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  • Mario,

    I've put my project on hold due to other priorities but the last I worked on it was with a MPU-9150 board and code supplied by Pansenti. This worked very well in my quick tests.

    Pansenti has taken down all of their stuff (not sure why) but I found this library on GitHub:
    https://github.com/richards-tech/MPU9150Lib

    There are several MPU9150 breakout boards available.

    Hope this helps.

    • Thank you Al, really appreciated.

      I immediately searched and found an MPU 9150 board at sparkfun  https://www.sparkfun.com/products/11486

      just one detail: do you think per your experience it could be useful to pair this board with a pressure sensor like  https://www.sparkfun.com/products/11084  to give a complete data set to the sw libraries I've seen around for 10 DOF boards ?

      I approached recently the subject and don't know yet if this additional data is actually needed to obtain additional precision, just in case...  :-)

      • I have only used barometric sensors in weather station applications so really don't know.  It depends on whether the pressure is actually fused to the other data by the software.  

        What I was trying to do is to enhance the heading precision and further reduce drift by fusing in GPS heading data.  I never got to that point because of the lack of fusion software to do that and the project went on hold.  My application requires precise and fast heading data.

        • that pressure sensor gives direct compensated reading of altitude in 20-bit measurement (meters): i will check if the recent sw libraries use that.

          i'm also interested in fast and accurate heading data since i will try to log position data and correct from to time to time with gps only if i see it's actually needed.  i've found different opinions on the feasibility so ... will try and see.

          will update this thread once I'll have first results.

          Cheers,

          Mario

  • Hi Al.

    I see that your message is 1 year old, but I'm currently searching for a good IMU solution (hw+sw) and read many of your posts, until I came to this one.  It seems that OpenIMU did not go in production: did you find an alternative solution or did you solve the drift issue with ArduIMU sw/hw ?

    It's now more than 1 week that I'm looking at various boards and would really like to find one for my specific project: I need to log  (on a microSD) all gyro, accel, compass and barometer data for later processing. The logging sensors will be placed on a human subject moving freely (running, jumping, going on a rollerblade, etc.).
    I would also like to log also GPS data for later processing, possibly allowing IMU+GPS data processing to fix intertial errors with GPS data every N seconds.

    I understand that some cumulative error could always be present, but I would love to avoid wasting money on devices that do not even allow the software processing with usual algorithms because of excessive continuous drift at the source (if I'm correctly interpreting some forum and blog posts around the web).

    Mario

  • This is very sad what i found here:

    http://www.multiwii.com/forum/viewtopic.php?f=8&t=649&start...

    " I am very saddened to tell you that Fabio Varesano, the manufacturer of FreeImu died on Christmas Day.
    He was only 27 years of age.
    This morning we attended his funeral.
    I remember him as a friend with a great desire to try and help others. "

    ....

    " No he was not sick, a cerebral infarction. "

    I am speakless - my deep condolences to the family.

    Rob

    MultiWii
    MultiWii project related stuffs
  • Al,
    Am I supposed to use that calibration.h you supplied and/or am I supposed to run the calibration application?

    Thanks for the gyro fix.

    Dave
  • Sorry to be asking simple questions, but do we still use the Arduino IDE with this code? I got lost with the discussion about Python since I don't have/use that. Where should we download a version that should work for ArduIMUv3 and the Arduino 1.1 IDE. Thanks for the help!

     

    Dave

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