Good day guys !!  

I feel the need to obtain the information from my PixHawk in my Graupner MZ-24 screen. I found
some threads talking about a change in arducopter firmware to run the telemetry, not good at messing original controller firmware.

Then I found an "adapter" that staff of the AutoQuad made to convert the MavLink in Hott telemetry.

I come here to share a few changes I made in the project Mav2Rott downloaded here: http://autoquad.org/software-downloads/?did=31.
This is an adaptation to send the telemetry PixHawk for Graupner Hott Protocol.

Is correct with some features:

Battery Voltage;
Altitude for barometer;
Satellite count Speed;
Flight Modes Current drawn by the motor;
Direction of the Head;

I am not able to make it work:

Correct display Latitude and Longitude;
Distance of Home;
Direction of Home;

If anyone can help thank you very much.
The project is attached to the topic. The connections are equal to the jd-ioboard. I am using an Arduino Pro Mini.

Mav2HoTT_NoLeds.zip

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Replies

  • gr24


    Michel Kosloff said:

    I have positive report with MZ-24. Which receiver do you use?

    Please consult documentation here http://mediamax.pro/MAVLink2HoTT

    You shouldn't tune anything in FC. All tuning is done via HoTT text menu.

    hüseyin yıldız said:

    i have tried with mz24 but not succes.

    any configuration on pixhawk?

    it shows gps data but no other info?

  • Your idea is a good approach, maybe a little extended: 

    If movement in air about <min> km/h and about <min> satellites show GPS direction else show compass yaw. 

    This will avoid changing direction on copters with weak GPS signal when hovering (there is always statistical movement without useful direction vector). 



    Michel Kosloff said:

    May show compass yaw when on ground / disarmed and GPS travel direction in air.

    Hannes said:

    Thank you, coordinates are now correct, perfect.

    The flight-direction may need some more thoughts and discussion.

  • I have positive report with MZ-24. Which receiver do you use?

    Please consult documentation here http://mediamax.pro/MAVLink2HoTT

    You shouldn't tune anything in FC. All tuning is done via HoTT text menu.

    hüseyin yıldız said:

    i have tried with mz24 but not succes.

    any configuration on pixhawk?

    it shows gps data but no other info?

  • May show compass yaw when on ground / disarmed and GPS travel direction in air.

    Hannes said:

    Thank you, coordinates are now correct, perfect.

    The flight-direction may need some more thoughts and discussion.

  • Thank you, coordinates are now correct, perfect.

    The flight-direction may need some more thoughts and discussion.

  • i have tried with mz24 but not succes.

    any configuration on pixhawk?

    it shows gps data but no other info?

  • Thank you for you testing.

    I set both fields in GPS message:

    flight_direction contains GPS course (not current yaw, but real movement direction form GPS)

    and

    angle_compass is set to current yaw.

    I don't know what RCs display both fields, but my MX-16 and MX-20 RCs do display flight_direction. I've got some reports of correct work of this code with MZ-24 RC, but I still don't know which data fields it does display. Regardless of display, RC logs all data to flash card, but I never used those logs in real life.

    I thought if flying copters it's better to show real movement direction as copter may fly any side ahead.

    If flying plane (code supports both) this is also informative as it shows real travel direction including wind influence.

    If this is critical I can make this parameter configurable via text menu.

    I renamed flight modes as you requested and modified coordinates calculations according to your example.

    I upload new HEX for you now, but I made it without testing as I have only my laptop with me now.

    Though I'd like to ask you do some testing and report results.

    Regards,

               Michel.

    MAVLink2HOTT-v1.4.1.hex

  • Loaded today MAVLink2Hott 1.4 into a pro mini board.

    It works great with my MC32 and GR-16. 

    The first thing I noticed is that the GPS coordinates are not correct: Graupner Display shows coordinates in dd° mm.mmm' format.

    When you compare the position from missionplanner in dd.ddddd° format at this website: http://gpso.de/maps/ with position from transmitter display, you will notice different locations. 

    You can find my conversion function https://github.com/j-lang/MAVLink2Hott/blob/master/Functions.ino from line 130. 

    Which direction shows the "DIR:" field? My copter is oriented to north, missionplanner shows 11° and DIR: 196°? Home-direction shows 0 because copter is on ground.

    Thank you for making the interface configurable via textmode!

    Can you change old flightmode "hybrid" to new "position hold"?

     

  • Version 1.4 released. Many bugs fixed.

    Newer documentation will be available at http://mediamax.pro/MAVLink2HoTT/ in few days.

    MAVLink2HOTT-v1.4.hex

    MAVLink2HoTT
  • Current version uses 85% of code memory and 55% of RAM. I don't think integration with MINIMOSD is possible. May be with newer CPU.

This reply was deleted.

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