#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

const int UDS_MIN = 112;
const int UDS_MAX = 23391;
const int D_MIN = 2;
const int D_MAX = 400;
int echoPin = 2;
int trigPin = 3;
int distance;

void setup() {
  Serial.begin(9600);
  pinMode(echoPin, INPUT);
  pinMode(trigPin, OUTPUT);

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

void loop() {
  delay(100);

  digitalWrite(trigPin, HIGH);
  digitalWrite(trigPin, LOW);
  distance = map(pulseIn(echoPin, HIGH), UDS_MIN, UDS_MAX, D_MIN, D_MAX);

  lcd.setCursor(10,0);
  lcd.print("   ");
  lcd.setCursor(10,0);
  lcd.print(distance);

  lcd.setCursor(0,1);
  lcd.print("           ");
  lcd.setCursor(0,1);
  lcd.print(distance < 50 ? "dekat" : distance < 100 ? "sedang" : distance < 200 ? "jauh" : "sangat jauh");
}