Adafruit AirLift Shield ESP32 User Manual

# tx=board.TX,
# rx=board.RX,
# )
adapter = esp32.start_bluetooth()
ble = BLERadio(adapter)
uart = UARTService()
advertisement = ProvideServicesAdvertisement(uart)
while True:
ble.start_advertising(advertisement)
print("waiting to connect")
while not ble.connected:
pass
print("connected: trying to read input")
while ble.connected:
# Returns b'' if nothing was read.
one_byte = uart.read(1)
if one_byte:
print(one_byte)
uart.write(one_byte)
Talk to the AirLift via the Bluefruit LE Connect App
Start the Bluefruit LE Connect App on your phone or tablet. You should see a CIRCUITPY device available
to connect to. Tap the Connect button (1):
You'll then see a list of Bluefruit Connect functions ("modules"). Choose the UART module (2):
© Adafruit Industries https://learn.adafruit.com/adafruit-airlift-shield-esp32-wifi-co-processor Page 38 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)