The flight controller uses the data gathered by the sensors to calculate the desired speed for each of the four motors. The flight controller sends this desired speed to the Electronic Speed Controllers (ESC’s), which translates this desired speed into a signal that the motors can understand.

We have variety of Aut0pilot and Flight controllers that you can choose, The main difference between the two is that an autopilot is a complete system that enables your drone to fly autonomously to way-points etc…, And a flight controller is just the device that will keep your aircraft stable.