I'm not sure what the question is here. It looks like you need to write a COBS encoder / decoder in Python, maybe using your .NET code as a model. Then you can integrate that with comms code taken from miniterm. What help do you need?
Kent Michael Cotherman wrote: > Hello, I am really new to python and really have not > programmed much since college, I played with it a > little now, and it seems to be a tool I feel > comfortable implementing a personal project in. > > I wish to communicate via a serial port to a device > that is using COBS. I wish to configure it and then > receive data at an interval and store it in a rrd. > The device itself receives telemetry information from > other devices, and this telemetry info is going to get > graphed and made available via a web page. > > The serial port will be com or tty, for which I > prepped by playing with pygarmin and miniterm. The > device is working and communicable? via a program > written in .NET by a friend of the friend who gave it > to me. The program has so many things I wish to change > that it would be easiest to start from scratch. I have > some of the source for bits and pieces that may be > needed. > > The data coming in/going out will be COBS encoded, > which changes/escapes all 0x00 bytes, then uses a 0x00 > byte for the framing. > > > COBS theory is explained here: > http://www.stuartcheshire.org/papers/COBSforToN.pdf > > and it looks like a version written in c is at: > http://gtk-gnutella.sourceforge.net/doxygen/cobs_8c.htm > > > I would initially be happy creating a cobs.py and then > modding the initial 1.1 release of miniterm and seeing > if I could listen to the device... The device will be > sending packets of 2-12 bytes at regular intervals > (99% will be 7 byte packets every minute or so), and I > can just move the serial cable over from the com port > with the working application to the cobs-miniterm one > to see if I am getting the right. > > Thanks in advance! > > -mike > clearwater, fl > > > > __________________________________ > Yahoo! Mail - PC Magazine Editors' Choice 2005 > http://mail.yahoo.com > _______________________________________________ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > > _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
