//Write On to the serial monitor and this turn on the LED 
//And Off turns off LED. If command is something else microcontroller 
//write invalid command to the Serial monitor 
//https://wokwi.com/projects/391786526475331585
#include <Arduino.h>

#define LED_PIN 2
bool led_status = false;
String command;

void setup() {
    Serial.begin(9600);
    pinMode(LED_PIN, OUTPUT);
}

void loop() {
    if (Serial.available() > 0) {
        command = Serial.readStringUntil('\n');

        if (command == "on") {
            digitalWrite(LED_PIN, HIGH); // Turn the LED on
            led_status = true;
            Serial.println("LED turned on");
        } else if (command == "off") {
            digitalWrite(LED_PIN, LOW); // Turn the LED off
            led_status = false;
            Serial.println("LED turned off");
        } else {
            // Invalid command
            Serial.println("Invalid command");
        }
    }
}