Range problems between two nRF52840 SDKhttps://devzone.nordicsemi.com/f/nordic-q-a/33104/range-problems-between-two-nrf52840-sdkHeey everyone, I&#39;m currently working on a wireless application and we would like to have a range of atleast 300 meter. Yesterday I was testing the range between 2 SDK boards and had some nice results in the morning. But at some point the range wenten-USTelligent Community 13Fri, 06 Apr 2018 13:01:08 GMTRE: Range problems between two nRF52840 SDKhttps://devzone.nordicsemi.com/thread/127227?ContentTypeID=1Fri, 06 Apr 2018 13:01:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a10f8da6-1caf-44e3-93f2-c46d24b96003Sigurd<p>Hi,</p> <p><span>A&nbsp;theory is that you have a nRF52840-PDK with an Engineering B nRF52840 IC.</span></p> <p><span>Looking at <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52/dita/nrf52/compatibility_matrix/nRF52840_ic_rev_sdk_sd_comp_matrix.html?cp=2_0_2_2">this combability matrix</a>, Engineering B is only fully compatible with SDK 15 and the S140 SoftDevice version 6.0.0</span></p> <p><span>I would therefore strongly recommend that you test with the ATT_MTU Throughput Example in SDK 15.0 instead.</span></p> <p><span>SDK 15 can be downloaded from <a href="https://www.nordicsemi.com/eng/nordic/Products/nRF5-SDK/nRF5-SDK-zip/59011">here</a>.</span></p><div style="clear:both;"></div>