Lanbon L9 Smart Switch Panel

Drivers

• Processor: ESP32-S3-Wroom-1U
• Touchscreen: 6336
• Display: ST7789V2 (using ili9xxxx plaform)

GPIO Pinout

i80 (used for display)

Pin	Function
GPIO13	WR
GPIO18	RD
GPIO6	data[0]
GPIO7	data[1]
GPIO15	data[2]
GPIO16	data[3]
GPIO10	data[4]
GPIO9	data[5]
GPIO46	data[6]
GPIO3	data[7]
GPIO21	cs
GPIO17	dc
GPIO4	reset

I²C (used for touchscreen)

Pin	Function
GPI035	i2c SDA
GPIO0	i2c SCL

Backlight

Pin	Function
GPI42	backlight

Relay

Pin	Function
GPIO36	relay

How To Flash

See BlackAdder's instruction on how to flash custom firmware for the L8, referring to the following diagram for the L9 connector pinout. No soldering required. IMPORTANT: Both 5v and 3.3v must be supplied.

Example Configuration

psram:
  speed: 80MHz

output:
  - platform: ledc
    pin: GPIO42
    id: backlight_pwm
  - platform: gpio
    pin: GPIO36
    id: relay

light:
  - platform: monochromatic
    name: "Backlight"
    id: backlight
    output: backlight_pwm
    restore_mode: ALWAYS_ON
  - platform: binary
    id: local_light
    name: "Light"
    output: relay

power_supply:
  - id: "i80_rd_pin"
    pin:
      number: 18
      inverted: true

spi:
  type: octal
  clk_pin: GPIO13 # WR pin
  data_pins:
    - GPIO6
    - GPIO7
    - GPIO15
    - GPIO16
    - GPIO10
    - GPIO9
    - ignore_strapping_warning: true
      number: GPIO46
    - ignore_strapping_warning: true
      number: GPIO3

i2c:
  sda: GPIO35
  scl:
    ignore_strapping_warning: true
    number: GPIO0

display:
  - id: langbon_L9
    platform: mipi_spi
    model: CUSTOM
    invert_colors: true
    dimensions:
      height: 320
      width: 170
      offset_width: 35
    bus_mode: octal
    dc_pin: GPIO17
    cs_pin: GPIO21
    reset_pin: GPIO4
    auto_clear_enabled: false
    update_interval: never
    rotation: 0

touchscreen:
  platform: ft63x6
  calibration:
    x_min: 0
    y_min: 3
    x_max: 169
    y_max: 319
  on_release:
    - if:
        condition: lvgl.is_paused
        then:
          - lvgl.resume:
          - lvgl.widget.redraw:
          - light.turn_on: backlight

lvgl:
  on_idle:
    timeout: !lambda "return 10000;"
    then:
      - light.turn_off: backlight
      - lvgl.pause:
  pages: ...