https://devzone.nordicsemi.com/f/nordic-q-a/39408/nrf81522-programmeHi, Development Environment : Windows 7 and keil MDK- ARM 5 and nRF81522 EVK I want to know that which SDK version should I use and I am using Arm debugger programmer(Waveshare) to programmed nrf51822. Thanks, Hardiken-USTelligent Community 13Fri, 12 Oct 2018 12:14:26 GMThttps://devzone.nordicsemi.com/thread/152685?ContentTypeID=1Fri, 12 Oct 2018 12:14:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:94680e35-5d4d-47e2-8a20-c5e3a1a5d252hardikvala<p>Thanks AndreasF for your quick reply.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/152614?ContentTypeID=1Fri, 12 Oct 2018 08:12:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9c41df66-57b3-46d3-a520-3980276b8961AndreasF<p>Hi Hardik.</p> <p>If you look at the <strong>Product page</strong> and <a href="https://www.nordicsemi.com/eng/Products/Bluetooth-low-energy/nRF51822-Evaluation-Kit#Downloads"><strong>Downloads</strong></a> you can see that you should use <strong><a href="https://www.nordicsemi.com/eng/nordic/download_resource/54290/56/10960436/32925">SDK version 12.3.0</a></strong><strong>.</strong></p> <p>In our infocenter there is a section with information for SDK version 12.3.0, which you find <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk/keydef/PLUGINS_ROOT/com.nordic.infocenter.sdk5.v12.3.0/index.html?cp=4_0_7">here</a>.</p> <p>In this section you can also find a <a href="http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v12.3.0%2Fnrf51_getting_started.html&amp;cp=4_0_7_1">Getting Started Guide</a>.</p> <p>Hope this helps.</p> <p>- Andreas</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/152613?ContentTypeID=1Fri, 12 Oct 2018 08:11:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:563f18ea-2a06-454c-8f28-b629164b1152Nguyen Hoan Hoang<p>SDK12 is the latest and last for the nRF51 series</p><div style="clear:both;"></div>