emulate_tag_ndef.ino
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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);
}