Gyroscope Calibration
QGroundControl will guide you to place the vehicle on a flat surface and keep it still.
Performing the Calibration
The calibration steps are:
Start QGroundControl and connect the vehicle.
Select "Q" icon > Vehicle Setup > Sensors (sidebar) to open Sensor Setup.
Click the Gyroscope sensor button.
Place the vehicle on a surface and leave it still.
Click Ok to start the calibration.
The bar at the top shows the progress:
When finished, QGroundControl will display a progress bar Calibration complete
INFO
If you move the vehicle QGroundControl will automatically restart the gyroscope calibration.