4 motors needed. Upload code to your robot controller by plugging the phone into your laptop with android studio opened with the code and click the play button, a prompt should open up with the phone you are using just click on that and continue. Once completed unplug and connect the phone to the robot scan for devices. Then configure it by naming the motors the names that are in the code. Make sure both phones are connected, select the iterative drive on the driver station phone and press start. Omni drive tested with tetrix parts.