Next-Gen Digital Noticeboard with IOT Updates

Abstract

Traditional notice boards are widely used in educational institutions for displaying announce- ments and important information. However, these systems require manual updates and often result in delayed communication, paper waste, and limited accessibility. Several digital notice board solutions have been proposed using technologies such as GSM modules, Arduino microcontrollers, and NodeMCU boards. Despite these developments, many existing systems suffer from limitations such as restricted display capabilities, lack of centralized control, limited multimedia support, and inadequate security mecha- nisms. This research proposes a next-generation IoT- based digital notice board system designed to deliver secure, real-time information updates across multiple display units. The system integrates a web-based ad- ministrative dashboard built with React.js, a Node.js and Express.js backend for handling API services, and a MongoDB cloud database for storing notice meta- data. Media files are securely hosted using cloud stor- age services and delivered to display devices through real-time communication using Socket.io. Raspberry Pi devices configured in kiosk mode act as display endpoints capable of rendering dynamic multimedia content. Additionally, the system incorporates inter- active features such as QR-code based mobile access, gesture navigation using sensors, voice alerts for im- portant notices, and hybrid connectivity mechanisms including Wi-Fi and Bluetooth to ensure continuous operation even during network interruptions. Experi- mental evaluation demonstrates improved scalability, secure communication, and faster notice propagation compared with traditional microcontroller-based dig- ital notice board systems.