Adafruit AirLift – ESP32 WiFi Co-Processor Breakout Board
Give your plain ol' microcontroller project a lift with the Adafruit AirLift - a breakout board that lets you use the powerful ESP32 as a WiFi co-processor.
Pinout
- VIN
Power input for the AirLift ESP32 co-processor breakout. Adafruit Learn says use a 3.3V to 5VDC source capable of 250mA transmit spikes.
Type · PowerVoltage · 3.3V to 5VDC input - 3vo
Output from the onboard 3.3V regulator, usable for up to about 50mA for other devices.
Type · PowerVoltage · 3.3V output, about 50mA available - GND
Power and logic ground.
Type · GroundVoltage · 0V - SCK
SPI clock from the microcontroller to the AirLift, level shifted for 3V to 5V logic.
Type · SPIVoltage · 3V to 5V logic input - MISO
SPI data from the AirLift to the microcontroller. Adafruit Learn states this is 3.3V logic out and tri-stated when not selected.
Type · SPIVoltage · 3.3V logic output, readable by 3V to 5V logic - MOSI
SPI data from the microcontroller to the AirLift, level shifted for 3V to 5V logic.
Type · SPIVoltage · 3V to 5V logic input - CS
SPI chip-select from the microcontroller; also used to choose WiFi or BLE on reset.
Type · SPIVoltage · 3V to 5V logic input - BUSY
Required AirLift status output indicating readiness for more commands.
Type · SignalVoltage · 3.3V logic output, readable by 3V to 5V logic - !RESET
Reset input to the AirLift. Drive low to reset the ESP32 co-processor.
Type · SignalVoltage · 3V to 5V logic input - GP0
Optional ESP32 GPIO0 bootloading/data-ready signal, required for BLE mode according to Adafruit Learn.
Type · GPIOVoltage · 3.3V logic - RXI
Serial data input used for bootloading firmware and BLE-mode communication.
Type · SignalVoltage · 3.3V logic - TXO
Serial data output used for bootloading firmware and BLE-mode communication.
Type · SignalVoltage · 3.3V logic
| Pin | Type | Function | Voltage |
|---|---|---|---|
| VIN | Power | Power input for the AirLift ESP32 co-processor breakout. Adafruit Learn says use a 3.3V to 5VDC source capable of 250mA transmit spikes. | 3.3V to 5VDC input |
| 3vo | Power | Output from the onboard 3.3V regulator, usable for up to about 50mA for other devices. | 3.3V output, about 50mA available |
| GND | Ground | Power and logic ground. | 0V |
| SCK | SPI | SPI clock from the microcontroller to the AirLift, level shifted for 3V to 5V logic. | 3V to 5V logic input |
| MISO | SPI | SPI data from the AirLift to the microcontroller. Adafruit Learn states this is 3.3V logic out and tri-stated when not selected. | 3.3V logic output, readable by 3V to 5V logic |
| MOSI | SPI | SPI data from the microcontroller to the AirLift, level shifted for 3V to 5V logic. | 3V to 5V logic input |
| CS | SPI | SPI chip-select from the microcontroller; also used to choose WiFi or BLE on reset. | 3V to 5V logic input |
| BUSY | Signal | Required AirLift status output indicating readiness for more commands. | 3.3V logic output, readable by 3V to 5V logic |
| !RESET | Signal | Reset input to the AirLift. Drive low to reset the ESP32 co-processor. | 3V to 5V logic input |
| GP0 | GPIO | Optional ESP32 GPIO0 bootloading/data-ready signal, required for BLE mode according to Adafruit Learn. | 3.3V logic |
| RXI | Signal | Serial data input used for bootloading firmware and BLE-mode communication. | 3.3V logic |
| TXO | Signal | Serial data output used for bootloading firmware and BLE-mode communication. | 3.3V logic |
Pin details
12 connections- VIN
Power input for the AirLift ESP32 co-processor breakout. Adafruit Learn says use a 3.3V to 5VDC source capable of 250mA transmit spikes.
PowerVoltage · 3.3V to 5VDC input - 3vo
Output from the onboard 3.3V regulator, usable for up to about 50mA for other devices.
PowerVoltage · 3.3V output, about 50mA available - GND
Power and logic ground.
GroundVoltage · 0V - SCK
SPI clock from the microcontroller to the AirLift, level shifted for 3V to 5V logic.
SPIVoltage · 3V to 5V logic input - MISO
SPI data from the AirLift to the microcontroller. Adafruit Learn states this is 3.3V logic out and tri-stated when not selected.
SPIVoltage · 3.3V logic output, readable by 3V to 5V logic - MOSI
SPI data from the microcontroller to the AirLift, level shifted for 3V to 5V logic.
SPIVoltage · 3V to 5V logic input - CS
SPI chip-select from the microcontroller; also used to choose WiFi or BLE on reset.
SPIVoltage · 3V to 5V logic input - BUSY
Required AirLift status output indicating readiness for more commands.
SignalVoltage · 3.3V logic output, readable by 3V to 5V logic - !RESET
Reset input to the AirLift. Drive low to reset the ESP32 co-processor.
SignalVoltage · 3V to 5V logic input - GP0
Optional ESP32 GPIO0 bootloading/data-ready signal, required for BLE mode according to Adafruit Learn.
GPIOVoltage · 3.3V logic - RXI
Serial data input used for bootloading firmware and BLE-mode communication.
SignalVoltage · 3.3V logic - TXO
Serial data output used for bootloading firmware and BLE-mode communication.
SignalVoltage · 3.3V logic
Start wiring
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