Discussions

Mag Sparfun Autodetection don´t work (bug in 38 and 39?)

Posted by druckgott on August 19, 2011 at 4:10am

Hallo, I have a Sparkfun Magnetometer connectet to my Arducopter Mega.

 

If I upload the firmware via arduino it works perfekt, but if I upload it via MP, it do not autodetect the magenetometer.

I always have on X Y Z = 0.

 

I have a converter from 5V to 3,3V for the mag.

 

I have this mag:

http://www.watterott.com/de/Kompass-Modul-HMC5843

 

What could I do to get it working with MP, so I dont have to use arduino?

 

thx

druckgott

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Replies

  • Developer
    Jani Hirvinen August 19, 2011 at 6:19am

    Are you sure that your compass works properly, your signal levels are strong/weak enough. Are you using any level shifters. As SparkFUN magnetometers needs level shifters to work properly.

     

    SFE magnetometer can only work with 3.3 voltage signals, APM signals are 5v.

  • druckgott August 19, 2011 at 6:13am

    Here are some logs, now it works because simple mode works perfekt, but in the MP don´t show the right.

     

    At the End of the flight, the copter goes very hard to the left siede and crashed in Loiter mode, but I don´t know why

    19-08-11 03-09 1.log

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