// Activity 6 - Processing Code
// Demo of communicating between Arduino and Processing
import processing.serial.*; // include the serial management library
Serial myPort; // Create object from Serial class to connect to the Arduino
PFont f; // define a font object for text to be displayed on the screen
char val = ' '; // this variable will store the data sent from the Arduino
void setup() {
size (600, 600);// set to the width and height of your window
String portName = Serial.list()[2];// get the port Arduino connected to
myPort = new Serial(this, portName, 9600); //assign this port to variable
println(portName);// just confirm you got a valid port
f = createFont("Arial", 24); //assign the font you’ll use for the screen text

textFont(f); // set the current font
}
void draw() {
delay(100); // slow down the sketch a bit
background(0); // redraw black background
fill(255); // set colour to white
text("Click mouse to send 'blink' to Arduino", 100, 300); //screen text
// read data from the Arduino board
if (myPort.available()>0) { // if something came from Arduino
val = myPort.readChar(); // read the character
println(val); // print out the data you got from the Arduino
}
switch(val) { // based on the value received from Arduino
case '1': // if '1' sent from Arduino
fill(200, 0, 0); // draw a red circle
ellipse(100, 200, 50, 50);
break;
case '2'://if '2' sent from Arduino
fill(0, 200, 0); // draw a green circle
ellipse(300, 200, 50, 50);
break;
case '3'://if '3' sent from Arduino
fill(0, 0, 200);// draw a blue circle
ellipse(500, 200, 50, 50);
break;
default:
break;
}
}
void mousePressed() { // if the mouse is clicked
myPort.write('L'); // send signal to Arduino to flash LEDs
}