Adafruit QT Py ESP32-S2 WiFi Dev Board with STEMMA QT
What has your favorite Espressif WiFi microcontroller, comes with our favorite connector - the STEMMA QT, a chainable I2C port, and has lots of Flash and RAM memory for your next IoT project? What will make your next IoT project flyyyyy? What a cutie pie! Or is it...
Pinout
- USB-C
USB-C port used for both powering and programming the board.
Type · power - 3.3V
Output from the 3.3V regulator.
Type · powerVoltage · 3.3 V output, Adafruit states 600 mA peak - GND
Common ground for all power and logic.
Type · groundVoltage · 0 V - 5V
5 V out from USB port; can also be used as voltage input with a diode as described by Adafruit.
Type · powerVoltage · 5 V - A0
Analog input on ADC2 and 8-bit DAC output; Adafruit notes A0 has a 10K pullup to 3.3 V.
Type · analogVoltage · ESP32-S2 ADC input, do not exceed 3.3 V / 3.6 V max directly - A1
Analog input on ADC2 and 8-bit DAC output.
Type · analogVoltage · ESP32-S2 ADC input, do not exceed 3.3 V / 3.6 V max directly - A2
Analog input on ADC1; can do capacitive touch.
Type · analogVoltage · ESP32-S2 ADC input, do not exceed 3.3 V / 3.6 V max directly - A3
Analog input on ADC1; can do capacitive touch.
Type · analogVoltage · ESP32-S2 ADC input, do not exceed 3.3 V / 3.6 V max directly - SCL
Main I2C clock pad; Adafruit lists SCL among capacitive-touch-capable pads.
Type · i2cVoltage · 3 V logic max for serial input per Adafruit QT Py ESP32-S2 pinout page - SDA
Main I2C data pad; Adafruit lists SDA among capacitive-touch-capable pads.
Type · i2cVoltage · 3 V logic max for serial input per Adafruit QT Py ESP32-S2 pinout page - RX
UART receive pin, connect to TX on sensor or breakout.
Type · uartVoltage · 3 V logic max for serial input per Adafruit QT Py ESP32-S2 pinout page - TX
UART transmit pin, connect to RX on sensor or breakout; can do capacitive touch.
Type · uartVoltage · 3 V logic max for serial input per Adafruit QT Py ESP32-S2 pinout page - SCK
SPI clock pin on ESP32-S2 high-speed peripheral.
Type · spiVoltage · 3 V logic max for serial input per Adafruit QT Py ESP32-S2 pinout page - MI
SPI microcontroller-in / sensor-out pin.
Type · spiVoltage · 3 V logic max for serial input per Adafruit QT Py ESP32-S2 pinout page - MO
SPI microcontroller-out / sensor-in pin.
Type · spiVoltage · 3 V logic max for serial input per Adafruit QT Py ESP32-S2 pinout page - STEMMA QT
JST SH 4-pin STEMMA QT connector breaks out a second I2C interface.
Type · i2cVoltage · SCL1, SDA1, 3.3 V, GND per Adafruit pinout page
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| USB-C | power | USB-C port used for both powering and programming the board. | ||
| 3.3V | power | Output from the 3.3V regulator. | 3.3 V output, Adafruit states 600 mA peak | |
| GND | ground | Common ground for all power and logic. | 0 V | |
| 5V | power | 5 V out from USB port; can also be used as voltage input with a diode as described by Adafruit. | 5 V | |
| A0 | analog | Analog input on ADC2 and 8-bit DAC output; Adafruit notes A0 has a 10K pullup to 3.3 V. | ESP32-S2 ADC input, do not exceed 3.3 V / 3.6 V max directly | |
| A1 | analog | Analog input on ADC2 and 8-bit DAC output. | ESP32-S2 ADC input, do not exceed 3.3 V / 3.6 V max directly | |
| A2 | analog | Analog input on ADC1; can do capacitive touch. | ESP32-S2 ADC input, do not exceed 3.3 V / 3.6 V max directly | |
| A3 | analog | Analog input on ADC1; can do capacitive touch. | ESP32-S2 ADC input, do not exceed 3.3 V / 3.6 V max directly | |
| SCL | i2c | Main I2C clock pad; Adafruit lists SCL among capacitive-touch-capable pads. | 3 V logic max for serial input per Adafruit QT Py ESP32-S2 pinout page | |
| SDA | i2c | Main I2C data pad; Adafruit lists SDA among capacitive-touch-capable pads. | 3 V logic max for serial input per Adafruit QT Py ESP32-S2 pinout page | |
| RX | uart | UART receive pin, connect to TX on sensor or breakout. | 3 V logic max for serial input per Adafruit QT Py ESP32-S2 pinout page | |
| TX | uart | UART transmit pin, connect to RX on sensor or breakout; can do capacitive touch. | 3 V logic max for serial input per Adafruit QT Py ESP32-S2 pinout page | |
| SCK | spi | SPI clock pin on ESP32-S2 high-speed peripheral. | 3 V logic max for serial input per Adafruit QT Py ESP32-S2 pinout page | |
| MI | spi | SPI microcontroller-in / sensor-out pin. | 3 V logic max for serial input per Adafruit QT Py ESP32-S2 pinout page | |
| MO | spi | SPI microcontroller-out / sensor-in pin. | 3 V logic max for serial input per Adafruit QT Py ESP32-S2 pinout page | |
| STEMMA QT | i2c | JST SH 4-pin STEMMA QT connector breaks out a second I2C interface. | SCL1, SDA1, 3.3 V, GND per Adafruit pinout page |
Start wiring
Analog · I2C · UART · 3.3 V output, Adafruit states 600 mA peak · 0 V
Confirm the data interface matches your host board.
Module pins: USB-C, 3.3V, 5V, GND, A0, A1, A2, A3. Schematik maps them to your board in the app.
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