jpnevulator.py

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An implementation of jpnevulator in Python

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# jpnevulator.py

This software is an implementation of the serial sniffing tool [jpnevulator][] in Python.
It aims to emulate the command line interface and the output of the original tool as much as possible:

$ jpnevulator.py --ascii --timing-print \
      --tty /dev/ttyS0:SB9600d \
      --tty "/dev/ttyUSB0:Motorola MTM800" \
      --read
    2015-08-30 13:23:49.461075: SB9600d
    00 00 05 3B 0D 00 00 05                         ...;....
    2015-08-30 13:23:49.461113: Motorola MTM800
    00 05 3B 0D 00 00 05 3B 0D                      ..;....;.
    2015-08-30 13:23:49.473074: SB9600d
    3B 0D 00 00 05 3B 0D                            ;....;.
    2015-08-30 13:23:49.473105: Motorola MTM800
    00 12 05 06 39 00 12 05 06 39 1F 00 22 80 00 0E ....9....9.."...
    $

### Differences from the original jpnevulator

Not all command line parameters and their functionality are implemented so far, but the most important ones are:

* `--read`
* `--tty NAME:ALIAS`
* `--timing-delta MICROSECONDS`
* `--timing-print`
* `--ascii`
* `--width WIDTH`

#### Additional features

One feature that is available in this Python implementation (and missing in the original tool) is controling the baudrates.
This is supported by adding them to the tty device name separated by an `@`:

jpnevulator.py --ascii --timing-print \
      --tty /dev/ttyUSB0@9600:SENDING \
      --tty /dev/ttyUSB1@9600:RECEIVING \
      --read

Alternatively, you could also set the baudrate for all of them with the argument `--baudrate BAUDRATE`.

#### Missing features

The following features were decided to be left out:

*  The `--alias-separator` parameter will not be implemented. Getting this to work with Python's ArgumentParser would be too complicated and doesn't seem to be worth the effort.

### Platform Independence

I had problems getting the original jpnevulator to work on Mac OS X. Thus, I wrote this platform independent replacement:
Python and the [PySerial][] package this software depends on are availabe for all major operating systems.

### Author

* Philipp Klaus  
  <philipp.l.klaus@web.de>

[jpnevulator]: http://jpnevulator.snarl.nl/
[PySerial]: http://pyserial.sourceforge.net/

jpnevulator.py

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