A Bluetooth Notice Board is a fun electronics project that allows you to send messages or notifications wirelessly to a display board. It’s a great way to make a smart notification system for home, office, or other applications. In this project, we will use an Arduino Uno board along with a Bluetooth module to receive wireless messages and display them on an LCD screen.
Parts Needed
- Arduino Uno Board
- 16×2 LCD Display
- I2C Module for LCD
- HC-05 Bluetooth Module
- Jumper wires
- Breadboard
- An Android/iOS app
Schematic
The HC-05 Bluetooth module is connected to the Arduino Uno via serial communication on pins 0 and 1. The 16×2 LCD is interfaced to the Arduino using an I2C module. This allows the LCD to communicate over the I2C protocol, using only 2 pins on the Arduino.
Code
The Arduino code receives serial data from the Bluetooth module and displays it on the LCD by writing to the I2C module.
Link to Code: Click Here
Working
The HC-05 Bluetooth module is paired to a smartphone. A message can then be sent wirelessly from a custom app on the phone to the Bluetooth module. The Arduino code receives the message string and prints it on the LCD screen. The message is displayed on the top row of the 16×2 LCD display.
Conclusion
The Bluetooth Notice Board provides a neat way to display notifications and messages wirelessly on an LCD display. It uses common components like a Bluetooth module, LCD display, and I2C interface. The full code is available to create your own programmable message board using an Arduino and a simple app. There are many possibilities to enhance this project further such as supporting graphics or animations on the display.
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