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KALEESWARAN_R
Associate
June 29, 2026
Question

UART TRANSMISSION ISSUE

  • June 29, 2026
  • 4 replies
  • 67 views

Hi community, I have been facing some instability in transmission of the UART in STM32 LQ5CGU6P, When we measure the TX and RX line when it fails to transfer the data, both TX and RX are low, is this ever experienced before? help us out to troubleshoot this, has anyone come across this kind of scenario with UART before?

4 replies

Andrew Neil
Andrew Neil
Super User
June 29, 2026

Please give more details - see:

 

A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.
mƎALLEm
mƎALLEm
ST Technical Moderator
June 29, 2026

Hello,

STM32LQ5CGU6P

There is no STM32 with this part number please check the device you are using and provide the correct one.

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    Ozone
    Ozone
    Principal
    June 29, 2026

    > When we measure the TX and RX line when it fails …

    How does that “fail” look like in this situation, and what makes you think it fails in the first place ?

    As mentioned, you need to be be more descriptive what you want to achieve, what hardware you use, and what you observe.

      Gyessine
      ST Technical Moderator
      June 29, 2026

      Hello ​@KALEESWARAN_R 

      Can you please share a minimal part of your project that replicates the issue?
      BR
      Gyessine

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