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  3. Tap UART TX (RC) pin signal elsewhere

Tap UART TX (RC) pin signal elsewhere

Scheduled Pinned Locked Moved Unsolved VOXL 2 and VOXL 2 Mini
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  • T Offline
    T Offline
    TomP
    Contributor
    wrote on last edited by
    #1

    Hello everyone,
    I had a crash with my VOXL2 Mini, which caused the J19 connector to come loose. A solder joint was also torn off, so the connector cannot simply be soldered back on. Apart from that, the VOXL2 Mini still works perfectly.

    The loose connection is this pin:
    RC_UART_TX (Output) slpi_proc, SSC_QUP7, GPIO_178, 3.3V signal levels

    I really need it because it controls the gimbal. Can I solder a strand of wire to any other point on the board to tap the signal?

    Best regards,
    Tom

    WhatsApp Image 2025-08-28 at 13.18.38.jpeg

    VinnyV 2 Replies Last reply
    0
    • T TomP

      Hello everyone,
      I had a crash with my VOXL2 Mini, which caused the J19 connector to come loose. A solder joint was also torn off, so the connector cannot simply be soldered back on. Apart from that, the VOXL2 Mini still works perfectly.

      The loose connection is this pin:
      RC_UART_TX (Output) slpi_proc, SSC_QUP7, GPIO_178, 3.3V signal levels

      I really need it because it controls the gimbal. Can I solder a strand of wire to any other point on the board to tap the signal?

      Best regards,
      Tom

      WhatsApp Image 2025-08-28 at 13.18.38.jpeg

      VinnyV Offline
      VinnyV Offline
      Vinny
      ModalAI Team
      wrote on last edited by
      #2

      Hi @TomP
      I'll look right now, but can you please also send me a zoom in clearer picture of that area?
      I think I see other damaged parts, so I want to double check and advise what else could be impacted.

      Thanks!

      1 Reply Last reply
      0
      • T TomP

        Hello everyone,
        I had a crash with my VOXL2 Mini, which caused the J19 connector to come loose. A solder joint was also torn off, so the connector cannot simply be soldered back on. Apart from that, the VOXL2 Mini still works perfectly.

        The loose connection is this pin:
        RC_UART_TX (Output) slpi_proc, SSC_QUP7, GPIO_178, 3.3V signal levels

        I really need it because it controls the gimbal. Can I solder a strand of wire to any other point on the board to tap the signal?

        Best regards,
        Tom

        WhatsApp Image 2025-08-28 at 13.18.38.jpeg

        VinnyV Offline
        VinnyV Offline
        Vinny
        ModalAI Team
        wrote on last edited by
        #3

        Hi @TomP
        Looking pretty grim...
        That specific signal is all buried at least 3-7 layers deep directly from that pad and it hits other BGA devices right in the pad.... no exposed traces, no exposed pins at all...
        You'll have to find a different UART port or some other plan B.... sorry.

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