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Jupiter GPS NMEA Transmit

 
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TheRidDler



Joined: 13 Jun 2007
Posts: 7

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Jupiter GPS NMEA Transmit
PostPosted: Tue Jul 10, 2007 11:46 am     Reply with quote
Hi all. Im working with a Navman Jupiter 110 GPS module that starts up at defaults of 9600-8-N-1 in NMEA mode. The module needs to be sent a NMEA input command to know when to start acquiring a fix. Else it just outputs empty sentences, except for the satellite message thats seems fine. This is my first time using something like this and it would be great if someone could tell me what message needs to be sent to get the receiver going? I've had a read through the following manual :

Code:
http://www.ekf.de/c/cgps/cg2/inf/nmea_reference_manual.pdf


and it seems that the code needed to produce the GPGGA sentence im looking for is "$PSRF103,00,00,01,01*20\r\n"

Ive tried using this in a simple printf statement, but after about 20mins still nothing. Any suggestions please? Is there mayb another command needed that im missing and am i sending the commands in the right way?

Thanks alot!
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Tue Jul 10, 2007 2:56 pm     Reply with quote
Your checksum is wrong. It's got to be 25, not 20.
If the checksum is incorrect, the message will be rejected by the receiver.
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