User Manual

Pinouts

Power Pins

GND - Common power/logic ground.

BAT - Positive voltage from JST on Feather for an

optional

LiPo battery.

USB - Positive voltage to/from the Micro USB jack if connected.

EN - 3.3V regulator's enable pin. It's pulled up, so connect to ground to disable the 3.3V regulator

3V - this is the output from the 3.3V regulator. The regulator can supply 500mA peak but half of that is drawn by

the ESP32, and it's a fairly power-hungry chip. So if you need a ton of power for stuff like LEDs, motors, etc. Use

the USB or BAT pins, and an additional regulator

SPI and Control Pins

To keep transfers speedy, we use SPI

not UART Serial.

Serial is too slow and hard to synchronize. This uses more pins

but the experience is much better!

https://learn.adafruit.com/adafruit-airlift-featherwing-esp32-wifi-co-

processor-featherwing

Page 6 of 39