Useful External Material
------------------------

Mono serial port example >> http://playground.arduino.cc/Interfacing/Mono

Arduino and Visual C# - Control Arduino with Windows Forms Application >> https://www.youtube.com/watch?v=WShhcGl3A6g&list=PLfpDAUL7P6g-u66ktrecpDGBqODGXkrOv

SerialPort sp = new SerialPort("COM3", 9600); >> http://answers.unity3d.com/questions/1069326/sending-data-from-arduino-uno-to-unity.html
http://answers.unity3d.com/questions/1071273/how-to-save-serial-port-data-to-a-variable.html

http://answers.unity3d.com/topics/serialport.html

*http://answers.unity3d.com/questions/1103075/i-need-to-connect-arduino-and-android-device-via-u.html
*https://github.com/abstractmachine/UnitySerialPort/blob/master/Assets/Serial.cs

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Scratch Pad
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USD Port On Android:
/dev/bus/usb/003/002
/dev/bus/usb/001/002