https://devzone.nordicsemi.com/f/nordic-q-a/22512/i-can-t-use-nrf5-sdk-13-0-0-for-nrf52840-dk-boardAs the tittle. I load example in SDK 13 to nrf52840 DK but It does not generate bluetooth.en-USTelligent Community 13Sat, 03 Jun 2017 19:53:34 GMThttps://devzone.nordicsemi.com/thread/88576?ContentTypeID=1Sat, 03 Jun 2017 19:53:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e1a06187-77be-4c20-b0c7-a890769bc49fendnode<p>Looks like you don&#39;t have Soft Device flashed. Can you check in nRFgo Studio what do you have in the flash of nRF52 chip?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/88575?ContentTypeID=1Sat, 03 Jun 2017 01:12:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:075af197-1097-43cd-a738-9733bbb74c2bG&#243;t G?y<p>I test with BLE_Blink_led example. I rebuild example (press F7) then flash to MCU ( press F8). I use my mobile ( have nRF tool box) to see bluetooth but don&#39;t have any bluetooth.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/88574?ContentTypeID=1Fri, 02 Jun 2017 07:26:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:44a266b2-a682-4658-8139-727f1f5ecd82Sigurd<p>What example did you test? Did you remember to flash the S140 SoftDevice?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/88573?ContentTypeID=1Fri, 02 Jun 2017 07:25:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3665336b-1cdc-4c8b-b688-8e2c5fade8a5endnode<p>So poor description. Could you be more specific which part from nRF5 SDK you use with nRF52840 Preview DK, how, what do you expect to happen and what do you observe instead?</p><div style="clear:both;"></div>