Added examples on how to write or read NDEF messages using nfccard-tool

[somq]

• Edited the readme to add explanations on how to use
• Added an example for reading and writing NDEF messages containg NDEF records (supported by the lib).
• Works partly with TT2 spec.

[chris-hinds]

Hi, trying to get this working myself locally, but getting errors on reading the card running this example.

Can you provide steps on how you got this work?

[somq]

What kind of errors do you get ?
What type of tag do you use ?
What type of NDEF message are you trying to read ?

git clone https://github.com/somq/nfc-pcsc.git
cd nfc-pcsc
npm i && npm run example-ndef

[chris-hinds]

Currently just trying to write a card and getting this error when I guess reading the header:

card detected { atr: <Buffer 3b 8f 80 01 80 4f 0c a0 00 00 03 06 03 00 03 00 00 00 00 68>,
  standard: 'TAG_ISO_14443_3',
  type: 'TAG_ISO_14443_3',
  uid: '043c513a003e80' }
error when reading data TypeError: Cannot read property 'getBytes' of undefined
    at NdefLibrary.NdefTextRecord.ndefTextRecord.assemblePayload (/Users/xxxxx/workspace/personal/nfc-pcsc/node_modules/ndef-lib/dist/ndeflibrary.js:1333:32)
    at NdefLibrary.NdefTextRecord.ndefTextRecord.setText (/Users/xxxxx/workspace/personal/nfc-pcsc/node_modules/ndef-lib/dist/ndeflibrary.js:1295:14)
    at nfcCardTool.prepareNDEFMessage (/Users/xxxxx/workspace/personal/nfc-pcsc/node_modules/nfccard-tool/lib/nfccard-tool.js:403:26)
    at nfcCardTool.prepareBytesToWrite (/Users/xxxxx/workspace/personal/nfc-pcsc/node_modules/nfccard-tool/lib/nfccard-tool.js:468:28)
    at ACR122Reader.<anonymous> (/Users/xxxxx/workspace/personal/nfc-pcsc/examples/ndef.js:50:36)
    at Generator.next (<anonymous>)
    at step (/Users/xxxxx/workspace/personal/nfc-pcsc/examples/ndef.js:16:191)
    at /Users/xxxxx/workspace/personal/nfc-pcsc/examples/ndef.js:16:361
    at <anonymous>

[somq]

You are getting this error because you are trying to write/read a type 3 tag, which is not implemented yet in this library (it only supports type 2 tags for now).
Here are the docs with tech specs to understand the difference: https://github.com/somq/nfccard-tool/tree/master/docs

Feel free to fork and push a PR...

[XavierMallat]

I don't have any problem with type 3 tag :

ACS ACR122U PICC Interface 0  device attached
card detected {atr: Uint8Array(20), standard: "TAG_ISO_14443_3", type: "TAG_ISO_14443_3", uid: "04064ab2824981"}
tag info: {"headerValues":{"raw":{"Lock":{"LOCK0":0,"LOCK1":0},"capabilityContainer":{"MAGIC_NUMBER":225,"SPEC_VERSION":16,"MAX_NDEF_LENGTH":109,"READ_ACCESS":0,"WRITE_ACCESS":0},"NDEFMessageHeader":{"HAS_NDEF":3,"MESSAGE_LENGTH":79}},"string":{"Lock":{"LOCK0":"0","LOCK1":"0"},"capabilityContainer":{"MAGIC_NUMBER":"E1","SPEC_VERSION":"10","MAX_NDEF_LENGTH":"6D","READ_ACCESS":"0","WRITE_ACCESS":"0"},"NDEFMessageHeader":{"HAS_NDEF":"3","MESSAGE_LENGTH":"4F"}}},"parsedHeader":{"isFormatedAsNDEF":true,"type2SpecVersion":"1.0","maxNDEFMessageSize":872,"hasReadPermissions":true,"getReadPermissionsType":"HAS_READ_ACCESS","hasWritePermissions":true,"writePermissionsType":"HAS_WRITE_ACCESS","hasNDEFMessage":true,"NDEFMessageLength":79,"lengthToReadFromBlock4":81}}
NDEFMessage: (3) [{…}, {…}, {…}]

Your code works perfectly ! Nice lib and PR !

[somq]

Thanks @XavierMallat
Too bad this PR has not been merged yet so...

[somq]

@pokusew Will you review this one at one point ?

[SuneethaYamani]

I am trying to use this code.but i am getting error
error when reading data { ReadError: Read operation failed: Status code: 0x6300
at ACR122Reader.read (\nfc-pcsc\src/Reader.js:554:10) name: 'ReadError', code: 'operation_failed' }
error when reading data { ReadError: Read operation failed: Status code: 0x6300
at ACR122Reader.read \nfc-pcsc\src/Reader.js:554:10) name: 'ReadError', code: 'operation_failed' }

[matrad]

@pokusew any reason why this PR is still open? It seems to be finished?

[hasanbasri1993]

I am trying to use this code.but i am getting error error when reading data { ReadError: Read operation failed: Status code: 0x6300 at ACR122Reader.read (\nfc-pcsc\src/Reader.js:554:10) name: 'ReadError', code: 'operation_failed' } error when reading data { ReadError: Read operation failed: Status code: 0x6300 at ACR122Reader.read \nfc-pcsc\src/Reader.js:554:10) name: 'ReadError', code: 'operation_failed' }

same issue, have u get solution ?

[somq]

@hasanbasri1993 Your error is related to the reader as far as I can understand
Maybe your hardware or driver has some issue?