https://devzone.nordicsemi.com/f/nordic-q-a/55964/lesc-connection-with-android-peripheralHow can I do LESC on my central with an Android peripheral device, if with each new connection the MAC address on Andriod changed randomly? The first time I am making a bonding, but after reconnecting the Android changes the MAC address but the peeren-USTelligent Community 13Mon, 30 Dec 2019 05:20:53 GMThttps://devzone.nordicsemi.com/thread/227025?ContentTypeID=1Mon, 30 Dec 2019 05:20:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c0623dd4-4529-42d9-b4ac-38a23cadee96Vladislav Kolodiev<p>Thank you <span class="user-name"><a class="internal-link view-user-profile" href="https://devzone.nordicsemi.com/members/hungbui">Hung Bui</a></span>, we solved this problem. The problem was on the side of the Android application. Android driver in case of random address generation latches the current address in case of bonding</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/226956?ContentTypeID=1Fri, 27 Dec 2019 16:07:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4d3cc9dc-9209-458f-867c-ea2b48e7ccb6Hung Bui<p>Hi Vladislav,&nbsp;</p> <p>It depends on the configuration on the phone if it uses the static address or it uses the random resolvable address , the address may change or not.&nbsp;</p> <p>If the phone uses random resolvable address (which phones usually do) there should be an IRK exchange so that the central will have the IRK to detect if the new address belong to the previously bonded device or not.&nbsp;</p> <p>If you can capture a sniffer trace, we can have a look and tell if the phone uses the resolvable random address or not and if the IRK is exchanged or not. Download the sniffer here:&nbsp;<a href="https://www.nordicsemi.com/Software-and-Tools/Development-Tools/nRF-Sniffer">https://www.nordicsemi.com/Software-and-Tools/Development-Tools/nRF-Sniffer</a></p><div style="clear:both;"></div>