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PN532/examples/emulate_tag_ndef/emulate_tag_ndef.ino 1.48 KB
1a2e5ee4   henyxia   Big revision
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  #include "SPI.h"
  #include "PN532_SPI.h"
  #include "emulatetag.h"
  #include "NdefMessage.h"
  
  PN532_SPI pn532spi(SPI, 10);
  EmulateTag nfc(pn532spi);
  
  uint8_t ndefBuf[120];
  NdefMessage message;
  int messageSize;
  
  uint8_t uid[3] = { 0x12, 0x34, 0x56 };
  
  void setup()
  {
    Serial.begin(115200);
    Serial.println("------- Emulate Tag --------");
    
    message = NdefMessage();
    message.addUriRecord("http://www.seeedstudio.com");
    messageSize = message.getEncodedSize();
    if (messageSize > sizeof(ndefBuf)) {
        Serial.println("ndefBuf is too small");
        while (1) { }
    }
    
    Serial.print("Ndef encoded message size: ");
    Serial.println(messageSize);
  
    message.encode(ndefBuf);
    
    // comment out this command for no ndef message
    nfc.setNdefFile(ndefBuf, messageSize);
    
    // uid must be 3 bytes!
    nfc.setUid(uid);
    
    nfc.init();
  }
  
  void loop(){
      // uncomment for overriding ndef in case a write to this tag occured
      //nfc.setNdefFile(ndefBuf, messageSize); 
      
      // start emulation (blocks)
      nfc.emulate();
          
      // or start emulation with timeout
      /*if(!nfc.emulate(1000)){ // timeout 1 second
        Serial.println("timed out");
      }*/
      
      // deny writing to the tag
      // nfc.setTagWriteable(false);
      
      if(nfc.writeOccured()){
         Serial.println("\nWrite occured !");
         uint8_t* tag_buf;
         uint16_t length;
         
         nfc.getContent(&tag_buf, &length);
         NdefMessage msg = NdefMessage(tag_buf, length);
         msg.print();
      }
  
      delay(1000);
  }