This document outlines the steps I use to set up a Raspberry Pi as a Check-in Printer Station. That is, a "computer" that connects to a Dymo printer and accepts print jobs from Planning Center ...
Lightweight, concurrent-friendly REST API for printing to ESC/POS thermal printers (currently verified only on EPSON TM-T88II; other ESC/POS models may work but are untested). Supports raw ESC/POS ...