Datasheet

You don't need to connect the ADDR (i2c address change) or INT (interrupt output) pins.

The ADDR pin can be used if you have an i2c address conflict, to change the address. Connect it to

ground to set the address to 0x29, connect it to 3.3V (vcc) to se t the address to 0x49 or leave it

floating (unconnected) to use address 0x39.

The INT pin is an ouput from the sensor used when you have the sensor configured to signal when

the light level has changed. We don't have that code written in this tutorial so you don't have to use

it. If you do end up using it, use a 10K-100K pullup from INT to 3.3V (vcc)