Release v0.2 – January 7th, 2020
The ndef modules provides methods for encoding and decoding messages and records in the NDEF format according to NFC Forum technical specification. Its main purpose is to provide comprehensive verification of raw NDEF messages. It can be used to verify messages before writing them to an actual tag.
Available on PyPI.
Usage
Valid Message
>>> import ndef
>>> message_data = 'D1010F5402656E48656C6C6F20776F726C6421'.decode('hex')
>>> message = ndef.NdefMessage(message_data)
>>> record = message.records[0]
>>> record.tnf
1
>>> record.type
'T'
>>> record.id
>>> record.payload
'\x02enHello world!'
>>>
Invalid Message
>>> import ndef
>>> message_data = '9901050155610123456761'.decode('hex')
>>> message = ndef.NdefMessage(message_data)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "ndef\ndef.py", line 274, in __init__
self.verify()
File "ndef\ndef.py", line 278, in verify
self._verify_begin_end()
File "ndef\ndef.py", line 296, in _verify_begin_end
raise InvalidNdefMessage("last record's ME flag is off")
ndef.ndef.InvalidNdefMessage: last record's ME flag is off
>>>
Create Message
>>> import ndef
>>> text_record = (ndef.TNF_WELL_KNOWN, ndef.RTD_TEXT, 'id', 'hello world')
>>> text_message = ndef.new_message(text_record)
>>> text_raw_ndef = text_message.to_buffer()
>>> text_raw_ndef.encode('hex')
'd9010b0254696468656c6c6f20776f726c64'
>>>
Alternatives
nfcpy: full implementation of spec including actual communication code
Python NDEF library and tools: aimed at security research
pynfc: pythonic interface for the libnfc library
License
Copyright (c) 2014 Amir Szekely This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software. Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 3. This notice may not be removed or altered from any source distribution.
1 maintainer
Release files for ndef 0.2
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Source distribution (sdist)
| File | Size | Uploaded | |
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| ndef-0.2.tar.gz | 5.7 kB | Details |
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| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| ndef-0.2-py2.py3-none-any.whl | Python 3, Python 2 | none | any | Details |
Total release size: 12.4 kB
Release files / ndef-0.2.tar.gz
| Download URL | ndef-0.2.tar.gz |
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| Size | 5.7 kB |
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Release files / ndef-0.2-py2.py3-none-any.whl
| Download URL | ndef-0.2-py2.py3-none-any.whl |
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| Size | 6.7 kB |
| Tags | Python 2 Python 3 |
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