Format and Write NDEF in one Step

[meisterm]

Hi, is it possible to Format to NDEF and Write NDEF Record in one Step or do i need to rescan the tag for the second operation?

[robingenz]

You can do that in "one step", e.g.:

import { Nfc, NfcUtils, NfcTagTechType } from '@capawesome-team/capacitor-nfc';

const createNdefTextRecord = () => {
  const utils = new NfcUtils();
  const { record } = utils.createNdefTextRecord({ text: 'Capacitor NFC Plugin' });
  return record;
};

const formatAndWrite = async () => {
	const record = createNdefTextRecord();
	return new Promise((resolve) => {
		Nfc.addListener('nfcTagScanned', async (event) => {
			await Nfc.format();
			await Nfc.write({ message: { records: [record] } });
			await Nfc.stopScanSession();
			resolve();
		});
		Nfc.startScanSession();
	});
};

[meisterm]

That's what I tried but without success. The following happens in Console:

ticket-swap:249 native Nfc.startScanSession (#81836919)
ticket-swap:223 result Nfc.startScanSession (#81836919)
ticket-swap:223 result Nfc.addListener (#81836902)
main.js:1 nfcTagScanned {event: {…}}
68.js:1 nfc tag scanned in state personal-write-nfc
68.js:1 Change State personal-write-nfc -> write-nfc
68.js:1 Change Display scan-nfc -> write-nfc
ticket-swap:249 native Nfc.format (#81836920)
ticket-swap:249 native Nfc.isSupported (#81836921)
ticket-swap:223 result Nfc.format (#81836920)
ticket-swap:249 native Nfc.write (#81836922)
ticket-swap:223 result Nfc.isSupported (#81836921)
ticket-swap:249 native Nfc.isEnabled (#81836923)
ticket-swap:223 result Nfc.write (#81836922)
ticket-swap:231 {message: 'The NFC tag has not yet been formatted as NDEF.'}
(anonym) @ ticket-swap:231
returnResult @ ticket-swap:753
win.androidBridge.onmessage @ ticket-swap:741
68.js:1 Error: The NFC tag has not yet been formatted as NDEF.
at returnResult (ticket-swap:766:32)
at win.androidBridge.onmessage (ticket-swap:741:21)
ticket-swap:223 result Nfc.isEnabled (#81836923)
ticket-swap:249 native Nfc.stopScanSession (#81836924)
ticket-swap:223 result Nfc.stopScanSession (#81836924)

[meisterm]

I use a NXP Mifare Classic 1K Chip.
When I run the fromat command and then re-attach the Tag and do the write command, everything works fine.
This only happens, when the Tag has been formatted/cleared with NFC Tools or when the Tag is factory-new. Then the NDEF formatting has to be done. So unfortunately I have to write the Tag in Two Steps, when it's new.
Could it possible that the format Method returns to early, when the chip is not yet ready to write the tag? Or perhaps the information about the NDEF formatting is not refreshed after formatting the tag, so the write Method thinks, that the tag isn't formatted?

[robingenz]

I will order this tag and try to reproduce your issue.

Could it possible that the format Method returns to early, when the chip is not yet ready to write the tag? Or perhaps the information about the NDEF formatting is not refreshed after formatting the tag, so the write Method thinks, that the tag isn't formatted?

No, the call will be resolved as soon as the android system notifies that everything is ready.
Have you tried a short timeout of e.g. 100ms? That should allow you to test it.

[easpinall]

I can confirm that we are experiencing the exact same problem @meisterm got while also making use of a NXP Mifare Classic 1K Chip running the exact same code as in #17 (comment)

[robingenz]

Alright, I just received the tag and will give it a try as soon as I am back home (currently on vacation).

[robingenz]

Sorry for my late response! I just tried to reproduce this issue with this tag (Mifare Classic 1K) but without success. It works for me as described here without any problems.

Unfortunately, I can't debug the problem without a reproducible example.