https://devzone.nordicsemi.com/f/nordic-q-a/4901/blinking-leds---setting-board-in-keilI&#39;m struggling to get started using Keil with an NRF51822 mounted on a custom board that I have cobbled together. I have opened the blinky/pca10031 example as a starting point because I would like to similarly test the indicator LEDs on my board, buten-USTelligent Community 13Mon, 22 Dec 2014 08:28:45 GMThttps://devzone.nordicsemi.com/thread/17310?ContentTypeID=1Mon, 22 Dec 2014 08:28:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:512e6ce0-c3d3-4315-a0d2-62e9859aa5adInspectron<p>At first you have to build your project. If the project is build with success, right click on LED and select: Go to Definition of &quot;name of your LED&quot;. Then you will get the pca10031.h file. In this file you can simply change the pins of the LEDs.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/17309?ContentTypeID=1Mon, 22 Dec 2014 01:26:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:81655e49-741e-4d70-bbac-23190675a0bdGavin<p>BOARD_PCA10031 is defined as a Preprocessor Symbol and can be edited by going to the C/C++ tab of the &#39;Options for Target&#39; dialog.(Right click on the Target in the Project window.)</p><div style="clear:both;"></div>