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

#define echoPin 18 // Attach pin D2 Arduino to pin Echo of HC-SR04
#define trigPin 5  // Attach pin D3 Arduino to pin Trig of HC-SR04

LiquidCrystal_I2C lcd(0x27, 16, 2);

// Defines variables
long duration; // Variable for the duration of sound wave travel
int distance;   // Variable for the distance measurement

void setup() {
  Wire.begin();
  lcd.begin(16, 2);
  lcd.setCursor(0, 0);
  lcd.print(" MONSTERCHIP");
  lcd.setCursor(0, 1);
  lcd.print(" badut");
  delay(5000);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("  Ultrasonic");
  pinMode(trigPin, OUTPUT); // Sets the trigPin as an OUTPUT
  pinMode(echoPin, INPUT);  // Sets the echoPin as an INPUT
  Serial.begin(115200);
}

void loop() {
  // Clears the trigPin condition
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);

  // Sets the trigPin HIGH (ACTIVE) for 10 microseconds
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Reads the echoPin, returns the sound wave travel time in microseconds
  duration = pulseIn(echoPin, HIGH);

  // Calculating the distance
  distance = duration * 0.034 / 2; // Speed of sound wave divided by 2 (go and back)

  // Clear the distance display before printing the new distance
  lcd.setCursor(9, 1);
  lcd.print("               ");

  lcd.setCursor(0, 1);
  lcd.print("Distance: ");
  lcd.setCursor(9, 1);
  lcd.print(distance);
  lcd.print(" cm ");

  delay(500); // Add a small delay to make the display readable
}