https://devzone.nordicsemi.com/f/nordic-q-a/18808/blinky-failWith nRF52832 DK I have managed to compile this blinky example: #include &lt;stdlib.h&gt; #include &lt;stdint.h&gt; #include &lt;stdbool.h&gt; #include &quot;nrf_delay.h&quot; #include &quot;nrf_gpio.h&quot; const uint32_t led_pin1 = 13; int main(void) { nrf_gpio_cfg_outputen-USTelligent Community 13Thu, 05 Jan 2017 13:47:59 GMThttps://devzone.nordicsemi.com/thread/72631?ContentTypeID=1Thu, 05 Jan 2017 13:47:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:349a80f9-3fc5-4402-b3e3-06260f0cb13belegan<p>İt worked, thanks a lot.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/72630?ContentTypeID=1Thu, 05 Jan 2017 13:45:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9c528879-8bed-4499-a49b-4c73563f6d3eJ&#248;rgen Holmefjord<p>Hi,</p> <p>Pin 13 is not connected to any LED on the nRF52 DK. Have you connected a LED to pin 13? <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52/dita/nrf52/development/dev_kit_v1.1.0/hw_btns_leds.html?cp=2_2_2_3_1_4">LED 1 of the DK is connected to pin P0.17</a>. You should try changing your code to <code>const uint32_t led_pin1 = 17;</code></p> <p>Best regards,</p> <p>Jørgen</p><div style="clear:both;"></div>