Design of Digital Notice Board using ESP32

Abstract: Communication plays a major role in educational institutions, offices, and public places. Traditionally, notice boards have been used to display important announcements, schedules, circulars, and emergency alerts. These notice boards require manual posting, which involves printing the notice, physically placing it on the board, and frequently updating or removing it. This traditional process is slow, time-consuming, labour-dependent, and often leads to communication delays. With the increasing use of smartphones, cloud computing, and IoT (Internet of Things), there is a growing need for a modern, efficient, and instant notice delivery system. IoT technology allows devices to communicate and share information over the internet in real time. By applying IoT to notice boards, messages can be updated wirelessly from anywhere, eliminating the need for manual updates.

The ESP32 microcontroller, with built-in Wi-Fi, makes it possible to connect a display system to the internet. Combining ESP32 with Firebase Realtime Database enables fast and reliable cloud-based communication. A notice posted from a mobile app can reach the display board instantly through the cloud. This forms the foundation of an IoT-powered digital notice board system. In this project, a mobile application is used to create and send messages. These messages are uploaded to Firebase, and the ESP32 retrieves them and displays them on a VGA monitor. This provides a smart, eco- friendly, and automated replacement for traditional notice boards. The system is especially useful for institutions that require quick updates, such as schools, colleges, offices, malls, and transport stations Over the past several decades, notice boards have remained a common means of communication in public and private institutions.

Keywords: Cloud, ESP32, Mobile Application, Display, Web Page, Wi-Fi.