#define SERVO_PIN 2       // Pin connected to servo motor
#define IR_SENSOR_PIN 4   // Pin connected to IR sensor
#define RELAY_PIN 5       // Pin connected to relay module
#define LED_PIN 13        // Pin connected to LED

#define SERVO_FREQ 50     // Servo frequency in Hz
#define SERVO_MIN_DUTY 2  // Minimum duty cycle for servo (in percentage)
#define SERVO_MAX_DUTY 12 // Maximum duty cycle for servo (in percentage)

int irSensorState = LOW;
bool doorOpen = false;

void setup() {
  pinMode(SERVO_PIN, OUTPUT);
  pinMode(IR_SENSOR_PIN, INPUT);
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);
  
  Serial.begin(9600);
}

void loop() {
  irSensorState = digitalRead(IR_SENSOR_PIN);
  
  if (irSensorState == HIGH) {
    if (!doorOpen) {
      openDoor();
    }
  } else {
    if (doorOpen) {
      closeDoor();
    }
  }
}

void openDoor() {
  for (int dutyCycle = SERVO_MIN_DUTY; dutyCycle <= SERVO_MAX_DUTY; dutyCycle++) {
    ledcWrite(0, dutyCycle);  // Rotate servo to open the door
    delay(15); // Adjust delay as per your servo's speed
  }
  digitalWrite(RELAY_PIN, HIGH);  // Activate relay to control door mechanism
  digitalWrite(LED_PIN, HIGH);    // Turn on LED to indicate door opening
  doorOpen = true;
}

void closeDoor() {
  for (int dutyCycle = SERVO_MAX_DUTY; dutyCycle >= SERVO_MIN_DUTY; dutyCycle--) {
    ledcWrite(0, dutyCycle);  // Rotate servo to close the door
    delay(15); // Adjust delay as per your servo's speed
  }
  digitalWrite(RELAY_PIN, LOW);   // Deactivate relay
  digitalWrite(LED_PIN, LOW);     // Turn off LED
  doorOpen = false;
}