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I've got a device with a RS-232 output that I want to connect to a USB label printer. I know you can buy ready made units to do this but the units I've looked at cost £80+ and they seem to need to use a USB printer that does it's own emulation such as postcript or PCL. I want to just plug in a basic, cheap USB printer. Going the other way (USB > RS-232) is really cheap, 99p on ebay. Having looked at the price I thought this may be an ideal Raspberry Pi project. Receive from RS-232, translate to the correct format for the printer and then output it. I just wondered if anyone on here has any experience of doing anything similar and could suggest how I go about starting such a project considering I'm a Pi virgin!