Adafruit QT Py ESP32-S3 WiFi Dev Board with STEMMA QT

Adafruit Industries, MIT

The ESP32-S3 has arrived in QT Py format - and what a great way to get started with this powerful new chip from Espressif! With dual 240 MHz cores, WiFi and BLE support, and native USB, this QT Py is great for powering your IoT projects.

USB-C port
USB-C connector used for powering and programming the QT Py ESP32-S3 board.
Type · powerVoltage · USB 5V input from a USB-C cable
3.3V
Output from the on-board 3.3V regulator. Adafruit states these pins can supply 600mA peak.
Type · powerVoltage · 3.3V regulated output
GND
Common ground for all power and logic on the board.
Type · powerVoltage · 0V ground reference
5V
5V output from the USB port. Adafruit also documents using the 5V pin as a protected external voltage input with a diode between the source and the pin.
Type · powerVoltage · 5V USB rail; external input only with diode protection per Adafruit guidance
BAT
Back-side battery input pad paired with GND for external battery packs.

Start wiring

Analog · I2C · UART · USB 5V input from a USB-C cable · 3.3V regulated output

Confirm the data interface matches your host board.

Module pins: USB-C port, 3.3V, GND, 5V, BAT, STEMMA QT 3.3V, STEMMA QT GND, A0. Schematik maps them to your board in the app.

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Position

Type

Function

Voltage

USB-C port

power

USB-C connector used for powering and programming the QT Py ESP32-S3 board.

USB 5V input from a USB-C cable

3.3V

power

Output from the on-board 3.3V regulator. Adafruit states these pins can supply 600mA peak.

3.3V regulated output

GND

power

Common ground for all power and logic on the board.

0V ground reference

power

5V output from the USB port. Adafruit also documents using the 5V pin as a protected external voltage input with a diode between the source and the pin.

5V USB rail; external input only with diode protection per Adafruit guidance

BAT

power

Back-side battery input pad paired with GND for external battery packs.

3V to 6V battery input per Adafruit pinouts page

analog

GPIO/analog input pad. Adafruit states A0 through A3 can be analog inputs.

analog

GPIO/analog input pad. Adafruit states A0 through A3 can be analog inputs.

analog

GPIO/analog input pad. Adafruit states A2 can also do capacitive touch.

analog

GPIO/analog input pad. Adafruit states A3 can also do capacitive touch.

SCL

signal

Main I2C clock pad. Adafruit notes this is not shared with the STEMMA QT connector and has no pull-up on the pin. Also supports capacitive touch and analog input.

SDA

signal

Main I2C data pad. Adafruit notes this is not shared with the STEMMA QT connector and has no pull-up on the pin. Also supports capacitive touch and analog input.

signal

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

signal

UART transmit pin. Connects to the receive pin on a sensor or breakout. Adafruit notes TX can also do capacitive touch.

SCK

signal

SPI clock pin on the ESP32-S3 high-speed peripheral.

signal

SPI microcontroller-in / sensor-out pin.

signal

SPI microcontroller-out / sensor-in pin.

STEMMA QT SCL1

signal

JST SH 4-pin STEMMA QT connector clock line. Adafruit states the connector breaks out a second I2C interface: SCL1, SDA1, 3.3V and GND.

3.3V logic on STEMMA QT connector

STEMMA QT SDA1

signal

JST SH 4-pin STEMMA QT connector data line. Adafruit states the connector breaks out a second I2C interface: SCL1, SDA1, 3.3V and GND.

3.3V logic on STEMMA QT connector

STEMMA QT 3.3V

power

3.3V rail on the JST SH STEMMA QT connector.

3.3V

STEMMA QT GND

power

Ground on the JST SH STEMMA QT connector.

0V ground reference

Boot button / GPIO 0

control

Boot/DFU button. Adafruit states it can put the board into ROM bootloader mode and can be read as GPIO 0 with input pull-up.

Reset button

control

Reset button restarts the board and helps enter the UF2 bootloader when tapped during the NeoPixel status LED boot indication.

Pinout

Start wiring

Connectors

Displays

Air quality

MCUs and boards