let brightnessValue = 0;

​

function setup() {

  createCanvas(400, 200);

​

  // Create a brightness slider

  brightnessSlider = createSlider(0, 255, 128);

  brightnessSlider.position(width/2-50, height/2);

  brightnessSlider.style('width', '100px');

}

​

function draw() {

  background(255);

​

  // Get the brightness value from the slider

  brightnessValue = brightnessSlider.value();

}

​

function keyPressed() {

  if (key == " ") {

    // important to have in order to start the serial connection!!

    setUpSerial();

  }

}

​

function readSerial(data) {

  console.log(data);

    let dataToSend = brightnessValue + ", \n";

    writeSerial(dataToSend);  

}

​

///Arduino COde

/*

​

const int ledPin = 9;  // Digital output pin for the LED

​

void setup() {

  pinMode(ledPin, OUTPUT);

​

  // Start serial communication

  Serial.begin(9600);

}

​

void loop() {

  Serial.println("sensor");

  // Check if data is available from p5.js

  if (Serial.available() > 0) {

    // Read the brightness value from p5.js

    int brightness = Serial.parseInt();

​

    // Map the received value to the LED brightness range

    brightness = constrain(brightness, 0, 255);

​

    // Set the LED brightness

    analogWrite(ledPin, brightness);

  }

}

​

*/