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Using Navspark as the primary GPS for APM

Posted by Liam Lambkin on June 1, 2014 at 7:57am

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Hi guys,

I bought this little (cheap) GPS module months ago from an indigogo project. I have since received my GPS and was having troubles interfacing it to my APM 2.5.2. I was simply trying to output the serial data into the APM, not porting APM to the skytraq chip.

Here is where I posted my question, http://www.navspark.com.tw/forum/output-to-arducopter. The guys here are very helpful with the info I needed.

It seems that all I needed to do was connect the TXD1 pin (navspark) to the RX pin on the GPS socket (APM) GND to GND and Battery (in) to the 5v output from the GPS socket. Then change the output of the Navspark to 5hz.

I don't know if there is any benefit to running a Navspark over a Ublox, or weather the APM is geared to accept the Beidou sat signals. 

If I have provided any wrong information or if you could provide further info, please let me know in comments below.

-Liam

Tags: gps, navspark
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Comments

  • John Hutchison August 15, 2014 at 8:54pm

    Would be nice if they would combine the G2M1 with the SUP500RR. Still a go to test this combo out tomorrow.

  • John Hutchison August 15, 2014 at 8:54pm

    3701807663?profile=original

  • gervais August 15, 2014 at 1:45pm

    Well, take a look at the LEA datasheet Page 6 : Max. Navigation Update rate LEA 6H : 2Hz ...

    http://www.u-blox.com/images/downloads/Product_Docs/LEA-6_DataSheet...

    So I guess, it probably doesn´t matter, since GPS assys like the 3DR V1.1,1.2 with the 6H are working good (despite the fact that concurrent GPS/GLONASS systems are ringing the bell in 2014)

  • John Hutchison August 15, 2014 at 12:19pm

    Is 1Hz decent enough for a flight envelope of 20-40mph? The lea-6h I use for the primary is set to 5.

  • gervais August 15, 2014 at 9:46am

    Sorry, I was wrong talking about the NMEA message rate, I meant the position update rate. The Venus viewer can read it, but not change it (like @ NavSpark GL) We need a Config program for the G2M1..still stays a great GPS for other purposes though.

  • John Hutchison August 15, 2014 at 9:17am
    Gervais, I only changed the baud and set talker to GP. Tried changing the nmea interval to 5 but it always remains 1Hz. The spec sheet also states that it is 1Hz. Do not currently know if that is acceptable for aerial nav but will try it in manual and see what the logs say after tomorrow's flight. I need to find out where it shows in the logs what GPS rx is being used as the primary.
  • gervais August 15, 2014 at 5:33am

    @John Hutchinson: Thx for your post. I´have noticed, that you own as well the G2M1, which I own as well as the NAVSpark GL (still on the bench, but already working great)

    My question is: How did you configure the G2M1 for the PIX ? With the NAVSPARK viewer, you can set Talker ID as well as BAUD rate, but not the NMEA message interval...as far as I tried .

    With the u-center (which works as well as a viewer for the the NavSpark after enable debug messages), I am recognizing a blinking view with the G2M1, like some output interupt ß

    Regards,gervais

  • Efi Gy July 29, 2014 at 3:12pm

    Thanks John H for the additional info. 

  • John Hutchison July 28, 2014 at 7:41am

    Efi Gy, use gnss viewer. Binary > Configure NMEA message interval. Change it and save sram + flash.

    BTW, wired an HK 900MHz telemetry radio to the datalogging board, plugged in the raw board and put a power supply on it and now have a remote RTK base station!

    Mark, are you familiar with using correction via RTKLib?

  • Efi Gy July 28, 2014 at 3:59am

    Liam,

    Can please tell me how did you change the output frequency to 5hz?

    rgds

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