Abstract: Notice boards are very important in places such as Railway Stations, Schools, offices and other organizations, as we have to keep updates about everything, but the traditional methods are very old and is very troublesome to keep it updated. Old traditional method uses paper to display the message. In our system we’ve upgraded our technology and made it digital using Dot Matrix Display [DMD], Arduino and Bluetooth module. Using this system our Matrix displays message sent through Bluetooth App remotely anywhere near the Bluetooth module. Due to its wireless connectivity message is displayed immediately as soon as it is sent through the app. Bluetooth module is flexible as it doesn’t require any internet connection but the range is relatively low. But the main advantage using the Bluetooth module is that it much secure and the connection time period is less that the other wireless communication methods. The controller itself is very easy to work with and the programming the UNO board is also very flexible and easy, with the number of I/O ports available in the board it is very easy to connect external devices to it. The software used to code is also user friendly. The board used in the project is Dot matrix which has many advantages over LED matrixes.

Keywords: Arduino UNO, Wireless connectivity, DMD [Dot Matrix Display], Bluetooth Module, PCB Designing.

| DOI: 10.17148/IARJSET.2022.9521