cardump opens a serial tty and dumps any valid Carrier/Bryant serial frames found.

It's a simple and fast utility to monitor or log RS485 traffic. It does not write to the bus.

My C skills are quite rusty, but cardump is known to compile on x86/MIPS/ARM processors and under uClinux

A C compiler and basic build tools are required. To build:

make

Pipe from a serial tty(see Infinitude Hardware for inexpensive rs485 interfaces.) for best results:

./cardump < /dev/ttyS0

Or on a log file, but the timestamps won't be very useful:

./cardump < aLogFile 

TSV of valid frames dumps to STDOUT and human readable output goes to STDERR. So, to create a TSV logfile and simultaneously monitor activity, one might run:

./cardump < /dev/ttyUSB0 > frames.tsv