Re: [Paparazzi-devel] LEA-5H NoFix Issue

[Pat Hickey]

I've had a similar issue with that model GPS: I found, finally, that
the current available from the power supply seems to matter. Check
your power supply and make sure it isn't dipping down too far when you
attach the GPS.

On Thu, Mar 4, 2010 at 11:25 AM, address@hidden
<address@hidden> wrote:
> Hello everybody,
>
> I'm getting a odd issue when trying to get a GPS Fix in the Paparazzi GCS. In 
> U-center I can get a 3d fix in ca. 30
> secs no issues, but in the GCS it's never able to get a fix. It finds 
> multiple servers, the signal strength goes up to
> ~40dB and after a couple seconds the signal dies again and the GCS moves on 
> to the next server over and over again. The
> bars stay red until the signal dies, then they turn grey. In u-center the 
> message output looks great (to me), in the
> GCS only some messages do display a value and those are pretty unrealistic.
>
>
>
> This is from my airframe.xml;
>
> [...]
>
> CONFIG = \"tiny_2_1_1.h\"
>
> [...]
>
> ap.CFLAGS += -DGPS -DUBX -DUSE_UART0 -DGPS_LINK=Uart0 -DUART0_BAUD=B38400 
> -DGPS_USE_LATLONG
>
> ap.srcs += gps_ubx.c gps.c latlong.c
>
>
>
> I've tried to:
>
> -reset the GPS module using u-center and load the config file from the Wiki ( 
> http://paparazzi.enac.fr/wiki_images/Tiny_LEA-5H-v5.zip
> ) with no different end result.
>
> -reset the GPS module and configured everything from hand per the Wiki's 
> directions with no different end result.
> -Flash the different Firmware Updates into the gps receiver ( 5.00 / 6.00 / 
> 6.02 )
> with no different end result.
>
>
>
> My setup:
>
> Twog // PPZUAV LEA-5H+active Sarantel Geohelix Antenna //XbeeProSeries2,2.4Ghz
>
>
>
> If someone could explain to me what I'm doing wrong I'd highly appreciate 
> that. I'm stuck since days here.
>
> If I shall post the message view output of u-center or my whole 
> airframe-config file just tell me what you need.
>
>
>
> Regards,
>
>
>
> Nico
>
>
>
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