Datasheet

The I2C address is 0x3C and cannot be changed

Optional Buttons

We had a little bit of space so we added three mini tactile buttons that you can use for user

interface. We label them A B and C because each Feather has slightly different pin

numbering schemes and we wanted to make it 'universal'

If you're using Atmega32u4 or ATSAMD21 M0 Feather

Button A is #9 (note this is also used for the battery voltage divider so if you want

to use both make sure you disable the pullup when you analog read, then turn on the

pullup for button reads)

Button B is #6

Button C is #5

If you're using ESP8266:

Button A is #0

Button B is #16

Button C is #2

If you're using WICED/STM32 Feather

Button A is #PA15

Button B is #PC7