Wireless notice board using Bluetooth

Description

Wireless Notice Board Using Bluetooth

Introduction
The wireless notice board is an innovative project designed for educational institutions, offices, shops, and other public places to display messages wirelessly. This system eliminates the need for manual updates on traditional notice boards and ensures quick and efficient communication. The project uses an Arduino 328 SMD microcontroller, an HC-05 Bluetooth module, and a 16×2 LCD to display messages sent from a mobile or desktop application called “BTRobota.” The device can be powered using a 9V to 12V battery or adapter, making it versatile and portable.

Components Used

1. Arduino 328 SMD:
   This compact microcontroller serves as the brain of the system. It processes the data received from the Bluetooth module and displays the message on the LCD. The Arduino 328 SMD is chosen for its small size, reliability, and ability to handle serial communication effectively.
2. HC-05 Bluetooth Module:
   The HC-05 module is used to enable wireless communication between the Arduino and the controlling device (mobile or desktop). It operates on a standard Bluetooth protocol and ensures smooth data transmission over a range of approximately 10 meters.
3. 16×2 LCD:
   A 16×2 LCD (Liquid Crystal Display) is used to display the messages. It can show up to two lines of text, each with 16 characters. This makes it ideal for short notices or instructions.
4. Power Supply:
   The system can be powered using a 9V to 12V battery or an adapter. This flexibility ensures that the notice board can be installed in locations where direct power supply may not be available.
5. BTRobota Application:
   The mobile and desktop application “BTRobota” is used to send messages to the notice board. The app communicates with the HC-05 module via Bluetooth, making the entire system easy to operate.

Working Principle

1. Initialization:
   When the system is powered on, the Arduino initializes the HC-05 Bluetooth module and the 16×2 LCD. A welcome message such as “Wireless Notice Board” is displayed on the LCD.
2. Bluetooth Connection:
   The user pairs their mobile or desktop device with the HC-05 module using the Bluetooth settings. Once connected, the “BTRobota” application can be used to send messages.
3. Message Transmission:
   The user types a message in the BTRobota app and sends it to the Bluetooth module. The HC-05 module receives the message and forwards it to the Arduino.
4. Message Display:
   The Arduino processes the received data and displays it on the 16×2 LCD. If the message exceeds 16 characters, the text scrolls horizontally to ensure the entire message is displayed.
5. Power Supply Management:
   The system can be powered by either a 9V to 12V battery or an adapter, making it suitable for both portable and fixed installations.

Features and Benefits

1. Wireless Communication:
   The use of Bluetooth ensures a wireless and clutter-free system. Messages can be updated remotely within the Bluetooth range.
2. User-Friendly Operation:
   The BTRobota app provides an intuitive interface for sending messages, making it easy for anyone to operate the notice board.
3. Portability:
   With a battery option for power, the system can be used in areas where a direct power supply is not available.
4. Cost-Effective:
   The components used in this project are affordable and easily available, making it an economical solution for modern communication needs.
5. Customizable:
   The system can be enhanced further by adding features like a larger LCD, support for multiple languages, or integration with IoT for remote control over the internet.

Applications

1. Educational Institutions:
   Schools, colleges, and universities can use the wireless notice board to display important announcements such as exam schedules, event updates, and notices.
2. Offices:
   Offices can display meeting schedules, important updates, or motivational messages to employees.
3. Shops and Restaurants:
   Shops can display discounts or offers, while restaurants can use it for daily menus or special items.
4. Public Places:
   It can be used at bus stops, railway stations, and other public places for announcements or directions.

Future Scope

1. Internet of Things (IoT):
   The system can be upgraded to work over Wi-Fi, allowing global control and updates via the internet.
2. Multiple Display Support:
   By using multiple LCDs or larger displays, the system can handle more extensive and detailed information.
3. Voice Command Integration:
   Adding voice command support through virtual assistants like Alexa or Google Assistant can make the system more interactive.
4. Solar Power:
   Incorporating solar panels can make the system more energy-efficient and eco-friendly.

Conclusion
The wireless notice board using Bluetooth is a simple yet powerful tool for displaying messages efficiently. Its compact design, affordability, and ease of use make it an excellent choice for modern communication needs. By incorporating additional features like IoT and voice control, this system has the potential to revolutionize how information is shared in various domains.