Airspeed Sensor

Copter, Rover, and Blimp can attach and enable an Airspeed Sensor. However, unlike Plane which uses the readings for navigation and control, these vehicles only log and report the readings for use by the displays in Ground Control Stations, OSDs, and telemetry. The Plane airspeed sensor documentation can followed for selecting and mounting an airspeed sensor. However, be aware that it will not provide discussed in Plane except for measurement and reporting.

The one exception to the above is that Sailboats can use an airspeed sensor as part of a Wind Vane (WNDVN_TYPE = 4) and use its readings to calculate wind speed as a part of navigation.

The following airspeed parameters have no effect and should always be set to “0” value:

• ARSPD_USE
• ARSPD2_USE
• ARSPD_OPTIONS
• ARSPD_AUTOCAL
• ARSPD2_AUTOCAL
• ARSPD_WIND_MAX
• ARSPD_WIND_WARN

Otherwise, the following parameters should be set if an airspeed sensor(s) are used:

• ARSPD_TYPE
• ARSPD2_TYPE if two sensors are used
• ARSPD_PIN if an analog sensor is used
• ARSPD2_PIN if a second analog sensor is used
• ARSPD_PRIMARY if two sensors are used
• ARSPD_BUS if an I2C sensor is used
• ARSPD_RATIO for the sensor is used, but usually will be automatically set by type selection
• ARSPD2_RATIO if a second sensor is used, but usually will be automatically set by type selection