TesteRCB

String CPF = "";
char buffer[]={0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x30,0x31,0x20,0x20,0x20,0x20,0x20,0x20,0x20};
//----------------------
void setup()
{
  Serial.begin(9600);
}
//----------------------
void loop()
{
  for (byte i = 0; i < 16; i++)
  {
    //Serial.print(char(buffer[i])); //Mostra os dados do cartão RFID via serial
    CPF += char(buffer[i]);

  }
   Serial.println(CPF);
   delay(300);
   CPF = "";
}