CircuitPython

It's easy to use the Adafruit AirLift breakout with CircuitPython and the Adafruit CircuitPython ESP32SPI module.  This module allows you to easily add WiFi to your project.

The ESP32SPI library requires an M4 or better microcontroller! The M0 will not work.

CircuitPython Microcontroller Pinout

Since all CircuitPython-running Feathers follow the same pinout, you do not need to change any of the pins listed below.

To use the ESP32's pins, copy the following lines into your code:

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esp32_cs = DigitalInOut(board.D13)
esp32_ready = DigitalInOut(board.D11)
esp32_reset = DigitalInOut(board.D12)

If you wish to use the ESP32's GPIO0 pin - solder the jumper on the back of the FeatherWing, highlighted in red.

Then, include the following code to use the pin:

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esp32_gpio0 = DigitalInOut(board.D10)

CircuitPython Usage

Copy the following code to your code.py file on your microcontroller:

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import board
import busio
from digitalio import DigitalInOut

from adafruit_esp32spi import adafruit_esp32spi
import adafruit_esp32spi.adafruit_esp32spi_requests as requests

print("ESP32 SPI hardware test")

esp32_cs = DigitalInOut(board.D13)
esp32_ready = DigitalInOut(board.D11)
esp32_reset = DigitalInOut(board.D12)

spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)

if esp.status == adafruit_esp32spi.WL_IDLE_STATUS:
    print("ESP32 found and in idle mode")
print("Firmware vers.", esp.firmware_version)
print("MAC addr:", [hex(i) for i in esp.MAC_address])

for ap in esp.scan_networks():
    print("\t%s\t\tRSSI: %d" % (str(ap['ssid'], 'utf-8'), ap['rssi']))

print("Done!")

Connect to the serial monitor to see the output. It should look something like the following:

Make sure you see the same output! If you don't, check your wiring. Note that we've changed the pinout in the code example above to reflect the CircuitPython Microcontroller Pinout at the top of this page.

Once you've succeeded, continue onto the next page!

If you can read the Firmware and MAC address but fails on scanning SSIDs, check your power supply, you may be running out of juice to the ESP32 and it's resetting
This guide was first published on May 29, 2019. It was last updated on May 29, 2019. This page (CircuitPython) was last updated on Jul 16, 2019.