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

// Pin definitions for ultrasonic sensor
const int trigPin = 12; // Trigger pin
const int echoPin = 14; // Echo pin

// Pin definitions for LCD
const int lcdColumns = 16;
const int lcdRows = 2;
const int lcdAddress = 0x27; // I2C address
const int lcdBacklight = 0x08; // Backlight control bit
LiquidCrystal_I2C lcd(lcdAddress, lcdColumns, lcdRows);

void setup() {
  // Initialize serial communication
  Serial.begin(9600);

  // Initialize LCD
  lcd.init();
  lcd.backlight();
  lcd.clear();

  // Initialize ultrasonic sensor pins
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
}

void loop() {
  // Trigger ultrasonic sensor
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Measure echo pulse duration
  long duration = pulseIn(echoPin, HIGH);

  // Calculate distance in centimeters
  float distance_cm = duration * 0.034 / 2;

  // Print distance to serial monitor
  Serial.print("Distance: ");
  Serial.print(distance_cm);
  Serial.println(" cm");

  // Print distance to LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Distance:");
  lcd.setCursor(0, 1);
  lcd.print(distance_cm);
  lcd.print(" cm");

  delay(1000); // Delay between measurements
}