pair-tag
xod-dev/pn532-nfc/pair-tag
Pairs module with an NFC tag and reads the UID
pair-tag
@/pair-tag
Pairs module with an NFC tag and reads the UID
DEV@/pn532-device
PAIRpulse
Triggers pairing with an NFC tag
NApulse
Fires if there is no NFC tag
OKpulse
Fires on successful pairing
UID@/nfc-uid
The UID of the paired NFC tag
C++ implementation
#pragma XOD evaluate_on_pin disable
#pragma XOD evaluate_on_pin enable input_PAIR
node {
void evaluate(Context ctx) {
if (!isInputDirty<input_PAIR>(ctx))
return;
auto nfc = getValue<input_DEV>(ctx);
uint8_t uidLength;
uint8_t readedUid[12];
bool res = nfc->readPassiveTargetID(PN532_MIFARE_ISO14443A, readedUid, &uidLength);
if (res) {
typeof_UID uid;
memset(readedUid + uidLength, 0, 12 - uidLength);
memcpy(uid.items, readedUid, 7);
emitValue<output_UID>(ctx, uid);
emitValue<output_OK>(ctx, 1);
} else {
emitValue<output_UID>(ctx, remove_pointer<typeof_UID>::type::empty());
emitValue<output_NA>(ctx, 1);
}
}
}