const serial = new p5.WebSerial();

​

// HTML button object:

let portButton;

let inData = 0; // for incoming serial data

let outByte = 0; // for outgoing data

​

let horizontalPlot = 200; //for the horizontal movement of the ellipse

​

let backgroundImage;

​

function preload() {

  backgroundImage = loadImage("background space.jpg");

  ufo = loadImage("ufo.png")

​

}

​

function setup() {

  createCanvas(300, 300); // make the canvas

​

  backgroundImage = loadImage("background space.jpg");

​

  frameRate(60); //to smooth out the movement a little bit

​

  // check to see if serial is available:

  if (!navigator.serial) {

    alert("WebSerial is not supported in this browser. Try Chrome or MS Edge.");

  }

  // if serial is available, add connect/disconnect listeners:

  navigator.serial.addEventListener("connect", portConnect);

  navigator.serial.addEventListener("disconnect", portDisconnect);

  // check for any ports that are available:

  serial.getPorts();

  // if there's no port chosen, choose one:

  serial.on("noport", makePortButton);

  // open whatever port is available:

  serial.on("portavailable", openPort);

  // handle serial errors:

  serial.on("requesterror", portError);

  // handle any incoming serial data:

  serial.on("data", serialEvent);

  serial.on("close", makePortButton);

}

​

function draw() {

  background(backgroundImage);

  // fill(225)

  // text("sensor value: " + inData, 30, 50);

  // horizontalPlot = inData + 20;

  //the +20 is to make sure the image doesnt cut on the edge

  image(ufo, inData, 150,50,30)

  print(inData)

//   // circle(horizontalPlot, height / 2, 40);

}

​

// if there's no port selected,

// make a port select button appear:

function makePortButton() {

  // create and position a port chooser button:

  portButton = createButton("choose port");

  portButton.position(10, 10);

  // give the port button a mousepressed handler:

  portButton.mousePressed(choosePort);

}

​

// make the port selector window appear:

function choosePort() {

  if (portButton) portButton.show();

  serial.requestPort();

}

​

// open the selected port, and make the port

// button invisible:

function openPort() {

  // wait for the serial.open promise to return,

  // then call the initiateSerial function

  serial.open().then(initiateSerial);

​

  // once the port opens, let the user know:

  function initiateSerial() {

    console.log("port open");

  }

  // hide the port button once a port is chosen:

  if (portButton) portButton.hide();

}

​

// pop up an alert if there's a port error:

function portError(err) {

  alert("Serial port error: " + err);

}

// read any incoming data as a string

// (assumes a newline at the end of it):

function serialEvent() {

  inData = Number(serial.read());

  console.log(inData);

}

​

// try to connect if a new serial port

// gets added (i.e. plugged in via USB):

function portConnect() {

  console.log("port connected");

  serial.getPorts();

}

​

// if a port is disconnected:

function portDisconnect() {

  serial.close();

  console.log("port disconnected");

}

​

function closePort() {

  serial.close();

}

​

​

​

//Arduino code

// void setup() {

//   Serial.begin(9600); // initialize serial communications

// }

// void loop() {

//   // read the input pin:

//   int potentiometer = analogRead(A0);                  

//   // remap the pot value to fit in 1 byte:

//   int mappedPot = map(potentiometer, 0, 1023, 0, 255);

//   // print it out the serial port:

//   Serial.write(mappedPot);

//   //Serial.println(mappedPot);

//   // slight delay to stabilize the ADC:

//   delay(200);                                            

// }

​