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

LiquidCrystal_I2C lcd(0x27, 16, 2);  // Alamat I2C modul LCD

const int trigPin = 7;
const int echoPin = 6;

void setup() {
  Serial.begin(9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  
  lcd.init();                      // Inisialisasi LCD
  lcd.backlight();                 // Nyalakan lampu latar LCD
  lcd.setCursor(0, 0);
  lcd.print("Kedalaman Tangki:");
}

void loop() {
  long duration, distance;
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  
  duration = pulseIn(echoPin, HIGH);
  distance = (duration / 2) / 29.1;  // Menghitung kedalaman dalam sentimeter
  
  Serial.print("Kedalaman: ");
  Serial.print(distance);
  Serial.println(" cm");

  lcd.setCursor(0, 1);
  lcd.print("            ");  // Hapus data sebelumnya di LCD
  lcd.setCursor(4, 1);
  lcd.print(distance);
  lcd.print(" cm");

  delay(1000);  // Ukuran kedalaman akan diperbarui setiap detik
}