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Sunton ESP32-2424S012

ESP32-2424s012

Often sold as a "LVGL" development board. AliExpress

Full configuration can be found at esp32-2424s012.yaml.

This code on ESP32-2424s012

ESP32

This devices uses a ESP32-C3; so some changes to the esp32 definitions are needed to use the right toolchain.

esp32:
  board: esp32-c3-devkitm-1
  variant: esp32c3
  framework:
    type: arduino

SPI Bus

SPI bus utilised by the GC9A01 screen

spi:
  mosi_pin: GPIO7
  miso_pin: GPIO2
  clk_pin: GPIO6

The touchscreen on this device utilises the I2C bus; using GPIO4 and 5.

I2C Bus

i2c:
 - sda: GPIO4
   scl: GPIO5
   scan: true
   id: bus_a

Display

The GC9A01 is not yet supported by the ESPhome distribution; while there is a pull request the code from it does not work with recent versions of esphome. You can find an updated version of this component that does in this repository, the following yaml includes it:

external_components:
  - source: components
    components: ["gc9a01"]

More information on this external component can be found in it's README.

Now we utilise it as a display:

display:
  - platform: gc9a01
    cs_pin: GPIO10
    dc_pin: GPIO2
    update_interval: 50ms
    lambda: |-
  • The lambda function for generating the weather station display can be found in the full yaml esp32-2424s012.yaml

Backlight

output:
  - platform: ledc
    pin: GPIO3
    id: backlight_pin
  • The TFT Backlight is on GPIO3 and defined using ledc and a monochromatic light
light:

  - platform: monochromatic
    output: backlight_pin
    name: "Display Backlight"
    id: back_light
    restore_mode: ALWAYS_ON
  • Light components for the backlight with a default of ALWAYS_ON