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    Malfunction the J connector on VOXL 2 investigation

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    • W
      will.huang.oksi
      last edited by

      To whom it may concern,

      Is there a command or diagnostic procedure to verify the operational status of the J port on a VOXL2?

      Details:
      We have integrated a board that includes a radio device with the VOXL2 via the J port. Initially, the VOXL2 detected the connection and the interface appeared as eth0. However, this VOXL2 has since stopped recognizing the connection. When the same board and radio device are tested with a different VOXL2, the connection is detected normally, which suggests the problem is isolated to this particular unit.

      Could you advise on tools, commands, or logs that can be used to determine whether the J port hardware or the associated network interface on this VOXL2 is functioning correctly?

      Please let me know if you need more details or questions
      Thank you.

      tomT 1 Reply Last reply Reply Quote 0
      • tomT
        tom admin @will.huang.oksi
        last edited by

        @will-huang-oksi Can you be more clear on which connector you're referring to? https://docs.modalai.com/voxl2-connectors/

        W 1 Reply Last reply Reply Quote 0
        • W
          will.huang.oksi @tom
          last edited by

          @tom

          we use this board
          https://www.modalai.com/products/m0151?variant=47083939791152
          with the Doodle lab nano radio
          https://doodlelabs.com/product/nano-mesh-rider-radio/

          Thank you for the quick response and please let me know if any further quesitons.

          tomT 1 Reply Last reply Reply Quote 0
          • tomT
            tom admin @will.huang.oksi
            last edited by

            @will-huang-oksi Take a look here at MCBL-0085: https://docs.modalai.com/cable-datasheets/#mcbl-00085
            The add-on board you're using it not capable of providing enough power for the doodle modem and this may be the cause of your issues.

            7cdcf70c-3aca-4490-a141-703b314b1904-image.png

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

              @tom 3a996e79-e11a-407c-aced-3e9cea2a3807-image.png

              W 1 Reply Last reply Reply Quote 0
              • W
                will.huang.oksi @tom
                last edited by

                @tom
                Thank you for the quick response.
                However,
                it doesn't explain why the same board with the same doodle lab nano radio works with the VOXL 2 previously ( just suddenly doesn't work anymore ) and work with other VOXL 2.

                And
                we are using
                https://techlibrary.doodlelabs.com/doodle-labs-nano-oem-mesh-rider-radio-24002482-mhz

                It doesn't require that much power
                8b15be7c-1e6c-4c43-ab08-6131d478a5ac-image.png

                please let me know if any misunderstanding, any suggestion, or any command/method we can use to verify the J port
                Thank you.

                VinnyV 1 Reply Last reply Reply Quote 0
                • VinnyV
                  Vinny ModalAI Team @will.huang.oksi
                  last edited by

                  Hi @will-huang-oksi
                  That board was not designed for 8W support.
                  Please use the suggested products for Doodle Labs products. As you see, it creates uncertainty and questions we cannot easily answer without a full investigation and analysis in our labs.
                  Thanks!
                  Vinny

                  W 1 Reply Last reply Reply Quote 0
                  • W
                    will.huang.oksi @Vinny
                    last edited by

                    Hello @Vinny
                    thank you for the response.

                    I understand and appreciate your point about the incorrect power configuration,
                    and we will definitely work on addressing that.

                    However,
                    the same board with the same Doodle Nano works properly on other VOXL2 units.
                    This suggests that even with the incorrect power, the Doodle Nano remains functional and can still communicate with other Doodle Nano devices.

                    For this reason, we’d like to investigate whether the J port itself is still functioning.
                    Could you suggest any methods we can use in our lab to verify if the J port on this particular VOXL2 is operational?
                    Or besides the power configuration part, any other spec you would recommend we investigate?

                    VinnyV 1 Reply Last reply Reply Quote 0
                    • VinnyV
                      Vinny ModalAI Team @will.huang.oksi
                      last edited by

                      Hi @will-huang-oksi

                      Sorry there is not much else I can offer. I'd need to have the HW in my hands to diagnose.

                      I'd start with the basics, Power. It is possible you blew the VBUS protection circuit that feeds J3 VBUS. It is also possible that GPIO_157 which enables VBUS on J3 is not correctly set in SW.
                      However, I still ask you discontinue use of M0151 for Doodle as you will have problems in the future and we cannot continue to support that.

                      Please follow the guidance listed in our cable page for Doodle. Those boards listed do not use the "VBUS" from J3 (rather we power switch the 5V DC Local with proper Hub monitoring), so you can likely recover proper functionality and continue with your efforts.
                      Thanks!

                      1 Reply Last reply Reply Quote 0
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