let shapeFraction = 0; // tracks the new shape fraction off serial

let serial; // the Serial object

let pHtmlMsg; // used for displaying messages via html (optional)

​

function setup() {

  createCanvas(600, 600);

​

  // Setup Web Serial using serial.js

  serial = new Serial();

  serial.on(SerialEvents.CONNECTION_OPENED, onSerialConnectionOpened);

  serial.on(SerialEvents.CONNECTION_CLOSED, onSerialConnectionClosed);

  serial.on(SerialEvents.DATA_RECEIVED, onSerialDataReceived);

  serial.on(SerialEvents.ERROR_OCCURRED, onSerialErrorOccurred);

​

  // If we have previously approved ports, attempt to connect with them

  serial.autoConnectAndOpenPreviouslyApprovedPort(serialOptions);

​

  // Add in a lil <p> element to provide messages. This is optional

  pHtmlMsg = createP(

    "Click anywhere on this page to open the serial connection dialog"

  );

}

​

function draw() {

  noFill();

  rect(1,1,599,599);

}

​

function onSerialErrorOccurred(eventSender, error) {

  console.log("onSerialErrorOccurred", error);

  pHtmlMsg.html(error);

}

​

function onSerialConnectionOpened(eventSender) {

  console.log("onSerialConnectionOpened");

  pHtmlMsg.html("Serial connection opened successfully");

}

​

function onSerialConnectionClosed(eventSender) {

  console.log("onSerialConnectionClosed");

  pHtmlMsg.html("onSerialConnectionClosed");

}

​

function onSerialDataReceived(eventSender, newData) {

  console.log("onSerialDataReceived", newData);

  pHtmlMsg.html("onSerialDataReceived: " + newData);

}

​

function mouseClicked() {

  if (!serial.isOpen()) {

    serial.connectAndOpen(null, serialOptions);

  }

}