Page 161 - 최강 아두이노 퍼스트 참고서

#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
SPI.begin(); // Init SPI bus mfrc522.PCD_Init(); // Init MFRC522

ShowReaderDetails(); // Show details of PCD - MFRC522 Card Reader details

Serial.println("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("MFRC522 Software Version: 0x");
Serial.print(v, HEX); if (v == 0x91)

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