Robot 2, software
A question, a problem or a suggestion, don't hesitate : a little email
The Android software
For the Android side, I have used the Arduino Bluetooth Controlled Joystick sofware from Uncia Robotics downloadable from GooglePlay (free).
After installation, the program is directely usable, the only thing to do being to pair (bluetooth speaking) the robot with the smartphone.
Use the BlueTooth icon to chose the device to connect with, with the robot already powered. Don't forget the PIN of the robot if you want to use one (default is 0000).
The Arduino software
For the Arduino side, you will find here the program source in its actual configuration, now using the Arduino IDE.
The next modification could be to be able to enter in a test mode during the boot of the robot.
Don't hesitate to ask me for a modified version if you need it.