#include <Servo.h>
#define triggerPin 12
#define echoPin 13
#define ledPin 2
#define speakerPin 10
#define pitch 260
#define pitch1 400
int Pir = 8;
int statusPir = 0;
Servo myservo;
double duration, distance;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(triggerPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(speakerPin, OUTPUT);
  Serial.println("Smart Door");
  myservo.attach(6);
  pinMode(Pir, INPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  if (analogRead(A0) < 200) {
    tone(speakerPin, pitch1);
    delay(300);
  } else {
    noTone(speakerPin);
    delay(300);
  }
  digitalWrite(triggerPin, LOW);
  delayMicroseconds(2);
  digitalWrite(triggerPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(triggerPin, LOW);
  delayMicroseconds(2);
  duration = pulseIn(echoPin,HIGH);
  distance = (duration/2) * 0.0343;
  if(distance<200){
    digitalWrite(ledPin, HIGH);
    tone(speakerPin, pitch);
    delay(300);

    digitalWrite(ledPin, LOW);
    noTone(speakerPin);
    delay(300);
  }else{
    digitalWrite(ledPin, LOW);
    noTone(speakerPin);
  }
  statusPir = digitalRead(Pir);
  if(statusPir == HIGH){
    myservo.write(45); 
    delay(1000);          
    myservo.write(0);   
    delay(3000);          
    myservo.write(90);  
    delay(1000); 
    Serial.println("Door open");
    delay(1000);
  }else {
    Serial.println("Door closed");
  }

  
}