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  4. Can't get data from second imu

Can't get data from second imu

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  • M Offline
    M Offline
    mkriesel
    Regular
    wrote on last edited by
    #1

    Hi, I have a voxl 2 mini on sdk version 1.1.2 and I want to be able to read data off of both imus however I can only get data off of one of the imus, imu_apps. According to the documentation https://docs.modalai.com/voxl2-mini-onboard-sensors/#imus the other imu is imu_px4 but it shows up blank in voxl-inspect-imu imu_px4. I've tried starting px4 and px4-imu-server to fix this but it didn't seem to help. What am I missing to access the second imu. Thanks.

    Eric KatzfeyE 1 Reply Last reply
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    • M mkriesel

      Hi, I have a voxl 2 mini on sdk version 1.1.2 and I want to be able to read data off of both imus however I can only get data off of one of the imus, imu_apps. According to the documentation https://docs.modalai.com/voxl2-mini-onboard-sensors/#imus the other imu is imu_px4 but it shows up blank in voxl-inspect-imu imu_px4. I've tried starting px4 and px4-imu-server to fix this but it didn't seem to help. What am I missing to access the second imu. Thanks.

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

      @mkriesel The PX4 IMU data is only available in PX4. While PX4 is running you can issue the commands px4-listener sensor_accel and px4-listener sensor_gyro to see the data from the IMU. Also, it is likely available via Mavlink or ROS.

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      • Eric KatzfeyE Eric Katzfey

        @mkriesel The PX4 IMU data is only available in PX4. While PX4 is running you can issue the commands px4-listener sensor_accel and px4-listener sensor_gyro to see the data from the IMU. Also, it is likely available via Mavlink or ROS.

        M Offline
        M Offline
        mkriesel
        Regular
        wrote on last edited by
        #3

        @Eric-Katzfey I don't see anything being published in ros and it doesn't seem like anything is being sent on the /run/mpa/imu_px4 pipe. I would like to be able to use both imus in a program I'm writing so is there a way to get the data out like imu_apps and outside of px4 or is px4 the only thing that can use that imu?

        Eric KatzfeyE 2 Replies Last reply
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        • M mkriesel

          @Eric-Katzfey I don't see anything being published in ros and it doesn't seem like anything is being sent on the /run/mpa/imu_px4 pipe. I would like to be able to use both imus in a program I'm writing so is there a way to get the data out like imu_apps and outside of px4 or is px4 the only thing that can use that imu?

          Eric KatzfeyE Offline
          Eric KatzfeyE Offline
          Eric Katzfey
          ModalAI Team
          wrote on last edited by
          #4

          @mkriesel The PX4 IMU data is only available in PX4

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          • M mkriesel

            @Eric-Katzfey I don't see anything being published in ros and it doesn't seem like anything is being sent on the /run/mpa/imu_px4 pipe. I would like to be able to use both imus in a program I'm writing so is there a way to get the data out like imu_apps and outside of px4 or is px4 the only thing that can use that imu?

            Eric KatzfeyE Offline
            Eric KatzfeyE Offline
            Eric Katzfey
            ModalAI Team
            wrote on last edited by
            #5

            @mkriesel You would have to write custom PX4 code to export that data to a pipe

            M 1 Reply Last reply
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            • Eric KatzfeyE Eric Katzfey

              @mkriesel You would have to write custom PX4 code to export that data to a pipe

              M Offline
              M Offline
              mkriesel
              Regular
              wrote on last edited by
              #6

              @Eric-Katzfey ok, thank you

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