Datasheet

Configuration, setup, and data is received/transmitted over SPI. All Feathers have the default SPI port on the same

pins, so we use MOSI/MISO/SCK in this location. They are 3.3V logic, 5V tolerant.

A Chip Select pin is also required. By default we use this pin:

Which is connected to pin #10 on Feather Teensy 3, 32u4, 328p, M4 and M0, pin #15 on ESP8266, and PB4 on

WICED.

You can also get to the CS pin from the left group of breakouts. To change CS pin, solder this pad to a different pin

and cut this jumper: