Need Consultant or guide

Need Consultant or guide


Job Description

Hello Experts,

I want to communicate with external hardware via my mobile application.
Mobile application will be in android,IOS and windows and that I can develop but I dont have any knowledge of external hardware development and its communication.
Basically I just want to blow LED with little vibration in external hardware via Mobile application.

SO what I want to know from expert is

1) Cost wise Which is the best approach to communicating with external hardware via mobile app.(Bluetooth or wifi)

2) How to build this kind of external hardware or any available in low rate (Again I just want to blow some LED with different colors and vibrate the device)

Your responsibility is to guide and work with us from start to end of project.

Person with this kind of experience is valuable.

Thanks in advance..