Wonder is it possible to add a wireless control to the fan
I don't believe the Arduino has a fan. None of mine do, anyway.
Making an Arduino control a fan, turning it off or on, is easy. Setting the speed may or may not be, depending on the fan.
Using an Android to push switches on the Arduino is possible. Though using your finger is just as easy.
Perhaps you need to explain your project a little better.
perhaps i had not been clear in my writings,
1) Interfacing Arduino to control a stand fan. Original fan control unit is of push buttons. Use the arduino to replace the fan control unit to control the different oscillations speed.
2) Use Android program to communicate to the Arduino wireless. Android app will act like a remote control.
wish to get some ideas what components are required? is it possible to modify the fan control unit ?