Author: Pito Salas
An excellent and very detailed troubleshooting guide for the Raspberry Pi
Blinking green is the “starting up” indication.
Solid green is the “ready” indication.*
Solid yellow is the “low battery” caution indication.
Solid red is the “low battery” warning.
Blinking red is the “shutting down” indication.
Blinking purple is (AFAIK) the “I don’t know what is going on” indication, but I could be wrong.
But, note that all of these indications are only valid when using a Dexter Industries / Modular Robotics operating system. (i.e. Raspbian for Robots, GoPiGo OS, or Dexter OS). It will continue to blink green when using any other O/S. The Minirover configuration is Ubuntu! Also see: https://www.dexterindustries.com/GoPiGo/get-started-with-the-gopigo3-raspberry-pi-robot/2-connect-to-the-gopigo-3/
To Change the default python on ubuntu (assuming you want it to be python3.4)
sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.4 1