Configuring an ESC with BLHeli firmware using an Arduino Uno

The Importance of Motor Direction

In order to stop our drone spinning like a top, it is important that the four motors turn in a particular direction. As shown in figure 1, we want the motors to alternate spinning clock wise and counter clockwise. This arrangement causes the torque from the spinning motors to cancel out and the quad only yaws when we want it to.

Figure 1. Required Motor Directions for the Magpie Drone.