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revtel / react-native-nfc-manager

React Native NFC module for Android & iOS
MIT License
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format is not working #143

Closed panmissl closed 4 years ago

panmissl commented 5 years ago

Hi, I am using your library and found an issue: format is not working. I got this error: image

"fail to apply ndef formatable tech."

I have tried several apps but only "Nfc tools" can format nfc tag.

could you give some advise or fix this issue?

Thanks

whitedogg13 commented 5 years ago

Hi @panmissl the error message means that the tag you try to format doesn't have a NdefFormatable tech in it.

You should inspect the tag object obtained by registerTagEvent to see all available NFC technologies, and only use certain NFC tech when it's appliable.

panmissl commented 5 years ago

Hi @panmissl the error message means that the tag you try to format doesn't have a NdefFormatable tech in it.

You should inspect the tag object obtained by registerTagEvent to see all available NFC technologies, and only use certain NFC tech when it's appliable.

Hi whitedogg, I am still confused about this: If the error message means that the tag doesn't have a NdefFormatable tech in it, then how can the "Nfc tools" format it successfully?

Also, when I use "Nfc tools" erase it, the tag shows it support "NfcA" and "MifareUltralight" techs, now any tools and you library CAN"T read or write the tag; And then I use "Nfc tools" format it, the tag shows it support "NfcA", "MifareUltralight", and "Ndef" techs, so I can use your library to read and write it for now.

whitedogg13 commented 5 years ago

Hi @panmissl , sorry for pending so long.

My guess is that the Nfc tools app implements the NDEF formatting in lower level: they probably send raw commands directly to the tag, rather than depends on this Android API.

In our library, we depends on Android to do the formatting for us, and it can only do this when NdefFormatable tech is included in the tag event.

Of cause, this library can send raw commands to do formatting as well (via the NfcManager.transceive), but this requires us to understand the raw NFC commands and protocols. For most app developers like us, it won't be the case, but for an app like Nfc tools, this should be their know-how.

Hope that makes sense!

whitedogg13 commented 4 years ago

close inactive issue

paichato commented 2 years ago

Update to the latest version @3.13.0 and try again.

Hi @panmissl the error message means that the tag you try to format doesn't have a NdefFormatable tech in it. You should inspect the tag object obtained by registerTagEvent to see all available NFC technologies, and only use certain NFC tech when it's appliable.

Hi whitedogg, I am still confused about this: If the error message means that the tag doesn't have a NdefFormatable tech in it, then how can the "Nfc tools" format it successfully?

Also, when I use "Nfc tools" erase it, the tag shows it support "NfcA" and "MifareUltralight" techs, now any tools and you library CAN"T read or write the tag; And then I use "Nfc tools" format it, the tag shows it support "NfcA", "MifareUltralight", and "Ndef" techs, so I can use your library to read and write it for now.