int ldrPin = A0;
int ledPin = 9;  
int buttonPin = 7;  
int threshold = 500;  

void setup() {
  pinMode(ledPin, OUTPUT);  
  pinMode(buttonPin, INPUT); 
  Serial.begin(9600);       
}

void loop() {
  int sensorValue = analogRead(ldrPin);  
  int buttonState = digitalRead(buttonPin);  
  
  if (sensorValue > threshold || buttonState == HIGH) {
    digitalWrite(ledPin, HIGH);  
    Serial.println("Data: 1");   
  } else {
    digitalWrite(ledPin, LOW);  
    Serial.println("Data: 0");   
  }

  delay(500); 
}