# Airspeed Sensors
Airspeed sensors are highly recommended for fixed-wing and VTOL frames. They are so important because the autopilot does not have other means to detect stall. For fixed-wing flight it is the airspeed that guarantees lift not ground speed!
# Hardware Options
Recommended digital airspeed sensors include:
MEAS Spec series (e.g. MS4525DO (opens new window))
EagleTree Airspeed MicroSensor V3 (opens new window) (eagletreesystems)
All the above sensors are connected via the I2C bus/port.
Additionally, the Avionics Anonymous Air Data Computer (opens new window) can be connected to the UAVCAN bus to determine not only high-accuracy airspeed, but also true static pressure and air temperature via onboard barometer and an OAT probe.
PX4 setup information can be found in: Basic Configuration > Airspeed.
# Developer Information
- Airspeed drivers (opens new window) (source code)