https://devzone.nordicsemi.com/f/nordic-q-a/1336/does-s120-work-on-sdk-4-4Hello, I use PCA10001 v1.0(nRF51822 QFAACA). But, S120 example is supplied with &quot;nRF SDK v5.1&quot; which support only PCA10001 v2.0 over. When I tested S120+&quot;nRF SDK v5.1&quot; to work on my device, it looked like working well. My questions are en-USTelligent Community 13Tue, 14 Jan 2014 15:51:22 GMThttps://devzone.nordicsemi.com/thread/6094?ContentTypeID=1Tue, 14 Jan 2014 15:51:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0c1f6e25-2b68-48f7-98c4-96cd3c3884b7Ole Morten<p>The S120 does not get tested on first revision chips (CA, C0), so there could be unknown problems with this combination. Our official recommendation is hence to only use S120 on second revision chips.</p> <p>There will be an updated version of the migration whitepaper, that includes the S120 in the compatibility matrix.</p><div style="clear:both;"></div>