Position.Get(Z) returns a large range of values

[deerhunter]

I found that placing the drone stationary on the floor or on a table and running code that only prints Position.Get(Z) returns a large range of values and in fact, it reads a negative value when placed on floor and switched on.

[prasanna.shevare]

Hi,
Yes that is very much an issue. We have found that even on ground the barometric readings chane due to various parameters. The readings are in cm. You may see readings changs from plus or minus 50cm

[deerhunter]

Thank you Prasanna for your quick response, I also saw in the manual – API Reference V2.1.2 that this variation of 50cm is mentioned.
I was trying to set a desired position and encountered that it is unable to maintain the height as I expected and I thought a simple code

—————————————
Command.arm();
DesiredPosition.set(Z, 100);
FlightMode.set(ATLTITUDEHOLD);
—————————————

where as I see in an example code on github https://github.com/DronaAviation/PlutoX-Sample-Codes/blob/master/PlutoX-ClapSensor/PlutoPilot.cpp
it uses Althold.setRelativeAltholdHeight(200); and “Althold.h”, Is this a different library or do you think using the block above should also work fine?

Thank you

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