RFID-GSM based intelligent cart for automated retail

This paper presents the design and implementation of an RFID-GSM based intelligent cart system to automate the retail checkout process and reduce long queues and manual billing inefficiencies. The proposed system is built around an Arduino Uno microcontroller, integrated with an EM18 RFID reader for automatic product identification via RFID tags. An I2C LCD displays item details and running totals in real-time, while a push button allows customers to finalize their shopping. Upon checkout, the total bill is calculated and sent via SMS using a SIM900A GSM module to the customer's registered mobile number, enabling a paperless transaction. A buzzer provides audible feedback during item scans. The proposed system is powered by a regulated supply, programmed using Arduino IDE, and interfaced via USB. The investigated system reduces billing time, minimizes human errors, supports eco-friendly operations, and enhances the shopping experience through seamless automation.