Arduino Micro is the smallest board of the family,
easy to integrate it in everyday objects to make them interactive.
The Micro is based on the ATmega32U4 microcontroller featuring
a built-in USB which makes the Micro recognisable as a mouse or keyboard.
The Micro is a microcontroller board based on the ATmega32U4 (datasheet),
developed in conjunction with Adafruit. It has 20 digital input/output pins
(of which 7 can be used as PWM outputs and 12 as analog inputs),
a 16 MHz crystal oscillator, a micro USB connection, an ICSP header,
and a reset button. It contains everything needed to support the microcontroller;
simply connect it to a computer with a micro USB cable to get started.
It has a form factor that enables it to be easily placed on a breadboard.
The Micro board is similar to the Arduino Leonardo in that
the ATmega32U4 has built-in USB communication,
eliminating the need for a secondary processor.
This allows the Micro to appear to a connected computer as a mouse and keyboard,
in addition to a virtual (CDC) serial / COM port.
t also has other implications for the behavior of the board;