On Mon, Aug 10, 2009 at 09:56:57AM -0400, james collins wrote: > Do I test this with yasr running? Only if the Mac numbers it's serial ports /dev/ttyS#. It's a UNIX command that *should* work. It just redirects screen output from the echo command to /dev/ttyS0, using the '>' redirector. It should work with any shell program out there (that I know of). HTH, Michael