Needed for Printer-Server Communication Protocol Development -- 2

Looking for an experienced freelancer to develop a communication protocol between a GOODCOM Printer and a Server Goodcom. Must be familiar with thermal printers and configuring parameter settings. Knowledge of serial, parallel, or USB communication is a plus. Additionally, assistance is needed in creating an online ordering system with features like real-time notifications, payment integration, discounts, loyalty tracking, and address search. Project duration is one week d. Payment upon successful completion. Please provide examples of past work.