https://devzone.nordicsemi.com/f/nordic-q-a/13082/starting-with-nrf51-dk-and-eclipseHi I got my new NRF51 DK. I was able to test it with blinky using mbed. I had to add the add the device nRF51-DK. then compile it and drag the .hex file into the mbed drive. It worked, fine. I was able to blink the LED. But If I keep the device asen-USTelligent Community 13Mon, 11 Apr 2016 08:40:23 GMThttps://devzone.nordicsemi.com/thread/49890?ContentTypeID=1Mon, 11 Apr 2016 08:40:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b4684ae0-0744-4312-8bc3-b118286c0dcftoashwin<p>I had to convert it from mbed to jlink. I got it resolved now.</p> <p>I had to reset the device..</p> <ol> <li> <p>hold the reset button and power cycle. -&gt; now it does not show up as mbed device.</p> </li> <li> <p>then upload jlink.bin file.. (just dragging it into the drive. in the file-explorer) -&gt; dont remember where I got this bin file. But somebody can post the link.</p> </li> </ol> <p>Now its visible on nRFgo.</p><div style="clear:both;"></div>