Read_data

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

#define RST_PIN 0          
#define SS_PIN  2         

MFRC522 mfrc522(SS_PIN, RST_PIN);   


void setup() 
{
  Serial.begin(9600);                                           
  SPI.begin();                                                  
  mfrc522.PCD_Init();                                              
  Serial.println(F("Entry Point:"));   
}


void loop() 
{
  MFRC522::MIFARE_Key key;
  for (byte i = 0; i < 6; i++) key.keyByte[i] = 0xFF;
  
  byte b;
  byte l;
  MFRC522::StatusCode status;
  
  if ( ! mfrc522.PICC_IsNewCardPresent()) {
    return;
  }

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

  Serial.println(F("**Product Entry:**"));

  Serial.print(F("ProductID: "));

  byte buffer1[18];

  b = 4;
  l = 18;
  
  //Product Name

  byte buffer2[18];
  b = 1;

  status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, 1, &key, &(mfrc522.uid)); //line 834
  if (status != MFRC522::STATUS_OK) {
    Serial.print(F("Authentication failed: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }

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

  //PRINT LAST NAME
  for (uint8_t i = 0; i < 16; i++) {
    Serial.write(buffer2[i] );
  }

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

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

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