ST-Link can't connect in VSCode using ST-Link GDB server; but OK in Keil

Austin_Jia · ‎2026-05-27

LaurentL · ‎2026-05-27

Hello,

In the debug console text, can you check that the STLINK Firmware is not outdated and needs to be upgraded.

Or check if you see any error message.

Rgds,

Laurent

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Andrew Neil · ‎2026-05-27

Welcome to the forum

Please see How to write your question to maximize your chances to find a solution for best results.

In particular:

What STM32 device are you using?
What board?
What ST-Link?

Note that both a clone STM32 and a clone ST-Link could cause this - see:

Blue pill (STM32F1) programs OK via Arduino IDE but not Keil. Chip ID:0x2BA01477

How to recognize a genuine ST-LINK/V2 versus a cloned one

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.