/// MAHESA OGAN
/// MEKATRONIKA

#define TRIGPIN 9
#define ECHOPIN 8
#define pinBuz 11
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);
long timer,jarak;

void setup() {
  // put your setup code here, to run once:
  lcd.begin(16,2);
  lcd.backlight();
  lcd.print("ALARM PARKIR");
  lcd.setCursor(0,1);
  lcd.print("    MOBIL   ");
  delay(2000);
  lcd.clear();
  lcd.print("Status");

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

}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(TRIGPIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGPIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGPIN, LOW);
  timer = pulseIn(ECHOPIN, HIGH);
  jarak = timer/58;
  if (jarak>55){
    lcd.setCursor(7,0);
    lcd.print("Aman");
  }

else if(jarak>30){
  lcd.setCursor(7,0);
  lcd.print("AWAS   ");
  digitalWrite(11,1);
  delay(500);
  digitalWrite(11,0);
  delay(500);
}
else if (jarak>20){
  lcd.setCursor(7,0);
  lcd.print("WASPADA");
  digitalWrite(11,1);
  delay(300);
  digitalWrite(11,0);
  delay(300);
  tone(pinBuz,400);
  delay(50);
  noTone(pinBuz);  
  delay(50);

}
else {
  lcd.setCursor(7,0);
  lcd.print("BAHAYAAA");
  digitalWrite(11,1);
  noTone(pinBuz);
}
}