#include <LiquidCrystal_I2C.h> //LCD I2C Library
#include <HCSR04.h>             // Ultrasonic sensor Library

LiquidCrystal_I2C lcd(0x27, 16, 2); // 16x2 display

UltraSonicDistanceSensor distanceSensor(13, 12);  // Initialize the sensor using digital pins 13 (Trig) and 12(Echo).

void setup() 
{
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Distance:        "); // Clear the line

  Serial.begin(9600);  // Initialize the serial connection for debugging.
}

void loop() 
{
  int distance;

  // Trigger the HC-SR04 to get a distance measurement
  distance = distanceSensor.measureDistanceCm();

  if(distance != -1)
  {
  // Display the distance on the LCD
  lcd.setCursor(0, 0);
  lcd.print("Distance:"); // Clear the line
  lcd.setCursor(9, 0); // Set cursor to the first row, 10th column
  lcd.print(distance);
  lcd.print("cm ");
  }
  else
  {
  // Display the distance on the LCD
  lcd.clear();
  lcd.setCursor(0, 0); // Set cursor to the first row, 10th column
  lcd.print("Out of range.");
  
  }

  // Print the distance to the Serial Monitor for debugging
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println("cm");

  delay(500); // Adjust the delay to control how often the distance is updated
}