Adafruit "My Little Hacker" ESP32-S2 Development Board

The Adafruit "My Little Hacker" is an ESP32-S2 development board designed for audio playback projects with Wi-Fi connectivity. It combines an ESP32-S2 module (Wi-Fi, 4 MB flash, 2 MB PSRAM) with a microSD card slot for storing audio files and an I2S amplifier that drives speakers up to 3 W — making it a self-contained audio player with wireless capabilities.

Powered by 2× AA batteries via an on-board boost converter (with automatic switchover to USB-C when connected), it's built for portable use. Five NeoPixel LEDs add colourful lighting effects, and a STEMMA QT port provides easy I2C expansion for sensors, displays, and other peripherals.

Key Features

• ESP32-S2 Module – Wi-Fi connectivity, 4 MB flash, 2 MB PSRAM
• I2S Audio Amplifier – Drives 4 or 8 Ω speakers up to 3 W
• MicroSD Card Slot – For storing audio files of any length
• 5× NeoPixel LEDs – Full-colour addressable lighting effects
• USB Type-C – For programming, debugging, and power
• Battery Powered – Boost converter runs from 2× AA batteries with USB-C switchover
• STEMMA QT Port – I2C connector for sensors, displays, and peripherals

Ideal For

• Wi-Fi connected audio players and sound effects boxes
• Portable music and notification devices
• Interactive props with lighting and sound
• IoT audio projects with sensor integration