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  • 3D Robotics
    Chris Anderson September 8, 2010 at 6:43pm
    Geoff,

    That line switches it into binary. You won't be able to see the data once it's binary (although we should revise the test so that it goes through the binary parser and emerges as data that you can see.) You're just catching the code in the midst of revisions....normal alpha issue.
  • Andre S September 5, 2010 at 1:10pm
    I edited the function GPS_MTK_Class::Init(void) so that the last few lines are

    // Initialize serial port
    #if defined(__AVR_ATmega1280__)
    Serial1.begin(38400); // Serial port 1 on ATMega1280
    delay(500);
    Serial1.print("$PGCMD,16,0,0,0,0,0*6A\r\n");
    delay(500);
    Serial1.print("$PGCMD,16,0,0,0,0,0*6A\r\n");
    #else
    Serial.begin(38400);
    #endif

    I'm no expert on serial ports but this seemed to fix the problem, not sure why..
  • 3D Robotics
    Chris Anderson September 5, 2010 at 12:50pm
    Andre: Yes, the power available via USB is limited, especially when you've got servos connected. That will all be fine when you're powering via the RC system, as you will be in the plane.

    Could you post the code where you added the delay? I'll test and incorporate if it improves performance.

    Also note that the switch to binary currently puts it at 1Hz update rate. We'll change that to the normal 10Hz in the next day or two, with the next rev of the library.
  • Andre S September 5, 2010 at 11:27am
    Hi,

    Great, thanks a lot. With the new firmware I also get the right coordinates. I noticed that although the switch command to binary mode is in the GPS_MTK.cpp it (sometimes?) would not switch and stay in NMEA. So I repeated the switch and added some delay which seems to fix the problem. Wondering if I'm the only one. Also, it seems that when I power the APM from USB the mediatek has more problems finding a fix indoors than when powered from battery (something related to current drain over the USB port and antenna sensitivity maybe??) Anyway.. thanks for the bugfix!
  • Earl September 3, 2010 at 5:31pm
    Looks like it fixed my bad MTK.
    Thanks
    Earl
  • Developer
    Jordi Muñoz September 3, 2010 at 5:24pm
    Hello Alex,

    After now yes. But anyway I still don't know if the firmware works fine...
  • Fabien Bruning September 3, 2010 at 2:22pm
    Thanks, I got the right coordinates this afternoon.

    Sorry can't test anything else, my UAV flew away :(
  • Alex McEwan September 3, 2010 at 1:18pm
    Will all the units from the store from now on have the updated firmware?
  • Steve Oliver September 2, 2010 at 9:32pm
    Thanks Chris!
  • 3D Robotics
    Chris Anderson September 2, 2010 at 9:31pm
    Steve: Yes, I think that would work. Try the sketch in the manual here.
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