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Taranis Q X7

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  • Chad SweetC Offline
    Chad SweetC Offline
    Chad Sweet
    ModalAI Team
    wrote on last edited by Chad Sweet
    #2

    Our documentation explains how to use FrSky telemetry with Flight Core https://docs.modalai.com/flight-core-radios/#frsky

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    • T Offline
      T Offline
      tomipi
      Contributor
      wrote on last edited by
      #3

      Thanks for this. Unfortunately, I managed to set TEL_FRSKY_CONFIG to TELEM2 in QGroundControl and cannot form a connection between the drone and QGC anymore. Is this due to setting that parameter? How this can be fixed?

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      • T Offline
        T Offline
        tomipi
        Contributor
        wrote on last edited by
        #4

        I managed to solve this by connecting QGC through USB.

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        • T Offline
          T Offline
          tomipi
          Contributor
          wrote on last edited by
          #5

          Our Seeker was ordered with the FrSky receiver and our transmitter is FrSky Taranis QX7 ACCST. The only telemetry we see at the moment is the receiver voltage. The telemetry works as expected over wifi between the drone and QGC.

          On the receiver GND, +5V and SBUS_OUT/CPPM are connected. We can confirm that the mode is SBUS (the blued led is solid on the receiver).

          How can we get the telemetry to our transmitter? Do we have to connect some extra cables, update the firmware or something else?

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          • modaltbM Offline
            modaltbM Offline
            modaltb
            ModalAI Team
            wrote on last edited by
            #6

            Hi @tomipi ,

            To confirm, this is what you have correct?

            Are you able to get the RC "input" into the system with this setup, and what you aren't getting is telemetry back? This setup below interfaces with an RC Input driver, so I don't think it will be passing telemetry back out... Will check with the guys on what they use here.

            1dcd4b35-189e-4002-ae07-b8b223f5ec01-image.png

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            • T Offline
              T Offline
              tomipi
              Contributor
              wrote on last edited by
              #7

              Hi,

              Yes I believe that is correct, everything is factory installed.

              Are you able to get the RC "input" into the system with this setup, and what you aren't getting is telemetry back?

              Yes, everything else except the telemetry from the drone to the transmitter is working.

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              • modaltbM Offline
                modaltbM Offline
                modaltb
                ModalAI Team
                wrote on last edited by
                #8

                Hi @tomipi ,

                OK I see. This 'RC input' connector, with SBUS "IN", is SBUS version 1.... e.g. it's an input only into the PX4 FW, meaning there's no bi-directional comms supporting telemetry with this configuration.

                I'll ask around to see if we have gotten telemetry data out of the system, but it would require the use of a UART port and some extra cable to route that traffic off PX4 into the FrSky module, not the same SBUS RX line likely.

                You are able to get telemetry over WiFi because we have a MAVLink instance running, connecting to VOXL, and shoveling data to/from over UDP.

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                • T Offline
                  T Offline
                  tomipi
                  Contributor
                  wrote on last edited by
                  #9

                  Hi @modaltb,

                  Actually, for the connector J12 only pin 3 (SBus RX) is connected to the SBUS_OUT of the receiver as shown in the picture below. There is no GND connection.

                  seeker_2.jpg

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                  • modaltbM Offline
                    modaltbM Offline
                    modaltb
                    ModalAI Team
                    wrote on last edited by
                    #10

                    07886147-7a05-452f-87c9-7efc24df05c8-image.png

                    The 5VDC and GND are pulled off of here.

                    That said, you see there's a single RX line from receiver into RC input, this is how we are getting the RC channels, but there's nothing coming out of the system as far as telemetry.

                    So basically with this setup, I don't expect telemetry coming out over RC, only control going into it.

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                    • T Offline
                      T Offline
                      tomipi
                      Contributor
                      wrote on last edited by
                      #11

                      We managed to solve this by connecting S.Port on R-XSR to J5 UART_4W_TX_3V3 and enabling FRSky (TELEM1) on QGC.

                      seeker_mod.jpg

                      taranis_telemetry.jpg

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                      • Chad SweetC Offline
                        Chad SweetC Offline
                        Chad Sweet
                        ModalAI Team
                        wrote on last edited by
                        #12

                        Outstanding! Thank you for following up

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