![]() At least one manufacturer of accessibility devices (a braille embosser) has stated to us that they don't recommend RS232-to-USB adapters because they have had (unspecified) problems with them. RS232-to-USB consumer adapted will sometimes work, sometimes not. Until not too long ago, all of the above were still mainly RS232 devices, and a common headache has been finding a way to plug those in a modern laptop. My most direct experience comes from amateur astronomy and accessibility computer accessories for the visually-impaired. RS-232 has been the preferred interface for custom-build devices, scientific instruments, and low-production devices far long after everybody started using USB for mice and high volume consumer devices. Not so easy: there is a lot more than mice and printers out there. ![]() Oh, yes that might seem like a ludicrously obvious statement - "duh! nobody's been using Serial for a decade now". You should seriously consider USB as an interface for your project. The USB port has been starting to take over the duties of RS-232 for the last few years.
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