Smart Shopping Card with Automated Invoice Mechanism

Abstract - The rapid growth of technology has transformed many sectors, including retail shopping. Traditional billing systems in supermarkets require customers to wait in long queues while items are manually scanned at checkout counters. This process consumes time and often leads to customer dissatisfaction. The Smart Shopping Cart with Automated Invoice System is designed to simplify and speed up the billing process using Internet of Things (IoT) and RFID technology. In this system, RFID tags attached to products are scanned automatically when placed in the shopping cart. The cart contains an RFID reader, microcontroller, and LCD display that identify products and calculate the total bill in real time. The customer can view the selected items and the total amount directly on the cart display. After completing shopping, the system generates an automatic invoice and sends the information to the central billing system. This approach eliminates long queues, reduces manual errors, and improves the overall shopping experience. The proposed system provides faster billing, improved inventory management, and enhanced customer satisfaction in modern retail environments. Key Words: Smart shopping cart, RFID technology, IoT, automated billing, retail automation, NodeMCU.