Adafruit ESP32-S2 Feather - 4MB Flash + 2MB PSRAM

USB-C
USB-C port used for powering and programming; charges the LiPoly battery when USB is plugged in.
Type · powerVoltage · USB 5V input
LiPoly JST 2-PH
Battery connector for a 250 mAh or larger 3.7/4.2 V LiPoly battery; can power the Feather and charge from USB.
Type · powerVoltage · 3.7/4.2V LiPoly
GND
Common ground for all power and logic.
Type · groundVoltage · 0V
BAT
Positive voltage to/from the 2-pin JST jack for the optional LiPoly battery.
Type · powerVoltage · Battery voltage
USB
Positive voltage to/from the USB-C jack when USB is connected.
Type · powerVoltage · USB voltage

ESP32

110 other options

Wi-Fi and Bluetooth on a single chip, in every shape from Espressif DevKitC to Adafruit Feathers with STEMMA QT, DFRobot FireBeetles tuned for battery life, and Seeed XIAOs under a thumbnail.

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ESP32-C3 Super Mini visual preview
ESP32-C3 Super Mini

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Position

Type

Function

Voltage

USB-C

power

USB-C port used for powering and programming; charges the LiPoly battery when USB is plugged in.

USB 5V input

LiPoly JST 2-PH

power

Battery connector for a 250 mAh or larger 3.7/4.2 V LiPoly battery; can power the Feather and charge from USB.

3.7/4.2V LiPoly

GND

ground

Common ground for all power and logic.

BAT

power

Positive voltage to/from the 2-pin JST jack for the optional LiPoly battery.

Battery voltage

USB

power

Positive voltage to/from the USB-C jack when USB is connected.

USB voltage

control

3.3 V regulator enable; pulled up, connect to ground to disable the regulator.

3.3V logic

3.3V

power

Output from the 3.3 V regulator; Adafruit states it can supply 500 mA peak.

3.3V output, 500mA peak

SCK

spi

SPI clock pin on the ESP32-S2 high-speed peripheral.

3.3V logic

MOSI

spi

SPI microcontroller-out / sensor-in data pin.

3.3V logic

MISO

spi

SPI microcontroller-in / sensor-out data pin.

3.3V logic

uart

UART receive pin; connect to the transmit pin on a sensor or breakout.

3.3V logic

uart

UART transmit pin; connect to the receive pin on a sensor or breakout.

3.3V logic

SCL

i2c

I2C clock pin shared with the STEMMA QT connector; Adafruit states there is a 5 kΩ pull-up on this pin.

3.3V logic

SDA

i2c

I2C data pin shared with the STEMMA QT connector; Adafruit states there is a 5 kΩ pull-up on this pin.

3.3V logic

I2C_POWER

control

Power-control pin that must be pulled high for the STEMMA QT connector and onboard BME280, if present, to work; handled automatically by CircuitPython/Arduino.

3.3V logic

analog

Analogue input and one of the two DAC output pins on ADC2.

3.3V logic/analogue

analog

Analogue input and one of the two DAC output pins on ADC2.

3.3V logic/analogue

A2-A4

analog

Analogue input pins on ADC2.

3.3V logic/analogue

analog

Analogue input pin on ADC1.

3.3V logic/analogue

D5-D6, D9-D13

gpio

Digital GPIO pins; Adafruit notes D5, D6, D9 and D10 are on ADC1, while D11-D13 are on ADC2.

3.3V logic

RST

reset

Reset pin; tie to ground manually to reset the board.

3.3V logic

BOOT / GPIO0

control

Boot/DFU button input available as board.BUTTON in CircuitPython and pin 0 in Arduino; used with reset for ROM bootloader mode.

3.3V logic

Debug TX / DB

uart

Hardware UART debug transmit pin for low-level ESP32-IDF debug output, not the default Serial/CircuitPython print output.

3.3V logic

Pinout

Arduino

Add-ons

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