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ESP32 TouchDown~

Features~

  • ESP32-WROOM-32D
  • ILI9488 3.5" (480*320) TFT screen in 4-wire SPI mode
  • FT62x6 Capacitive Touch Controller
  • APK2112 3.3V regulator
  • MCP73831 battery management IC
  • CP2102 USB-to-UART IC
  • USB-C connector
  • Piezo Speaker
  • microSD card holder
  • Battery voltage divider connected to GPIO35
  • Stemma / JST-PH I2C connector
  • Compact size: 100x57x15mm

This board was originaly created for the FreeTouchDeck project and the hardware is also open source. Due to the extensive documentation it was easy to port openHASP to the ESP32-Touchdown.

Pros Cons
480x320 display 4 MB flash
Capactitive touch No PSram
Battery connector
Battery sensor

The speaker and SD card are not supported by openHASP 0.6.3.

Info

Any 3.7V (nominal voltage) LiPo will work, 2000mAh battery should suffice. Be sure to have the correct polarity. If the connecter at the end of the battery does not match, gently remove the pins from the connector and put them back in the correct orientation.

Available from:
Tindie   Eplop (UK)   PCBway

Product Video~

Backlight Control~

To enable backlight control, make sure the solder jumper pad is in position 2-1:

Backlight Control

3D Printed Cases~

You can find several different 3D printable cases in the ESP32 TouchDown repository:

Flashing~

The ESP32 TouchDown can easily be flashed over USB like any ESP32 development board.

GPIO Settings~

These pins can be used freely as GPIOs:

PCB Blueprint~

The ESP32 TouchDown is fully Open Source Hardware:

  • Schematics
  • Bill of materials
  • PCB layout
  • Datasheets

PCB Dimensions

HASP build_flags~

Specify the LCD Configuration to use and define the GPIOs in the environment build flags:

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build_flags =
    ${env.build_flags}
    ${esp32.build_flags}
    ${esp32.vspi}        ; Use VSPI hardware SPI bus

;region -- TFT_eSPI build options ------------------------
    -D USER_SETUP_LOADED=1
    -D ILI9488_DRIVER=1
    -D TFT_ROTATION=0 ; 0=0, 1=90, 2=180 or 3=270 degree
    -D TFT_WIDTH=320
    -D TFT_HEIGHT=480
    -D TFT_CS=15  ;// Chip select control pin
    -D TFT_DC=2  ;// Data Command control pin
    -D TFT_RST=4 ;// Reset pin (could connect to RST pin)
    -D TFT_BCKL=5  ;None, configurable via web UI (e.g. 2 for D4)
    -D SUPPORT_TRANSACTIONS
    -D TOUCH_DRIVER=6336 ; XPT2606 Resistive touch panel driver 
    -D TOUCH_SDA=21
    -D TOUCH_SCL=22
    -D TOUCH_IRQ=27   ; not connected
    -D TOUCH_RST=-1   ; not used, connected to 3.3V
    -D TOUCH_FREQUENCY=400000
    -D SPI_FREQUENCY=27000000
    -D SPI_READ_FREQUENCY=16000000
;endregion

Last update: 2022-09-18