Stop your program any time by pressing the green button on your hub.
When you're finished using your bot, press and hold the green button to turn it off.
Troubleshooting
The hub won't light up.
Make sure you've installed all six AA batteries, and that they are fully charged and facing the right direction.
The hub light keeps blinking blue. It won't switch to fading blue.
Make sure you've , and that the program has no bugs.
The controller won't light up.
Make sure you've installed two AA batteries, and that they are fully charged and facing the right direction.
The controller won't connect.
Turn your hub off and on again.
Make sure the light on the hub is fading on and off .
Then repeat the pairing steps.
A bug in your code is causing the program to crash. Try removing lines one at a time until it works.