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    px4 disconnected from uart

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    • Syed OmairS
      Syed Omair
      last edited by

      I have the m500 drone. I get error PX4 DISCONNECTED FROM UART. can someone help ???

      Syed OmairS 1 Reply Last reply Reply Quote 0
      • Syed OmairS
        Syed Omair @Syed Omair
        last edited by

        @Syed-Omair I tried the voxl-uart-loopback tests and I fail all 4 of them. can someone please help!!!!

        Screenshot 2023-09-06 at 6.14.40 PM.png

        tomT 1 Reply Last reply Reply Quote 0
        • tomT
          tom admin @Syed Omair
          last edited by

          @Syed-Omair The uart loopback tests are unrelated to this failure.

          Does your M500 have have the dual board or single board solution?

          i.e. voxl1 + flight core or voxl-flight all-in-one board

          Syed OmairS 1 Reply Last reply Reply Quote 0
          • Syed OmairS
            Syed Omair @tom
            last edited by

            @tom said in px4 disconnected from uart:

            Reply Quote 0

            I believe its all in one board. i have pictures.

            drone1.jpeg
            drone2.jpeg

            and thanks for the quick reply !!!

            tomT 1 Reply Last reply Reply Quote 0
            • tomT
              tom admin @Syed Omair
              last edited by

              @Syed-Omair It looks like you have a Flight Core v2 + VOXL dual board solution.

              FCv2 connects from this port: https://docs.modalai.com/flight-core-v2-datasheets-connectors/#j1---telem1--uart7--voxl-mavlink-default-port

              Can you confirm through QGC that TELEM1 is set up with the proper baudrate (921,600)

              Also ensure in /etc/modalai/voxl-mavlink-server.conf that external_fc is enabled

              Syed OmairS 1 Reply Last reply Reply Quote 0
              • Syed OmairS
                Syed Omair @tom
                last edited by

                @tom apologies I saw this so late.

                I cannot connect to qgroundcontrol since the error started showing. it used to automatically connect but it doesn't anymore. I have the correct ip address and everything. I try to initiate a connection from qgroundcontrol but this is what i get.

                Screenshot 2023-09-07 at 8.32.50 PM.png

                also external_fc was disabled (false) so i made it true.

                tomT 1 Reply Last reply Reply Quote 0
                • tomT
                  tom admin @Syed Omair
                  last edited by

                  @Syed-Omair You should also be able to connect to QGC over USB using J3: https://docs.modalai.com/flight-core-v2-datasheets-connectors/#j3---usb-connector

                  Syed OmairS 2 Replies Last reply Reply Quote 0
                  • Syed OmairS
                    Syed Omair @tom
                    last edited by

                    @tom I’ll be in touch once I get the cable and test it out

                    1 Reply Last reply Reply Quote 0
                    • Syed OmairS
                      Syed Omair @tom
                      last edited by

                      @tom hey tom. Thanks it worked. I just had to resrt TELEM1 to default settings through qgroundcontrol and then run voxl-configure-mavlink-server and reset the mavlink server to default settings and after that it connected wirelessly automatically.

                      But on a side note, can you also help me in pairing a taranis x7 transmitter to the m500 drone. I ordered the drone with the frsky transmitter but is it supposed to be on the drone somewhere or does it come separate like shown in the documentation??

                      like so https://www.youtube.com/watch?v=1IYg5mQdLVI

                      I am unable to find it on the drone anywhere. thank you.

                      Adrian HidalgoA Dobry KolaczD 2 Replies Last reply Reply Quote 0
                      • Adrian HidalgoA
                        Adrian Hidalgo ModalAI Team @Syed Omair
                        last edited by

                        @Syed-Omair the receiver should be on the bottom of the drone and you might have the R-XSR receiver instead of the X8R. It's smaller in profile, should look like something below. Bind button on the right corner next to the connector. Follow same binding procedures as the video.
                        a0b34398-8431-42b9-b234-85f5acf3227e-image.png

                        Syed OmairS 1 Reply Last reply Reply Quote 1
                        • Dobry KolaczD
                          Dobry Kolacz ModalAI Team @Syed Omair
                          last edited by

                          @Syed-Omair Follow the Red/Black/Yellow cables coming out of the flight core to the receiver

                          Syed OmairS 1 Reply Last reply Reply Quote 1
                          • Syed OmairS
                            Syed Omair @Adrian Hidalgo
                            last edited by

                            @Adrian-Hidalgo thank you so much. I am sorry I saw this so late

                            1 Reply Last reply Reply Quote 0
                            • Syed OmairS
                              Syed Omair @Dobry Kolacz
                              last edited by

                              @Dobry-Kolacz thanksss!!!

                              1 Reply Last reply Reply Quote 0
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