When using jlink to connect to my board in VSCode, it displays "unknown device"
nrfutil device recover
I tried a few of my boards, but the result was always the same: "unknown device"，I have verified these boards before and found no issues
I have also used another jlink tool, but the result is still the same
Using the DK development board can achieve successful connection.
I have also tried boards with nrf54l15 and nrf5340 chips, but neither of them could connect
What are your boards, the custom boards or DKs? If it's the custom board, do you connect a debugger with them?
Those are my custom boards ,Connect to VSCode via the jlink debugger。A few months ago, I was able to connect to VSCode using this jlink debugger without any issues, using the same custom board and the same jlink debugger。
You can use J-Link Commander to ensure VTref is present (~3.0–3.3V),
VTref is 3,3V.
The error prompt indicates that the reset pin needs to be connected and pulled low。
The chip on my custom board does not have the reset pin exposed。
In my previous experience, I have never connected the reset pin when using the jlink debugger, but it still successfully connected and worked
How to check if this SWD connection is disabled？
