#include <ESP32Servo.h>

#define PIR_SENSOR 27
#define BUZZER 14
#define LED 12
#define RELAY 26
#define SERVO_PIN 15

Servo myServo;

void setup() {
  Serial.begin(115200);

  pinMode(PIR_SENSOR, INPUT);
  pinMode(BUZZER, OUTPUT);
  pinMode(LED, OUTPUT);
  pinMode(RELAY, OUTPUT);

  myServo.attach(SERVO_PIN);

  // Initial states
  digitalWrite(BUZZER, LOW);
  digitalWrite(LED, LOW);
  digitalWrite(RELAY, LOW);
  myServo.write(0);

  Serial.println("Security System Ready...");
}

void loop() {
  int motion = digitalRead(PIR_SENSOR);

  if (motion == HIGH) {
    Serial.println("⚠ MOTION DETECTED!");
    
    digitalWrite(LED, HIGH);     // Turn on LED
    digitalWrite(BUZZER, HIGH);  // Sound alarm
    digitalWrite(RELAY, HIGH);   // Trigger relay (ON)
    
    myServo.write(90);           // Move servo to 90 degrees
    delay(2000);                 // Alarm active for 2 seconds
  }
  else {
    digitalWrite(LED, LOW);
    digitalWrite(BUZZER, LOW);
    digitalWrite(RELAY, LOW);
    myServo.write(0);            // Servo returns to 0°
  }

  delay(100);
}