https://devzone.nordicsemi.com/f/nordic-q-a/26119/can-not-run-blink-exampleHello! I use the NRF51228 board like this PICTURE The ICs revision QFAAH0. I use Keil-uVision 5.17 and ST-Link V2 from STM32F4 Discovery board to load firmware HEX as described here HERE I use SDK v11 - example &quot;blink&quot; from folder &quot;examples\peripheralen-USTelligent Community 13Sat, 21 Oct 2017 11:14:00 GMThttps://devzone.nordicsemi.com/thread/102924?ContentTypeID=1Sat, 21 Oct 2017 11:14:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:37903ddc-fb46-4da7-a749-5c6af2197cfdAlex<p>Big thank you! I loaded SoftDevice s130 by J-Link(ST-Link can not do that) and now all work nice!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/102922?ContentTypeID=1Fri, 20 Oct 2017 13:19:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bfcd68d8-022f-4a71-afb3-5cb403e6b3a4Alex<p>Hi! I did not , only HEX, because I thougt that SoftDevice was loaded from factory. I will try it and will answer later, THX.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/102923?ContentTypeID=1Fri, 20 Oct 2017 12:39:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9915bd4a-af93-44ab-9d2c-393cf05684d1J&#248;rn<p>Have you loaded a SoftDevice (Nordics BLE stack) before you loaded the blinky example? The peripheral\blinky example is a BLE example which needs the SoftDevice to function. You can find the SoftDevice hex file in the \components\softdevice\s130\hex folder.</p><div style="clear:both;"></div>