== Mote-PC Serial Communication ==

The basic abstraction for mote-PC communication is a '' packet source ''. A packet source is a communication medium over which an application can receive packets from and send packets to a mote. 
Examples of packet sources include serial ports, TCP sockets, and the SerialForwarder tool. Most TinyOS communication tools take an optional -comm parameter, which allows you to specify the packet source as a string. For example: 

{{{

node1-2:~# java net.tinyos.tools.Listen -comm serial@/dev/ttyUSB0:telosb

}}}

tells Listen tool to use the serial port /dev/ttyUSB0 at the correct speed for a telosb mote.