#define BLYNK_TEMPLATE_ID "Your_Template_ID"
#define BLYNK_TEMPLATE_NAME "Your_Template_Name"
#define BLYNK_AUTH_TOKEN "Your_Blynk_Auth_Token"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <SPI.h>
#include <MFRC522.h>
#include <ESP32Servo.h>

// WiFi credentials
char ssid[] = "Your_WiFi_Name";       // Replace with your WiFi SSID
char pass[] = "Your_WiFi_Password";   // Replace with your WiFi Password

// RFID setup
#define RST_PIN 22
#define SS_PIN 21
MFRC522 rfid(SS_PIN, RST_PIN);

// Servo setup
#define SERVO_PIN 13
Servo myServo;

// Known UIDs (replace with your actual card UIDs)
byte card1[4] = {0xDE, 0xAD, 0xBE, 0xEF};  // Replace with your card's UID
byte card2[4] = {0xBA, 0xAD, 0xF0, 0x0D};  // Replace with your card's UID

BlynkTimer timer;

// Compare UID with allowed card
bool checkUID(byte *uid, byte *validUID) {
  for (byte i = 0; i < 4; i++) {
    if (uid[i] != validUID[i]) return false;
  }
  return true;
}

// Servo movement
void moveServo() {
  myServo.write(90);
  delay(1500);
  myServo.write(0);
}

// Blynk button (V0)
BLYNK_WRITE(V0) {
  int state = param.asInt();
  if (state == 1) {
    moveServo();
  }
}

// Check RFID
void checkRFID() {
  if (!rfid.PICC_IsNewCardPresent() || !rfid.PICC_ReadCardSerial()) return;

  Serial.print("UID tag: ");
  for (byte i = 0; i < rfid.uid.size; i++) {
    Serial.print(rfid.uid.uidByte[i] < 0x10 ? " 0" : " ");
    Serial.print(rfid.uid.uidByte[i], HEX);
  }
  Serial.println();

  if (checkUID(rfid.uid.uidByte, card1) || checkUID(rfid.uid.uidByte, card2)) {
    Serial.println("Access granted");
    moveServo();
    Blynk.logEvent("rfid_detected", "RFID Access Detected");
  } else {
    Serial.println("Access denied");
  }

  rfid.PICC_HaltA();
  rfid.PCD_StopCrypto1();
}

void setup() {
  Serial.begin(9600);
  SPI.begin();
  rfid.PCD_Init();
  myServo.attach(SERVO_PIN);
  myServo.write(0);

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
  timer.setInterval(500L, checkRFID);

  Serial.println("Ready - scan RFID card or press Blynk button");
}

void loop() {
  Blynk.run();
  timer.run();
}