Can't read my STM32 Nucleo-WL55JC1 on the STM32Cube Programmer

[AFidi.1]

Before this I'm launching my modified version of LoRaWAN_End_Node firmware, but my Nucleo Board keeps restarting and heating up so I unplugged the USB cable. When I tried to connect my board back I get a FAILS.txt file with the following content

The interface firmware FAILED to reset/halt the target MCU

I tried to connect my MCU to the STM32Cube Programmer with under reset configuration and trying all reset mode configuration but got no luck.

Other things that I've tried:

1. Disconnect JP1
2. Connecting while pushing the reset button
3. Doing point 1 and 2 at the same time

And still got no luck.

Update:

Connecting the JP1 jumper back and the heating issue is back (the MCU isn't dead, I guess(?))

[Foued_KH]

Hello @AFidi.1​ ,

Please refer to :How can I connect to my STM32 evaluation board using STM32CubeProgrammer

Foued

[Mike_ST]

Hello,

>> When I tried to connect my board back I get a FAILS.txt file with the following content

1. The interface firmware FAILED to reset/halt the target MCU

That means the on-board ST-Link can't communicate with the STM32WL55 for whatever reason.

>> but my Nucleo Board keeps restarting and heating up

What part exactly is heating up ?

You may have a short-circuit somewhere.

[AFidi.1]

It is around the block that contains both the MCU and LoRa chip. Only thing that I connect to the board is only a Teseo-LIV3FL module and I'm pretty sure it is not the one that caused any short-circuit since I've been using them for long time and got no problem. The heating issue is came after I tried to use the LoRa interface.

Tried on a spare board and the heating issue is gone (even with the LoRa interface turned on). I suspect the LoRa chip was defective since the heating issue only happening if the LoRa interface is turned on.