#include <ESP32Servo.h>

Servo Serv;
const int pinIR = 13;    // Pin PIR
const int pinServo = 12; // Pin Servo
const int pinLED = 14;   // Pin LED
int val = 0;

void setup() {
  Serial.begin(115200);
  
  // Membenarkan timer ESP32 untuk PWM Servo
  ESP32PWM::allocateTimer(0);
  ESP32PWM::allocateTimer(1);
  ESP32PWM::allocateTimer(2);
  ESP32PWM::allocateTimer(3);
  
  Serv.setPeriodHertz(50);    // Standard 50hz servo
  Serv.attach(pinServo, 500, 2400); 
  
  Serv.write(0); 
  pinMode(pinIR, INPUT); 
  pinMode(pinLED, OUTPUT);

  Serial.println("--- Sistem Dimulakan ---");
  Serial.println("[SYSTEM] LED & Servo sedia.");
}

void loop() {
  val = digitalRead(pinIR); 

  if (val == HIGH) { 
    Serial.println("[ALERT] Pergerakan Dikesan!");
    
    digitalWrite(pinLED, HIGH); // Hidupkan LED
    Serv.write(90);             // Buka (90 darjah)
    
    delay(5000);                // Tunggu 5 saat
    
    digitalWrite(pinLED, LOW);  // Matikan LED
    Serv.write(0);              // Tutup semula
    Serial.println("[STATUS] Kembali ke Standby.");
    
    // Delay tambahan supaya sensor PIR tidak "double trigger"
    delay(1000); 
  }
  
  delay(100); 
}