#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,20,4);

float cm;
float inchi;

long readUltrasonicDistance(int triggerPin, int echoPin){
  pinMode(triggerPin, OUTPUT);
  digitalWrite(triggerPin, LOW);
  delayMicroseconds(2);
  digitalWrite(triggerPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(triggerPin, LOW);
  pinMode(echoPin, INPUT);

  return pulseIn(echoPin,HIGH);
}

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.print("--> Jarak <--");
  delay(3000);
  lcd.clear();
}

void loop() {
  cm = 0.0344 / 2 * readUltrasonicDistance(3,2);
  inchi = (cm / 2.54);

  // Serial.print("Inchi");
  // Serial.print(inchi,1);
  // Serial.print("\t");
  // Serial.print("cm ");
  // Serial.print(cm,1);
  //delay(1000);

  //LCD

  lcd.setCursor(0,0);
  lcd.print("Inchi");
  lcd.setCursor(4,0);
  lcd.print("cm");
  lcd.setCursor(1,1);
  lcd.print(inchi,1);
  lcd.setCursor(11,1);
  lcd.print(cm,1);
  lcd.setCursor(14,1);
  delay(2000);
  lcd.clear();
}