https://devzone.nordicsemi.com/f/nordic-q-a/38270/bonding-and-reconnecting-to-a-single-centralHi, I&#39;m trying to implement the following use case: On the first button push a sensor advertise and bonds with a smartphone. I do it the following way and it works fine Now on the next push of the button I would like to establish a secured connectionen-USTelligent Community 13Sun, 09 Sep 2018 08:46:53 GMThttps://devzone.nordicsemi.com/thread/147898?ContentTypeID=1Sun, 09 Sep 2018 08:46:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2271a88b-536b-4786-8ddc-d194c4598b2ceyalasko<p>will give it a shot. Thanks!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/147810?ContentTypeID=1Fri, 07 Sep 2018 12:46:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d1ea5d90-eebc-40f6-8ed5-efdf7a13fcf9Einar Thorsrud<p>Hi,</p> <p>This is a perfect example of where you want to use the whitelisting functionality. Using a whitelist, you say that only the peers in the whitelist are allowed to connect. I recommend you refer to the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.0.0/ble_sdk_app_cts_c.html?cp=4_0_1_4_1_2_7">Current Time Application</a>&nbsp;for an example on how to advertise using a whitelist.</p><div style="clear:both;"></div>