Smart Wireless Notice Board

Problem statement

Conventional notice boards require printing and manually pinning paper notices, which is slow and inconvenient.

Abstract

This project builds an electronic notice board where authorized users can send text messages wirelessly from a mobile device. A Bluetooth or Wi-Fi module receives the text and a microcontroller displays it on an LCD or LED matrix display.

Components required

• Microcontroller board such as Arduino
• Bluetooth HC-05 or Wi-Fi module
• 16x2 LCD or LED matrix display
• Push buttons for local control (optional)
• Mobile app or terminal for sending text
• Power supply and enclosure

Block diagram

Working

The mobile application pairs with the wireless module and sends text when the user submits a notice. The microcontroller listens to the serial data, stores the message and displays it on the screen. Security can be improved by using a password or secret code in the message.

Applications

• Digital notice boards in schools and colleges
• Office and reception information displays
• Shops and promotional boards
• Bus stand or waiting hall displays