Help! MediaTek Problems

Comm problems seem to be drawn to me.  This time it appears to be an issue with comm between the GPS and the APM.  I reliably get a solid blue light on the MediaTek, indicating GPS lock I believe, but the red LED (C) on the APM doesn't light up.  I'm running the ArduPiratesNG release 458 (latest one available for download on their wiki).  Best I can tell, there's no way to know what firmware is loaded on the GPS, but I see the same behavior if I configure for 1.4 or 1.6.

 

My first thought was that it's a GPS firmware problem and I need to reload the firmware as instructed on the wiki (gotta buy a friggin' FTDI cable, ARGH).  But then I saw this post, which led me to believe that there might be some versions of the code floating around where LED C isn't functioning correctly???

 

I've also read multiple insinuations that there's some way to test the GPS via CLI, but I can't find instructions on how to do so for the life of me.  Then I found this post on RCG and ran knuckles' code, whose result was a bunch of gibberish on the serial monitor.  Here's a sample:

 

Ö f¡ÎÐÝ âá´ûùz_M × ~±§ÐÝ âá´ûùz_M Ø ©"ÐÝ âß´ûùz_M Ù ~¢ÝÐÝ âß´ûùz_M Ú ÐÝ âß´ûùz_M Û ÐÝ âß´ûùz_M zÜ fz<ÐÝ âÞ´ûùz_M tÝ fuÐÝ âÞ´ûùz_M nÞ fq

 

And as a longshot, per this post, I've hit the reset button after getting a lock while configured for both 1.4 and 1.6 ... with no luck.

 

Any ideas?

 

... I think my head is going to explode :) ...

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Replies

  • I am running the RC2 coding for my Quad.

     

    I have the Solid blue led on the mediatek GPS but the Red led on APM will be kept blinking. Does it meant the APM didnt recognise the GPS lock from GPS?

  • 3D Robotics
    There's always the possibility of a bad GPS cable. Which one are you using? Do you have another you can test?
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