Not sure if this comment should come here...
I am trying to build the visually-guided robot according to the tutorial
I noticed that the tutorial uses Arduino pins 20 and 21 to connect to IN1/IN2 of right and left motors on the motor driver.
However pins 20 and 21 are the TX and RX pins on the pro micro arduino board used.
As the TX/RX pins are of course used to receive serial information from the jevois camera, they cannot be used to drive the motors.
I guess that any digital pins can be used instead, but this should preferably be modified in the tutorial.