one warning on the sigma-shop board, it may not follow usb suspend rules, thier 1 relay board did not, and left itself on, when in suspend...
which is a NO NO, and could result in a dead battery...
as for plugin, i doubt it, its only 3 bytes it needs to turn a realy on or off... a plugin would be very easy, specailly in .net!
or you could code a command line program... and just call it directly from RR
that means relay #1 on
that means realy #1 off
---------- Post added at 12:59 PM ---------- Previous post was at 12:55 PM ----------
OR, you could (shameless plug) buy a MJS Gadgets USB-IO-1, its 4 relays, but there is a plugin for RR (and CF too)