Data Firmware

Arduino Uno RFID RC522 MFRC522 library example DumpInfo

This post show how Arduino Uno + RFID-RC522 (RFID reader) to dump info of RFID key and RFID card, using Arduino RFID Library for MFRC522.

Arduino library for MFRC522 and other RFID RC522 based modules (https://github.com/miguelbalboa/rfid) read and write different types of Radio-Frequency IDentification (RFID) cards on your Arduino using a RC522 based reader connected via the Serial Peripheral Interface (SPI) interface.

Install MFRC522 library to Arduino IDE:

You can download ZIP file from the library web page, and it to Arduino library, read the video below. After library added, it will be in the folder your_DocumentsArduinolibraries,


and fritzing parts is in your_DocumentsArduinolibraries fid-masterdocfritzing.


Connect Arduino Uno and RFID-RF522 module:


In Arduino IDE, Open Example of DumpInfo in MFRC522:

/*
 * ----------------------------------------------------------------------------
 * This is a MFRC522 library example; see https://github.com/miguelbalboa/rfid
 * for further details and other examples.
 * 
 * NOTE: The library file MFRC522.h has a lot of useful info. Please read it.
 * 
 * Released into the public domain.
 * ----------------------------------------------------------------------------
 * 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.
 * 
 * Typical pin layout used:
 * -----------------------------------------------------------------------------------------
 * MFRC522 Arduino Arduino Arduino Arduino Arduino
 * Reader/PCD Uno 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 // 
#define SS_PIN 10 //

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
 ShowReaderDetails(); // Show details of PCD - MFRC522 Card Reader details
 Serial.println(F("Scan PICC to see UID, type, and data blocks..."));
}

void loop() {
 // Look for new cards
 if ( ! mfrc522.PICC_IsNewCardPresent()) {
 return;
 }

 // Select one of the cards
 if ( ! mfrc522.PICC_ReadCardSerial()) {
 return;
 }

 // Dump debug info about the card; PICC_HaltA() is automatically called
 mfrc522.PICC_DumpToSerial(&(mfrc522.uid));
}

void ShowReaderDetails() {
 // Get the MFRC522 software version
 byte v = mfrc522.PCD_ReadRegister(mfrc522.VersionReg);
 Serial.print(F("MFRC522 Software Version: 0x"));
 Serial.print(v, HEX);
 if (v == 0x91)
 Serial.print(F(" = v1.0"));
 else if (v == 0x92)
 Serial.print(F(" = v2.0"));
 else
 Serial.print(F(" (unknown)"));
 Serial.println("");
 // When 0x00 or 0xFF is returned, communication probably failed
 if ((v == 0x00) || (v == 0xFF)) {
 Serial.println(F("WARNING: Communication failure, is the MFRC522 properly connected?"));
 }
}

---

- Similarly example run on Android: Android NFC: readBlock() for MifareClassic, to dump data in RFID tag
- Step-by-step to make MFRC522-python work on Raspberry Pi 2/raspbian Jessie, read RFID tags using RFID Reader, RFID-RC522.
- Raspberry Pi 2 + MFRC522-python - Dump RFID Tag data using mxgxw/MFRC522-python

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