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    Preflight Fail: Compass Sensor 0 missing

    Starling & Starling 2
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    • Eric KatzfeyE
      Eric Katzfey ModalAI Team @Nitin Varma Vegesna
      last edited by

      @Nitin-Varma-Vegesna If you are just flying in manual or altitude hold modes then those shouldn't be an issue.

      Nitin Varma VegesnaN 2 Replies Last reply Reply Quote 0
      • Nitin Varma VegesnaN
        Nitin Varma Vegesna @Eric Katzfey
        last edited by

        This post is deleted!
        Nitin Varma VegesnaN 1 Reply Last reply Reply Quote 0
        • Nitin Varma VegesnaN
          Nitin Varma Vegesna @Nitin Varma Vegesna
          last edited by

          This post is deleted!
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          • Nitin Varma VegesnaN
            Nitin Varma Vegesna @Eric Katzfey
            last edited by Nitin Varma Vegesna

            @Eric-Katzfey What about autonomous control indoors, and how could that be fixed if it's an issue? This is with a new GPS as well. Do I have to configure anything? Also, for the EKF2_GPS_CTRL, I reset to default: 7

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            • Nitin Varma VegesnaN
              Nitin Varma Vegesna @Nitin Varma Vegesna
              last edited by Nitin Varma Vegesna

              @Eric-Katzfey Screenshot 2026-02-03 at 11.46.43 PM.png

              Here is an image of when I start autonomous exploration (not flying yet) but moving it with hand, I am getting these preflight errors that I used to not get.

              This is with SYS_HAS_GPS, and SYS_HAS_MAG to 1, EKF2_MAG_TYPE = Automatic, EKF2_GPS_CTRL = 7

              Also, voxl-inspect-gps is saying NO GPS for fix type:

              dt(ms) |fix type|Sats|Latitude(deg)|Longitude(deg)| Alt(m) |Vel(m/s)|HorErr(m)|AltErr(m)|
              129.5 | NO GPS | 0 | 0.0000000 | 0.0000000 | -17.0 | 0.00 | 4294967.295 | 4092465.408 |^C

              Eric KatzfeyE 1 Reply Last reply Reply Quote 0
              • Eric KatzfeyE
                Eric Katzfey ModalAI Team @Nitin Varma Vegesna
                last edited by

                @Nitin-Varma-Vegesna If you re-install or update your SDK to the latest it will properly set all of the parameters.

                Nitin Varma VegesnaN 1 Reply Last reply Reply Quote 0
                • Nitin Varma VegesnaN
                  Nitin Varma Vegesna @Eric Katzfey
                  last edited by

                  @Eric-Katzfey I would rather not delete everything outside of /data/, is there a way to reset the params of px4 another way? This issue only happens when I start exploration, and I move the drone up with my hand slightly, but why do I get FCU: Vision Failure.

                  Eric KatzfeyE 1 Reply Last reply Reply Quote 0
                  • Eric KatzfeyE
                    Eric Katzfey ModalAI Team @Nitin Varma Vegesna
                    last edited by

                    @Nitin-Varma-Vegesna You can set parameters via voxl-configure-px4-params.

                    Nitin Varma VegesnaN 1 Reply Last reply Reply Quote 0
                    • Nitin Varma VegesnaN
                      Nitin Varma Vegesna @Eric Katzfey
                      last edited by

                      @Eric-Katzfey That is what I did to reset the params prior to this happening.

                      Eric KatzfeyE 1 Reply Last reply Reply Quote 0
                      • Eric KatzfeyE
                        Eric Katzfey ModalAI Team @Nitin Varma Vegesna
                        last edited by

                        @Nitin-Varma-Vegesna Well, that's why I asked you to do the full SDK installation. If you install the SDK and set it up as we do from the factory then it should be working like when you first got it. If it doesn't then that potentially points to some damage caused by the crash and not some configuration change you have made since then.

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