ILI9xxx TFT LCD Series

Models

With this display driver you can control the following displays:
  • ILI9341

  • ILI9342

  • ILI9481

  • ILI9481-18 (ILI9481 in 18 bit, i.e. 262K color, mode)

  • ILI9486

  • ILI9488

  • ILI9488_A (alternative gamma configuration for ILI9488)

  • M5STACK

  • S3BOX

  • S3BOX_LITE

  • ST7796

  • ST7789V

  • TFT 2.4

  • TFT 2.4R

  • WAVESHARE_RES_3_5 (Waveshare Pico-ResTouch-LCD-3.5)

More display drivers will come in the future.

Usage

This component is the successor of the ILI9341 component supporting more display driver chips from the ILI and related families.

The ILI9xxx display platform allows you to use ILI9341 (datasheet, Aliexpress) and other displays from the same chip family with ESPHome. As this is a somewhat higher resolution display and requires additional pins beyond the basic SPI connections, and a reasonable amount of RAM, it is not well suited for the ESP8266.

Note: use of 16 bit colors requires double the amount of RAM as 8 bit, and may need PSRAM to be available.

../../_images/ili9341-full.jpg

ILI9341 display

# Example minimal configuration entry
display:
  - platform: ili9xxx
    model: ili9341
    dc_pin: 27
    reset_pin: 33
    lambda: |-
      it.fill(COLOR_BLACK);
      it.print(0, 0, id(my_font), id(my_red), TextAlign::TOP_LEFT, "Hello World!");

Configuration variables:

  • model (Required): The model of the display. Options are:

    • M5STACK, TFT 2.4, TFT 2.4R, S3BOX, S3BOX_LITE, WSPICOLCD

    • ILI9341, ILI9342, ILI9486, ILI9488, ILI9488_A (alternative gamma configuration for ILI9488)

    • ILI9481, ILI9481-18 (18 bit mode)

    • ST7789V, ST7796

  • dc_pin (Required, Pin Schema): The DC pin.

  • reset_pin (Optional, Pin Schema): The RESET pin.

  • lambda (Optional, lambda): The lambda to use for rendering the content on the display. See Display Rendering Engine for more information.

  • update_interval (Optional, Time): The interval to re-draw the screen. Defaults to 5s.

  • auto_clear_enabled (Optional, boolean): Whether to automatically clear the display in each loop (‘’true’’, default), or to keep the existing display content (must overwrite explicitly, e.g., only on data change).

  • pages (Optional, list): Show pages instead of a single lambda. See Display Pages.

  • id (Optional, ID): Manually specify the ID used for code generation.

  • color_palette (Optional): The type of color pallet that will be used in the ESP’s internal 8-bits-per-pixel buffer. This can be used to improve color depth quality of the image. For example if you know that the display will only be showing grayscale images, the clarity of the display can be improved by targeting the available colors to monochrome only. Options are:

    • NONE (default)

    • GRAYSCALE

    • IMAGE_ADAPTIVE

  • color_order (Optional): Should be one of bgr (default) or rgb.

  • color_palette_images (Optional): A list of image files that will be used to generate the color pallet for the display. This should only be used in conjunction with -color_palette: IMAGE_ADAPTIVE above. The images will be analysed at compile time and a custom color pallet will be created based on the most commonly occuring colors. A typical setting would be a sample image that represented the fully populated display. This can significantly improve the quality of displayed images. Note that these images are not stored on the ESP device, just the 256byte color pallet created from them.

  • dimensions (Optional): Dimensions of the screen, specified either as width x height (e.g 320x240) or with separate config keys. If not provided the dimensions will be determined by the model selected.

    • height (Required, int): Specifies height of display in pixels.

    • width (Required, int): Specifies width of display.

    • offset_width (Optional, int): Specify an offset for the x-direction of the display, typically used when an LCD is smaller than the maximum supported by the driver chip. Default is 0

    • offset_height (Optional, int): Specify an offset for the y-direction of the display. Default is 0.

  • data_rate (Optional): Set the data rate of the SPI interface to the display. One of 80MHz, 40MHz (default), 20MHz, 10MHz, 5MHz, 2MHz, 1MHz, 200kHz, 75kHz or 1kHz. If you have multiple ILI9xxx displays they must all use the same data_rate.

  • spi_mode (Optional): Set the mode for the SPI interface to the display. Default is MODE0 but some displays require MODE3.

  • invert_colors (Optional): With this boolean option you can invert the display colors. Note some of the displays have this option set automatically to true and can’t be changed.

  • 18bit_mode (Optional): With this boolean option you can manual enable or disable the 18 bit color mode.

  • rotation (Optional): Rotate the display presentation in software. Choose one of , 90°, 180°, or 270°. This option cannot be used with transform.

  • transform (Optional): Transform the display presentation using hardware. All defaults are false. This option cannot be used with rotation.

    • swap_xy (Optional, boolean): If true, exchange the x and y axes.

    • mirror_x (Optional, boolean): If true, mirror the x axis.

    • mirror_y (Optional, boolean): If true, mirror the y axis.

Note: To rotate the display in hardware use one of the following combinations - with 90 and 270 rotations you will also need to use dimensions: to swap the height and width (see example below.)

  • 90 degrees - use swap_xy with mirror_x

  • 180 degrees - use mirror_x with mirror_y

  • 270 degrees - use swap_xy with mirror_y

Configuration examples

To use hardware rotation, use both dimensions and transform, e.g. this config will turn a landscape display with height 320 and width 480 into portrait. Note that the dimensions are those of the final display.

transform:
  swap_xy: true
  mirror_x: true
dimensions:
  height: 480
  width: 320

To utilize the color capabilities of this display module, you’ll likely want to add a color: section to your YAML configuration; please see color for more detail on this configuration section.

To use colors in your lambda:

color:
  - id: my_red
    red: 100%
    green: 3%
    blue: 5%

...

display:
    ...
    lambda: |-
      it.rectangle(0,  0, it.get_width(), it.get_height(), id(my_red));

To bring in color images:

image:
  - file: "image.jpg"
    id: my_image
    resize: 200x200
    type: RGB24

...

display:
    ...
    lambda: |-
      it.image(0, 0, id(my_image));

To configure a dimmable backlight:

# Define a PWM output on the ESP32
output:
  - platform: ledc
    pin: 32
    id: gpio_32_backlight_pwm

# Define a monochromatic, dimmable light for the backlight
light:
  - platform: monochromatic
    output: gpio_32_backlight_pwm
    name: "Display Backlight"
    id: back_light
    restore_mode: ALWAYS_ON

To configure an image adaptive color pallet to show greater than 8 bit color depth with a RAM limited screen buffer:

image:
  - file: "sample_100x100.png"
    id: myimage
    resize: 100x100
    type: RGB24

display:
  - platform: ili9xxx
    model: ili9341
    dc_pin: 4
    reset_pin: 22
    rotation: 90
    id: tft_ha
    color_palette: IMAGE_ADAPTIVE
    color_palette_images:
      - "sample_100x100.png"
      - "display_design.png"
    lambda: |-
      it.image(0, 0, id(myimage));

Using the transform options to hardware rotate the display on a Lilygo T-Embed. This has an st7789v but only uses 170 pixels of the 240 width. This config rotates the display into landscape mode using the driver chip.

display:
  - platform: ili9xxx
    model: st7789v
    dimensions:
      height: 170
      width: 320
      offset_height: 35
      offset_width: 0
    transform:
      swap_xy: true
      mirror_x: false
      mirror_y: true
    color_order: bgr
    data_rate: 80MHz
    cs_pin: 10
    dc_pin: GPIO13
    reset_pin: GPIO9

For Lilygo TTGO Boards if you move from the st7789v to this you need the following settings to make it work.

display:
  - platform: ili9xxx
    model: st7789v
    #TTGO TDisplay 135x240
    dimensions:
      height: 240
      width: 135
      offset_height: 40
      offset_width: 52
    # Required or the colors are all inverted, and Black screen is White
    invert_colors: true

See Also