// based on Tom Igoe's lab examples

​

const serial = new p5.WebSerial();

let portButton;

let inData, inData2;

​

function setup() {

  createCanvas(800, 600);

  allSerialStuff();

}

​

function draw() {

  // do your drawing stuff here

  var xPopsition = map(inData, 0, 1023, 0, width);

  var yPopsition = map(inData2, 0, 1023, 0, height);

  fill(0);

  ellipse(xPopsition, yPopsition, 15, 15);

}

​

function serialEvent() {

  // this is called when data is recieved, data will then live in fromSerial

  var stringFromSerial = serial.readLine(); // reads everything till the new line charecter

  if (stringFromSerial) {

    // is the something there ?

    var trimmedString = trim(stringFromSerial); // get rid of all white space

    var myArray = split(trimmedString, ","); // splits the string into an array on commas

    inData = Number(myArray[0]); // get the first item in the array and turn into integer

    inData2 = Number(myArray[1]); // get the second item in the array and turn into integer

  }

}

​

/*  

// Arduino Code 

void setup() {

  Serial.begin(9600);

}

void loop() {

  int valueToSend = analogRead(A0);

  Serial.print(valueToSend);

  Serial.print(",");

  valueToSend = analogRead(A1);

  Serial.println(valueToSend);

  delay (10);

}

*/

function allSerialStuff() {

  if (!navigator.serial) {

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

  }

  // 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);

  // add serial connect/disconnect listeners:

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

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

}

// 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:

// 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):

​

// 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();

}

​