CODEWITHSUNDEEP
androidreact-nativenfcreadwritelock
AnAndHu S
AnAndHu S

Reputation: 11

Write lock Ntag 424DNA using makeReadOnly() throwing failed error

Creating react native NFC read/write application using https://github.com/whitedogg13/react-native-nfc-manager ->with this plugin. But I was not able to write lock after writing a NDEF record to tag.

try{
await NfcManager.writeNdefMessage(bytes)
        .then(()=>NfcManager.makeReadOnlyAndroid())//Write_lock android
        .then((result)=>{
          console.log("Make read Only result:->",result);
        });
}
catch (ex) {
      console.warn('exception', ex);
      _cleanUp();
     
    }

NDEF record was written successfully, but write lock was failed. Given below is tag Info which used.

{
   "canMakeReadOnly":false,
   "id":"043743CE80",
   "isWritable":true,
   "maxSize":254,
   "ndefMessage":[],
   "techTypes":[
      "android.nfc.tech.IsoDep",
      "android.nfc.tech.NfcA",
      "android.nfc.tech.Ndef"
   ],
   "type":"NFC Forum Type 4"
}

The same tag is write lockable with NXP "TagWritter" android mobile application.

Is their any way to use transceive() method to lock/change particular "lock-bit" or to fire-up some custom commands for NFC write locking.

Upvotes: 1

Views: 513

Answers (1)

Andrew
Andrew

Reputation: 10162

Are you sure that is the right way to makeReadOnly with this library see https://github.com/whitedogg13/react-native-nfc-manager/issues/66 for examples

Yes you should be able transceive a ISOUpdateBinary command direct to the Capability Container (CC) file to write to this standard file.

Detail are in the datasheet for the chip https://www.nxp.com/docs/en/data-sheet/NT4H2421Gx.pdf with more details in the NFC Type 4 Spec http://apps4android.org/nfc-specifications/NFCForum-TS-Type-4-Tag_2.0.pdf

But that is a lot of work when you could just call the native method of https://developer.android.com/reference/android/nfc/tech/Ndef#makeReadOnly()

(which is what the library is doing)

Upvotes: 0

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