#include <LiquidCrystal.h>
// LCD pin connections (RS, EN, D4, D5, D6, D7)
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);
// Define pin connections
int ldrPin = A0; // Analog pin for LDR
int ledPin = 13; // Digital pin for LED
// Set a threshold value (adjust based on your lighting conditions)
int threshold = 500;
void setup() {
 // Initialize the LED pin as an output
 pinMode(ledPin, OUTPUT);
 // Initialize serial communication (optional for debugging)
 Serial.begin(9600);
 // Initialize the LCD
 lcd.begin(16, 2); // Set up the LCD's number of columns and rows
 lcd.print("hi nasir"); // Display initial message
 delay(2000); // Pause to allow reading message
 lcd.clear();
}
void loop() {
 // Read the analog value from the LDR
 int ldrValue = analogRead(ldrPin);
 // Print the LDR value to the Serial Monitor (optional for debugging)
 Serial.print("LDR Value: ");
 Serial.println(ldrValue);
 // Display the LDR value on the LCD
 lcd.setCursor(0, 0); // First row, first column
 lcd.print("LDR: ");
 lcd.print(ldrValue);
 // If the LDR value is below the threshold (it's dark), turn on the LED
 if (ldrValue < threshold) {
 digitalWrite(ledPin, HIGH); // Turn on LED
 lcd.setCursor(0, 1); // Move cursor to second row
 lcd.print("LED: ON ");
 }
 // If the LDR value is above the threshold (it's bright), turn off the LED
 else {
 digitalWrite(ledPin, LOW); // Turn off LED
 lcd.setCursor(0, 1); // Move cursor to second row
 lcd.print("LED: OFF ");
 }
 // Small delay to avoid rapid changes
 delay(500);
}