//MENAMPILKAN JARAK DENGAN ULTRASONIK
//BY NIA 
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C inu(0x27, 16, 2); //inisialisasi pada LCD

int trig = 18;
int echo = 5;
long duration_distance;
float sound = 0.034;

void setup() {
  inu.init();
  inu.backlight();
  inu.clear();
  pinMode(trig, OUTPUT); //karena memancarkan 
  pinMode(echo, INPUT); //karena menerima suara
  Serial.begin(9600);
  inu.setCursor(0,0);
  inu.print(" NIA PROJECT");
  inu.setCursor(0,1);
  inu.print("   Ultrasonic   ");
  delay(2000);
  inu.clear();
}

void loop() {
  digitalWrite(trig, LOW);
  delayMicroseconds(5);
  digitalWrite(trig, HIGH);
  delayMicroseconds(5);
  digitalWrite(trig, LOW);
  delayMicroseconds(5);

  duration = pulseIn(echo, HIGH);
  distance = duration*sound/2;

  inu.setCursor(0,0);
  inu.print("the distance is:");
  inu.setCursor(0,1);
  inu.print(distance);
  delay(10);
  inu.print(" cm  ");
}