Hello,
i tried to build this 10hz GPS antenna. I tried to pair with Racechrono, but it doesn't work.
with the Android app Serial Bluetooth i tried to connect on the DIYAntenna directly, this is the output:
09:00:40.479 $GNRMC,,V,,,,,,,,,,N*4D
09:00:40.479 $GNVTG,,,,,,,,,N*2E
09:00:40.479 $GNGGA,,,,,,0,00,99.99,,,,,,*56
09:00:40.479 $GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*2E
09:00:40.586 $GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*2E
09:00:40.586 $GPGSV,1,1,00*79
09:00:40.586 $GLGSV,1,1,00*65
09:00:40.610 $GNGLL,,,,,,V,N*7A
09:00:41.759 $GNRMC,,V,,,,,,,,,,N*4D
09:00:41.759 $GNVTG,,,,,,,,,N*2E
09:00:41.759 $GNGGA,,,,,,0,00,99.99,,,,,,*56
09:00:41.759 $GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*2E
09:00:41.811 $GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*2E
09:00:41.811 $GPGSV,1,1,00*79
09:00:41.811 $GLGSV,1,1,00*65
09:00:41.835 $GNGLL,,,,,,V,N*7A
09:00:42.494 $GNRMC,,V,,,,,,,,,,N*4D
09:00:42.494 $GNVTG,,,,,,,,,N*2E
09:00:42.494 $GNGGA,,,,,,0,00,99.99,,,,,,*56
09:00:42.494 $GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*2E
09:00:42.584 $GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*2E
09:00:42.584 $GPGSV,1,1,00*79
09:00:42.584 $GLGSV,1,1,00*65
09:00:42.606 $GNGLL,,,,,,V,N*7A
Have you any suggestions?
Thanks a lot
Bye
Luca from Italy
Comments
thank you.
16:40:52.547 $GPGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*30
16:40:52.547 $GPRMC,,V,,,,,,,,,,N*53
16:40:52.547 $GPVTG,,,,,,,,,N*30
16:40:52.637 $GPGGA,,,,,,0,00,99.99,,,,,,*48
16:40:52.637 $GPGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*30
16:40:52.637 $GPGSV,1,1,00*79
Do you think could be right?
Thanks
before making the changes you suggested, I performed a factory reset through the U-CENTER interface.
Now it never locks on any satellite.
Tips?
Thank you
In U-Center I did a CFG - "Revert to default configuration". Then it takes many minutes to get a lock to satellites again, even if you send the Almanac through 'A-GPS'.
While my USB-GPS receivers function flawlessly (but not with RaceChrono - I should try to connect them to my phone!), my GPS module connected through a USB-serial connector behaves erratically in U-Center. A-GPS data is not always kept and the newer constellations (Beidou, Galileo) are not reported - but I think they are received.
Also if you remove the GxGSV(?) records, U-Center does not report the satellites. So it may look like it is not receiving, but it does use them to calculate position.
* RMC and GGA are mentioned above: these 2 are pretty standard for a complete positioning decoding (HLT uses these)
* GSA and GSV are used when available to display the constellation of satellites, perhaps optional? If used, can they be sent with a lower frequency (e.g. every 1, 2, 5 secs)?
* I see that sending GPS, Glonass, and Galileo works - is anything but GP ignored? Should other talker be changed into GP talker id?
* is GBS used?
Thank you!
- GSA+GSV are optional
- Sentences need to start with $GP
- GBS sentence is not used (as stated above)
Hi,
I found the solution.
The problem was the internal GPS antenna.
I tried to connect a simple electricwire and now it works.
this is my output on RaceChrono https://ibb.co/Bzp0Pj2
it seems to be right, but I notice that the GPS update is not stable (14Hz is the GPS setting) it alternates between 6 and 13hz.
Is it normal? Could be the of the serial communication? Now it is set 9600
Thanks
Regards
Good morning to all
It also does the same thing to me, I configured the GPS to 10Hz but on race chrono it oscillates between 7 and 10hz.
The bluetooth module baudrate is set to 38400 as well as the gps serial output.
Doing some tests it seems that this happens only by communicating with the smarphone, I also tried connecting it to the computer via bluetooth and in that case the frequency is stable at 10hz.
How did you guys solve the problem?