Power Pins

  • Vin - this is the power pin. Since the sensor chip uses 3 VDC, we have included a voltage regulator on board that will take 3-5VDC and safely convert it down. To power the board, give it the same power as the logic level of your microcontroller - e.g. for a 5V microcontroller like Arduino, use 5V
  • 3Vo - this is the 3.3V output from the voltage regulator, you can grab up to 100mA from this if you like
  • GND - common ground for power and logic

I2C Logic Pins

  • SCL - I2C clock pin, connect to your microcontroller I2C clock line. On the breakouts, this pin is level shifted so you can use 3-5V logic. There's a 10K pullup on this pin.
  • SDA - I2C data pin, connect to your microcontroller I2C data line.
  • On the breakouts, this pin is level shifted so you can use 3-5V logic. There's a 10K pullup on this pin.
  • STEMMA QT - These connectors allow you to make I2C connections to dev boards with STEMMA QT connectors or to other things with various associated accessories.

Other Pins

  • RST - Module signal reset. Reset low.
  • SET - Set pin. High when working status, low level is sleeping mode.
This guide was first published on Jul 22, 2020. It was last updated on Jul 22, 2020.
This page (Pinouts) was last updated on Sep 18, 2020.