Note: help and version output are generated by a naïve script which tries a few variants of
<command> --help, <command> -h etc. to find the command's help and version info.
Sometimes it gets lucky, sometimes it doesn't; if the output below looks wrong, it probably is.
gpscat -V (return code: 1)
gpscat: option --version not recognized
gpscat -h (return code: 0)
usage: gpscat [-s speed] [-p] [-t] [-D debuglevel] serial-port