#include <LiquidCrystal_I2C.h>

// Initialize the library with the I2C address, columns, and rows
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  Serial.begin(9600);        // Start the Serial communication
  lcd.init();               // Initialize the LCD
  lcd.backlight();           // Turn on the backlight
  pinMode(3, OUTPUT);        // Set pin 3 as an output
}
void loop() {
  int ldrVal = analogRead(A3);  // Read the LDR value from analog pin A3
  Serial.println(ldrVal);       // Print the LDR value to the Serial monitor

  lcd.clear();                  // Clear the LCD
  lcd.setCursor(0, 0);          // Set the cursor to the first column, first row
  lcd.print("LDR value");       // Print "LDR value" on the LCD
  lcd.setCursor(0, 1);          // Set the cursor to the first column, second row
  lcd.print(ldrVal);            // Print the LDR value on the LCD

  if (ldrVal < 80) {
    analogWrite(3, 200);        // Write a value of 200 to pin 3 if the LDR value is less than 80
  } else {
    analogWrite(3, LOW);        // Turn off the output to pin 3 if the LDR value is 80 or more
  }

  delay(200);                   // Delay for 200 milliseconds
}