GeekMagic SmallTV Pro

Product Description

The GeekMagic SmallTV Pro is a LCD display designed to look like a mini computer.

It is USB-C powered and has an ESP32 inside (sometimes labeled GM32-N16).

The LCD panel has a 28x28mm size resulting in a 240x240 pixel resolution.

Available on AliExpress at various vendors.

Product Images

Flash ESPHome

Flashing the device can be done in 2 different ways.

1. Upload .bin file (using original firmware)(easiest)

The original firmware comes with the option to upload a custom .bin file. This can be done by connecting to the device’s access point over Wi-Fi. Open a browser and navigate to the IP address displayed on the screen of the device. Find the “Firmware update” section in the web interface and upload your .bin file. The .bin file can be generated with ESPHome Device Builder using the correct config below.

2. Manual flashing via Serial (Disassembly needed)

If the first option is not usable for you, you can always flash the device manually by disassembling it first. Unscrew the 2 screws at the bottom of the device and slide the plastic casing open from the back of the device. Because this device doesn’t have a USB to serial chip, we need to connect some wires to it in order to flash it.

PCB and Pinout - ESP32:

PCB and Pinout - GM32-N16:

Note: To enter flash mode, GPIO0 must be pulled to GND during power-up.

Basic Configuration

https://github.com/esphome/devices.esphome.io/blob/main/src/docs/devices/geekmagic-smalltv-pro/config.yaml

esphome:
  name: geekmagic-smalltv-pro
  friendly_name: GeekMagic SmallTV Pro

esp32:
  variant: esp32

esp32_touch:
  setup_mode: false
  iir_filter: 10ms

binary_sensor:
  - platform: esp32_touch
    name: "Touch"
    pin: GPIO32
    threshold: 1450
    filters:
      - delayed_on: 50ms
      - delayed_off: 300ms

spi:
  clk_pin: GPIO18
  mosi_pin: GPIO23
  interface: hardware
  id: spihwd

output:
  - platform: ledc
    pin: GPIO25
    inverted: true
    id: backlight_pwm

light:
  - platform: monochromatic
    output: backlight_pwm
    name: "Backlight"
    id: backlight
    restore_mode: ALWAYS_ON
    default_transition_length: 1s

display:
  - platform: mipi_spi
    id: my_display
    model: ST7789V
    spi_id: spihwd
    dc_pin: GPIO02
    reset_pin: GPIO04
    dimensions:
      width: 240
      height: 240
      offset_width: 0
      offset_height: 0
    invert_colors: true
    color_depth: 16
    spi_mode: MODE3
    data_rate: 40MHz
    update_interval: 1s
    show_test_card: true