The default I2C address is 0x38. It cannot be changed.

Power Pins

The sensor on the breakout requires between a 2.7V and 5.5V, and can be easily used with most microcontrollers from an Arduino to a Feather or something else.

• 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 5V micro like Arduino, use 5V
• GND - common ground for power and logic

I2C Logic Pins

• SCL - I2C clock pin, connect to your microcontrollers I2C clock line. The logic level is the same as VIN and it has a 10K pullup already on it.
• SDA - I2C data pin, connect to your microcontrollers I2C data line. The logic level is the same as VIN. and it has a 10K pullup already on it.
• STEMMA QT - These connectors allow you to connect to dev boards with STEMMA QT connectors or to other things with various associated accessories

The "on" LED

There is a small LED next to the left STEMMA QT connector for telling when the breakout is on. On Rev A and B boards (denoted in a circled letter in the center back of the board). this LED cannot be disabled (unless the user removes or covers up the LED).

Rev C, below, has a small jumper near the LED. Uncut, the LED is on when the board is on. If the LED is not wanted, cut the small trace between the gold pads to completely disable the LED. To reenable, solder bridge the two gold pads.