Waveshare ESP32-P4 7B as a Home Assistant display

# Waveshare ESP32-P4-WIFI6-Touch-LCD-7B with ESPHome and Home Assistant: display, touch, Wi-Fi
# and backlight, a Home Assistant temperature in the middle and a button that turns a light on.
# Pins and settings of the "Home Assistant display" firmware (3.9.0), which runs on the board;
# this example itself is compiled with ESPHome 2026.9.1 but not tried as is.
esphome:
  name: waveshare-7b
  friendly_name: Waveshare 7B
  # ESPHome 2026.9.0 crashes while setting up the display of an ESP32-P4 revision 3: 2026.9.1 at
  # least.
  min_version: 2026.9.1

esp32:
  variant: esp32p4
  # ESP32-P4 revision 3 (production silicon), whose normal frequency is 400 MHz.
  engineering_sample: false
  cpu_frequency: 400MHz
  flash_size: 32MB
  framework:
    type: esp-idf
    advanced:
      enable_idf_experimental_features: true
      execute_from_psram: true

# At its default speed, the PSRAM gave about thirty "lcd.dsi underrun" per second.
psram:
  mode: hex
  speed: 200MHz

# Wi-Fi is on a second chip, an ESP32-C6, linked over SDIO. Its reset (GPIO54) is active high:
# false gives "sdmmc_card_init failed".
esp32_hosted:
  variant: esp32c6
  active_high: true
  clk_pin: GPIO18
  cmd_pin: GPIO19
  d0_pin: GPIO14
  d1_pin: GPIO15
  d2_pin: GPIO16
  d3_pin: GPIO17
  reset_pin: GPIO54
  slot: 1
  sdio_frequency: 20MHz
  use_psram: true

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  ap:
    ssid: "Waveshare 7B fallback"

captive_portal:

api:
  encryption:
    key: !secret api_encryption_key
  # With no Home Assistant connected, ESPHome restarts after 15 min by default.
  reboot_timeout: 60min

ota:
  - platform: esphome

logger:
  hardware_uart: USB_SERIAL_JTAG

# Bus of the GT911 touch and of the audio chips.
i2c:
  - id: bsp_bus
    sda: GPIO7
    scl: GPIO8
    frequency: 400kHz

# Supply of the display's MIPI-DSI link: LDO 3 at 2.5 V.
esp_ldo:
  - voltage: 2.5V
    channel: 3

# EK79007 panel: ESPHome's model knows the board (GPIO33 reset included).
display:
  - id: panel
    platform: mipi_dsi
    model: WAVESHARE-ESP32-P4-WIFI6-TOUCH-LCD-7B
    dimensions:
      width: 1024
      height: 600
    pixel_mode: 16bit
    color_order: RGB
    update_interval: never
    auto_clear_enabled: false

# Waveshare's code says the GT911 reset is not connected, but it is on GPIO23: without it and
# without both mirrors, one touch recognised in five minutes.
touchscreen:
  - id: touch
    platform: gt911
    reset_pin: GPIO23
    update_interval: 50ms
    transform:
      swap_xy: false
      mirror_x: true
      mirror_y: true

# Backlight: inverted output, at 5 kHz.
output:
  - platform: ledc
    id: backlight_pwm
    pin:
      number: GPIO32
      inverted: true
    frequency: 5000Hz

light:
  - platform: monochromatic
    id: backlight
    name: "Backlight"
    output: backlight_pwm
    restore_mode: RESTORE_DEFAULT_ON

# Replace with your own entities. For the button, tick "Allow the device to perform Home
# Assistant actions" in Home Assistant (options of the ESPHome device).
sensor:
  - platform: homeassistant
    id: living_room_temperature
    entity_id: sensor.living_room_temperature
    on_value:
      - lvgl.label.update:
          id: temperature_label
          text:
            format: "%.1f °C"
            args: [x]

# LVGL's built-in fonts have no accented letters: Roboto, downloaded at build time (it only
# lacks combining accents, hence ignore_missing_glyphs).
font:
  - file: "gfonts://Roboto"
    id: font_text
    size: 28
    glyphsets: [GF_Latin_Core]
    ignore_missing_glyphs: true
  - file: "gfonts://Roboto@700"
    id: font_big
    size: 64
    glyphsets: [GF_Latin_Core]
    ignore_missing_glyphs: true

lvgl:
  displays: [panel]
  touchscreens: [touch]
  # The panel is mounted upside down compared with its driver: 180 for the board the right way
  # up, 0 if you mount it upside down. The touch follows by itself.
  rotation: 180
  color_depth: 16
  byte_order: little_endian
  buffer_size: 100%
  default_font: font_text
  pages:
    - id: home_page
      widgets:
        - label:
            id: temperature_label
            align: CENTER
            y: -70
            text: "--"
            text_font: font_big
        - button:
            align: CENTER
            y: 100
            width: 320
            height: 100
            widgets:
              - label:
                  align: CENTER
                  text: "Living room light"
            on_click:
              - homeassistant.action:
                  action: light.toggle
                  data:
                    entity_id: light.living_room