Man, I wish I'd bookmarked the sites I visited while researching this... well, anyhow, if you look around, there's some software for Linux that will let you throw up a fake device (some kind of simulator to let you work out programming the serial port). Well, I dunno, google is your friend because this is just something I'm interested in rather than an area of expertise.

In reply to Re^5: Open serial port without Device::SerialPort by Anonymous Monk
in thread Open serial port without Device::SerialPort by ThomasBrouwer

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