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Since then I've written any number of serial terminal programs, most not very good. But some years ago I decided to virtualize it, intending that any handy computer could stand in for a serial terminal. Years ago I simply kept a real serial terminal around - glass screen, heavy, unreliable. I have always needed a serial terminal for one reason or another, some having to do with owning a boat, or being a radio amateur, or wanting to communicate with a shipboard satellite dish. And most real terminals (not virtual ones) communicate with a serial interface. Most people who use serial interfaces on small computers must rely on USB-to-serial adaptors, since the old-style serial connectors have vanished and few find a use for serial interfaces any more - they are slow, relatively unsophisticated, and a bit tricky to set up.īut there are a few niche applications - anything involving GPS will likely need a serial communications channel at some point. Figure 2: Old-style RS232 serial circuit tester Discussion