// Sistem Alarm Anti Maling Dengan Sensor Ultera Sonik
// Jawaban UAS Mikrokonteroler No 5 Bagian b

//  Muhammad Rofiqi - Nim 2114110001 

#define TRIGGER_PIN  12
#define ECHO_PIN     13
#define BUZZER_PIN   10
#define LED_PIN      2
#define PIR_PIN      8
#define pitch 262
double duration, distance;


void setup() {
  Serial.begin(9600);
  pinMode(TRIGGER_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);
  pinMode(PIR_PIN, INPUT);
  
  Serial.println("Ultrasonic Sensor and PIR Motion Detector");
  Serial.println("==========================================");
}

void loop(){
  // sensor ultera sonik
digitalWrite(TRIGGER_PIN, HIGH);
delayMicroseconds(2);
digitalWrite(TRIGGER_PIN, HIGH);
delayMicroseconds(10);
digitalWrite(TRIGGER_PIN, LOW);
delayMicroseconds(2);

// mendapatkan durasi
duration = pulseIn(ECHO_PIN, HIGH);

// menghitung jarak
distance = (duration/2) * 0.0343;

// mempertimbangkan jarak maksimum pintu
if(distance>200) {
digitalWrite(LED_PIN, HIGH);
tone(BUZZER_PIN , pitch);

delay(200);
digitalWrite(LED_PIN, LOW);

noTone(BUZZER_PIN );
delay(200);
}

else{
  digitalWrite(LED_PIN, LOW);
  noTone(BUZZER_PIN );
}
}