RFID Reader am Arduino

Anschluss des RFID-RC522 an den Arduino

zum Anschluss des RFID-RC522 RFID Moduls an ein Arduino Board werden die 5 I/Os benötigt, die SPI I/Os SS;SCK;MOSI MISO und ein Rest Pin.

RFID-RC522 Schaltplan

Programm für den Arduino

Das Arduino Programm initialisiert das RFID Modul und gibt Information des RFID Chip über die serielle Schnittstelle aus.

<syntaxhighlight lang="Arduino">

/*

* -----------------------------------------------------------------------------
* 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: https://github.com/miguelbalboa/rfid
* 
* 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
*/

1. include <SPI.h>
2. include <MFRC522.h>

1. define RST_PIN 9 // Configurable, see typical pin layout above
2. 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()) { 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)); }