adafruit-qt-py-esp32-s2

Important Note

This entire repo was AI created - including all of the data within. The intent was to A) help me with my personal electronics inventory; and B) see how I could use AI to make that process a bit easier. DO NOT TRUST!

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

Details

• Location: Cabinet-1, Bin 26
• Category: Microcontroller Boards
• Type: WiFi Development Board with STEMMA QT
• Microcontroller: ESP32-S2
• Brand: Adafruit
• Part Number: 5325
• Quantity: 10
• Product URL: https://www.adafruit.com/product/5325

Description

The cutest ESP32-S2 development board! This diminutive dev board features the ESP32-S2 with built-in native USB, WiFi connectivity, and STEMMA QT connector for easy sensor integration. Compatible with Seeed Xiao form factor with castellated pads for direct PCB mounting.

Specifications

• Part Number: 5325
• Microcontroller: ESP32-S2 (single-core)
• Architecture: Xtensa LX7 32-bit
• Clock Speed: 240MHz
• Operating Voltage: 3.3V
• Flash Memory: 4MB
• PSRAM: 2MB
• Dimensions: 21.8mm x 17.9mm x 5.7mm
• Weight: 2.1g

Image

Features

• Native USB: Built-in USB support - can act as keyboard/mouse, MIDI device, disk drive
• WiFi Connectivity: 2.4 GHz Wi-Fi 802.11 b/g/n
• STEMMA QT Connector: Plug-and-play I2C sensor connectivity
• USB-C Connector: Modern connector for programming and power
• RGB NeoPixel: Built-in addressable LED with power control
• Xiao Compatible: Same pinout and form factor as Seeed Xiao
• Castellated Pads: Can be soldered directly to PCB
• Reset & Boot Buttons: Easy programming and debugging

Pin Configuration

• Digital I/O: 13 GPIO pins (11 on breakout, 2 on QT connector)
• Analog Inputs: 10 pins (12-bit ADC)
• Analog Output: 1 pin (8-bit DAC)
• PWM: Available on any pin
• I2C: Two ports (breakout pads + STEMMA QT)
• SPI: Hardware SPI on high-speed peripheral pins
• UART: Hardware UART
• I2S: Hardware I2S on any pins
• Capacitive Touch: 5 pins with no additional components

Power Specifications

• Operating Voltage: 3.3V
• Input Voltage: 5V (USB-C) or up to 6V (battery pads)
• Regulator: 3.3V with 600mA peak output
• Current Consumption:
  • Light sleep: 2-4mA
  • Deep sleep: ~70µA (hardware rev C)
• Battery Support: Underside pads with diode protection

Applications

• IoT sensor nodes with WiFi connectivity
• USB HID devices (keyboard, mouse, MIDI)
• Wearable electronics projects
• STEMMA QT sensor networks
• CircuitPython projects
• Arduino WiFi projects
• Portable data loggers
• Smart home controllers

Programming

• Arduino IDE: Full support with ESP32 board package
• CircuitPython: Native support with USB drive functionality
• ESP-IDF: Espressif development framework
• USB Programming: No external programmer needed
• Libraries: WiFi, HTTP, MQTT, sensor libraries

STEMMA QT Ecosystem

• Plug-and-Play: No soldering required for I2C sensors
• Chainable: Multiple sensors can be daisy-chained
• Compatible: Works with SparkFun Qwiic and Seeed Grove I2C
• Extensive: Large ecosystem of compatible sensors and displays

Advantages

• Native USB: Advanced USB functionality built-in
• Compact Size: Tiny form factor for space-constrained projects
• Easy Connectivity: STEMMA QT eliminates wiring complexity
• Dual Programming: Arduino IDE and CircuitPython support
• Low Power: Excellent for battery-powered applications
• WiFi Built-in: No additional modules needed for connectivity

Hardware Revisions

• Rev B (before Feb 28, 2022): Deep sleep draws ~6mA (hardware bug)
• Rev C (after Feb 28, 2022): Fixed deep sleep (~70µA), improved antenna

Notes

• Single-core ESP32-S2 (not dual-core like ESP32)
• No Bluetooth support (WiFi only)
• Native USB unlocks advanced interfacing capabilities
• 4MB Flash + 2MB PSRAM allows for complex applications
• Perfect for IoT projects requiring WiFi connectivity
• STEMMA QT connector makes sensor integration effortless
• Compatible with Xiao ecosystem accessories

Tags

microcontroller, esp32-s2, wifi, qt-py, stemma-qt, usb-c, adafruit, iot, circuitpython