ST-LINK Cannot Detect Target – NUCLEO-F072RB – “Unable to get core ID” / “No STM32 target found”

[Visu]

Hi,

I am facing an issue while connecting to my board using STM32CubeProgrammer and ST-LINK. I would appreciate any help.

Board: NUCLEO-F072RB
Programmer: ST-LINK (Onboard)
Software: STM32CubeProgrammer
Connection: SWD
ST-LINK Firmware: V2J46M31

Issue Description:
STM32CubeProgrammer is unable to detect the target MCU. It shows errors like:

• Unable to get core ID

• No STM32 target found

• ST-LINK error (DEV_CONNECT_ERR)

Observed Details:

• Target voltage showing around 0.29V

• Connection mode tried: Normal (SWD)

• Reset mode: Software reset

• Speed: Reliable

• Frequency: 4000 kHz

Log Messages (Important Parts):

• Error: Unable to get core ID

• Error: No STM32 target found!

• ST-LINK error (DEV_CONNECT_ERR)

• Error: Problem occurred while trying to connect

What I Already Checked:

• USB cable and port

• Reinstalled STM32CubeProgrammer

• ST-LINK firmware upgrade option checked

• Tried reconnecting multiple times

Questions:

1. Is the low target voltage (0.29V) the reason ST-LINK cannot detect the MCU?

2. Could this be a power supply or hardware issue on the board?

3. Should I try different reset modes (Hardware reset / Connect under reset)?

4. Any recommended debugging steps for this case?

Thanks in advance for your support.