[Noisebridge-discuss] Snooping RS-232C/Serial Data

[Jonathan Lassoff]

I've recently purchased an MSR-206 clone (MSRW-206 -- far to similar of
a name if you ask me), however despite coming with documentation that
appears to be nearly a word-for-word copy out of the MSR-206
programmer's reference, some of the commands don't appear to operate as
documented.

Namely, the three-track raw read command doesn't work as expected :(

Thankfully, it did come with an example Windows application that does
seem to know how to talk at the box, and it's working fine. At this
point, I'm interested in figuring out how to trace the commands that are
being sent/received to the unit.

So I'm stuck trying to figure out a way to get a dump of the bytes going
out to a serial device. I'm running the Windows environment in a VM that
passes access to my USB->Serial dongle into Windows.

Has anyone found a good way to do this in the past? Surely it can be
done in software somehow. Failing that, I suppose it might be possible
to trace the hardware signalling.

--j