[Arduino範例] RFID RC522辨識系統入門，讀取UID和比對
最新程式(2021/1223)
#define SS_PIN 10 //RC522 NSS 連接 Arduino pin 10
#define RST_PIN 9 //RC522 RST 連接 Arduino pin 9
#define LED_G 5 //綠色 LED 長腳連接 Arduino pin 5
#define LED_R 4 //紅色LED 長腳連接 Arduino pin 4
#define BUZZER 2 //蜂鳴器正極 連接 Arduino pin 2
MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance.
Servo myServo; //define servo name
void setup()
{
Serial.begin(9600); // Initiate a serial communication
SPI.begin(); // Initiate SPI bus
mfrc522.PCD_Init(); // Initiate MFRC522
myServo.attach(3); // 伺服馬達黃線 連接 Arduino pin 3
myServo.write(0); //servo start position
pinMode(LED_G, OUTPUT);
pinMode(LED_R, OUTPUT);
pinMode(BUZZER, OUTPUT);
noTone(BUZZER);
Serial.println("Put your card to the reader...");
Serial.println();
}
void loop()
{
// Look for new cards
if ( ! mfrc522.PICC_IsNewCardPresent())
{
return;
}
// Select one of the cards
if ( ! mfrc522.PICC_ReadCardSerial())
{
return;
}
//Show UID on serial monitor
Serial.print("UID tag :");
String content= "";
byte letter;
for (byte i = 0; i < mfrc522.uid.size; i++)
{
Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
Serial.print(mfrc522.uid.uidByte[i], HEX);
content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "));
content.concat(String(mfrc522.uid.uidByte[i], HEX));
}
Serial.println();
Serial.print("Message : ");
content.toUpperCase();
//if (content.substring(1) == "1A 4E 60 19") //old
if (content.substring(1) == "D7 97 26 E0") //在此鍵入讓房門打開的 IC 卡片 ID 碼
{
//Serial.println("Authorized access"); //old。
Serial.println("芝麻開門"); //如果感應模組讀到正確的 ID，則綠燈亮，何服馬達轉動，打開房門。
Serial.println();
delay(500);
digitalWrite(LED_G, HIGH);
tone(BUZZER, 500);
delay(300);
noTone(BUZZER);
myServo.write(180);
delay(5000);
myServo.write(0);
digitalWrite(LED_G, LOW);
}
else {
//Serial.println(" Access denied");//old。
Serial.println("你是陌生人"); //如果感應模組讀到非設定好的ID，則紅燈亮，伺服馬達不轉動，房門依舊所著。
digitalWrite(LED_R, HIGH);
tone(BUZZER, 300);
delay(1000);
digitalWrite(LED_R, LOW);
noTone(BUZZER);
}
}
