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  3. Calibration for VOXL SDK 1.1.3

Calibration for VOXL SDK 1.1.3

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  • Phi NguyenP Offline
    Phi NguyenP Offline
    Phi Nguyen
    wrote on last edited by Phi Nguyen
    #1

    I did upgrade the RB5 Flight with VOXL SDK Platform 1.1.3.
    When I try to calibrate the IMU, it happend:

    rb5:/$ voxl-check-calibration
    Calibration File Status:
    Missing /data/px4/param/parameters_mag.cal

    rb5:/$ voxl-calibrate-imu
    ERROR: in json_read_file, config file is empty or unreadable

    ERROR: Malformed calibration file: /data/modalai/voxl-imu-server.cal
    Please make a new calibration file with voxl-calibrate-imu

    ERROR: Neither IMU pipe appear to be open
    Make sure the voxl-imu-server service is running and try again

    and

    voxl-imu-server | Enabled | Not Running

    After calibration with QGroundControl, I realized that the orientation was wrong, I do not exactly which orientation is, it was mentioned in this link https://docs.modalai.com/px4-calibrate-sensors/ is:
    When you click on the Compass or Accelerometer calibration buttons, QGroundControl rightly asks you to confirm the board orientation. If using the PX4 master branch or the ModalAI build 1.10 then use ROTATION_NONE. The default orientation in the parameters file you uploaded before takes this into account. NOTE: the 1.10 release from PX4 for Flight Core is not recommended as there have been fixes including a orientation change.
    Screenshot from 2024-04-22 19-01-25.png
    QGroundControl showed that, Screenshot from 2024-04-22 19-59-44.png
    what should I need to do for the first flight.
    Thank all!

    Eric KatzfeyE 1 Reply Last reply
    0
    • Phi NguyenP Phi Nguyen

      I did upgrade the RB5 Flight with VOXL SDK Platform 1.1.3.
      When I try to calibrate the IMU, it happend:

      rb5:/$ voxl-check-calibration
      Calibration File Status:
      Missing /data/px4/param/parameters_mag.cal

      rb5:/$ voxl-calibrate-imu
      ERROR: in json_read_file, config file is empty or unreadable

      ERROR: Malformed calibration file: /data/modalai/voxl-imu-server.cal
      Please make a new calibration file with voxl-calibrate-imu

      ERROR: Neither IMU pipe appear to be open
      Make sure the voxl-imu-server service is running and try again

      and

      voxl-imu-server | Enabled | Not Running

      After calibration with QGroundControl, I realized that the orientation was wrong, I do not exactly which orientation is, it was mentioned in this link https://docs.modalai.com/px4-calibrate-sensors/ is:
      When you click on the Compass or Accelerometer calibration buttons, QGroundControl rightly asks you to confirm the board orientation. If using the PX4 master branch or the ModalAI build 1.10 then use ROTATION_NONE. The default orientation in the parameters file you uploaded before takes this into account. NOTE: the 1.10 release from PX4 for Flight Core is not recommended as there have been fixes including a orientation change.
      Screenshot from 2024-04-22 19-01-25.png
      QGroundControl showed that, Screenshot from 2024-04-22 19-59-44.png
      what should I need to do for the first flight.
      Thank all!

      Eric KatzfeyE Online
      Eric KatzfeyE Online
      Eric Katzfey
      ModalAI Team
      wrote on last edited by
      #2

      @Phi-Nguyen The magnetometer rotation is specified directly with the magnetometer driver so you don't need to set it with that parameter. The /usr/bin/voxl-px4-start startup script will attempt to launch the magnetometer driver with the -R 10 option to specify the rotation.

      Eric KatzfeyE 1 Reply Last reply
      0
      • Eric KatzfeyE Eric Katzfey

        @Phi-Nguyen The magnetometer rotation is specified directly with the magnetometer driver so you don't need to set it with that parameter. The /usr/bin/voxl-px4-start startup script will attempt to launch the magnetometer driver with the -R 10 option to specify the rotation.

        Eric KatzfeyE Online
        Eric KatzfeyE Online
        Eric Katzfey
        ModalAI Team
        wrote on last edited by
        #3

        @Eric-Katzfey So you probably just need to do the magnetometer calibration procedure to be ready for flight.

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