Each module (with the powerbrain as an exception) is assigned a specific color by the powerbrain.
Connecting an arduino-powerbrain (!) via USB cable to a PC activates the colors on all connected modules.
Use these to initialize the objects in your sketches correctly.|
E.g. after plugging in the USB cable, a connected Motor lights up a purple LED. You will have to initialize this motor in the sketch with "TBMotor variableMotorName(PURPLE);"