https://devzone.nordicsemi.com/f/nordic-q-a/41153/is-it-possible-to-program-nrf51dk-without-the-usb-cableHello everyone, My usb connector is dead on my nrf51 dk, do you know if it is possible to program it without using the usb connector, maybe by using a USB serial port adapter? (I don&#39;t know how it would work so if you have any idea). Thanks for youren-USTelligent Community 13Mon, 03 Dec 2018 12:43:48 GMThttps://devzone.nordicsemi.com/thread/159954?ContentTypeID=1Mon, 03 Dec 2018 12:43:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:391b2600-cfdc-4522-9db7-79fa45bbd75btesc<p>Hi,</p> <p>You do need a functioning USB connection in order to use the on-board programmer MCU for programming the nRF.</p> <p>If you have a second DK then you can use that one for programming instead, by using the &quot;Debug out&quot; port on the working DK and connect to the &quot;Debug in&quot; port on the one without functioning USB.</p> <p>Also if you have a J-Link programmer you should be able to connect that one.</p> <p>I refer to the <a href="https://www.nordicsemi.com/-/media/DocLib/Other/User_Guides/nRF51DevelopmentKitUserGuidev12.pdf">nRF51 DK user guide</a> for details on the various options.</p> <p>Regads,<br />Terje</p><div style="clear:both;"></div>