rfid2.ino

///////////////////
int getID() {
  // Getting ready for Reading PICCs
  if ( ! mfrc522.PICC_IsNewCardPresent()) { //If a new PICC placed to RFID reader continue
    return 0;
  }
  if ( ! mfrc522.PICC_ReadCardSerial()) { //Since a PICC placed get Serial and continue
    return 0;
  }
  // There are Mifare PICCs which have 4 byte or 7 byte UID care if you use 7 byte PICC
  // I think we should assume every PICC as they have 4 byte UID
  // Until we support 7 byte PICCs

  Serial.println("Scanning PICC's UID.........");
  //delay(2000);
  for (int i = 0; i < mfrc522.uid.size; i++) {  //
    readCard[i] = mfrc522.uid.uidByte[i];
    Serial.print(readCard[i], HEX);
  }
  Serial.println("");
  mfrc522.PICC_HaltA(); // Stop reading
  return 1;
}

String readRFID() {

  do {
    successRead = getID(); // sets successRead to 1 when we get read from reader otherwise 0
    Serial.println("no card");
    //if (programMode) {
    // Program Mode cycles through RGB waiting to read a new card
    //}
    //else {
    //}
  }
  while (!successRead); //the program will not go further while you not get a successful read
  if (successRead)
  {
    successRead = 0;
    String content = "";
    byte letter;
    for ( byte i = 0; i < mfrc522.uid.size; i++ ) {
      content.concat(String(readCard[i], HEX));
    }
    content.toUpperCase();
    funLCDprint("Card Read", 0, 0, 0, 1);
    funLCDprint(content, 0, 1, 1000, 0);
    mfrc522.PICC_HaltA();
    mfrc522.PCD_StopCrypto1();
    return content;
  }


}