Debugging pays attention to the method. Once the servo is powered on, it will move to the corresponding position. If the corresponding position is in the dead corner of the mechanical arm, the servo will not move if it wants to move, and it will be in the card master state.
1. For debugging of one servo and one servo, use the servo with the largest movement angle to debug all ports, which is the base servo
2. The first servo is working normally, then install the second servo