A GPS unit and a Bluetooth-to-serial were tying up all the hardware UARTs on an AVR Arduino project ... IDs and assigns each a virtual serial port. While this was a hack born of necessity ...

However, it does require a quick patch to the Arduino library to make it work. Just gaining access to the additional UARTs isn’t hard. You simply use one of the additional serial port objects ...

Arduino enthusiasts searching for an isolated USB to UART converter specifically designed for the Arduino Pro mini may be interested in a new piece of hardware created by Simone based in Italy.

The need for a second UART port ( and one that is not shared with USB) on the Arduino Uno is so great that the “SoftwareSerial” library in included in the Arduino IDE. It emulates additional ...