Arduino RC522 RFID Module

What you need:
1PCS Arduino UNO R3
1PCS USB Cable
1PCS RC522 RFID Module
7P Female to Male Dupont Cable





* ——————————————————————————————————————–

* Example sketch/program showing how to read data from a PICC to serial.

* ——————————————————————————————————————–

* This is a MFRC522 library example; for further details and other examples see:


* Example sketch/program showing how to read data from a PICC (that is: a RFID Tag or Card) using a MFRC522 based RFID

* Reader on the Arduino SPI interface.


* When the Arduino and the MFRC522 module are connected (see the pin layout below), load this sketch into Arduino IDE

* then verify/compile and upload it. To see the output: use Tools, Serial Monitor of the IDE (hit Ctrl+Shft+M). When

* you present a PICC (that is: a RFID Tag or Card) at reading distance of the MFRC522 Reader/PCD, the serial output

* will show the ID/UID, type and any data blocks it can read. Note: you may see “Timeout in communication” messages

* when removing the PICC from reading distance too early.


* If your reader supports it, this sketch/program will read all the PICCs presented (that is: multiple tag reading).

* So if you stack two or more PICCs on top of each other and present them to the reader, it will first output all

* details of the first and then the next PICC. Note that this may take some time as all data blocks are dumped, so

* keep the PICCs at reading distance until complete.


* @license Released into the public domain.


* Typical pin layout used:

* —————————————————————————————–

*             MFRC522      Arduino       Arduino   Arduino    Arduino          Arduino

*             Reader/PCD   Uno/101       Mega      Nano v3    Leonardo/Micro   Pro Micro

* Signal      Pin          Pin           Pin       Pin        Pin              Pin

* —————————————————————————————–

* RST/Reset   RST          9             5         D9         RESET/ICSP-5     RST

* SPI SS      SDA(SS)      10            53        D10        10               10

* SPI MOSI    MOSI         11 / ICSP-4   51        D11        ICSP-4           16

* SPI MISO    MISO         12 / ICSP-1   50        D12        ICSP-1           14

* SPI SCK     SCK          13 / ICSP-3   52        D13        ICSP-3           15



#include <SPI.h>

#include <MFRC522.h>


#define RST_PIN         9          // Configurable, see typical pin layout above

#define SS_PIN          10         // Configurable, see typical pin layout above


MFRC522 mfrc522(SS_PIN, RST_PIN);  // Create MFRC522 instance


void setup() {

Serial.begin(9600);      // Initialize serial communications with the PC

while (!Serial);         // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)

SPI.begin();             // Init SPI bus

mfrc522.PCD_Init();      // Init MFRC522

mfrc522.PCD_DumpVersionToSerial(); // Show details of PCD – MFRC522 Card Reader details

Serial.println(F(“Scan PICC to see UID, SAK, type, and data blocks…”));



void loop() {

// Look for new cards

if ( ! mfrc522.PICC_IsNewCardPresent()) {




// Select one of the cards

if ( ! mfrc522.PICC_ReadCardSerial()) {




// Dump debug info about the card; PICC_HaltA() is automatically called




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