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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 None

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

        @Nitin-Varma-Vegesna I think it's this one: https://store.3dr.com/mini-gps-ublox-max-m10s/

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

          @Eric-Katzfey Ok, thank you!

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

            @Eric-Katzfey Now, it arms successfully, even though it says Preflight Fail: heading estimate not stable and Preflight Fail: Yaw estimate error. Is this an issue?

            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 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!
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                • 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.

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