Using AT commands + serial port to control mobile phone from processing

import processing.serial.*;

Serial mobilePort;

void setup(){
println(Serial.list());
 mobilePort=new Serial(this, Serial.list()[9], 9600);  
 size(400, 400);
}

void draw(){
  // Expand array size to the number of bytes you expect
  byte[] inBuffer = new byte[7];
  while (mobilePort.available() > 0) {
    inBuffer = mobilePort.readBytes();
    mobilePort.readBytes(inBuffer);
    if (inBuffer != null) {
      String myString = new String(inBuffer);
      println(myString);
    }
  }
  
}

void mousePressed(){
  //make phone calls
  //mobilePort.write("ATD+1878200;");
 // mobilePort.write("\n\r");

 //Anser phone call
 mobilePort.write("ATA;");
 mobilePort.write("\n\r");
}