https://devzone.nordicsemi.com/f/nordic-q-a/44427/io-capabilities-of-the-devicehi all , When implementing an application, the developer has to consider all scenarios that may happen with the IO capabilities of the device. when my scenarios is My Device set &quot;display only&quot; as central (it always initiator) and connect other deviceen-USTelligent Community 13Tue, 05 Mar 2019 21:33:52 GMThttps://devzone.nordicsemi.com/thread/174388?ContentTypeID=1Tue, 05 Mar 2019 21:33:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:23e14731-4a1e-43a2-b354-db4408775819Simon<p>I would recommend you to take a look at the <a href="https://www.nordicsemi.com/DocLib/Content/SDK_Doc/nRF5_SDK/v15-2-0/lib_peer_manager">Peer Manager</a>, which is a library used to simplify the security process (bonding, pairing and encryption). Use the <a href="https://www.nordicsemi.com/DocLib/Content/SoftDevice_API_Doc/S312/v6-1-1/group_ble_gap_periph_legacy_msc">Message Sequence charts</a> for passkey bonding when implementing your solution.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/174238?ContentTypeID=1Tue, 05 Mar 2019 12:09:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f01afe99-1060-4fd6-b299-22ab40c1a4b5awneil<p>This is standard Bluetooth stuff - nothing specific to Nordic (or SiLabs).</p> <p>See, for example,&nbsp;<a href="https://blog.bluetooth.com/bluetooth-pairing-part-1-pairing-feature-exchange">https://blog.bluetooth.com/bluetooth-pairing-part-1-pairing-feature-exchange</a>&nbsp;for a description of the terms and how they are used.</p><div style="clear:both;"></div>