[Rails] Integrating hardware with browser

Hello,

I've looked high and low and found just 1 post with some information
about this subject, from 2008, and Google searches turned out pretty
much no useful information. I would appreciate any help on this.

I need to be able to control several devices (card reader, printer,
camera, cashier drawer) attached to the client. Has anybody done
anything similar? Any info/links would be greatly appreciated.

Thank you

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