Getting signature id

[moein-keyvani-pur]

I have a problem with getting the Signature id of an NFC card and I didn't find any solution yet, Could you please guide me to solve this problem?

_checkNFC() async {
var availability = await FlutterNfcKit.nfcAvailability;
if (availability == NFCAvailability.available) {
var tag = await FlutterNfcKit.poll(timeout: const Duration(seconds: 10));
// here i want getting card's signature
} else {
await OpenSettings.openNFCSetting();
}
}

[dangfan]

Unfortunately, a card may follow any specification. There is no universal reading method. You have to know what kind of card you're dealing with, and the protocol to read the corresponding data.