In the previous chapter, we installed all the electronic parts and, after connecting the battery, we verified that everything was working. The quadcopter needs to sense the environment. We need to calibrate our transmitter, accelerometer, and any other sensor that we might have. That way, the quadcopter will be able to understand if it is looking to the front, left, back, or right; it can also determine the necessary angles, which will later determine the exact maneuvers required for stabilization. In addition, proper calibration of the flight controller will result in a safe and stable flight. ArduPilot (APM FC) can be connected to a computer with a USB or a MicroUSB cable. This is the right way for all the calibrations that we need to do.

In this chapter, we will cover the following topics: