic Display
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==========================
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.. seo::
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:description: Instructions for setting up ST7920 LCD display drivers.
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:image: st7920.jpg
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.. _st7920:
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Usage
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-----
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The ``st7920`` display platform allows you to use
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ST7920 (`datasheet <http://www.elecrow.com/download/SPE_IM120424014_EONE_12864_Graphic_LCD.pdf>`__,
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`electrodragon <https://www.elecrow.com/128x64-graphic-lcd-p-1143.html>`__)
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displays with ESPHome. Note that this component is for displays that are connected via the 3-Wire :ref:`SPI bus <spi>`.
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It's a monochrome LCD graphic display.
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.. figure:: images/st7920-full.jpg
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:align: center
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:width: 75.0%
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ST7920 LCD Graphic Display
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Connect D5 to the E pin you chose for the :ref:`SPI bus <spi>`, connect D7 to the R/W pin and ``RS`` to some GPIO pins on the ESP.
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For SPI communication it's important to connect PSB on the LCD to GND.
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.. code-block:: yaml
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# Example configuration entry
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spi:
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clk_pin: D5
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mosi_pin: D7
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display:
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- platform: st7920
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cs_pin:
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number: 4
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inverted: true
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lambda: |-
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it.print(0, 0, id(font), "Hello World!");
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Configuration variables:
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************************
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- **cs_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): Sometimes also called ``RS``. For ST7920 should be inverted.
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- **width** (**Required**, int): The "width" of a screen. Defaults to 128.
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- **height** (**Required**, int): The "height" of a screen. Defaults to 64;
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- **rotation** (*Optional*): Set the rotation of the display. Everything you draw in ``lambda:`` will be rotated
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by this option. One of ``0°`` (default), ``90°``, ``180°``, ``270°``.
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- **lambda** (*Optional*, :ref:`lambda <config-lambda>`): The lambda to use for rendering the content on the display.
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See :ref:`display-engine` for more information.
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- **update_interval** (*Optional*, :ref:`config-time`): The interval to re-draw the screen. Defaults to ``60s``.
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- **pages** (*Optional*, list): Show pages instead of a single lambda. See :ref:`display-pages`.
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- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
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See Also
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--------
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- :doc:`index`
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- :apiref:`st7920/st7920.h`
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- :ghedit:`Edit`
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