// Example by Tom Igoe 
 
import processing.serial.*; 
 
int lf = 10;    // Linefeed in ASCII 
String myString = null; 
Serial myPort;  // The serial port 
 
void setup() { 
  // List all the available serial ports 
  println(Serial.list()); 
  // I know that the first port in the serial list on my mac 
  // is always my  Keyspan adaptor, so I open Serial.list()[0]. 
  // Open whatever port is the one you're using. 
  myPort = new Serial(this, Serial.list()[0], 9600); 
  myPort.clear(); 
  // Throw out the first reading, in case we started reading 
  // in the middle of a string from the sender. 
  myString = myPort.readStringUntil(lf); 
  myString = null; 
} 
 
void draw() { 
  while (myPort.available() > 0) { 
    myString = myPort.readStringUntil(lf); 
    if (myString != null) { 
      println(myString); 
    } 
  } 
}