Adafruit AirLift Shield ESP32 User Manual

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 (https://adafru.it/Evl). We also include some
header so you can solder it in and plug right into your Arduino-compatible, but you can also pick up a set
of stacking headers to stack above/below your board.
We've tested this with all our Metros and it should work just fine with them except the Metro M4
Airlifts (https://adafru.it/F6o) (because 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 Metro M0, M4 or similar, for best results! For CircuitPython use, a Metro M4 works best -
the M0 series does not have enough RAM in CircuitPython.
© Adafruit Industries https://learn.adafruit.com/adafruit-airlift-shield-esp32-wifi-co-processor Page 6 of 56

Adafruit AirLift Shield ESP32 Specifications

General

Microcontroller	ESP32
Interface	SPI
WiFi	802.11 b/g/n
Voltage Level	3.3V
Type	Shield
SD Card Socket	No
Wireless Connectivity	WiFi
Input Voltage	5V
Flash Memory	4 MB
SRAM	520 KB
Clock Speed	240 MHz
USB	No
Compatible Boards	Arduino Uno, Mega
Antenna	Ceramic
Digital I/O Pins	Not directly accessible (used for SPI communication)