https://devzone.nordicsemi.com/f/nordic-q-a/49680/how-to-determine-the-version-of-bluetooth-protocolIf I use sdk12.3 pca10040 S132 softdevice is s132_nrf52_3.0.0_softdevice.hex How do I determine what version of Bluetooth it is? In SDK or where the document has instructions？en-USTelligent Community 13Tue, 16 Jul 2019 07:48:35 GMThttps://devzone.nordicsemi.com/thread/198620?ContentTypeID=1Tue, 16 Jul 2019 07:48:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8b80059c-2f17-4258-a259-65f762091c44Joakim Jakobsen<p>Hi.&nbsp;</p> <p>If you take a look at the <a href="https://infocenter.nordicsemi.com/pdf/S132_SDS_v3.0.pdf" rel="noopener noreferrer" target="_blank">Softdevice specification for the S132 v.3.0.0</a>, you can see that it is a&nbsp;Bluetooth<span class="emoticon" data-url="https://devzone.nordicsemi.com/cfs-file/__key/system/emoji/00ae.svg" title="Registered">&#x00ae;</span> 4.2 compliant low energy single-mode protocol stack.</p> <p>Best regards,&nbsp;<br />Joakim Jakobsen</p><div style="clear:both;"></div>