Adafruit AirLift Shield ESP32, Руководство пользователя

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Having WiFi managed by a separate chip means your code is simpler, you don't have to cache socket
data, or compile in & debug an SSL library. Send basic but powerful socket-based commands over 8MHz
SPI for high speed data transfer. You can use any 3V or 5V Arduino, any chip from the ATmega328 and up
(although the '328 will not be able to do very complex tasks or buffer a lot of data). It also works great with
CircuitPython, a SAMD51/Cortex M4 minimum required since we need a bunch of RAM. All you need is the
SPI bus and 2 control pins plus a power supply that can provide up to 250mA during WiFi usage.
The ESP32 also supports BLE (Bluetooth Low Energy), though not simultaneously with WiFi. Many of our
CircuitPython builds include native support for ESP32 BLE. You use a few control pins and the RXI and
TXO pins to talk to the ESP32 when it's in BLE mode.
We placed an ESP32 module on a shield with a separate 3.3V regulator, and a tri-state chip for MOSI so
you can share the SPI bus with other shields. We also tossed on a micro SD card socket, you can use that
to host or store data you get from the Internet. Arduinos based on the ATmega328 (like the UNO) cannot
use both the WiFi module and SD library at the same time, they don't have enough RAM. Again, we
recommend an M0 or M4 chipset for use with Arduino, M4 for CircuitPython!
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