Skip to main content
miguekun
Visitor II
March 26, 2026
Solved

STM32WB55 custom UID

Hi,

UID is set at factory for all products?

 

Wholesale ICs comes already programmed? I need to repair some machines and IC needs to have same UID as replaced.

 

Thanks

TDK
TDKBest answer
March 26, 2026

The UID can't be set or changed. (That would make it non-unique.)

"If you feel a post has answered your question, please click ""Accept as Solution""."
View in thread

2 replies

TDK
TDKBest answer
March 26, 2026

The UID can't be set or changed. (That would make it non-unique.)

"If you feel a post has answered your question, please click ""Accept as Solution""."
    Andrew Neil
    Andrew Neil
    Super User
    March 26, 2026

    Yes, There is a UID built-in to the STM32:

    https://community.st.com/t5/stm32-mcus/how-to-obtain-and-use-the-stm32-96-bit-uid/ta-p/621443

    If you don't want to use that UID, you will have to adapt your code to take its UID from another source.

    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.
      Terms & ConditionsAccessibility statement