PX4/Firmware — pull request #325 by sjwilks (2013-07-06 23:25:15+00:00)
Title: Don't zero out the reported airspeed when below 15km/h

The ETS Airspeed manual states that it only gives reliable readings at around 15km/h up, however, simply zeroing out all reading <15km/h probably isn't a good idea.

This change also reports the airspeed in km/h (required) to the HoTT transmitter instead of m/s.