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.
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.
Power input for the AirLift ESP32 co-processor breakout. Adafruit Learn says use a 3.3V to 5VDC source capable of 250mA transmit spikes.
Output from the onboard 3.3V regulator, usable for up to about 50mA for other devices.
Power and logic ground.
SPI clock from the microcontroller to the AirLift, level shifted for 3V to 5V logic.
SPI data from the AirLift to the microcontroller. Adafruit Learn states this is 3.3V logic out and tri-stated when not selected.
SPI data from the microcontroller to the AirLift, level shifted for 3V to 5V logic.
SPI chip-select from the microcontroller; also used to choose WiFi or BLE on reset.
Required AirLift status output indicating readiness for more commands.
Reset input to the AirLift. Drive low to reset the ESP32 co-processor.
Optional ESP32 GPIO0 bootloading/data-ready signal, required for BLE mode according to Adafruit Learn.
Serial data input used for bootloading firmware and BLE-mode communication.
Serial data output used for bootloading firmware and BLE-mode communication.
| Pin | Position | 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 | signal | SPI clock from the microcontroller to the AirLift, level shifted for 3V to 5V logic. | 3V to 5V logic input | |
| MISO | signal | 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 | signal | SPI data from the microcontroller to the AirLift, level shifted for 3V to 5V logic. | 3V to 5V logic input | |
| CS | signal | 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 | signal | 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 |
SPI · UART · Ethernet · 3.3 – 5 V · Breakout
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