let latestData = "waiting for data";

​

function setup() {

 createCanvas(windowWidth, windowHeight);

​

 serial = new p5.SerialPort();

​

 serial.list();

 serial.open('/dev/tty.usbmodem143101');

​

 serial.on('connected', serverConnected);

​

 serial.on('list', gotList);

​

 serial.on('data', gotData);

​

 serial.on('error', gotError);

​

 serial.on('open', gotOpen);

​

 serial.on('close', gotClose);

}

​

function serverConnected() {

 print("Connected to Server");

}

​

function gotList(thelist) {

 print("List of Serial Ports:");

​

 for (let i = 0; i < thelist.length; i++) {

  print(i + " " + thelist[i]);

 }

}

​

function gotOpen() {

 print("Serial Port is Open");

}

​

function gotClose(){

 print("Serial Port is Closed");

 latestData = "Serial Port is Closed";

}

​

function gotError(theerror) {

 print(theerror);

}

​

function gotData() {

 let currentString = serial.readLine();

  trim(currentString);

 if (!currentString) return;

 console.log(currentString);

 latestData = currentString;

}

​

function draw() {

 background(255,255,255);

 fill(0,0,0);

 text(latestData, 10, 10);

}