Design and implementation of smart web-QR controlled vending system

The Research Paper “Design and implementation of smart web-QR controlled vending system” focuses on developing an intelligent and contactless vending system that integrates Internet of Things (IoT) technology with web-based QR functionality. Traditional vending machines rely on manual operation and cash-based payments, making them less efficient, unhygienic, and difficult to monitor remotely. The proposed system overcomes these limitations by using a Raspberry Pi 3B+ microprocessor as the central controller, connected to a Firebase real-time cloud database for monitoring inventory and transactions. Users can scan a QR code displayed on the vending machine to access a web interface built using React JS, which enables them to select products, view prices, and confirm purchases without physical contact. The Raspberry Pi processes the request and activates the corresponding motor driver to dispense the selected item, while sensors verify successful delivery and update the database automatically. This system provides touchless operation, real-time control, and efficient management of inventory. It also demonstrates scalability for integration with digital payment gateways and AI- based stock prediction. By combining IoT, cloud computing, and web technologies, the Research Paper aims to enhance user convenience, hygiene, and automation in next-generation vending solutions.