read-page
xod-dev/pn532-nfc/read-page
Reads one page of a Mifare Ultralight NFC tag.
To read data from a tag it should be paired first (use `pair-tag`)
Possible errors:
— Can't read the value
read-page
@/read-page
Reads one page of a Mifare Ultralight NFC tag.
To read data from a tag it should be paired first (use `pair-tag`)
Possible errors:
— Can't read the value
DEV@/pn532-device
PAGEnumber
A page number to read data from in range [0, 16]. Notice that first pages contains UID
READpulse
Trigger reading from an NFC tag
OKpulse
Fires on successful reading
OUT4byte
OUT3byte
OUT2byte
OUT1byte
C++ implementation
#pragma XOD evaluate_on_pin disable
#pragma XOD evaluate_on_pin enable input_READ
#pragma XOD error_raise enable
node {
void evaluate(Context ctx) {
if (!isInputDirty<input_READ>(ctx))
return;
auto nfc = getValue<input_DEV>(ctx);
uint8_t page = (uint8_t)getValue<input_PAGE>(ctx);
uint8_t data[4];
uint8_t success = nfc->mifareultralight_ReadPage(page, data);
if (success) {
emitValue<output_OUT1>(ctx, data[0]);
emitValue<output_OUT2>(ctx, data[1]);
emitValue<output_OUT3>(ctx, data[2]);
emitValue<output_OUT4>(ctx, data[3]);
emitValue<output_OK>(ctx, 1);
} else {
raiseError(ctx);
}
}
}