#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);
float cm,inci;
long  ReadUltrasonicTime(int pintrigger,int pinecho){
  pinMode(pintrigger, OUTPUT);
  pinMode(pinecho, INPUT);
  digitalWrite(pintrigger, LOW); //memastikan ultrasonik mati
  delayMicroseconds(2);
  digitalWrite(pintrigger, HIGH);//menyalakan ultrasonik
  delayMicroseconds(10);
  digitalWrite(pintrigger, LOW);//mematikan ultrasonik
  return pulseIn(pinecho, HIGH);//menghitung waktu ultrasonik untuk diterima oleh sensor
}

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();        
  lcd.setCursor(5,0);
  lcd.print("DHIKA");         //biar kelihata keren
  lcd.setCursor(1,1);
  lcd.print("ELECTRONICS.CO");
  delay(1600);
  lcd.clear();
}

void loop() {
  cm = 0.03420/2 * ReadUltrasonicTime(4, 3);    // kecepatan suara * waktu / 2
  inci = cm / 2.54;
  lcd.setCursor(3, 0);
  lcd.print("CM");
  lcd.setCursor(10, 0);
  lcd.print("inci");
  lcd.setCursor(2, 1);
  lcd.print(cm, 1);
  lcd.setCursor(10, 1);
  lcd.print(inci, 1);
  delay(1000);
  lcd.clear();
}