:::note Airspeed sensors are highly recommended for Fixed-wing and VTOL vehicles. :::
:::warning Unlike most other sensor drivers, the airspeed sensor drivers are not automatically started. Before calibration they must be enabled via the corresponding parameter:
- Sensirion SDP3X (SENS_EN_SDP3X)
- TE MS4525 (SENS_EN_MS4525DO)
- TE MS5525 (SENS_EN_MS5525DS)
- Eagle Tree airspeed sensor (SENS_EN_ETSASPD) :::
To calibrate the airspeed sensor:
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Start QGroundControl and connect the vehicle.
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Enable the airspeed sensors if not already done (as in warning above).
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Select the Gear icon (Vehicle Setup) in the top toolbar and then Sensors in the sidebar.
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Click the Airspeed sensor button.
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Shield the sensor from the wind (i.e. cup it with your hand). Take care not to block any of its holes.
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Click OK to start the calibration.
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Once asked for, blow into the tip of the pitot tube to signal the end of calibration.
:::tip Blowing into the tube is also a basic check that the dynamic and static ports are installed correctly. If they are swapped then the sensor will read a large negative differential pressure when you blow into the tube, and the calibration will abort with an error. :::
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QGroundControl then tells you if the calibration was successful or not.
