#include <Arduino.h>
#include <LCD_I2C.h>

LCD_I2C lcd(0x27, 16, 2);
const int trigPin = 5;  
const int echoPin = 18;  

void setup() {
  Serial.begin(115200);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  lcd.begin();
  lcd.backlight();
}

void loop() {
  
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  
  
  long duration = pulseIn(echoPin, HIGH);
  
  
  float distance_cm = duration * 0.034 / 2;
  
  lcd.setCursor(0, 0);
  lcd.println("Distance:");
  lcd.println(distance_cm);
  
  delay(1000);  
}