0 Altitude Hold using sonar sensor Posted by Sugeng Priyono on January 11, 2012 at 6:20am now I currently use sonar that I used for the Altitude hold, can it work....????because when I saw the feature of APM sensor used for altitude hold is Barometer You need to be a member of diydrones to add comments! Join diydrones Email me when people reply – Follow
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Both are used. Sonar for low altitude, Barometer for high altitude.
If you move to APM2, you'll find it has a much improved barometer..so much better than you may decide that you don't need a sonar.