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5G Modem not working

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  • LRL Offline
    LRL Offline
    LR
    Contributor
    wrote on last edited by
    #1

    Hello,

    I am using a Starling V2 Max with voxl-suite 1.4.2 and a Qualcomm 5G module (pictured below). I have inserted a Mint Mobile SIM card and followed the configuration steps from ModalAI's documentation.

    During setup, I selected:
    1️⃣ V2 as the modem (option 1)
    2️⃣ No Modallink (option 2)
    3️⃣ T-Mobile APN: fast.t-mobile.com (since Mint uses T-Mobile's network) (option 4)

    However, the system fails to detect /dev/ttyUSB2, and running:

    ls /dev | grep ttyUSB

    returns nothing—indicating that no /dev/ttyUSB devices are available.

    Any insights or troubleshooting suggestions would be appreciated.

    Attached is a picture of the 5G modem for reference.
    Screenshot from 2025-04-04 15-14-59.png

    Thank you in advance

    tomT 1 Reply Last reply
    0
    • LRL LR

      Hello,

      I am using a Starling V2 Max with voxl-suite 1.4.2 and a Qualcomm 5G module (pictured below). I have inserted a Mint Mobile SIM card and followed the configuration steps from ModalAI's documentation.

      During setup, I selected:
      1️⃣ V2 as the modem (option 1)
      2️⃣ No Modallink (option 2)
      3️⃣ T-Mobile APN: fast.t-mobile.com (since Mint uses T-Mobile's network) (option 4)

      However, the system fails to detect /dev/ttyUSB2, and running:

      ls /dev | grep ttyUSB

      returns nothing—indicating that no /dev/ttyUSB devices are available.

      Any insights or troubleshooting suggestions would be appreciated.

      Attached is a picture of the 5G modem for reference.
      Screenshot from 2025-04-04 15-14-59.png

      Thank you in advance

      tomT Offline
      tomT Offline
      tom
      admin
      wrote on last edited by
      #2

      @LR What do you see with lsusb -t and ifconfig

      LRL 1 Reply Last reply
      0
      • tomT tom

        @LR What do you see with lsusb -t and ifconfig

        LRL Offline
        LRL Offline
        LR
        Contributor
        wrote on last edited by
        #3

        @tom Here is the output for lsbusb -tScreenshot from 2025-04-04 17-24-34.png

        And here the one for ifconfig
        Screenshot from 2025-04-04 17-24-06.png

        it says that the voxl-modem service is up and running but it is not connected to the internet

        tomT 1 Reply Last reply
        0
        • LRL LR

          @tom Here is the output for lsbusb -tScreenshot from 2025-04-04 17-24-34.png

          And here the one for ifconfig
          Screenshot from 2025-04-04 17-24-06.png

          it says that the voxl-modem service is up and running but it is not connected to the internet

          tomT Offline
          tomT Offline
          tom
          admin
          wrote on last edited by
          #4

          @LR When running through voxl-configure-modem you'll want to select em9191 not v2

          LRL 1 Reply Last reply
          0
          • tomT tom

            @LR When running through voxl-configure-modem you'll want to select em9191 not v2

            LRL Offline
            LRL Offline
            LR
            Contributor
            wrote on last edited by LR
            #5

            @tom Thanks it worked! Out of curiosity, was it written somewhere and I missed that?

            tomT 1 Reply Last reply
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            • LRL LR

              @tom Thanks it worked! Out of curiosity, was it written somewhere and I missed that?

              tomT Offline
              tomT Offline
              tom
              admin
              wrote on last edited by
              #6

              @LR The 5G configuration on Starling 2 is a fairly new offering so there may not be fully representative docs live.

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