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// RFID reader for Arduino

// Wiring version by BARRAGAN <http://people.interaction-ivrea.it/h.barragan>

// Modified for Arudino by djmatic

//修改by Wayjay

 

int val = 0;

char code[10];

int bytesread = 0;

 

void setup() {

 

Serial.begin(2400); // 將Serial RX pin(digital 0) 設為2400bps

pinMode(2,OUTPUT); // 將digital pin 2設為輸出，以便傳送訊號給RFID reader

}

 

 void loop() {

 digitalWrite(0, LOW);                  // 啟動RFID reader

 if(Serial.available() > 0) {          // 假如reader有資料讀入

    if((val = Serial.read()) == 10) {   // 檢查標頭是否為10

      bytesread = 0;

      while(bytesread<10) {             

        if( Serial.available() > 0) {

          val = Serial.read();

          if((val == 10)||(val == 13)) { //假如讀到表示標頭的10或結束的13           

            break;                       // 停止讀取

          }

          code[bytesread] = val;         //紀錄讀入的值          

          bytesread++;                   //準備讀取下一個位元 

        }

      }

      if(bytesread == 10) {              // 如果十個號碼皆讀取成功

        Serial.print("TAG code is: ");  

        Serial.println(code);            // 顯示TAG號碼

      }

      bytesread = 0;

      digitalWrite(0, HIGH);             // 關閉RFID reader

      delay(500);                     

    }

 }

}

先開啟Serial Monitor