Datasheet

SDA - I2C data pin, connect to your microcontrollers I2C data line.

Other Pins:

INT - this is the INTerrupt pin from the sensor. It can be programmed to do a couple

different things by noodling with the i2c registers. For example trigger when a

conversion is done, or when the light level has changed a lot, etc. We don't have

library support for this pin