Droid Ei is a free platform where you can remotely control your accessory using a smartphone. You need to install the Droid Ei app in your Android mobile. Goto http://www.droidei.com/ , create a account.
Step 1: Upload Droid Ei emulator to your I/O board
1. Upload EmulateEi code into your I/O board. EmulateEi is common for all project.
EmulateEi is found in this URL.
Copy it and burn it into your Arduino MEGA ADK.