I want to ask if it is possible to create an application for scoreboard with which that app would b e used as a controller for a electronic device i.e. Scoreboard..?
And Is it possible if it will be wireless instead of connecting android tablet using serial/ usb port to the device?
Any advice would be appreciated THANKS!
The easiest way to control a scoreboard without wires could be to use an infra red controller:
Do you mean that you want an Android device to send data to an Arduino which will control the electronic digits on a scoreboard?
You should easily be able to send data using bluetooth.
Infrared would be an easy method, provided it is not outdoors. If outdoors, consider using an NRF24l01+ or similar - range can be very good.