The really simple way is to buy an Arduino like the Arduino Micro that has an ATmega32U4 MCU. This chip has a native (built in) USB controller so it is simple to use Keyboard/Mouse commands.
The really simple way is to buy an Arduino like the Arduino Micro that has an ATmega32U4 MCU. This chip has a native (built in) USB controller so it is simple to use Keyboard/Mouse commands.