Power Pins

  • VIN - This is the power pin. To power the board, give it the same power as the logic level of your microcontroller - e.g. for a 3V micro like the Feather RP2040, use 3V, and for a 5V micro like Arduino, use 5V.
  • GND - This is common ground for power and logic.

I2C Logic Pins

  • SCL - This is the I2C clock pin. Connect it to your microcontroller's I2C clock line. Note that there is no pullup on this pin; this is simply a passthrough from a microcontroller to STEMMA QT breakout, which typically come with level shifting and pullups, if needed.
  • SDA - This is the I2C data pin. Connect it to your microcontroller's I2C data line. Note that there is no pullup on this pin; this is simply a passthrough from a microcontroller to STEMMA QT breakout, which typically come with level shifting and pullups, if needed.
  • STEMMA QT connectors - There are five Qwiic / STEMMA QT connectors across the center of the board. These connectors allow you to connect to development boards with STEMMA QT connectors, or to other things, with various associated accessories.
Please remember: this is a 'passive' hub. It is only a mechanical assistant for connecting many STEMMA QT / Qwiic boards together. For example, you cannot connect five of the same-address-sensor-boards and have them individually work.

on LED

  • on LED - In the upper left corner, you'll find a green LED labeled on. This LED lights up to indicate the board is being powered.

This guide was first published on Nov 16, 2022. It was last updated on Mar 08, 2024.

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

Text editor powered by tinymce.