Desktop app to enable direct use of receipt printers in web apps. https://netsyms.biz/apps/nickelbridge
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README.md

NickelBridge

NickelBridge is a simple utility that allows NickelBox to interface with receipt printers. It runs a simple web server listening on localhost:64269 (nibox) that accepts JSON-format receipts and attempts to print them to whatever device is configured in the UI.

NickelBridge uses node-thermal-printer to print receipts. It therefore supports the Epson ESC/POS and STAR protocols. NickelBridge itself has only been tested with ESC/POS.

Endpoints

  • GET /status: Returns JSON {"status": "OK", "width" 48} where the width is the user-configured maximum width in characters of a single printed line of text.

  • POST /print: Accepts a JSON body comprised of the output of a json format NickelBox receipt. Prints it, cuts the paper (if hardware allows), and responds with {"status": "OK"}.

  • POST /opendrawer: Instructs the receipt printer to pop open the cash drawer, if there is one attached.