SKU: IOWC-1839
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Adafruit QT Py ESP32-S2 WiFi Dev Board w/ STEMMA QT

₹1,919.00 (Inclusive of all taxes)
Out of Stock

The Adafruit QT Py ESP32-S2 is a compact, feature-packed development board featuring a 240MHz ESP32-S2 SoC with native USB support, 4MB Flash, 2MB PSRAM, and a STEMMA QT connector for plug-and-play I2C sensor integration, programmable via Arduino IDE or CircuitPython.

Features

  • Powered by the ESP32-S2, a 240MHz single-core SoC with integrated 2.4GHz Wi-Fi and native USB for HID/MIDI/disk drive emulation.
  • Features 4MB of Flash memory and 2MB of PSRAM for buffering large data files and complex IoT application logic.
  • Includes a STEMMA QT connector for chainable, plug-and-play I2C connectivity to a vast ecosystem of sensors and actuators.
  • Compact form factor matches the Seeed Studio Xiao footprint, with 13 GPIOs, 10x 12-bit ADC, DAC, touch inputs, and hardware I2S/SPI/UART.
  • Optimized for low-power operation with light sleep at 2-4mA and deep sleep as low as ~70µA, supported by a 3.3V/600mA regulator.

Out of stock

Description

The Adafruit QT Py ESP32-S2 WiFi Dev Board packs the capabilities of Espressif’s ESP32-S2 into a miniature, developer-friendly footprint. Its 240MHz Xtensa single-core processor delivers robust computational performance for IoT edge processing, while the integrated native USB port opens advanced interfacing possibilities like acting as a keyboard, mouse, MIDI device, or mass storage drive without additional ICs. The board is engineered for efficient power management, supporting battery operation with protection circuitry and ultra-low deep sleep currents for long-term deployments.

Designed for rapid prototyping, the board features a dedicated STEMMA QT connector, standardizing I2C sensor hookups and eliminating soldering for compatible modules. Its generous 4MB Flash and 2MB PSRAM accommodate OTA updates, wireless stacks, and data-intensive applications like JSON parsing. The GPIO complement includes capacitive touch inputs, a hardware DAC, PWM on any pin, and high-speed SPI peripherals, making it suitable for HMI, audio, and sensor fusion projects. Compatible with both Arduino IDE and CircuitPython, it serves as a versatile platform for makers, educators, and IoT system integrators.

Key Features

  • Native USB support enables the board to function as a composite USB device (serial console, HID, MIDI, mass storage) for advanced PC peripherals and data logging.
  • STEMMA QT connector provides a solderless, polarized I2C interface for quickly daisy-chaining Qwiic-compatible sensors, displays, and actuators.
  • Substantial 2MB PSRAM allows for buffering large graphics, audio samples, or sensor datasets, enhancing performance for memory-intensive applications.
  • Integrated RGB NeoPixel LED with independent power control minimizes quiescent current during deep sleep, crucial for battery-powered nodes.
  • Five capacitive touch GPIOs enable the creation of touch-sensitive interfaces without external components, ideal for control panels and wearable devices.
  • Robust power management includes a 600mA peak 3.3V LDO regulator, protected battery input pads, and support for light/deep sleep modes.
  • Compact, Seeed Studio Xiao-compatible form factor (approx. 21x17.5mm) allows for integration into space-constrained enclosures and wearable projects.

Applications

  • Compact IoT sensor nodes for environmental monitoring, smart home automation, and data logging.
  • USB HID devices such as custom keyboards, macro pads, presentation remotes, and MIDI controllers.
  • Wearable tech and interactive projects leveraging capacitive touch inputs and low-power sleep modes.
  • Rapid prototyping with STEMMA QT/Qwiic ecosystem for education, maker workshops, and proof-of-concept builds.
  • Edge computing applications requiring local data processing, JSON parsing, and Wi-Fi connectivity.

Technical Specifications

Microcontroller / SoCESP32-S2 (Xtensa® single-core LX7, 240 MHz)
Wireless Protocol2.4 GHz Wi-Fi 802.11b/g/n
Memory4 MB Flash, 2 MB PSRAM
USB InterfaceUSB Type-C with Native USB Support
GPIO & I/O13x GPIO, 10x 12-bit ADC, 1x 8-bit DAC, 5x Capacitive Touch, PWM on any pin
Communication Interfaces2x I2C (one via STEMMA QT), Hardware UART, Hardware SPI, Hardware I2S
Supply Voltage5V via USB, 3.3V regulated output; Battery input (3.5V - 6V)
Operating CurrentLight Sleep: 2-4 mA; Deep Sleep: ~70 µA
Regulator Output3.3V, 600mA peak
On-board IndicatorsRGB NeoPixel LED
Programming/IDE SupportArduino IDE, CircuitPython, ESP-IDF
Dimensions (approx.)21 x 17.5 mm (Seeed Studio Xiao footprint)

Frequently Asked Questions

How do I program the QT Py ESP32-S2 using the Arduino IDE?

First, install the ESP32 board support via the Arduino Boards Manager using the ESP32 Arduino core repository URL. Select 'Adafruit QT Py ESP32-S2' from the board list. Connect via USB-C, choose the correct COM port, and upload your sketch. The native USB port provides serial communication, so no external USB-to-serial adapter is needed. Use the Boot button to enter download mode if the board doesn't auto-reset.

What is the purpose of the STEMMA QT connector and how is it used?

The STEMMA QT is a 4-pin, polarized JST SH connector that provides plug-and-play access to I2C (SDA, SCL) plus 3.3V and GND. It allows you to connect compatible sensors and displays without soldering, using matching STEMMA QT cables. You can daisy-chain multiple devices on the same bus. In code, use the Wire library to communicate with the connected I2C peripherals via the dedicated STEMMA QT port pins.

What are the power requirements and how do I run this board from a battery?

The board can be powered via the USB-C port (5V) or through the BAT+ and GND pads on the underside for a 3.5V to 6V DC input, such as a LiPo battery. An onboard diode protects against reverse polarity. The 3.3V regulator supplies the ESP32-S2 and GPIO. For lowest power, utilize deep sleep modes (~70µA) and disable the NeoPixel LED via its power control pin. Always measure your application's current draw to estimate battery life.

Package Includes

  • 1 x Adafruit QT Py ESP32-S2 WiFi Dev Board with STEMMA QT

Additional Information

Weight 0.005 kg
Dimensions 8 × 4 × 1 cm