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    VOXL 2 Ethernet and USB Hub Add-on with Doodle lab radio

    VOXL Accessories
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    • A
      AidanGallagher
      last edited by 10 Jun 2025, 15:20

      Hi,

      Can I connect a doodle lab radio to the J12 connector on the Ethernet and USB Hub board?

      I have connected it and ran voxl-configure-modem

      When I check ifconfig eth0 the IP details looks correct but I cannot ping any other IP address on the Doodle network.

      Regards
      Aidan

      T 1 Reply Last reply 10 Jun 2025, 16:49 Reply Quote 0
      • T
        tom admin @AidanGallagher
        last edited by 10 Jun 2025, 16:49

        @AidanGallagher Are you able to ping the doodle modem itself? Also double check you aren't trying to use an IP that is already being used on the doodle network

        A 1 Reply Last reply 11 Jun 2025, 11:31 Reply Quote 0
        • A
          AidanGallagher @tom
          last edited by 11 Jun 2025, 11:31

          @tom Cannot ping the modem and I am certain its a free IP address.

          I tried a USB Expansion Board with Fastboot v2 I had on another setup and it works so the issues does seem to be on related to this board.
          Is there a jumper I need to set to enable the J12 header?

          Regards
          Aidan

          T 1 Reply Last reply 11 Jun 2025, 16:33 Reply Quote 0
          • T
            tom admin @AidanGallagher
            last edited by 11 Jun 2025, 16:33

            @AidanGallagher Can you post a picture of the setup you're using?

            A 1 Reply Last reply 11 Jun 2025, 19:51 Reply Quote 0
            • A
              AidanGallagher @tom
              last edited by 11 Jun 2025, 19:51

              @tom ill do that tomorrow when I'm back in the office

              A 1 Reply Last reply 12 Jun 2025, 11:58 Reply Quote 0
              • A
                AidanGallagher @AidanGallagher
                last edited by 12 Jun 2025, 11:58

                image1.jpeg

                A 1 Reply Last reply 12 Jun 2025, 11:58 Reply Quote 0
                • A
                  AidanGallagher @AidanGallagher
                  last edited by 12 Jun 2025, 11:58

                  That's my working solution

                  A 1 Reply Last reply 12 Jun 2025, 12:00 Reply Quote 0
                  • A
                    AidanGallagher @AidanGallagher
                    last edited by 12 Jun 2025, 12:00

                    image0.jpeg

                    A 1 Reply Last reply 12 Jun 2025, 12:00 Reply Quote 0
                    • A
                      AidanGallagher @AidanGallagher
                      last edited by 12 Jun 2025, 12:00

                      This solution doesn't work

                      T 1 Reply Last reply 12 Jun 2025, 17:19 Reply Quote 0
                      • T
                        tom admin @AidanGallagher
                        last edited by 12 Jun 2025, 17:19

                        @AidanGallagher With an M0130 USB breakout board

                        M0130: https://www.modalai.com/products/m0130-3?variant=48186331693360

                        You can use this cable:
                        MCBL-00085: https://www.modalai.com/products/mcbl-00085?_pos=2&_sid=0c5d87c5e&_ss=r

                        and get rid of the need for the doodle breakout board

                        A 1 Reply Last reply 17 Jun 2025, 09:21 Reply Quote 0
                        • A
                          AidanGallagher @tom
                          last edited by 17 Jun 2025, 09:21

                          @tom that's cool we will take a look at that in the future.
                          Any idea why I cannot use the J12 port on the ethernet expansion board?

                          T V 2 Replies Last reply 17 Jun 2025, 16:54 Reply Quote 0
                          • T
                            tom admin @AidanGallagher
                            last edited by 17 Jun 2025, 16:54

                            @AidanGallagher I don't, if you tried connecting internet over ethernet or some other ethernet device does it work?

                            A 1 Reply Last reply 20 Jun 2025, 10:11 Reply Quote 0
                            • A
                              AidanGallagher @tom
                              last edited by 20 Jun 2025, 10:11

                              @tom I haven't tried the ethernet port yet. I have used the physical USB port with a WiFi dongle and that worked well.

                              1 Reply Last reply Reply Quote 0
                              • V
                                Vinny ModalAI Team @AidanGallagher
                                last edited by 20 Jun 2025, 15:13

                                Hi @AidanGallagher
                                That USB2 port Port, J12, on M0062 is not much different than many other expansion board USB ports. It goes through a HUB, and as Tom pointed out, if you use M0130, your setup will simplify.
                                M00130 is the only USB2 product we have that can power the Doodle directly: https://docs.modalai.com/expansion-design-guide/#usb-expansion-over-j3--j5
                                a205f92a-157c-434b-a197-e935fa7ed148-image.png
                                I'm not entirely sure either why your M0062 will not work, but I'm thinking it may be something with the grounding and VBUS connection due to the external board you use for power, and it not sharing a ground with the M0062 where the USB comes from. For example, our MCBL-00085-1 handles all that: https://docs.modalai.com/cable-datasheets/#mcbl-00085
                                Our USB3 debug board does not have a current limiting IC like M0062 has, and will not impact USB operations. However, with M0062, since it goes through the hub, and it has power control, if anything goes wrong with power or ground, the port may be disabled.
                                I would first try to see if your J12 port works normally, with a thumb drive for example (or I think you did that with a WiFi and were good). Then, if you want to try to share some more ground connections between your M0062 and the external power supply, that could be a good test.

                                But, we do suggest you change to an M0130 as you will have a much nicer setup long term.
                                Hope that helps.

                                1 Reply Last reply Reply Quote 0
                                • S
                                  shawn_ricardo
                                  last edited by shawn_ricardo 12 days ago 12 days ago

                                  Hi @AidanGallagher ,

                                  I'm using the same setup and had success with changes all instances of eth0 to eth1 under $MODEM == "doodle" under $PLATFORM == "qrb5165-rb5 in the script /usr/bin/voxl-modem-start

                                  It appears that when using the hub, the hub's build-in USB to ethernet chip always appears as eth0 (smsc75xx), even if nothing is plugged in

                                  The stock modem script at /usr/bin/voxl-modem-start hard-codes doodles static ip to eth0.

                                  under dmesg -w, when the dodole radio i plugged in (or just later on in the boot sequence), smsc95xx is assigned to eth1.

                                  as a result, the ip ends of being assigned to the wrong interface and the radio cannot pass traffic

                                  @Vinny , is there a better way to make these changes? something that won't get overwritten when a modal ai update occurs?

                                  V T 2 Replies Last reply 12 days ago Reply Quote 0
                                  • V
                                    Vinny ModalAI Team @shawn_ricardo
                                    last edited by 12 days ago

                                    Hi @shawn_ricardo
                                    That is more of a question for @tom

                                    1 Reply Last reply Reply Quote 0
                                    • T
                                      tom admin @shawn_ricardo
                                      last edited by 12 days ago

                                      @shawn_ricardo Not really a better way at this point, I'd like to at some point just make the network interface able to be specified in the config file as opposed to hard-coded as eth0, but haven't gotten to that yet

                                      A 1 Reply Last reply 4 days ago Reply Quote 1
                                      • A
                                        AidanGallagher @tom
                                        last edited by 4 days ago

                                        @tom @shawn_ricardo Thanks very much - ill give that a try

                                        1 Reply Last reply Reply Quote 0
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