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  3. Unable to connect multiple VOXL2 mini drones to QGroundControl using different UDP ports

Unable to connect multiple VOXL2 mini drones to QGroundControl using different UDP ports

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  • S Offline
    S Offline
    Sarika Sharma
    Contributor
    wrote on last edited by
    #1

    I am trying to connect multiple VOXL2 Mini drones to QGroundControl (QGC) by assigning different UDP ports per drone, but I am unable to connect on any port other than the default 14550.

    My Setup

    Hardware: VOXL2 Mini
    GCS: QGroundControl
    QGC running on host PC

    Goal

    Drone 1

    IP: 192.168.1.16

    UDP Port: 14551

    Drone 2

    IP: 192.168.1.15

    UDP Port: 14552

    QGC successfully connects when using UDP port 14550 but not with 14551/14552

    kindly look at the attached screenshots:
    ![alt text](b9084041-d1be-43d0-877f-e9092d9e8688-Screenshot from 2025-12-23 16-10-25.png )file:///home/idr/Pictures/Screenshots/Screenshot%20from%202025-12-23%2016-10-25.png

    ![alt text](045f5848-1a55-4c12-bbfa-e1ac5a2d8b90-Screenshot from 2025-12-23 16-26-45.png image url)file:///home/idr/Pictures/Screenshots/Screenshot%20from%202025-12-23%2016-26-45.png

    Eric KatzfeyE 1 Reply Last reply
    0
    • S Sarika Sharma

      I am trying to connect multiple VOXL2 Mini drones to QGroundControl (QGC) by assigning different UDP ports per drone, but I am unable to connect on any port other than the default 14550.

      My Setup

      Hardware: VOXL2 Mini
      GCS: QGroundControl
      QGC running on host PC

      Goal

      Drone 1

      IP: 192.168.1.16

      UDP Port: 14551

      Drone 2

      IP: 192.168.1.15

      UDP Port: 14552

      QGC successfully connects when using UDP port 14550 but not with 14551/14552

      kindly look at the attached screenshots:
      ![alt text](b9084041-d1be-43d0-877f-e9092d9e8688-Screenshot from 2025-12-23 16-10-25.png )file:///home/idr/Pictures/Screenshots/Screenshot%20from%202025-12-23%2016-10-25.png

      ![alt text](045f5848-1a55-4c12-bbfa-e1ac5a2d8b90-Screenshot from 2025-12-23 16-26-45.png image url)file:///home/idr/Pictures/Screenshots/Screenshot%20from%202025-12-23%2016-26-45.png

      Eric KatzfeyE Offline
      Eric KatzfeyE Offline
      Eric Katzfey
      ModalAI Team
      wrote on last edited by
      #2

      @Sarika-Sharma How are you setting up your network? Are you using WiFi? Station mode or AP mode? If you are using WiFi and station mode then you want to set the primary_static_gcs_ip of each drone to the IP address of the computer that is running QGC. Since each drone will have a different IP address you don't need to specify different UDP ports.

      S 1 Reply Last reply
      0
      • Eric KatzfeyE Eric Katzfey

        @Sarika-Sharma How are you setting up your network? Are you using WiFi? Station mode or AP mode? If you are using WiFi and station mode then you want to set the primary_static_gcs_ip of each drone to the IP address of the computer that is running QGC. Since each drone will have a different IP address you don't need to specify different UDP ports.

        S Offline
        S Offline
        Sarika Sharma
        Contributor
        wrote on last edited by
        #3

        @Eric-Katzfey yes, I am using wifi and station mode.And I am able to connect multiple drones having different IP Address on the default 14550 UDP port .But I wanna ask can I specify different ports for each drone having different IP address???
        For ex:
        Drone 1 : IP->192.168.1.15 On port no 14551
        Drone 2: IP-> 192.168.1.16 On port no 14552

        Eric KatzfeyE 1 Reply Last reply
        0
        • S Sarika Sharma

          @Eric-Katzfey yes, I am using wifi and station mode.And I am able to connect multiple drones having different IP Address on the default 14550 UDP port .But I wanna ask can I specify different ports for each drone having different IP address???
          For ex:
          Drone 1 : IP->192.168.1.15 On port no 14551
          Drone 2: IP-> 192.168.1.16 On port no 14552

          Eric KatzfeyE Offline
          Eric KatzfeyE Offline
          Eric Katzfey
          ModalAI Team
          wrote on last edited by
          #4

          @Sarika-Sharma You can specify a different port to connect to at the GCS for each drone but their own port is hard-coded to 14550. https://gitlab.com/voxl-public/voxl-sdk/services/voxl-mavlink-server/-/blob/dev/src/gcs_io.c?ref_type=heads#L979

          S 1 Reply Last reply
          0
          • Eric KatzfeyE Eric Katzfey

            @Sarika-Sharma You can specify a different port to connect to at the GCS for each drone but their own port is hard-coded to 14550. https://gitlab.com/voxl-public/voxl-sdk/services/voxl-mavlink-server/-/blob/dev/src/gcs_io.c?ref_type=heads#L979

            S Offline
            S Offline
            Sarika Sharma
            Contributor
            wrote on last edited by
            #5

            @Eric-Katzfey If you would be so kind as to tell how can i specify a different port to connect to at the GCS for each drone?

            Eric KatzfeyE 1 Reply Last reply
            0
            • S Sarika Sharma

              @Eric-Katzfey If you would be so kind as to tell how can i specify a different port to connect to at the GCS for each drone?

              Eric KatzfeyE Offline
              Eric KatzfeyE Offline
              Eric Katzfey
              ModalAI Team
              wrote on last edited by
              #6

              @Sarika-Sharma It's in the configuration file but you'll need a more recent version of voxl-mavlink-server. I would recommend updating to SDK 1.6.2 and then grabbing voxl-mavlink-server 1.4.13 from here: http://voxl-packages.modalai.com/dists/qrb5165/sdk-1.6/binary-arm64/voxl-mavlink-server_1.4.13_arm64.deb.

              S 1 Reply Last reply
              0
              • Eric KatzfeyE Eric Katzfey

                @Sarika-Sharma It's in the configuration file but you'll need a more recent version of voxl-mavlink-server. I would recommend updating to SDK 1.6.2 and then grabbing voxl-mavlink-server 1.4.13 from here: http://voxl-packages.modalai.com/dists/qrb5165/sdk-1.6/binary-arm64/voxl-mavlink-server_1.4.13_arm64.deb.

                S Offline
                S Offline
                Sarika Sharma
                Contributor
                wrote on last edited by
                #7

                @Eric-Katzfey Thank you.

                S 1 Reply Last reply
                0
                • S Sarika Sharma

                  @Eric-Katzfey Thank you.

                  S Offline
                  S Offline
                  Sarika Sharma
                  Contributor
                  wrote on last edited by
                  #8

                  @Sarika-Sharma Kindly resolve this issue also https://forum.modalai.com/topic/4952/pmd-tof-not-detected-on-voxl2?_=1766730439331.

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