Heard about Arduino IDE-compatibles but not sure how to start? The Adafruit Metro is an ATmega328-based (like a lot of our own products) development board. Since it is shaped the same, and code/shield-compatible with the Arduino UNO R3 design, our Adafruit Metro is easy to use and hacker friendly and this is the perfect beginner kit for learning how to use the Adafruit Metro!