bu-353 satellite fix problem, no fix anywhere !

jheeno · 01-19-2008, 03:14 AM

hey everyone, apart from having the most updated drivers for the bu-353, when i load GPS information the software provided,
and centrafuse, my bu-353 seems to not get a fix anywhere outside and even at different locations no matter how long it scans,

anyone have any ideas or have I bought a faulty bu-353 ?
the thing i I did have a dodgy ebay gps receiver, at that manages to establish a signal when in gps mode for centrafuse ...
have I dont something wrong ?
settings are correct with baud of 4800, 8 bits stop bit 1, and parity none,

com port correctly detected aswell GPS information seems to not get any fix at all

DarquePervert · 01-19-2008, 06:46 AM

Can you open up a terminal (like HyperTermnal built into XP) ont hat COM port? If you do you should see the raw data stream from the GPS, even if it's not getting a lock.
If you're getting gibberish or nothing at all, your BU353 may be defective.

jheeno · 01-19-2008, 06:57 AM

i am getting a stream of data from GPS information, most times in the other window i get satellite numbers with green and red circles but no lock http://img72.imageshack.us/img72/5850/gpsmd3.jpg

heres a sample of the raw dump i get from GPS information

$GPGSA,A,1,,,,,,,,,,,,,,,*1E
$GPGSV,3,1,12,24,83,340,28,09,83,161,29,21,38,323, ,29,30,224,*71
$GPGSV,3,2,12,26,30,005,,06,29,225,,15,24,325,,10, 23,075,*75
$GPGSV,3,3,12,02,22,145,,05,21,181,,30,12,196,,18, 08,319,*72
$GPRMC,115421.949,V,,,,,,,190108,,*28
$GPGGA,11542

heres a sample of what i get from the hyperterminal

†`````````xffx``````x`ff`ffff```````f````
``````f``````f````````````````````f``
```````````

DarquePervert · 01-19-2008, 07:38 AM

Well, that's not NMEA data. That's Sirf data, I believe.
You need a tool to switch from SIRF mode to NMEA mode so your GPS application can read the NMEA data.

SIRFDemo can do this, I'm pretty certain.