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208 lines
7.3 KiB
ReStructuredText
SSD1327 OLED Display
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====================
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.. seo::
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:description: Instructions for setting up SSD1327 OLED display drivers.
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:image: ssd1327.jpg
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.. _ssd1327-i2c:
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Over I²C
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--------
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The ``ssd1327_i2c`` display platform allows you to use
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SSD1327 (`datasheet <https://www.generationrobots.com/media/Ecran_OLED_0_96/SSD1327_datasheet.pdf>`__,
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`Waveshare <https://www.waveshare.com/1.5inch-oled-module.htm>`__) displays with ESPHome. Note that this component is for
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displays that are connected via the :ref:`I²C Bus <i2c>`. If your SSD1327 is connected via the 4-Wire
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:ref:`SPI bus <spi>`, see :ref:`ssd1327-spi`.
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.. figure:: images/ssd1327-full.jpg
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:align: center
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:width: 75.0%
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SSD1327 OLED Display
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Connect CLK to the SCL (clock) pin you chose for the :ref:`I²C Bus <i2c>` and connect DIN to the SDA (data) pin.
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For power, connect VCC to 3.3V and GND to GND. You may also connect the ``RESET`` pin to an available pin on the
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ESP; this is recommended as it improves reliability.
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.. code-block:: yaml
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# Example configuration entry
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i2c:
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sda: D1
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scl: D2
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display:
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- platform: ssd1327_i2c
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model: "SSD1327 128x128"
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reset_pin: D0
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address: 0x3D
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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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- **model** (**Required**): The model of the display. At present, only one option is available:
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- ``SSD1327 128x128``
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- **reset_pin** (*Optional*, :ref:`Pin Schema <config-pin_schema>`): The RESET pin. Defaults to not connected.
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- **address** (*Optional*, int): Manually specify the :ref:`I²C <i2c>` address of the display. Defaults to 0x3D.
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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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- **brightness** (*Optional*): Set the screen brightness in percents 0.0-1.0. Defaults to `1.0` that corresponds to 100%.
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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 ``5s``.
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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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- **brightness** (*Optional*, float): Manually override display brightness in %. Defaults to ``100%``
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.. note::
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To speed up the display update process you can select higher I²C frequencies.
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.. _ssd1327-spi:
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Over SPI
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--------
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The ``ssd1327_spi`` display platform allows you to use
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SSD1327 (`datasheet <https://cdn-shop.adafruit.com/datasheets/SSD1327.pdf>`__, `Adafruit <https://www.adafruit.com/product/326>`__)
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displays with ESPHome. Note that this component is for displays that are connected via the 4-Wire :ref:`SPI bus <spi>`.
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If your SSD1327 is connected via the :ref:`I²C Bus <i2c>`, see :ref:`ssd1327-i2c`.
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.. figure:: images/ssd1327-full.jpg
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:align: center
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:width: 75.0%
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SSD1327 OLED Display
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Connect CLK to the SCK (clock) pin you chose for the :ref:`SPI bus <spi>`, connect DIN to the MOSI/SDO pin, and connect ``DC``
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to another pin of your choosing. ``CS`` may connect to a pin on the ESP or it may connect to ground if the display is the only
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device connected to the SPI bus. For power, connect VCC to 3.3V and GND to GND. You may also connect the ``RESET`` pin to an
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available pin on the ESP; this is recommended as it improves reliability.
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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: D0
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mosi_pin: D1
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display:
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- platform: ssd1327_spi
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model: "SSD1327 128x128"
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cs_pin: D2
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dc_pin: D3
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reset_pin: D4
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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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- **model** (**Required**): The model of the display. At present, only one option is available:
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- ``SSD1327 128x128``
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- **cs_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): The Chip Select (CS) pin.
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- **dc_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): The DC pin.
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- **reset_pin** (*Optional*, :ref:`Pin Schema <config-pin_schema>`): The RESET pin. Defaults to not connected.
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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 ``5s``.
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- **pages** (*Optional*, list): Show pages instead of a single lambda. See :ref:`display-pages`.
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- **spi_id** (*Optional*, :ref:`config-id`): Manually specify the ID of the :ref:`SPI Component <spi>` if you want
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to use multiple SPI buses.
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- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
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- **brightness** (*Optional*, float): Manually override display brightness in %. Defaults to ``100%``
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Configuration examples
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**********************
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To utilize the grayscale capabilities of this display module, add a ``color:`` section to your YAML configuration;
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please see :ref:`color <config-color>` for more details. As this is a grayscale display, it only uses the white color
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element as shown below.
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To use grayscale in your lambda:
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.. code-block:: yaml
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color:
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- id: medium_gray
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white: 50%
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...
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display:
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...
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lambda: |-
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it.rectangle(0, 0, it.get_width(), it.get_height(), id(medium_gray));
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To bring in grayscale images:
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.. code-block:: yaml
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image:
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- file: "image.jpg"
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id: my_image
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resize: 120x120
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type: GRAYSCALE
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...
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display:
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...
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lambda: |-
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it.image(0, 0, id(my_image));
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In this case, the image will be converted to grayscale (regardless of its original format) and rendered as such
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when drawn on the display. Note that the original image may require some adjustment as not all images immediately
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convert nicely to the 4-bit grayscale format this display supports.
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Note that if ``type: GRAYSCALE`` is omitted, the image will render as a binary image (no grayscale); in this
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case, a color attribute may be passed to the ``image()`` method as follows:
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.. code-block:: yaml
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image:
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- file: "image.jpg"
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id: my_image
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resize: 120x120
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...
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display:
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...
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lambda: |-
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it.image(0, 0, id(medium_gray), id(my_image));
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This will draw the complete image with the given shade of gray.
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To create a new color as needed in code:
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.. code-block:: yaml
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display:
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...
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lambda: |-
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float white_intensity = 0.5;
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Color variable_gray(0, 0, 0, white_intensity);
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it.rectangle(0, 0, it.get_width(), it.get_height(), variable_gray);
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The last argument of the ``Color`` constructor is the intensity of the white element; it is a percentage
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(value of range 0 to 1). It may be defined by another variable so it is adjustable in code.
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See Also
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--------
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- :doc:`index`
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- :apiref:`ssd1327_base/ssd1327_base.h`
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- :ghedit:`Edit`
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