https://devzone.nordicsemi.com/f/nordic-q-a/9295/sdk-installHi all, It is possible to install and develop projects using 2 SDK versions simultaneously? nrf51 SDK will be used in the current project and nrf52 SDK will be used for future project. Actually I am using Keil IDE version5.Regards, Marcioen-USTelligent Community 13Mon, 21 Sep 2015 17:11:16 GMThttps://devzone.nordicsemi.com/thread/34297?ContentTypeID=1Mon, 21 Sep 2015 17:11:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c08ca3fb-93e6-4f14-9d6f-e63c4877fbcaMarcio Montenegro<p>Thank you for reply Stefan.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/34296?ContentTypeID=1Mon, 21 Sep 2015 16:37:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:76b941ff-335d-4cea-b7a4-389430a48424Stefan Birnir Sverrisson<p>Hi Marcio</p> <p>That is possible yes. As mentioned in the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52.v1.0.0/migration/software.html?cp=1_3_2">nRF52 migration document</a>, the latest upgrade in the toolchain supports both nRF51 and nRF52. Use zip SDK (not packs) and keep the nRF51 SDK and nRF52 SDK directory trees seperate, and you should be able to compile both nRF51 and nRF52 projects on the same PC.</p><div style="clear:both;"></div>