const int pirPin = 7;         // PIR andur pin
const int trigPin = 8;        // Ultrahelianduri trig pin
const int echoPin = 9;        // Ultrahelianduri echo pin
const int greenLedPin = 10;   // Roheline LED pin
const int redLedPin = 11;     // Punane LED pin
const int buzzerPin = 12;     // Buzzer pin

long duration;
int distance;

void setup() {
  pinMode(pirPin, INPUT);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(greenLedPin, OUTPUT);
  pinMode(redLedPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  Serial.begin(9600); // Serial monitoorimiseks (valikuline)
}

void loop() {
  // Liikumise tuvastamine PIR anduriga
  int motionDetected = digitalRead(pirPin);

  // Ultrahelianduriga kauguse mõõtmine
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  duration = pulseIn(echoPin, HIGH);
  distance = duration * 0.034 / 2; // Kaugus sentimeetrites

  // Kontroll tingimuste järgi
  if (motionDetected == HIGH) {
    if (distance > 50) {
      // Kui liikumine ja kaugus > 50 cm
      digitalWrite(greenLedPin, HIGH);  // Roheline LED vilgub
      digitalWrite(redLedPin, LOW);
      digitalWrite(buzzerPin, LOW);
      delay(500);
      digitalWrite(greenLedPin, LOW);
      delay(500);
    } else {
      // Kui liikumine ja kaugus <= 50 cm
      digitalWrite(redLedPin, HIGH);   // Punane LED sisse
      digitalWrite(greenLedPin, LOW);
      digitalWrite(buzzerPin, HIGH);   // Sireen sisse
    }
  } else {
    // Kui liikumist ei ole
    digitalWrite(greenLedPin, LOW);
    digitalWrite(redLedPin, LOW);
    digitalWrite(buzzerPin, LOW);
  }
}