#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);
int echoPin = 2;
int trigPin = 3;

float distance, duration;

void setup() {
  pinMode(echoPin, INPUT);
  pinMode(trigPin, OUTPUT);

  lcd.init();
  lcd.clear();
  lcd.backlight();

  lcd.setCursor(0, 0);
  lcd.print("Distance:");
}

void loop() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  distance = (pulseIn(echoPin, HIGH) * .0343) / 2;

  lcd.setCursor(9, 0);
  lcd.print(String(distance) + "  ");

  lcd.setCursor(0, 1);
  lcd.print(checkDistance(distance));
}

String checkDistance(float distance) {
  return (distance < 10) ? "dekat " : (distance < 50) ? "sedang"
                                                     : "jauh  ";
}