https://devzone.nordicsemi.com/f/nordic-q-a/103877/programmer-unable-to-detect-jlink-of-nrf5340dkHello Everyone, I am trying to program NRF52833 SOC on a custom board. I am using NRF5340DK to program it using the P20 port. When I connect VDD nRF pin to VTG pin, the system detects it as JLINK device but the nrf Programmer shows &quot; Unsupported deviceen-USTelligent Community 13Tue, 19 Sep 2023 09:04:05 GMThttps://devzone.nordicsemi.com/thread/446605?ContentTypeID=1Tue, 19 Sep 2023 09:04:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:29026671-3c2f-4afa-9364-d49b078d968cJared<p>Hi,</p> <p>Could you answer these questions?:</p> <ol> <li>Is the custom board supplied externally?</li> <li>What voltage is the board supplied with?</li> <li>Can you share a sketch of how the debugger is connected to the custom board?</li> <li>What voltage do you measure on the Reset pin?</li> </ol> <p>regards</p> <p>Jared&nbsp;</p><div style="clear:both;"></div>