This example:

http://your.empeg./proc/empeg_notify?SERIAL=%23100

sends "%23100\n" to the serial port "input". The %23 is just a '#' character, so it really sends '#100\n', which should (after a few seconds) cause the player to restart at the root level playlist.

The rest of the URL just returns current player status.

You could replace /proc/empeg_notify with /dev/null to send the command but receive no output back.

-ml