Downgrade ST-Link V2.1

Flavio_Ramires · ‎2025-09-10

Hello,

I have a NUCLEO-L476RG and after update the firmware of the ST-Link V2.1 embedded on the board, stops to communicate. I want to know if it's possible to downgrade this firmware. If yes, how can i do the downgrade?

Thanks!!!

Flavio_Ramires · ‎2025-09-10

Hello!

Was a bad upgrade, but today ST releases a new version of the firmware and the board starts to communicate.

Thanks!

View solution in original post

Andrew Neil · ‎2025-09-10

Welcome to the forum.

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

@Flavio_Ramires wrote:
Hello,
the ST-Link V2.1 embedded on the board, stops to communicate.

What, exactly, do you mean by that? Is it no longer recognised by your Host? Or just fails to communicate with the target?

How to solve connection errors when connecting and programming the STM32 target board.

How to solve debugger connection issues

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.

Flavio_Ramires · ‎2025-09-10

Hello!

Was a bad upgrade, but today ST releases a new version of the firmware and the board starts to communicate.

Thanks!