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    GPS not working for Starling 2 Max

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    • B
      Bernhard @Zachary Lowell 0
      last edited by

      @Zachary-Lowell-0 yes, we test outside.
      The only difference between the Starling 2 and the Starling Max is the 5G board. On the Max we have the 5G board installed, which seems to be the root of the problem.
      We have tried switchen the GPS modules and the VOXL board itself in the meantime, and the GPS always works on the Starling 2, but not on the Max.
      Is there something additional to do when installing the 5G board? We swapped the Wifi module for the 5G module, configured voxl-modem and it works. But GPS does not work with it it seems.

      Besides, output for voxl-px4.conf:

      GPS=AUTODETECT
RC=CRSF
POWER_MANAGER=VOXLPM
DISTANCE_SENSOR=NONE
OSD=DISABLE
DAEMON_MODE=ENABLE
SENSOR_CAL=ACTUAL
EXTRA_STEPS=()
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      • Zachary Lowell 0Z
        Zachary Lowell 0 Dev Team
        last edited by

        I wonder if there is some form of interference - I do know that from time to time when I am in the same situation as you (GPS showing 0's for both lat and lon) I just have to wait it out for like 10 minutes and then after that, the GPS data shows - unsure why it would take that long, but I can say I have recreated this issue in the past and the solution was to wait - @brahim I believe you ran into this and just let the drone sit for a while before gps was acquired.

        I would be hard pressed to say the issue is directly from the 5g hat - all the hardware is tested rigorously together to ensure safe flights and such.

        B 1 Reply Last reply Reply Quote 0
        • B
          Bernhard @Zachary Lowell 0
          last edited by

          For anyone wondering:
          We figured out what the problem was.
          The 5G is not the only source for interferences.

          It turned out the video transmission hardware we use (Siyi MK 32 https://shop.siyi.biz/products/siyi-mk32?VariantsId=10619) blocks the GPS from finding any satellites.

          We will try to somehow shield the GPS from the video transmission signal.

          @Zachary-Lowell-0 FYI

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          • Zachary Lowell 0Z
            Zachary Lowell 0 Dev Team
            last edited by

            @Bernhard said in GPS not working for Starling 2 Max:

            We will try to somehow shield the GPS from the video transmission signal.

            Makes sense to me @Bernhard we have leveraged faraday tape to dull the signals coming off.

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            • B
              Bernhard @Zachary Lowell 0
              last edited by

              @Zachary-Lowell-0 actually I have to correct that statement.

              I have now invested quite some time into testing the whole situation thoroughly.
              The drone's GPS works fine without 5G and video transmission. The drone's GPS has problems with 5G (at least where we are testing - populated area, probably some other interferences). The drone's problem also has a problem with the video transmission.

              So basically, both 5G and video cause the problem. But it does not even work with the 5G module that ModalAI provides. Is there any further help available?

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              • N
                nuallaino @Bernhard
                last edited by

                @Bernhard Maybe our issues are related? See [my post].(https://forum.modalai.com/topic/3912/problem-acquiring-gps-satellites-possible-voxl2-board-emi?_=1731073406011)

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                • B
                  Bernhard @nuallaino
                  last edited by

                  @nuallaino that might be.
                  But for us the GPS-sensor usually works, we only have problems when using 5G and/or video transmission.

                  We will test if an external GPS-sensor fixes the situation.

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                  • K
                    Kory4Drone
                    last edited by

                    Hello,

                    Has there been any resolution on this? I have a brand new Starling 2 Max, with 5G and have let the drone sit for over an hour and no GPS.

                    B 1 Reply Last reply Reply Quote 0
                    • B
                      Bernhard @Kory4Drone
                      last edited by

                      @Kory4Drone sadly there has been no update.
                      @Zachary-Lowell-0 is there anything ModalAI can do to support?

                      groupoG 1 Reply Last reply Reply Quote 0
                      • groupoG
                        groupo @Bernhard
                        last edited by

                        @Bernhard I also have had GPS related issues with my sentinel drone that happens to have a 5G modem. I have two drones and one does work so we havent chased the other one down much. I will be interested to hear what steps the team will have for you

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