​

function setup() {

  createCanvas(640, 480);

  textSize(18);

}

​

function draw() {

  background(250);

  //setting up the serial port information

  if (!serialActive) {

    text("Press Space Bar to select Serial Port", 20, 30);

  } else {

    text("Connected", 20, 30);

  //depending on where the mouse is from left to right, sending that value as a brifghtness value to arduino

    brightnessValue = int(map(mouseX, 0, width, 0, 255));

    text('Brightness: ' + str(brightnessValue), 20, 50);

    let sendToArduino = brightnessValue + "\n";

    //printing that value in serial monitor arduino

    writeSerial(sendToArduino);

  }

}

​

function keyPressed() {

  if (key == " ") {

    setUpSerial();

  }

}

​

function readSerial(data) {

  //just to avoid no readSerial error saving data

  if (data != null) {

    let receivedData = data

  }

}