Expandable Smart Table Module for Contactless Customer Ordering, Waiter Calling, and Bill Request

Abstract

This utility model is a microcontroller-based smart table module system that enables customers in restaurants, cafes, and similar service points to place orders, call a waiter, and request the bill contactless; it operates using contactless data transfer technologies. The system operates by default with an ESP32 microcontroller and a PN532 NFC module; the customer accesses the digital menu by bringing their smartphone close to the module and performs actions using the "Place Order," "Call Waiter," and "Request Bill" buttons. This data is transmitted wirelessly to a local or cloud server based on Python Flask. The developed system is expandable to work not only with NFC but also with alternative contactless data transfer technologies such as RFID and Bluetooth Low Energy (BLE). Image recognition or QR code processing systems are excluded. On the software side, it is compatible with Django, Node.js, or other server technologies besides Flask. The system's primary technical contribution is to increase labor efficiency and reduce human error in restaurants. Waiters can provide explanatory communication that adds value to the customer and deliver faster service without having to deal with the manual order-taking process. It reduces order confusion, especially during peak hours, and improves service quality. The system also includes advanced features such as end-of-day sales report generation, digital tracking of all orders, inventory-integrated menu management, and SMS notification infrastructure (e.g., Twilio API integration). It is expandable. Menu visuals can be easily uploaded by the business, or digital versions of ready-made menus can be used. To expand its scope, this system has been designed modularly so that it can also be applied in hotel rooms, self-service areas, and exhibition and event stands.