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09-27-2006, 03:59 AM
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#1
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Newbie
Join Date: Sep 2006
Posts: 7
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NMEA Decoding?
I want to ask if some one have decode the NMEA standard signal generated by the GPS receiver, using microcontroller(preferable) or the serial port with his own software?
If someone do this thing, please send me the details and the steps to do this brililiant thing.
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09-27-2006, 04:07 AM
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#2
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My Village Called
Join Date: Jul 2004
Location: Berkeley, CA
Posts: 10,517
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09-27-2006, 04:34 AM
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#3
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Newbie
Join Date: Sep 2006
Posts: 7
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Yea, i have read about the NMEA, but still there are some questions.
One of them, 4800 baud per second, how much the baud is? and is the "no parity" bit sent or not?
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09-27-2006, 04:50 AM
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#4
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Constant Bitrate
Join Date: May 2004
Location: Sweden
Posts: 151
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09-27-2006, 04:51 AM
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#5
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My Village Called
Join Date: Jul 2004
Location: Berkeley, CA
Posts: 10,517
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Quote: Originally Posted by Hamzeh  Yea, i have read about the NMEA, but still there are some questions.
One of them, 4800 baud per second, how much the baud is? and is the "no parity" bit sent or not?
Try it with hyperterminal first and see.
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12-12-2006, 05:44 PM
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#6
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Newbie
Join Date: Dec 2006
Location: Belgium, Lokeren
Posts: 55
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If still needed :I did some test with a PIC 18F455 and an LCD display.
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12-12-2006, 05:50 PM
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#7
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Raw Wave
Join Date: Apr 2005
Location: Boston, MA
Posts: 1,800
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Take a look at the Perl Library, GPS::NMEA
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03-12-2007, 04:26 AM
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#8
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Newbie
Join Date: Mar 2007
Posts: 5
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LAssen Lp GPS NMEA data
Quote: Originally Posted by 0l33l Try it with hyperterminal first and see.
Pls let me know , how to enable the NMEA data out in Lassen LP GPS module using Hyperterminal
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03-12-2007, 05:05 AM
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#9
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FLAC
Join Date: Apr 2006
Location: Washington, DC - Alexandria, VA N/W Area - NOVA
Posts: 1,268
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Quote: Originally Posted by secmem Pls let me know , how to enable the NMEA data out in Lassen LP GPS module using Hyperterminal
Create a new connection, specify the port, speed,settings = 4800, 8, N, 1 (or something like that.. )
Save it, Hit connect. You should start seeing the GPS/NEMA sentences flying by... 
Last edited by W3bMa5t3r; 03-12-2007 at 05:15 AM.
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03-12-2007, 05:37 AM
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#10
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Newbie
Join Date: Mar 2007
Posts: 5
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i couldnot see the NMEA messages but could see only some junk data of symbols..
Quote: Originally Posted by W3bMa5t3r Create a new connection, specify the port, speed,settings = 4800, 8, N, 1 (or something like that.. )
Save it, Hit connect. You should start seeing the GPS/NEMA sentences flying by...
Thanks for the reply....
I did the same as you mentioned, but i couldnot see the NMEA messages but could see only some junk data of symbols..
I even tried with the TSIPMonitor32.exe, but could not get the data in it. Please help me with steps, how to use TSIPMonitor.exe.I even gone through the Lassen LP Manual.
The manual is explained according to the starter kit. but I m not using Starter kit instead I interfaced Lassen LP module to PC serially through Max232.
waiting for the reply..
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03-12-2007, 05:56 AM
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#11
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Newbie
Join Date: Mar 2007
Posts: 5
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The View of the Hyperterminal DATA is attached
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03-12-2007, 06:43 AM
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#12
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FLAC
Join Date: Apr 2006
Location: Washington, DC - Alexandria, VA N/W Area - NOVA
Posts: 1,268
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Quote: Originally Posted by secmem Thanks for the reply....
I did the same as you mentioned, but i couldnot see the NMEA messages but could see only some junk data of symbols..
I even tried with the TSIPMonitor32.exe, but could not get the data in it. Please help me with steps, how to use TSIPMonitor.exe.I even gone through the Lassen LP Manual.
The manual is explained according to the starter kit. but I m not using Starter kit instead I interfaced Lassen LP module to PC serially through Max232.
waiting for the reply..
try adjusting your speed (baud). some receivers send out at 9600
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03-13-2007, 12:21 AM
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#13
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Newbie
Join Date: Mar 2007
Posts: 5
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3.3V Back up Battery is required for the GPS to give NMEA data?
Quote: Originally Posted by W3bMa5t3r try adjusting your speed (baud). some receivers send out at 9600
I have tried for different baud rates, but the junk data remains same. At present i did not connected any backup Battery to the Lassen LP GPS module.Please confirm, whether the 3.3V Back up Battery is required for the GPS to give NMEA data.
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03-13-2007, 02:12 AM
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#14
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Newbie
Join Date: Mar 2007
Posts: 5
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Quote: Originally Posted by W3bMa5t3r Create a new connection, specify the port, speed,settings = 4800, 8, N, 1 (or something like that.. )
Save it, Hit connect. You should start seeing the GPS/NEMA sentences flying by...
Anyone help me in getting NMEA massages in Hyperterminal. I want to know whether Back up Battery is needed for getting NMEA data 
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03-13-2007, 03:01 AM
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#15
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FreeDrive Creator
Join Date: Feb 2004
Location: Manchester
Posts: 3,196
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have you confirmed your device works at all ? looks like its knackered to me
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