Build Instructions

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  Run a Program

  #include #include
  int hall_sensor = 3;
  int state,lockread;
  int Buzzer = 4;
  const int LockPin = 2;
  #define SS_PIN 10
  #define RST_PIN 9
  MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance.
  void setup()
  {
  Serial.begin(9600); // Initiate a serial communication
  pinMode(LockPin, OUTPUT);
  pinMode(Buzzer, OUTPUT);
  pinMode(hall_sensor, INPUT);
  SPI.begin(); // Initiate SPI bus
  mfrc522.PCD_Init(); // Initiate MFRC522
  //Serial.println("Approximate your card to the reader...");
  // Serial.println();
  digitalWrite(LockPin, LOW);
  }
  void readsensor()
  {
  lockread = digitalRead(LockPin);
  state = digitalRead(hall_sensor);
  //Serial.print(lockread);
  //Serial.print(state);
  // delay(2000);
  }
  void loop()
  {
  readsensor();
  sensor();
  // Look for new cards
  if ( ! mfrc522.PICC_IsNewCardPresent())
  {
  return;
  }
  // Select one of the cards
  if ( ! mfrc522.PICC_ReadCardSerial())
  {
  return;
  }
  //Show UID on serial monitor
  String content= "";
  byte letter;
  for (byte i = 0; i < mfrc522.uid.size; i++)
  {
  content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "));
  content.concat(String(mfrc522.uid.uidByte[i], HEX));
  }
  //Serial.println();
  //Serial.print("Message : ");
  content.toUpperCase();
  if (content.substring(1) == "60 4E 07 1E" ) //change here the UID of the card/cards that you want to give access
  {
  digitalWrite(LockPin, HIGH);
  Serial.print("Door Unlocked");
  digitalWrite(Buzzer, HIGH);
  delay(2000);
  digitalWrite(Buzzer, LOW);
  sensor();
  }
  else
  {
  Serial.println("You are not Authorised");
  digitalWrite(Buzzer, HIGH);
  delay(2000);
  digitalWrite(Buzzer, LOW);
  }
  }
  void sensor()
  {
  readsensor();
  if (lockread == HIGH){
  readsensor();
  if(state==LOW){
  digitalWrite(LockPin, LOW);
  Serial.print("Door Closed");
  digitalWrite(Buzzer, HIGH);
  delay(2000);
  digitalWrite(Buzzer, LOW);
  }
  }
  }

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