rfid_multi_tag_leitor

// O sistema faz a luz apagar e envia uma mensagem para o serial quando o tag é afastado.
// Agradecimentos a Nelson Toshio Hirai e Rhaicmer Braulio da Costa do Labdegaragem
#include <SPI.h>
#include <MFRC522.h>

#define SS_PIN1 8
#define SS_PIN2 10
#define RST_PIN 9
MFRC522 mfrc522_1(SS_PIN1, RST_PIN); // Create MFRC522_2 instance.
MFRC522 mfrc522_2(SS_PIN2, RST_PIN); // Cria MFRC522 instance.
int ledpin7 = 7;
int ledpin5 = 5;
char st[20];
byte State = 0;

void setup()
{
  Serial.begin(9600);
  SPI.begin(); // Inicia SPI bus
  mfrc522_1.PCD_Init(); // Inicia MFRC522_1
  mfrc522_2.PCD_Init(); // Inicia MFRC522_2
  pinMode (ledpin7 , OUTPUT);
  pinMode (ledpin5 , OUTPUT);
}
void loop()
{
  Tag1();
  Tag2();
}
void Tag1()
{
  // Se o ledpin7 estiver acesso envia print "y"
  if( digitalRead(ledpin5) == HIGH )
  {    Serial.println("y");
       delay(2000);}


  // Select one of the cards

  if ( ! mfrc522_1.PICC_ReadCardSerial())

  // Look for new cards
  if ( ! mfrc522_1.PICC_IsNewCardPresent())
  {     //Acende o ledpin5
        digitalWrite (ledpin5 , HIGH);
        return ;

  }

  //Serial.print("UID da tag :");
  String conteudo= "";
  byte letra;
  for (byte i = 0; i < mfrc522_1.uid.size; i++)
  {
    //Serial.print(mfrc522_1.uid.uidByte[i] < 0x10 ? " 0" : " ");
    //Serial.print(mfrc522_1.uid.uidByte[i], HEX);
    conteudo.concat(String(mfrc522_1.uid.uidByte[i] < 0x10 ? " 0" : " "));
    conteudo.concat(String(mfrc522_1.uid.uidByte[i], HEX));
  }
  conteudo.toUpperCase();
  if (conteudo.substring(1) == "E3 F5 31 DB") //UID 1 - Chaveiro
  {
    digitalWrite (ledpin5 , LOW);
    //Serial.println("standby");
  }

    delay(500);
}

void Tag2()
{
  // Se o ledpin7 estiver acesso envia print "K"
  if( digitalRead(ledpin7) == HIGH )
  {    Serial.println("k");
       delay(2000);}


  // Select one of the cards

  if ( ! mfrc522_2.PICC_ReadCardSerial())

  // Look for new cards
  if ( ! mfrc522_2.PICC_IsNewCardPresent())
  {     //Acende o ledpin7
        digitalWrite (ledpin7 , HIGH);
        return ;

  }

  //Serial.print("UID da tag :");
  String conteudo= "";
  byte letra;
  for (byte i = 0; i < mfrc522_2.uid.size; i++)
  {
    //Serial.print(mfrc522_2.uid.uidByte[i] < 0x10 ? " 0" : " ");
    //Serial.print(mfrc522_2.uid.uidByte[i], HEX);
    conteudo.concat(String(mfrc522_2.uid.uidByte[i] < 0x10 ? " 0" : " "));
    conteudo.concat(String(mfrc522_2.uid.uidByte[i], HEX));
  }
  conteudo.toUpperCase();
  if (conteudo.substring(1) == "53 0A 6D D9") //UID 1 - Chaveiro
  {
    digitalWrite (ledpin7 , LOW);
    //Serial.println("standby");
  }

    delay(500);
}