import processing.serial.*;
Serial inputPort;

String input = "";


void setup() {
  size(500, 500); 
 //Just shows all the serial connections in case other devices show up
  for(int i=0; i < Serial.list().length; i++) println(i + " " + Serial.list()[i]);
  
  //                                   [2] usually works, but sometimes you need a different number
  //                                             -> check the list in the debugger
  String port = Serial.list()[2];
  inputPort = new Serial(this, port, 9600);

}


void draw() {
  fill(0);
  rect(0, 0, width, height);


  fill(255);
  text("Current Input: " + input, 100, 100);

  if (inputPort == null) text("NO CONNECTION", 100, 80);
  else text("CONNECTED", 100, 80);
}







void serialEvent(Serial p) {
  String result = "";
  String temp = "";


  if (inputPort.available() > 0) {
    temp = inputPort.readStringUntil('\n');
    if (temp != null) result = trim(temp);
  }
  input = result;
}