#define TRIGPIN 3
#define ECHOPIN 2
#define pinBuz 12
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd (0x27,16,2);
int jarak,waktu;
void setup(){
  lcd.begin (16, 2);
  lcd.backlight();
  lcd.print("ALARM PARKIR");
  lcd.setCursor(0, 1);
  lcd.print ("MOBIL DEFA");
  delay (2000);
  lcd.clear();
  lcd.print ("Status");

  pinMode (ECHOPIN, INPUT);
  pinMode (TRIGPIN, OUTPUT);
  pinMode (11,OUTPUT);
}

void loop() {
  digitalWrite(TRIGPIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGPIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGPIN, LOW);
  waktu = pulseIn(ECHOPIN, HIGH);
  jarak= waktu/58;
  if (jarak>25){
    lcd.setCursor(7, 0);
    lcd.print("AMAN");

  }
  else if(jarak>20){
    lcd.setCursor(7, 0);
    lcd.print("AWAS");
    digitalWrite(11,1);
    delay(500);
    digitalWrite(11,0);
    delay(500);
  }
  else if (jarak>10){
    lcd.setCursor(7, 0);
    lcd.print("HATI-HATI");
    digitalWrite(11,1);
    delay(300);
    digitalWrite(11,0);
    delay(300);
  }
  else {
    lcd.setCursor(7,0);
    lcd.print("BAHAYA");
    digitalWrite(11,1);
    delay(100);
    digitalWrite(11,0);
    delay(100);
    tone(pinBuz,300);
    delay(20);
    noTone(pinBuz);

  }
}