Re: [Paparazzi-devel] Altitude estimation

[Felix Ruess]

Hi,

what exact ./paparazzi_version are you running?

In the fixedwing firmware prior to v5.3_devel-28-ga1ade09 the baro was read at PERIODIC_FREQUENCY which would be too fast for the MS5611.

In master there is now also a separate baro timer for that which defaults to 50Hz. Also just pushed that to v5.2: https://github.com/paparazzi/paparazzi/commit/b73be2f780759c340e40165fb8754a8280dea121

Cheers, Felix

On Tue, Sep 30, 2014 at 6:57 PM, afishindouban <address@hidden> wrote:

I am quit sure it is not housing or light problem, because I try to cover it
and result are the same.
Also you can see the Baro raw output even with one or two fault in 10 mins,
it should not cause estimator.Z has that big amount of fault. so I say the
BARO RAW is acceptable. but estimator.Z has problem.

the Chinese AP has many different version, some are using BMP85, but the one
I have is using MS5611,
But I guess the Chinese one MS5611 is not really, maybe a copy, otherwise
the precision can not be different. Am I right ? who know. But I think it
works :D just quality different :D it is enough to fly with my fix-wing. Now
it is hard to buy the newest Lisa/MX board, not too much provider, and all
out of stock. So have to fly with low quality one.

If you want to buy it, try to find it in Taobao, or write me a message I can
help you.

kevin


Hwarm wrote
> Hi,
> there are two different housings for the pressure sensor:
> 1. on is made of metal 2. one is made of white plastic.
> The second one reacts on sun light we found.
> Have the china LisaM  the bmp85 sensor  from Bosch?
> Where can i by the this LisaM?
>
> Regards
> Heinrich Warmers





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