https://devzone.nordicsemi.com/f/nordic-q-a/8606/pca10001-sdkI am using PCA10001 board. First of all i am unable to find nRF51 SDK.exe. So i downloaded SDK form below link link text I changed device to nRF51822_xxAA. Now i opened blinky project in keil ARM 5 \nRF51_SDK_8.1.0_b6ed55f\examples\peripheralen-USTelligent Community 13Mon, 10 Aug 2015 10:45:57 GMThttps://devzone.nordicsemi.com/thread/31500?ContentTypeID=1Mon, 10 Aug 2015 10:45:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:78d9b00e-6513-4fe4-9854-6a1075d98a74Petter Myhre<p>Sounds like you have redefined the pins, by including PCA10001.h. PCA10001 is an old development kit, and the latest SDK for it is SDK 6.1.0, with it you can easily evaluate the board. It hasn&#39;t been tested with SDK 9.0.0. I don&#39;t know what the problem is, because you haven&#39;t showed me what you are actually doing. Are you using the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk51.v9.0.0/lib_bsp.html?cp=4_1_0_3_4">Board Support Package</a> used by ble_app_hrs in SDK 9.0.0?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/31499?ContentTypeID=1Mon, 10 Aug 2015 04:58:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:220c4a7e-7b6c-4dcc-8f9e-8cd0edf55b92Ritesh Panchal<p>Thanks for the Reply. But i can successfully run blinkly without redefining the pins. I just change the preprocessor symbols define to BOARD_PCA10001. In which file i need to redefine the pins?</p> <p>Can you provide example code or SDK for PCA10001?? So i can easily evaluate the the board.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/31498?ContentTypeID=1Fri, 07 Aug 2015 22:09:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ffca20bd-535c-4909-8835-de8e7dd4f05cPetter Myhre<p>Have you redefined the pins of the buttons and LEDs so that they match the pins that are connected to buttons and LEDs on the PCA10001?</p><div style="clear:both;"></div>