# Tap UART TX (RC) pin signal elsewhere

Source: https://forum.modalai.com/topic/4711/tap-uart-tx-rc-pin-signal-elsewhere
Category: VOXL 2 and VOXL 2 Mini (https://forum.modalai.com/category/26/voxl-2-and-voxl-2-mini)
Tags: voxl-2-mini
Posted: 2025-08-28 11:27:10 UTC by TomP
Replies: 2 · Views: 542

## TomP · 2025-08-28 11:27:10 UTC

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](https://forum.modalai.com/assets/uploads/files/1756380314571-whatsapp-image-2025-08-28-at-13.18.38.jpeg)

## Reply by Vinny (ModalAI staff) · 2025-08-29 17:33:43 UTC

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!

## Reply by Vinny (ModalAI staff) · 2025-08-29 17:46:56 UTC

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.