Motor controller

[Andreas29]

Hi,

as mentioned before,

you can try to connect your (maybe broken) Pi Zero via usb to your arduino nano.
Feed your pi via the second usb port with power, so the arduino gets power too.

Try this (only arduino and pi) and look for the leds.

The message "no motorcontroller" is shown cause you have no connection to the arduino.
You can try to get a connection between the pi and arduino. This you can test without the motor-driver (h-bridge, ibt-2 or similar).

Regards

Andreas