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MTK3329 GPS on CRIUS AIOP?

Posted by Christoph on October 29, 2012 at 12:52pm

Hi there,

I've got a CRIUS All in one PRO board which is working fine - now I wanted to add GPS to it.

I've got this device:

http://www.goodluckbuy.com/remzibis-osd-poor-mans-osd-10hz-gps-w-usb-cable-for-fpv-uva.html

and want to use the GPS standalone (later I want to try the remzibi OSD as well as a minim osd with this board).

However, I did not have success - I've used the config option AUTO for the gps, but I'm unsure about the baud rate and format... using MTK also doesn't yield anything I always see "NO GPS".

I'm asking here because the GPS seems to be the same as this one:

http://store.diydrones.com/MediaTek_MT3329_GPS_10Hz_Adapter_Basic_p/mt3329-02.htm

Can anyone tell me how I could get this running?

Thanks a lot,

Christoph

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Replies

  • Andrew Radford October 29, 2012 at 11:46pm

    use:

    #define SERIAL2_BAUD 38400 // GPS port

    and

    #define GPS_PROTOCOL GPS_PROTOCOL_MTK16

    The GPS supports 115K and binary, but will start up in 38400 NMEA, then there are some special commands to put it in binary mode.

    This all assumes you have the same firmware on the GPS. To check this, get the 'MTK firmware tools', which allows you to change the firmware, and tweak the GPS etc, You can then confirm what the baud actually is on your PC. I'm not sure where the official source is for this but you can get them here.

  • John Grouse October 29, 2012 at 9:07pm

    Even though I am using the MultiWiiCopter Paris board, you could still hook up MultiWiiCopter's I2C GPS/Mag board to it and then use an OSD which reads the MultiWii serial protocol.  I'm using the Rushduino OSD which connects to the serial port of the Paris MultiWii board.  No need for separate GPS's for the MultiWii GPS functions and the OSD positional feedback.

    Using MultiWii V2.1 this gives me pos hold and RTH as well as a fairly comprehensive OSD with arrows and distance to home.

    You may need to disable the mag on either the MultiWiiCopter I2C_GPS or the CIRUS board.

  • 100KM
    u4eake October 29, 2012 at 3:06pm

    The 3DR mediatek gps has it's own firmware I believe.  If I recall correctly it's in binary mode and at 115200 baud.

    http://code.google.com/p/ardupilot/wiki/MediaTek

    I have also been eyeballing the crius all-in-one.  Seems it has sensors that are just as good as the apm2.5, but at a cheaper price + it can also run multiwii.

    Any idea how flightperformance and stability compare to the apm ?

    Thx !

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