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 LK8000 International Support
 BUG reporting and solved list
 EXTERNAL WIND INVERTED (NOBUG)
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Alessandro_1978
Pulcino

15 Posts

Posted - 11/03/2019 :  10:17:23  Show Profile  Reply with Quote
Hi
my setup has LXNav S100 & Lk8000 with LXV7_EXP driver.

the latest S100 Firmware allow the PDA receiveing external wind.

the problem is the wind direction is inverted (180 degrees)

Alessandro

Edited by - AlphaLima on 17/03/2019 21:24:24

AlphaLima
Moderator

Germany
1597 Posts

Posted - 11/03/2019 :  22:37:12  Show Profile  Visit AlphaLima's Homepage  Reply with Quote
Interesting, where is the windvector inverted? On the S100 compared to LK8000?

None of the V7 drivers take Windinformation from the LXNav devices. The only driver taking wind deliverd by $LXWP0 sentences is the LX dirver.

As far as I remember, the LX devices show the angle relative to the glider heading where the wind is comming from. But the manual is quite unclear about the wind direction http://www.lx-avionik.de/wp/download/manuals/LXS8xS10xManualEnglishVer0626.pdf
Also the LXNav dataport spec. does not specify the wind vector reference delivered by the $LXWP0 sentences (relativ to heading, blowing from, going to).

LK8000 calculates the wind direction where the wind is "blowing from" referenced to geographic north (e.g. 225 = wind comming from SW).
And thats what I would expect to be deliverd by the instrument as well, since it is used most commonly this way.

We don't have a LXNav device So I need an NMEA log of flights with significant wind to verify/implement this.


Edited by - AlphaLima on 14/03/2019 22:05:06
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Alessandro_1978
Pulcino

15 Posts

Posted - 16/03/2019 :  18:45:17  Show Profile  Reply with Quote
Hi AlphaLima
the latest firmware release has the NMEA output with wind.
according to LXNAV email, in their NMEA sentence the wind is called LXWP0

today i recorded a NMEA flow
how can i send you the file?

Alessandro
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AlphaLima
Moderator

Germany
1597 Posts

Posted - 16/03/2019 :  20:06:54  Show Profile  Visit AlphaLima's Homepage  Reply with Quote
AlphaLima (at) lk8000 (dot) it
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AlphaLima
Moderator

Germany
1597 Posts

Posted - 17/03/2019 :  21:24:08  Show Profile  Visit AlphaLima's Homepage  Reply with Quote
OK, got it! Wind via LXWP0 has the same direction definition as in LK8000 speed is in km/h.
Implemented in LX16xx, V7, V7_EXP and Nano3 driver for next version.

Edited by - AlphaLima on 17/03/2019 21:25:17
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Alessandro_1978
Pulcino

15 Posts

Posted - 18/03/2019 :  11:59:57  Show Profile  Reply with Quote
SUPER!
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