https://devzone.nordicsemi.com/f/nordic-q-a/16267/sdk-12-migration-and-compatibilityHi All, Just noticed SDK12 was released last week, with build in support for S132, v 3.0.0. Judging from the compatibility matrix and notes, it looks like it removed support for nrf52 engineering revisions A and B. So to confirm, PCA10040 dev kitsen-USTelligent Community 13Mon, 12 Sep 2016 06:43:50 GMThttps://devzone.nordicsemi.com/thread/62165?ContentTypeID=1Mon, 12 Sep 2016 06:43:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:50040b54-ec09-4dba-a913-14330ccd3e2fStefan Birnir Sverrisson<p>Hi</p> <p>That is correct, SDK 12 is not compatible with nRF52 Enineering A and Engineering B hardware revisions. This generally means that SDK 12 has not been tested with this hardware and their anomalies have not been considered in the development and testing phase of SDK 12. SDK 12 may however work with Engineering A and Engineering B, probably depending on what modules and perhipherals you intend to use. We recommend anyway that you purchase a new nRF52-DK with revision 1 nRF52 on board to use with SDK 12 and beond, it is probably worth the cash instead of facing potential compatibility issues.</p><div style="clear:both;"></div>