var serial;
var portName = '/dev/cu.usbmodem14101';

var sensor1 = 0;
var sensor2 = 0;

function setup() {
  createCanvas(100, 600);

  serial = new p5.SerialPort();

  serial.on('connected', serverConnected);
  serial.on('open', portOpen);
  serial.on('error', serialError);
  serial.on('close', portClose);
  serial.open(portName);
}

function draw() {
  background('dodgerblue');
  noStroke();
  ellipse(width/2, height/2, sensor1, sensor2);
}

function mouseDragged(){
  var outputVal = Math.floor(map(mouseY, 0, height, 0, 255));
  print(outputVal);
  serial.write(outputVal);
}

function serverConnected(){
	console.log('connected to the server');
}

function portOpen(){
  console.log('the serial port opened!');
}

function serialError(err){
  console.log('something went wrong with the port. ' + err);
}

function portClose(){
  console.log('the port was closed');
}

function printList(portList) {
 for (var i = 0; i < portList.length; i++) {
 print(i + " " + portList[i]);
 }
}