CODEWITHSUNDEEP
printing
Peter Catala
Peter Catala

Reputation: 11

Using a virtual printer to modify a receipt in a POS printer

I am trying to modify the receipt printed in a POS printer using a virtual printer and some custom libraries. However I read that (old) POS printers worked by writing directly to a serial port, and if that's the case I would need more a port listener, as opposed to a conventional windows virtual printer. Is that correct?

I am trying to build a general solution, trying to cover as many cases as possible, but I got that direct serial is somewhat an outdated practice.

Upvotes: 1

Views: 4670

Answers (2)

LtH
LtH

Reputation: 702

Check if the printer manufacturer has a virtual serial port emulator you can use. Most old POS software was written to send commands over a COM port. The emulator essentially listens in on that port, intercepts the commands, and translates them so a modern USB or Ethernet printer can output the print jobs.

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That chart can be found here with more information: http://www.starmicronics.com/support/TechnologyCategoryDetail.aspx?id=28

Upvotes: 2

Douglas Anderson
Douglas Anderson

Reputation: 4690

This app sends data directly to a COM port and not to a Windows queue of any sort? What port options do you have? If you have LPT as an option that could be remapped to a share and then captured using Redmon or similar port monitor.

Upvotes: 0

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