Processin com Arduino

integracao

import java.*;
import java.io.*;
import processing.serial.*; //Cria o canal de comunicação com o Arduino
import cc.arduino.*; //Libs Arduino


Arduino arduino;
int ledPin;

void setup()
{
  
    arduino = new Arduino(this, Arduino.list()[1]);  
 
  ledPin= readData("C://dt.txt"); 
  arduino.pinMode(ledPin, Arduino.OUTPUT); 
   
}

int readData(String myFileName){
  
  File file=new File(myFileName);
  StringBuffer contents = new StringBuffer(); 
  BufferedReader br=null;
  int retorno=0;
  
  try{
    br=new BufferedReader(new FileReader(file));
    String text=null;
    
    while((text=br.readLine())!=null){
      String [] subtext = splitTokens(text,",");
     retorno = int(subtext[0]);
     return retorno;
      
      
      
    }
  }catch(FileNotFoundException e){
    e.printStackTrace();
  }catch(IOException e){
    e.printStackTrace();
  }finally{
    try {
      if (br != null){
        br.close();
      }
    } catch (IOException e) {
      e.printStackTrace();
    }
  } 
   return retorno;
}

 
void draw()
{
    arduino.digitalWrite(ledPin, Arduino.HIGH);
    delay(1000);
    arduino.digitalWrite(ledPin, Arduino.LOW);
    delay(1000);
}