In this Arduino Tutorial you will learn about HC-05 Bluetooth module and how to use it with Arduino to control a 12V DC Fan with Android App. This video includes code explanations and wiring setup. You’ll also find out how to pair HC-05 Bluetooth module with your smartphone and use a mobile app for controlling the fan’s speed and direction.
https://www.youtube.com/watch?v=vy5bn2cfU3c&t=5s
