User Manual

We placed an ESP32 module on a FeatherWing with a separate 3.3V regulator, and a tri-state chip for MOSI so you can

share the SPI bus with other 'Wing. Comes fully assembled and tested, pre-programmed with ESP32 SPI WiFi co-

processor firmware that you can use in CircuitPython to use this into WiFi co-processsor over SPI + 2

pins (https://adafru.it/Evl). We also toss in some header so you can solder it in and plug into a doubler, but you can also

pick up a set of stacking headers to stack above/below your Feather.

We've tested this with all our Feathers and it should work just fine with them except the ESP8266 & ESP32 Feathers

(cause they already have WiFi!). For use in Arduino, the '328 and '32u4 you can do basic connectivity and data transfer

but they do not have a lot of RAM so we don't recommend them - use the M0, M4 or similar, for best results! For

CircuitPython use, a Feather M4 or nRF52840 works best - the M0 series does not have enough RAM in CircuitPython.

The firmware on board is a slight variant of the Arduino WiFiNINA core, which works great! (https://adafru.it/E7O)

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

processor-featherwing

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