A blog about electronics and programming
Home ElectronicsSTM32 How to restore ST-LINK interface after a bad update (2.26.15 firmware)

How to restore ST-LINK interface after a bad update (2.26.15 firmware)

by Carmine Noviello
10 comments 2.3K views 2 minutes read

Several people are reporting me issues with the latest 2.26.16 firmware update for the ST-LINK interface of their Nucleo. After flashing the ST-LINK 2.1 interface with this firmware release, the debugging interface no longer works. The symptoms  are that it's no longer possible to use the interface, nor flash it again. The STLinkUpgrade 3.0.7 shows this error:

Schermata 2016-02-26 alle 06.52.09 copy

Reading this post from an ST engineer, and thanks to the fact that I have saved an old ST-LINK firmware release (2.24.11), I successfully restored the ST-LINK interface.

Proceed in this way:

  1. Download this old ST-LINK firmware from here.
  2. Connect your development board to the USB interface.
  3. Do a quick shortcut between SB11 and RST pads (they are located on the bottom side of the board), as shown below:


  4. Start the STLinkUpgrade 3.0.3 (the one downloaded before) and downgrade the firmware.
  5. Disconnect your Nucleo board from USB and reconnect it again.


You may also like


woojay January 4, 2018 - 12:51 pm

Lifesaver. Thank you.

Isuru March 16, 2018 - 3:17 pm

thank you.......

Alpaslan Ersoz July 9, 2018 - 7:12 pm

I use Nucleo-F767ZI evalution board. I try to connect the board and laptop with USB cable, but I got 'No ST-Link Device detected problem' during ST-Link Firmware device connection process. RST AND SB111 pads have already connected with a resistor on the board. So, do you have any solution for this problem?
Thank you

khaled December 18, 2018 - 11:23 am

Thank you, done !

Pnk February 11, 2019 - 11:13 am

Thank you so much, on the most recent firmware I wasn't able to use my Nucleos ST-LINK to upload stuff, only through Mass Storage. Now ST-LINK works again.

Janek May 24, 2019 - 8:43 pm

Thanks a lot!

august December 28, 2020 - 1:34 pm

Hey guys, my name is Kyran!

Im an academic writer and Im going to change your lifes onсe and for all
Writing has been my passion since early years and now I cant imagine my life without it.
Most of my poems were sold throughout Canada, USA, Old England and even India. Also I
m working with services that help people to save their time.
People ask me "Sir, Kyran Mckinney, I need your professional help" and I always accept the request, `cause I know, that only I can solve all their problems!

Academic Writer - Kyran Mckinney - http://www.aa-mediastudies.net Band

casey February 1, 2021 - 12:43 am

THANK yer.

Amir March 2, 2021 - 3:32 pm

You saved my board and money! Thanks a lot!

JuanAngel January 23, 2024 - 10:03 pm

Wow, you saved my board!


Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.