Thanks for all the useful advice.
I haven't quite got my head around a micro-processor equipped footswitch, so I'm using my original idea - a simple make/break switch wired between DTR and CTS.
I've had some success with the first part of the problem (detecting CTS high) using Microsoft WIN32...
I would like to connect a simple (make/break contact) footswitch to a serial port, which will enable hands-free operation of an application. Before I begin development, has anyone done this? I've outlined the abstract below, but I don't want to re-invent the wheel! Alternately, if I am to do...