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Re: [Paparazzi-devel] HELP telemetry message with long and lat

From: Stephen Dwyer
Subject: Re: [Paparazzi-devel] HELP telemetry message with long and lat
Date: Thu, 6 Sep 2012 14:06:57 -0600

Hi Cedric,

I *think* that unless the GPS is sending the correct message (LLH
Position message, check ublox manual), then the LLH data is not
updated beyond the initialization value of 0. So you would probably
have to add some code or modify the gps configuration to send that
messsage. The new state interface in master branch might make this
much easier (haven't looked at the code yet).

Is there a particular reason you need to send lat-long, as opposed to
UTM data, which can easily be converted afterwards?

Sorry I couldn't be of more help (and I might be wrong).

-Stephen Dwyer

On Thu, Sep 6, 2012 at 1:47 PM, Cedric Marzer <address@hidden> wrote:
> So nobody had a clue that would help me ?
> Le 5 sept. 2012 à 23:18, Cedric Marzer a écrit :
>> Hi all,
>> I have been trying to downlink the gps longitude and latitude but without 
>> success so far (for fixed wing).
>> I have been trying to use the gps_lla and the gps_int messages but the 
>> longitude and latitude I get are all zeros.
>> (btw there is a bug in the ap_downlink.h for the gps_lla message with a line 
>> copied twice that needs to be removed).
>> I have been trying to add USE_GPS in the airframe file but that didn't help…
>> Do you have any idea how to have that working ?
>> Thanks in advance.
>> Cédric
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