https://devzone.nordicsemi.com/f/nordic-q-a/32594/external-programming-with-nrf5-dk-p20Hello everyone, i know that there are many similiar questions on the DevZone but i am not able to get it work and i dont uderstand it yet. I want to flash a custom board. I connect the nRF5-DK to the custom board as the following: Custom Boarden-USTelligent Community 13Fri, 30 Mar 2018 08:00:54 GMThttps://devzone.nordicsemi.com/thread/126439?ContentTypeID=1Fri, 30 Mar 2018 08:00:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e6af400c-66e1-46fd-9908-75ad8f329217joe<ul> <li>P20 Pin 3 VDD to VDD of custom board ,not pin 2</li> </ul><div style="clear:both;"></div>