Implementation of the SelfStudy application. It helps you to understand how the node sends and receives the message through the TinyOS platform.

Whenever the sender node sends a radio message, this node will turn on the RED led;

Whenever the receiver node receives a radio mesage, this node will turn on the GREEN led. Program two motes with this application.  As long as they are both within range of each other, the LEDs on both will be on.