rfid-rc522 Arduino uno

rfid-rc522.c

//https://www.hetpro-store.com/TUTORIALES/rc522-rfid-escritura-lectura
#include <SPI.h>
#include <MFRC522.h>

#define RST_PIN         9           // Pin configurable, puedes cambiarlo a tus necesidades
#define SS_PIN          10          // Pin configurable, puedes cambiarlo a tus necesidades

MFRC522 mfrc522(SS_PIN, RST_PIN);   // Crear instancia MFRC522

void setup() {
  Serial.begin(9600);        
  SPI.begin();               
  mfrc522.PCD_Init();        
  Serial.println(F("Escribir datos en MIFARE PICC "));
}

void loop() {

  // Preparar llave, todas las llaves son preconfiguradas de fabrica a FFFFFFFFFFFFh.
  MFRC522::MIFARE_Key key;
  for (byte i = 0; i < 6; i++) key.keyByte[i] = 0xFF;

  // Buscar por tarjetas nuevas
  if ( ! mfrc522.PICC_IsNewCardPresent()) {
    return;
  }

  // Seleccionar una de las tarjetas
  if ( ! mfrc522.PICC_ReadCardSerial()) {
    return;
  }

  Serial.print(F("Card UID:"));    //Vaciar UID
  for (byte i = 0; i < mfrc522.uid.size; i++) {
    Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
    Serial.print(mfrc522.uid.uidByte[i], HEX);
  }
  Serial.print(F(" PICC type: "));   // Vaciar PICC
  MFRC522::PICC_Type piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);
  Serial.println(mfrc522.PICC_GetTypeName(piccType));

  byte buffer[34];
  byte block;
  MFRC522::StatusCode status;
  byte len;

  Serial.setTimeout(20000L) ;     
  // Preguntar nombre de la familia
  Serial.println(F("Escribir nombre de familia, Finaliza con: #"));
  len = Serial.readBytesUntil('#', (char *) buffer, 30) ; // Leer nombre de familia
  for (byte i = len; i < 30; i++) buffer[i] = ' ';     // Espacios en blanco

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

  // Escribir un bloque
  status = mfrc522.MIFARE_Write(block, buffer, 16);
  if (status != MFRC522::STATUS_OK) {
    Serial.print(F("MIFARE_Write() falla: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }
  else Serial.println(F("MIFARE_Write() exitoso: "));

  block = 2;
  status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, block, &key, &(mfrc522.uid));
  if (status != MFRC522::STATUS_OK) {
    Serial.print(F("PCD_Authenticate() falla: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }
  
  // Escribir un bloque
  status = mfrc522.MIFARE_Write(block, &buffer[16], 16);
  if (status != MFRC522::STATUS_OK) {
    Serial.print(F("MIFARE_Write() falla: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }
  else Serial.println(F("MIFARE_Write() exitoso: "));

  // Preguntar por el primer nombre 
  Serial.println(F("Escriba primer nombre, terminar con #"));
  len = Serial.readBytesUntil('#', (char *) buffer, 20) ; // read first name from serial
  for (byte i = len; i < 20; i++) buffer[i] = ' ';     // pad with spaces

  block = 4;
  //Serial.println(F("Authenticating using key A..."));
  status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, block, &key, &(mfrc522.uid));
  if (status != MFRC522::STATUS_OK) {
    Serial.print(F("PCD_Authenticate() falla: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }

  // Write block
  status = mfrc522.MIFARE_Write(block, buffer, 16);
  if (status != MFRC522::STATUS_OK) {
    Serial.print(F("MIFARE_Write() falla: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }
  else Serial.println(F("MIFARE_Write() exitoso: "));

  block = 5;
  //Serial.println(F("Authenticating using key A..."));
  status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, block, &key, &(mfrc522.uid));
  if (status != MFRC522::STATUS_OK) {
    Serial.print(F("PCD_Authenticate() falla: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }

  // Write block
  status = mfrc522.MIFARE_Write(block, &buffer[16], 16);
  if (status != MFRC522::STATUS_OK) {
    Serial.print(F("MIFARE_Write() falla: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }
  else Serial.println(F("MIFARE_Write() exitoso: "));


  Serial.println(" ");
  mfrc522.PICC_HaltA(); 
  mfrc522.PCD_StopCrypto1();  

}