​

function setup() {

    createCanvas(500, 500);

}

​

function draw() {

    if (!serialActive) {

        console.log('ARDUINO IS NOT CONNECTED')

    }

    if (keyIsDown(UP_ARROW)) { 

      brightnessLVL += 1; 

    } 

    else if (keyIsDown(DOWN_ARROW) && brightnessLVL > 0) {

      brightnessLVL -= 1;

    }

    console.log(brightnessLVL)

}

​

function keyPressed() {

    if (key == " ")

        setUpSerial(); // Start the serial connection

}

​

function readSerial(data) {

    writeSerial(brightnessLVL);

}

​

// ARDUINO CODE

​

/*

void setup() {

    Serial.begin(9600);

    pinMode(10, OUTPUT);

}

​

void loop() {

    analogWrite(10, Serial.parseInt());

    Serial.println();

    delay(1);

}

*/