#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2); // Set the LCD I2C address and size
const int trigPin = 2; // Ultrasonic sensor trigger pin
const int echoPin = 3; // Ultrasonic sensor echo pin

void setup() {
  lcd.init(); // Initialize the LCD
  lcd.backlight(); // Turn on the backlight
  
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  
  Serial.begin(9600);
}

void loop() {
  long duration, distance_cm;
  
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  
  duration = pulseIn(echoPin, HIGH);
  distance_cm = duration * 0.034 / 2; // Calculate distance in cm
  
  lcd.clear(); // Clear the LCD screen
  lcd.setCursor(0, 0); // Set the cursor to the first line
  lcd.print("Distance: ");
  lcd.print(distance_cm);
  lcd.print(" cm");
  
  delay(1000); // Delay for better readability
}