https://devzone.nordicsemi.com/f/nordic-q-a/28495/light-switch-nrf51-can-t-find-nrf52-boardHi I use nrf5_SDK_for_Mesh_v0.10.0-Alpha_src\examples\light_switch for test; if one nrf51 dk board work as client and one nrf51 dk board work as server, or one nrf52 dk board work as client and one nrf52 dk board work as server; they can work fineen-USTelligent Community 13Wed, 22 Nov 2017 15:03:10 GMThttps://devzone.nordicsemi.com/thread/112740?ContentTypeID=1Wed, 22 Nov 2017 15:03:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ec1a9fbe-b2c7-447c-a9e7-2d0d04c4f830Bj&#248;rn Kvaale<p>Try using the <a href="https://www.nordicsemi.com/eng/nordic/Products/nRF5-SDK-for-Mesh/nRF5-SDK-for-Mesh/62377">latest mesh sdk</a> (v 0.10.1) &amp; see if that helps. There were some bugfixes in the latest version.</p><div style="clear:both;"></div>