In order, the example code...
Initializes the ESP32 over SPI using the SPI port and 3 control pins:
esp32_cs = DigitalInOut(board.ESP_CS)
esp32_ready = DigitalInOut(board.ESP_BUSY)
esp32_reset = DigitalInOut(board.ESP_RESET)
spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)
Tells our requests library the type of socket we're using (socket type varies by connectivity type - we'll be
using the adafruit_esp32spi_socket for this example). We'll also set the interface to an esp object. This is a
little bit of a hack, but it lets us use requests like CPython does.
requests.set_socket(socket, esp)
Verifies an ESP32 is found, checks the firmware and MAC address
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])
Performs a scan of all access points it can see and prints out the name and signal strength:
© Adafruit Industries https://learn.adafruit.com/adafruit-airlift-shield-esp32-wifi-co-processor Page 27 of 56
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