• VIN - this is the power pin. Since the sensor chip uses 3VDC, we have included a voltage regulator on board that will take 3-5VDC and safely convert it to 3VDC. 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

• SCL - the I2C clock pin, connect to your microcontroller's I2C clock line.
• SDA - the I2C data pin, connect to your microcontroller's I2C data line.
• STEMMA QT - These connectors allow you to connectors to dev boards with STEMMA QT connectors or to other things with various associated accessories

INT - the interrupt pin. It is an open-drain interrupt. To use, connect the pin to a GPIO pin on your microcontroller.

GPIO - the GPIO pin on the breakout. It is an open-drain pin that can be used as an input or output.

The AS7343 includes LED driver circuitry. This breakout has a white LED connected to the driver. It can be controlled using the CircuitPython or Arduino libraries.

This can be used to shine white light onto an object and measure the colors in the light being reflected back from the object into the sensor.

Above the left STEMMA QT connector there is a small green ON power indicator LED. When the breakout is powered this LED will turn on. 

On the back of the AS7343 breakout there is a jumper with a small trace between two pads that can be cut to disable the ON power indicator LED on the board.

If you do not want that indicator lit, carefully cut the trace. It can always be reconnected with a bit of solder.