RFID認証

rfid_auth.ino

#include <SPI.h>
#include <MFRC522.h>

#define RST_PIN         9
#define SS_PIN          10

MFRC522 mfrc522(SS_PIN, RST_PIN);

String s = "218146177180";
String temp = "";

/*
 * Initialize.
 */
void setup() {
    pinMode(7, OUTPUT);
    Serial.begin(9600);
    while (!Serial);
    SPI.begin();
    mfrc522.PCD_Init();
    Serial.println("Ready!");
}

void ok(){
  digitalWrite(7, HIGH);
  delay(700);
  digitalWrite(7, LOW);
  delay(100);
}

void ng(){
  digitalWrite(7, HIGH);
  delay(100);
  digitalWrite(7, LOW);
  delay(100);
  digitalWrite(7, HIGH);
  delay(100);
  digitalWrite(7, LOW);
  delay(100);
  digitalWrite(7, HIGH);
  delay(100);
  digitalWrite(7, LOW);
  delay(100);
}

/*
 * Main loop.
 */
void loop() {
    temp = "";
    // Look for new cards
    if ( ! mfrc522.PICC_IsNewCardPresent())
        return;

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

    for (byte i = 0; i < mfrc522.uid.size; i++) {
        temp += mfrc522.uid.uidByte[i];
        //Serial.print(mfrc522.uid.uidByte[i]);
    }
    
    if(s == temp){
        Serial.print("OK");
        ok();
    }else{
        Serial.print("NG");
        ng();
    }
    Serial.println();
    delay(1000);
}