Virtual IoT Lab DEI

ARDUINO CODE
/* ---------------------------------------------------------
Objective:
Control an LED using a push button. When the button is
pressed, the LED turns ON; otherwise, it stays OFF.

Components:
- LED + 220Ω resistor (current limiting)
- Push Button
- 10kΩ pull-down resistor
- Arduino Uno Board

Working:
Digital pin 2 reads the button state. If it becomes HIGH
(button pressed), Arduino sets LED pin HIGH to turn it ON.
--------------------------------------------------------- */

int buttonState = 0;   // Variable to store button input state
const int buttonPin = 2;       // Push button connected to pin 2
const int ledPin = LED_BUILTIN; // Built-in LED on pin 13

void setup() {
  pinMode(buttonPin, INPUT);     // Set button pin as input
  pinMode(ledPin, OUTPUT);       // Set LED pin as output
}

void loop() {
  buttonState = digitalRead(buttonPin);  // Read button state

  if (buttonState == HIGH) {
    digitalWrite(ledPin, HIGH);  // Turn LED ON
  } else {
    digitalWrite(ledPin, LOW);   // Turn LED OFF
  }

  delay(10); // Small delay for stable simulation
}
Start Simulation
