var portName = '/dev/cu.thisWontWorkEver';  // fill in your serial port name here

var portTest = "fruit"; //This string is what I will look for in the port list to find the one I want. When I used the Adafruit BT module "fruit" was the easy unique identifier. The FTDI chip shoes up as "usbserial" and regular arduinos as "usbmodem"

var logSerial = true; //since the console is slow-ish in p5, once I see serial data comes in I stop logging it there. 

var lastSerialString = ""; //however, it is useful to keep the last serial string and maybe show that in the front end; not slow, and helpful for seeing that the app is getting data

var rValue, gValue; //globals for the red and green LED PWM ammount. 

var s1, s2, s3, ldr; //Globals to save the 3 switch states and the photocell ("light dependent resistor") reported from the arduino 

var state = "neutral"; //Should I show the good picture, bad picture, or nothing. 

var goodImage, badImage; //the good and bad pics.

​

​

function setup() {

  createCanvas(640, 480);

  background(0x08, 0x16, 0x40);

  //everything here is the same as class 6

  serial = new p5.SerialPort();       // make a new instance of the serialport library

  serial.on('list', printList);  // set a callback function for the serialport list event NOTE: I like to chain open from list, so I can decide which port is the arduino

  serial.on('connected', serverConnected); // callback for connecting to the server

  serial.on('open', portOpen);        // callback for the port opening

  serial.on('data', serialEvent);     // callback for when new data arrives

  serial.on('error', serialError);    // callback for errors

  serial.on('close', portClose);      // callback for the port closing

​

  //serial.list();                      // list the serial ports

  //serial.open(portName);              // open a serial port

  badImage = loadImage("bad.jpg");

  goodImage = loadImage("good.jpg");

}

​

// get the list of ports:

function printList(portList) {

  // portList is an array of serial port names

  for (var i = 0; i < portList.length; i++) {

    // Display the list the console:

    println(i + " " + portList[i]);

    if (portList[i].indexOf(portTest) != -1) { //indexOf gives the starting position of a substring within a longer string, and returns -1 if not found.

      portName = portList[i];

      console.log("Will attempt to open Arduino on " + portName + " for serial connection");

    }

  }

  serial.open(portName); //NOTE: here is my open command.

}

​

​

//This is very similar to class 6. Get a line, split on the commas, and save the separate results. 

function serialEvent() {

  //console.log(".");

  var inData = serial.readLine();

  if (inData.length>0) {

    lastSerialString = inData;

    var temp = inData.trim().split(',');

    if (temp.length==4) { //This line effectively filters out the sensor-reporting strings from all the other things the Arduino is writing to the serial port for debugging. Unless those lines happened to have four commas, we're good.

      s1 = temp[0];

      s2 = temp[1];

      s3 = temp[2];

      ldr = temp[3];

    }

  }

}

​

function draw() {

  background(200);

    if (state=="bad") { //yikes!

    image(badImage, 0,0);

  } else if (state=="good") { //aww...

    image(goodImage, -200, 0);

  } else { //draw the primitive "gui"

    textSize(32);

    fill(0);

    text(lastSerialString, 50, 50); //see what the last message from the Arduino was

​

    //represent LEDs as circles colored in depending on their PWM value

    stroke(0);

    fill(rValue, 0, 0);

    ellipse(100, 300, 50, 50);

    fill(0, gValue, 0);

    ellipse(200, 300, 50, 50);

​

    //represent switches:

    fill(0);

    rect(50, 100, 30, 50+20*s1);

    rect(150, 100, 30, 50+20*s2);

    rect(250, 100, 30, 50+20*s3);

​

    //make a pretty circle for the LDR:

    stroke(255, 0, 255);

    fill(255, 0, 255, 120);

    ellipse(350, 100, 20+ldr/10, 20+ldr/10);

  } 

}

​

//If we click, calculate red and green PWM ammounts proportional to the mouse X and YH position. 

function mousePressed() {

  rValue = int(map(mouseX, 10, width-10, 0, 255));

  gValue = int(map(mouseY, 10, height-10, 0, 255));

  gValue = constrain(gValue, 0, 255);

  rValue = constrain(rValue, 0, 255);

  serial.write("L:" + rValue + "," + gValue + "\r\n"); //Note the \r\n. On the p5 side we need both to trigger readLine(). So although the Arduino might not need, I decided to use both so that everything is the same both ways.

  //serial.write("!"); //originally, I just sent one character out when the mouse was pressed, to test my setup with the echo serial function on the arduino side. 

}

​

function keyPressed() {

  console.log(key);

  //If we get a number key, generate tone commands with different pitches:

  if (key>=0 && key<=9) {

    serial.write("T:" + key*40 + "\r\n");

  }

}

​

//Trigger the "good" and "bad" functions:

function keyTyped() {

  if (key=='g') good();

  if (key=='b') bad(); 

}

​

//Using the L: and T: commands we've established, trigger the Arduino to flash a green light and play a happy beep while the picture of the kitten is on the wcreen

function good() {

  console.log("Doing good");

  state="good";

  serial.write("L:0,255\r\n");

  serial.write("T:2000\r\n");

  setTimeout(function() { //setTimeout makes it easy to defer calling some things to the future.

    serial.write("T:2500\r\n");

  }, 200); 

  setTimeout(function() {

    serial.write("T:0\r\n");

    serial.write("L:0,0\r\n");

    state="neutral";

  }, 1000); 

}

​

//for the bad function, play a nasty sound with the red light while Zombie MJ creeps around. 

function bad() {

  console.log("Doing BAD");

  state="bad";

  serial.write("L:255,0\r\n");

  serial.write("T:14\r\n");

  setTimeout(function() {

    serial.write("T:16\r\n");

  }, 200); 

  setTimeout(function() {

    serial.write("T:0\r\n");

    serial.write("L:0,0\r\n");

    state="neutral";

  }, 1000); 

}

​

//These were also functions I used during testing.

//function mousePressed() {

  //serial.write("255,128\r\n");

  // serial.write(13);

  // serial.write(10);

//}

​

function serialError(err) { println('Something went wrong with the serial port. ' + err); }

function portClose() { println('The serial port closed.'); }

function serverConnected() { println('connected to server.'); }

function portOpen() { println('the serial port opened.'); }

​

​

//end

​