let classifier;

  // Model URL

  let imageModelURL = 'https://teachablemachine.withgoogle.com/models/OtzSr9_AN/';

​

  // Video

  let video;

  let flippedVideo;

  // To store the classification

  let label = "";

​

  var serial; // variable to hold an instance of the serialport library

  var portName = '/dev/tty.usbmodem101'; // fill in your serial port name here

  // var portName = '/dev/tty.HC-05-DevB';

  var inData; // variable to hold the input data from Arduino

  var outByte = 0;

​

  // Load the model first

  function preload() {

    classifier = ml5.imageClassifier(imageModelURL + 'model.json');

  }

​

  function setup() {

    createCanvas(420, 460);

    // Create the video

    video = createCapture(VIDEO);

    video.size(320, 240);

    video.hide();

​

    flippedVideo = ml5.flipImage(video);

    // Start classifying

    classifyVideo();

​

​

    //set up communication port

    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

    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

    // numberResult(label);

  }

​

  function draw() {

    background(255);

    fill(0);

    text("incoming value: " + inData, 130, 360);

​

    // Draw the video

    image(flippedVideo, 0, 0);

​

    // Draw the label

​

    textSize(16);

    textAlign(CENTER);

    text(label, width / 3, height - 200);

​

​

​

  }

​

  // Get a prediction for the current video frame

  function classifyVideo() {

    flippedVideo = ml5.flipImage(video)

    classifier.classify(flippedVideo, gotResult);

    flippedVideo.remove();

​

  }

​

  // When we get a result

  function gotResult(error, results) {

    // If there is an error

    if (error) {

      console.error(error);

      return;

    }

    // The results are in an array ordered by confidence.

    console.log(results[0]);

    label = results[0].label;

    numberResult(label);

    // Classifiy again!

    classifyVideo();

  }

​

  function numberResult(label) {

    switch (label) {

      case "Waving":

        outByte = 1;

        serial.write(outByte);

        //console.log(outByte);

        break;

      case "1 Finger":

        outByte = 2;

        serial.write(outByte);

        //console.log(outByte);

        break;

      case "2 Fingers":

        outByte = 3;

        serial.write(outByte);

        //console.log(outByte);

        break;

      case "3 Fingers":

        outByte = 4;

        serial.write(outByte);

        //console.log(outByte);

        break;

      case "4 Fingers":

        outByte = 5;

        serial.write(outByte);

        //console.log(outByte);

        break;

      case "Fist/No Fingers":

        outByte = 6;

        serial.write(outByte);

        //console.log(outByte);

        break;

      case "No Hand Detected":

        outByte = 7;

        serial.write(outByte);

        //console.log(outByte);

        break;

    }

  }

​

  // Following functions print the serial communication status to the console for debugging purposes

​

  function printList(portList) {

    // portList is an array of serial port names

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

      // Display the list the console:

      print(i + " " + portList[i]);

    }

  }

​

  function serverConnected() {

    print('connected to server.');

  }

​

  function portOpen() {

    print('the serial port opened.')

  }

​

  function serialEvent() {

    inData = Number(serial.read());

  }

​

  function serialError(err) {

    print('Something went wrong with the serial port. ' + err);

  }

​

  function portClose() {

    print('The serial port closed.');

  }

​

  // function mouseDragged() {

  //   // map the mouseY to a range from 0 to 255:

  //   outByte = int(map(mouseY, 0, height, 0, 255));

  //   // send it out the serial port:

  //   serial.write(outByte);

  //}

​

  function keyTyped() {

    if (key == 'a') {

      outByte = 0;

      serial.write(outByte);

      console.log(outByte);

    } else {

      outByte = 1;

      serial.write(outByte);

      console.log(outByte);

    }

   }