B-WL5M-SUBG1 - "Launching LoRaWAN_End_Node has encountered a problem"

Prabakaran · ‎2025-05-30

Split from https://community.st.com/t5/stm32-mcus-wireless/development-board-for-stm32wl5moc/td-p/795521 as this is a new question.

Hi @STTwo-32 ,

I have ordered and received two B-WL5M-SUBG1 boards for my testing. I am able to flash one B-WL5M-SUBG1 board. When I am trying to flash the another B-WL5M-SUBG1 board, I am getting this below error. Seems like HW issue or something else? Could you please help me to rectify this issue?

Looking for your valuable response :) .

Thanks,

Praba

Andrew Neil · ‎2025-05-30

The message tells you that it failed to initialise the ST-Link.

What ST-Link are you using?

The message also tells you to check power and cabling - have you done that?

More tips on resolving debugger connection problems:

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.