PX4-Autopilot/docs/en/sensor/gyroscope.md

Gyroscope Hardware & Setup

PX4 uses a gyroscope for estimating the vehicle attitude (orientation).

You should not need to attach a gyroscope as a stand-alone external device:

• Most flight controllers, such as those in the Pixhawk Series, include a gyroscope as part of the flight controller's Inertial Motion Unit (IMU).
• Gyroscopes are present as part of an external INS, ARHS or INS-enhanced GNSS system.

The gyroscope must be calibrated before first use of the vehicle:

• Gyroscope Calibration