Learn Robotics Programming

Troubleshooting

If you see any problems, try this troubleshooting chart and go back:

Symptom	Likely cause and solution
You see: ImportError: No module named smbus	You have missed the step installing the required packages. Ensure you have followed the apt-get install steps above.
You see other errors	Please go back and carefully check that you have typed and uploaded the code above to the Raspberry Pi.
One or both sides are going backwards	The motor wires are the wrong way. On the motor terminals only, swap the black and red wire. Refer to the How to wire up the motors and batteries photo for help.
The light is on the controller, but one or both motors are not moving.	Please ensure that both motors wires are firmly ...