#include <SPI.h>
#include <MFRC522.h>
#include <SoftwareSerial.h>

#define RST_PIN 9      // Configurable, see typical pin layout above
#define SS_PIN 10      // Configurable, see typical pin layout above
#define RX_PIN 2       // HC-05 RX pin
#define TX_PIN 3       // HC-05 TX pin

MFRC522 mfrc522(SS_PIN, RST_PIN);     // Create MFRC522 instance
SoftwareSerial bluetoothSerial(RX_PIN, TX_PIN); // Create SoftwareSerial instance

void setup() {
  Serial.begin(9600);                  // Initialize serial communications with the PC
  bluetoothSerial.begin(9600);         // Initialize Bluetooth serial communications
  SPI.begin();                         // Init SPI bus
  mfrc522.PCD_Init();                  // Init MFRC522 card
  Serial.println(F("Read personal data on a MIFARE PICC:")); // Shows in serial that it is ready to read
}

void loop() {
  // Prepare key - all keys are set to FFFFFFFFFFFFh at chip delivery from the factory.
  MFRC522::MIFARE_Key key;
  for (byte i = 0; i < 6; i++) key.keyByte[i] = 0xFF;

  // Some variables we need
  byte block;
  byte len;
  MFRC522::StatusCode status;

  // Reset the loop if no new card present on the sensor/reader. This saves the entire process when idle.
  if (!mfrc522.PICC_IsNewCardPresent()) {
    return;
  }

  // Select one of the cards
  if (!mfrc522.PICC_ReadCardSerial()) {
    return;
  }

  Serial.println(F("**Card Detected:**"));

  mfrc522.PICC_DumpDetailsToSerial(&(mfrc522.uid)); // Dump some details about the card

  Serial.print(F("Name: "));
  byte buffer1[18];
  block = 4;
  len = 18;

  // Get Item Name
  status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, 4, &key, &(mfrc522.uid));
  if (status != MFRC522::STATUS_OK) {
    Serial.print(F("Authentication failed: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }

  status = mfrc522.MIFARE_Read(block, buffer1, &len);
  if (status != MFRC522::STATUS_OK) {
    Serial.print(F("Reading failed: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }

  // Print Item Name
  for (uint8_t i = 0; i < 16; i++) {
    if (buffer1[i] != 32) {
      Serial.write(buffer1[i]);
      bluetoothSerial.write(buffer1[i]);
    }
  }
  Serial.print(" ");
  bluetoothSerial.print(" ");

  // Get Tag Number
  byte buffer2[18];
  block = 1;

  status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, 1, &key, &(mfrc522.uid));
  if (status != MFRC522::STATUS_OK) {
    Serial.print(F("Authentication failed: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }

  status = mfrc522.MIFARE_Read(block, buffer2, &len);
  if (status != MFRC522::STATUS_OK) {
    Serial.print(F("Reading failed: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }

  // Print Tag Number
  for (uint8_t i = 0; i < 16; i++) {
    Serial.write(buffer2[i]);
    bluetoothSerial.write(buffer2[i]);
  }

  Serial.println(F("\n**End Reading**\n"));

  delay(1000); // Change value if you want to read cards faster

  mfrc522.PICC_HaltA();
  mfrc522.PCD_StopCrypto1();
}