​

function setup() {

    createCanvas(500, 500);

    noFill();

}

​

function draw() {

    background('white');

    if (!serialActive) {

        console.log('ARDUINO IS NOT CONNECTED'); //output to check if Arduino connected or not

    }

    if (serialActive) {

        fill('violet')

        ellipse(map(circleX, 0, 1023, 0, width), height / 2, 100, 100); // using map to make the circle move

        console.log(circleX) //output position to check

    }

}

​

function keyPressed() {

    if (key == " ")

        setUpSerial();

}

​

function readSerial(data) {

    if (data != null) //

        circleX = int(data);

}            

​

​

// ARDUINO CODE

​

/* 

​

​

void setup() {

    Serial.begin(9600);

    pinMode(A0, INPUT);

}

​

void loop() {

    Serial.println(analogRead(A0));

    delay(5);

}

*/