Yún – How to add a serial port
The ATmega32u4 microcontroller, used on the Arduino Yun, has a serial port (PIN 0 and 1) connected internally to the AR9331 chip that runs the Linux distribution Linino: As the Arduino Leonardo, also Arduino Yun emulates a serial port through an USB connection (micro USB connector). Sometimes it’s needed to have a physical serial port, for example to…