#include <ESP32Servo.h>

const int pirPin = 25; 
const int trigPin = 0;
const int echoPin = 1;
const int buttonPin = 2;
const int servoPin = 4;
const int buzzerPin = 15;
Servo Servo;
bool motionDetected = false;
#define NOTE_B4 494
#define NOTE_F4 394

void setup() {
  Servo.attach(4, 500, 2400);
  pinMode(25, INPUT);
  pinMode(0, OUTPUT);
  pinMode(1, INPUT);
  pinMode(2, INPUT_PULLUP);
  pinMode(15, OUTPUT);
  pinMode(4, OUTPUT);
  Serial.begin(115200);
}
int pos = 0;

void loop() {
  motionDetected = digitalRead(pirPin);
  long duration, distance;
    digitalWrite(0, LOW);
    delayMicroseconds(2);
    digitalWrite(0, HIGH);
    delayMicroseconds(10);
    digitalWrite(0, LOW);
    duration = pulseIn(1, HIGH);
    distance = (duration * 0.0343 / 2);

   if (motionDetected || distance < 20) {
  openDoors();
     }

   if (digitalRead(2) == HIGH) {
    openDoors();
    delay(200);
  soundBuzzer();
   closeDoors();
    delay(15);
   }
}

void openDoors() {
  for (pos = 0; pos <= 90; pos += 1) { 
    Servo.write(pos); 
    delay(15); 
  }
 
}
void closeDoors() {
  for (pos = 90; pos >= 0; pos -= 1) {  
    Servo.write(pos);  
    delay(15);        
  }
}
void soundBuzzer() {
  digitalWrite(15, HIGH);
  delay(500);
  digitalWrite(15, LOW);
  delay(500);
}