This library provides high level functions for the Arduino, to ease communication with Picaso based modules when using the module configured for Serial. Please refer to the 4D Systems website, ...

Serial multiplexer for Arduino This library provides a simple way to create multiple virtual serial devices that communicate over one physical serial connection. A virtual device can be used as a drop ...

While the Arduino family of boards connect to your computer using a USB virtual serial port, the ATmega ones have an actual serial connection on-board.