i2c:
  - id: i2c_bus
    sda: GPIO8
    scl: GPIO9
    scan: true

ch422g:
  - id: io_expander
    i2c_id: i2c_bus

touchscreen:
  - platform: gt911
    id: touch_gt911
    i2c_id: i2c_bus
    address: 0x5D           # confirmed via Waveshare's documented I2C address map
    interrupt_pin: GPIO4
    reset_pin:
      ch422g: io_expander
      number: 1              # EXIO1 = TP_RST, per Waveshare pinout
    display: lcd_display

display:
  - platform: mipi_rgb
    id: lcd_display
    model: WAVESHARE-5-1024X600   # ESPHome's closest built-in preset: same ST7701 chip, data pins,
                                    # and CH422G reset/enable wiring as this board's 1024x600 panel
    dimensions:
      width: 1024
      height: 600
      pad_width: 0    # the preset's default width/height (1024x600) don't match its inherited
      pad_height: 0   # native_width/native_height (800x480 from the base 4.3" model), which makes
                       # ESPHome's offset math go negative unless pad is forced explicitly here
    enable_pin:
      - ch422g: io_expander
        number: 2              # EXIO2 = DISP (backlight enable) — inherited from the base preset
      - ch422g: io_expander
        number: 6              # EXIO6 = LCD_VDD_EN (VCOM enable) — the built-in preset doesn't set
                                 # this, but the Waveshare wiki confirms VCOM must be driven high on
                                 # this board or the panel won't display correctly. Added explicitly.