Adafruit QT Py ESP32-S2 WiFi Dev Board with STEMMA QT

by Adafruit

This diminutive dev board comes with one of our new favorite lil chips, the ESP32-S2!

The ESP32-S2 is a highly-integrated, low-power, 2.4 GHz Wi-Fi System-on-Chip (SoC) solution that now has built-in native USB as well as some other interesting new technologies like Time of Flight distance measurements. With its state-of-the-art power and RF performance, this SoC is an ideal choice for a wide variety of application scenarios relating to the Internet of Things (IoT), wearable electronics, and smart homes.

Please note the QT Py ESP32-S2 has a single-core 240 MHz chip, so it won't be as fast as ESP32's with dual-core. Also, there is no Bluetooth support. However, we are super excited about the ESP32-S2's native USB which unlocks a lot of capabilities for advanced interfacing! This ESP32-S2 mini-module used on the QT Py comes with 4 MB flash and 2 MB PSRAM so you can buffer massive JSON files for parsing!

OLEDs! Inertial Measurement Units! Sensors a-plenty. All plug-and-play thanks to the innovative chainable design: SparkFun Qwiic-compatible STEMMA QT connectors for the I2C bus so you don't even need to solder! Just plug in a compatible cable and attach it to your MCU of choice, and youโ€™re ready to load up some software and measure some light.

Pinout and shape are Seeed Xiao compatible, with castellated pads so you can solder it flat to a PCB. In addition to the QT connector, Adafruit also added an RGB NeoPixel (with controllable power pin to allow for ultra-low-power usage), a reset button (great for restarting your program or entering the bootloader) and a button on GPIO 0 for entering the ROM bootloader or for user input

Runs Arduino like a dream, and CircuitPython projects are fantastically fun.

  • Same size, form-factor, and pin-out as Seeed Xiao
  • USB Type C connector
  • ESP32-S2 240MHz Tensilica processor - the next generation of ESP32, now with native USB so it can act like a keyboard/mouse, MIDI device, disk drive, etc!
  • 4 MB Flash & 2 MB PSRAM
  • Native USB supported by every OS - can be used in Arduino or CircuitPython as USB serial console, MIDI, Keyboard/Mouse HID, even a little disk drive for storing Python scripts.
  • Can be used with Arduino IDE or CircuitPython
  • Built-in RGB NeoPixel LED with power control to reduce quiescent power in deep sleep
  • Battery input pads on underside with diode protection for external battery packs up to 6V input
  • 13 GPIO pins:
    • 11 on breakout pads, 2 more on QT connector
    • 10 x 12-bit analog inputs (SPI high speed pads do not have analog inputs)
    • 8-bit analog output DAC
    • PWM outputs on any pin
    • Two I2C ports, one on the breakout pads, and another with STEMMA QT plug-n-play connector
    • Hardware UART
    • Hardware SPI on the high speed SPI peripheral puns
    • Hardware I2S on any pins
    • 5 x Capacitive Touch with no additional components required
  • 3.3V regulator with 600mA peak output
  • Deep sleep at 100uA
  • Reset switch for starting your project code over, boot 0 button for entering bootloader mode
  • Really really small

Technical Details

Revision History:

  • Before Feb 28, 2022 - Please note there is a hardware bug in the current revision of the PCB that causes deep sleep to draw ~6mA,
  • As of Monday, February 28th, 2022, the onboard antenna has been rotated to give a better response. Adafruit have also fixed low power sleep mode, so deep sleep can get down to 70uA

Product Dimensions: 21.8mm x 17.9mm x 5.7mm / 0.9" x 0.7" x 0.2"

Product Weight: 2.1g / 0.1oz