RFID

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RFID

本文采用RFID-RC522

参数

VCC 模块供电3.3V
GND 接地

接线

SDA–10
SCK–13
MOSI–11
MISO–12
RST–9

代码

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

MFRC522 rfid(10, 9);
String item;

String MFRC522_ReadCardUID(MFRC522 *_name){
  String _CardUID = "";
  for (byte _i = 0; _i < _name->uid.size; _i++){
    if(_name->uid.uidByte[_i] < 0x10)
      _CardUID += "0";
    _CardUID += String(_name->uid.uidByte[_i], HEX);
  }
  return _CardUID;
}

boolean MFRC522_IsNewCard(MFRC522 *_name){
  if(!_name->PICC_IsNewCardPresent())
    return false;
  if(!_name->PICC_ReadCardSerial())
    return false;
  return true;
}

void setup(){
  Serial.begin(9600);
  SPI.begin();
  rfid.PCD_Init();
  item = "";
}

void loop(){
  if(MFRC522_IsNewCard(&rfid)){
    item = MFRC522_ReadCardUID(&rfid);
    Serial.println(item);
    delay(500);
    rfid.PICC_HaltA();
    rfid.PCD_StopCrypto1();
  }

}

功能

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