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GPS - Module Jupitor 31 - Navman Not getting valid data

rajeesh

Jul 7, 2010
1
Joined
Jul 7, 2010
Messages
1
Hi,

I am using at91rm9200dk board
I am using Jupitor 21 Gps module it is working fine
Then I changed the GPS module to high performance one Jupitor 31 .
Now I am not getting valid data.

Please see the data I am getting from gps via serial port
Any body have the hardware connection of Jupitor 31 please send me
Please help me.

$GPGGA,235949.054,,,,,0,00,,,M,0.0,M,,0000*57
$GPGSA,A,1,,,,,,,,,,,,,,,*1E
$GPRMC,235949.054,V,,,,,,,070707,,*29
$PRWIZCH,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0*4D
$GPGGA,235950.049,,,,,0,00,,,M,0.0,M,,0000*53
$GPGSA,A,1,,,,,,,,,,,,,,,*1E
$GPGSV,3,1,12,20,00,000,,10,00,000,,31,00,000,,27,00,000,*7C
$GPGSV,3,2,12,19,00,000,,07,00,000,,04,00,000,,24,00,000,*76
$GPGSV,3,3,12,16,00,000,,28,00,000,,26,00,000,,29,00,000,*78
$GPRMC,235950.049,V,,,,,,,070707,,*2D
$PRWIZCH,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0*4D
$GPGGA,235951.045,,,,,0,00,,,M,0.0,M,,0000*5E
$GPGSA,A,1,,,,,,,,,,,,,,,*1E
$GPRMC,235951.045,V,,,,,,,070707,,*20
$PRWIZCH,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0*4D
$GPGGA,235952.051,,,,,0,00,,,M,0.0,M,,0000*58
$GPGSA,A,1,,,,,,,,,,,,,,,*1E
$GPGSV,3,1,12,20,00,000,,10,00,000,,31,00,000,,27,00,000,*7C
$GPGSV,3,2,12,19,00,000,,07,00,000,,04,00,000,,24,00,000,*76
$GPGSV,3,3,12,16,00,000,,28,00,000,,26,00,000,,29,00,000,*78
$GPRMC,235952.051,V,,,,,,,070707,,*26
$PRWIZCH,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0*4D
$GPGGA,235953.048,,,,,0,00,,,M,0.0,M,,0000*51
$GPGSA,A,1,,,,,,,,,,,,,,,*1E
$GPRMC,235953.048,V,,,,,,,070707,,*2F
$PRWIZCH,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0*4D
$GPGGA,235954.049,,,,,0,00,,,M,0.0,M,,0000*57
$GPGSA,A,1,,,,,,,,,,,,,,,*1E
$GPGSV,3,1,12,20,00,000,,10,00,000,,31,00,000,,27,00,000,*7C
$GPGSV,3,2,12,19,00,000,,07,00,000,,04,00,000,,24,00,000,*76
$GPGSV,3,3,12,16,00,000,,28,00,000,,26,00,000,,29,00,000,*78
$GPRMC,235954.049,V,,,,,,,070707,,*29
$PRWIZCH,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0*
 

davenn

Moderator
Sep 5, 2009
14,254
Joined
Sep 5, 2009
Messages
14,254
Hi Rajeesh

I do play with GPS units a little. I mainly use them for a source of an accurate frequency that I can lock a 10MHz oscillator to.
I have dabbled with the NMEA data string from the Jupiter T receiver boards, its not too dificult to decode and display date time location etc on a small LCD screen.

In your case I'm wondering if the data string from the Jupiter 31 is slightly different to the 21 receiver and thats why the code in your MCU isnt recognising what it is seeing.
You may need to do some investigating to see what differences there are between your 2 receivers and alter the code in the AT91xxx to suit

cheers
Dave


the data below.... is that from the 21 or the 31 ?? have you compared them both yourself ?
what differences can you see ??

Hi,

I am using at91rm9200dk board
I am using Jupitor 21 Gps module it is working fine
Then I changed the GPS module to high performance one Jupitor 31 .
Now I am not getting valid data.

Please see the data I am getting from gps via serial port
Any body have the hardware connection of Jupitor 31 please send me
Please help me.

$GPGGA,235949.054,,,,,0,00,,,M,0.0,M,,0000*57
$GPGSA,A,1,,,,,,,,,,,,,,,*1E
$GPRMC,235949.054,V,,,,,,,070707,,*29
$PRWIZCH,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0,00,0*4D
$GPGGA,235950.049,,,,,0,00,,,M,0.0,M,,0000*53
$GPGSA,A,1,,,,,,,,,,,,,,,*1E
$GPGSV,3,1,12,20,00,000,,10,00,000,,31,00,000,,27,00,000,*7C
SNIP
 
Last edited:

davenn

Moderator
Sep 5, 2009
14,254
Joined
Sep 5, 2009
Messages
14,254
Hi Rajeesh,

no posts from you for a few days..... have you read the data stream from the other GPS unit yet. If so how did the 2 of them compare ?

Dave
 
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