알찬 아두이노 키트(입문자용) 의 

 RFID-RC522로 받은 데이터를 화면에 출력하는 예제

 연결

 Arduino UNO RFID-RC522

 -------------------------------------------------

 10 SPI SS SDA

 13 SPI SCK SCK

 11 SPI MOSI MOSI

 12 SPI MISO MISO

 9 SPI RESET RST 

*/

#include

#include

#define RST_PIN 9 // 

#define SS_PIN 10 //

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

void setup() {

 Serial.begin(115200);

 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?"));

 }

}