Abstract: The System aims to redefine traditional notice boards by integrating a microcontroller, MQTT, and an I2C LCD display. Through a physical button interface, users input data, transmitted via MQTT, leading to real-time updates on the LCD display. This innovation bridges web-based inputs with hardware communication, offering seamless and instant information dissemination. It revolutionizes communication in educational institutions, public spaces, and offices, allowing remote updates for notices, messages, or alerts. By merging IoT technology with a button-controlled microcontroller, the system enables dynamic content delivery, enhancing communication efficiency. This versatile solution transforms static notice boards into dynamic displays, facilitating swift and impactful information sharing. Its integration of web-based inputs, MQTT communication, and a user- friendly interface creates a novel platform for efficient, real-time communication in diverse environments.

Keywords: Node-MCU; LCD Display; I2C Adapter; Buzzer

| DOI: 10.17148/IARJSET.2024.115111