#include <LiquidCrystal.h>
#define LDR_PIN A0    // Use analog pin for LDR
#define LED_PIN 9     // Use LED to simulate bulb

LiquidCrystal lcd(7, 6, 5, 4, 3, 2);

void setup() {
  // Initialize LCD
  lcd.begin(16, 2);
  lcd.print("Initialising:");
  delay(2000);
  lcd.clear();
  
  // Set up the pins
  pinMode(LDR_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);  // LED pin as output
}

void loop() {
  // Read LDR value (0-1023 from analog pin)
  int ldrValue = analogRead(LDR_PIN);

  // Debug: Show LDR value on LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("LDR Value: ");
  lcd.print(ldrValue);

  // Define a threshold for brightness (e.g., below 500 is dark)
  int threshold = 500;  // You may need to adjust this threshold

  // Debugging: Print threshold status
  lcd.setCursor(0, 1);
  if (ldrValue < threshold) {
    digitalWrite(LED_PIN, HIGH);  // Turn LED ON
    lcd.print("Light ON ");
  } else {
    digitalWrite(LED_PIN, LOW);   // Turn LED OFF
    lcd.print("Light OFF");
  }

  delay(500);
}