RFID + Relay + HC-05 [2FA Auth|HC-05|RFID] [3/3]

/*
   ----------------------------------------------------------------------------
   My twitter is @itsWizardly and my Discord is wizard#7815
   for further details and other examples.

   NOTE: If you have any issues, inform me and I will reply asap.

   This sketch show a simple locking mechanism using the RC522 RFID module.
   ----------------------------------------------------------------------------
   Typical pin layout used:
   -----------------------------------------------------------------------------------------
               MFRC522      Arduino       Arduino   Arduino    Arduino          Arduino
               Reader/PCD   Uno           Mega      Nano v3    Leonardo/Micro   Pro Micro
   Signal      Pin          Pin           Pin       Pin        Pin              Pin
   -----------------------------------------------------------------------------------------
   RST/Reset   RST          9             5         D9         RESET/ICSP-5     RST
   SPI SS      SDA(SS)      10            53        D10        10               10
   SPI MOSI    MOSI         11 / ICSP-4   51        D11        ICSP-4           16
   SPI MISO    MISO         12 / ICSP-1   50        D12        ICSP-1           14
   SPI SCK     SCK          13 / ICSP-3   52        D13        ICSP-3           15

*/

#include <SPI.h>
#include <MFRC522.h>
#define RST_PIN         9           // Configurable, see typical pin layout above
#define SS_PIN          10          // Configurable, see typical pin layout above
MFRC522 mfrc522(SS_PIN, RST_PIN);   // Create MFRC522 instance.

String read_rfid;                   // Add how many you need and don't forget to include the UID.
String ok_rfid_1 = "e199312d";      // This is for my main RFID Card. aka. The one I will be using to turn on my PC. Can also be used to shut it down if you want to.
String ok_rfid_2 = "fbecb673";      // This is for the RFID Keyfob. aka. Shutdown Keyfob. Not advisable tho. Just shutdown your PC normally.
int switch1 = 7;                    // For the Card.
int switch2 = 7;                    // For the Keyfob.
int BlueCom;                        // Bluetooth Command.
int Thing = 8;                      // Pin number where the Thing is connected.

void setup() {

  Serial.begin(9600);               // Initialize serial communications with the PC
  while (!Serial);                  // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)
  SPI.begin();                      // Init SPI bus
  pinMode(Thing, OUTPUT);           // Set Thing Pin as OUTPUT.
  pinMode(switch1, OUTPUT);         // RFID Card to turn ON PC.
  pinMode(switch2, OUTPUT);         // KeyFob to shut it down.


}
/*
   Helper routine to dump a byte array as hex values to Serial.
*/
void dump_byte_array(byte *buffer, byte bufferSize) {
  read_rfid = "";
  for (byte i = 0; i < bufferSize; i++) {
    read_rfid = read_rfid + String(buffer[i], HEX);
  }
}

void On_Switch() {                  // Use this routine when working with Relays and Solenoids etc.
  digitalWrite(switch1, HIGH);
  delay(1000);
  digitalWrite(switch1, LOW);
}

void Off_Switch() {                // You can also just use the card to shutdown your PC. This is just for those moments that you really need to shut it down quickly.
  digitalWrite(switch2, HIGH);     // Use this routine when working with Relays and Solenoids etc.
  delay(5000);
  digitalWrite(switch2, LOW);
}

void BlueOn() {

  digitalWrite(Thing, HIGH);
  mfrc522.PCD_Init();
}

void BlueOff() {

  digitalWrite(Thing, LOW);
  mfrc522.PCD_Reset();
}

void loop() {

  while (Serial.available()) {
    BlueCom = Serial.read();
    Serial.println(BlueCom);
    {

      if (BlueCom == 1)
        BlueOn();
    }
    {

      if (BlueCom == 0)
        BlueOff();
    }
  }

  // Look for new cards
  if (!mfrc522.PICC_IsNewCardPresent())
    return;

  // Select one of the cards
  if (!mfrc522.PICC_ReadCardSerial())
    return;
  dump_byte_array(mfrc522.uid.uidByte, mfrc522.uid.size);

  Serial.println(read_rfid);
  if (read_rfid == ok_rfid_1) { //ok, turn ON PC.
    digitalWrite(switch1, HIGH);
    delay(1000);
    digitalWrite(switch1, LOW);
  }
  Serial.println(read_rfid);
  if (read_rfid == ok_rfid_2) { //ok, turn OFF PC.
    digitalWrite(switch2, HIGH);
    delay(5000);
    digitalWrite(switch2, LOW);
  }
}