Default I2C address is 0x51.

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 5V micro like Arduino, use 5V. It can be powered between from 3.3V to 5V.
• 3Vo - this is the 3.3V output from the onboard regulator.
• GND - common ground for power and logic.

I2C Logic Pins

• SCL - I2C clock pin, connect to your microcontroller's I2C clock line. This pin can use 3-5V logic, and there's a 10K pullup on this pin.
• SDA - I2C data pin, connect to your microcontroller's I2C data line. This pin can use 3-5V logic, and there's a 10K pullup on this pin.
• STEMMA QT - These connectors allow you to connect to development boards with STEMMA QT (Qwiic) connectors or to other things with various associated accessories.

Interrupt Pin

• INT - This is the interrupt pin. You can set up the sensor to pull this low when certain conditions are met such as proximity or lux level thresholds being crossed.

Power LED and Jumper

• Power LED - on the left side of the board, above the STEMMA QT connector, is the power LED, labeled on. It is a green LED.
• LED jumper - on the back of the board is a jumper for the power LED. It is labeled LED on the board silk. If you want to disable the power LED, cut the trace on this jumper.