• 5.0V - Connected to the display backlight
  • 3.3V - Connected to the display power and also the STEMMA QT / Qwiic connector
  • GND - Ground for everything


The display is a 1.54" wide-angle TFT LCD.

  • MOSI, SCK, GPIO #25, CE0 - These are the display control pins. Note that MISO is not connected, even though it is an SPI pin, because you cannot read back from the display.
  • GPIO #26 - This is the display backlight pin. Used to turn on and off the backlight.

Buttons and Joystick

These pins have a 10K pullup to 3.3V so when the button is pressed or the joystick is moved/pressed, you will read a LOW voltage on these pins.

  • GPIO#17 - Button
  • GPIO #16 - Joystick select
  • GPIO #22 - Joystick left
  • GPIO #23 - Joystick up
  • GPIO #24 - Joystick right
  • GPIO #27 - Joystick down


  • GPIO #18, GPIO#19, GPIO #20, GPIO #21 - I2S Digital Audio.
  • Speakers - The two speaker connectors are located on the bottom in the middle, labeled Right and Left. Plug in an enclosed speaker or  use a JST 2PH cable to attach custom speakers.
  • Microphones - The two mics are in the middle of each side, labeled Left Mic and Right Mic.
  • Headphones - A headphone jack is located on the bottom right. Use any headphones or Line-Out to another audio system.
  • On/Off Switch - Located on the left, towards the top, switches audio on and off.

STEMMA QT Connector

Digital/Analog Connectors

DotStar LEDs

Three fully color RGB addressable LEDs can provide feedback or a light show. Uses DotStar protocol (not NeoPixel) so any microcomputer can easily control the lights.

  • GPIO #5 - DotStar LED data pin.
  • GPIO #6 - Dotstar LED clock pin.


  • GPIO #4 - The fan is on this pin.

This guide was first published on Oct 06, 2020. It was last updated on Jun 18, 2024.

This page (Pinouts) was last updated on Mar 08, 2024.

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