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

What's Feather-shaped and has an ESP32-S2 WiFi module? What has a STEMMA QT connector for I2C devices? What has your favorite Espressif WiFi microcontroller and lots of Flash and RAM memory for your next IoT project? What will make your next IoT project flyyyyy?

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

Start wiring

SPI · UART · I2C · USB 5V input · 3.7/4.2V LiPoly

Confirm the data interface matches your host board.

Module pins: USB-C, LiPoly JST 2-PH, BAT, USB, 3.3V, GND, SCK, MOSI. Schematik maps them to your board in the app.

Related groups

4 groups

Connectors

Sort passive connector adapters from Qwiic boards, LCD modules and microSD card adapters before assuming anything with the right plug will substitute safely.

Connectors & cables · Connectors · 28 parts

Displays

Character LCDs, SPI TFTs, e-paper modules and larger capacitive-touch TFT panels solve different display jobs. Treat display class, interface, controller, resolution, touch, refresh behaviour, storage, voltage and mounting as separate swap checks.

Displays · TFT & LCD displays · 35 parts

Air quality

Choose between MQ gas sensors, VOC/eCO2 indoor-air sensors, true CO2 modules and particulate sensors without treating every air-quality breakout as the same detector.

Sensors · Gas & air-quality sensors · 31 parts

MCUs and boards

ESP32, Arduino Uno, Raspberry Pi Pico, and compatible add-on boards for running builds.

Boards · Microcontroller boards · 25 parts

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

Start wiring

Connectors

Displays

Air quality

MCUs and boards