//Program Ultrasonic
//By Rifki Haii
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);
int trig = 4;
int echo = 0; 
long durasi,jarak;
float suara = 0.034;

void setup() {
  lcd.init();
  lcd.backlight();
  lcd.clear(); 
  lcd.setCursor(0,0); 
  lcd.print("HEI IM ON TOP"); 
  lcd.setCursor(0,1); 
  lcd.print("   ULTRASONIC   "); 
  delay(2000); 
  lcd.clear(); 

  pinMode(trig,OUTPUT);
  pinMode(echo,INPUT); 
}

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

  durasi = pulseIn(echo,HIGH); 
  jarak = durasi*suara/2; 

  lcd.setCursor(0,0); 
  lcd.print("Jaraknya adalah:"); 
  lcd.setCursor(0,1); 
  lcd.print(jarak+1); 
  lcd.print("  cm  "); 
  lcd.clear();
  delay(100); 
}