https://devzone.nordicsemi.com/f/nordic-q-a/11440/can-i-connect-to-nrf51-without-advertisingI wonder if I can connect to my device without advertising in order to save energy just by knowing the device addressen-USTelligent Community 13Fri, 22 Jan 2016 02:11:16 GMThttps://devzone.nordicsemi.com/thread/43164?ContentTypeID=1Fri, 22 Jan 2016 02:11:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d414bb24-d230-445e-86bc-93956a43f0ecxtting<p>If you go detail into the BLE protocol. The connetion event can only do from the central device side, when &amp; immediately after it recieve the broadcast package.</p> <p>So, what you want is not under the BLE protocol. You can&#39;t.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/43163?ContentTypeID=1Wed, 20 Jan 2016 20:53:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cc13d9ae-e834-4f62-9cd6-c58f1a3fc159Dave_couling<p>No, this is not possible. You could use directed advertising and synchronize your advertising to scanning to reduce connection time. If you configure your FW correctly advertising shouldn&#39;t consume alot of power.</p><div style="clear:both;"></div>