Can communicate between Central and Server which have different security mode/levelhttps://devzone.nordicsemi.com/f/nordic-q-a/79507/can-communicate-between-central-and-server-which-have-different-security-mode-levelHello. I am developing Central device which support LESC. I have some question about connect to Servers which have diferent LE security for example case, one of our customer have server devices which developed at different times. Among devicesen-USTelligent Community 13Tue, 14 Sep 2021 13:39:07 GMTRE: Can communicate between Central and Server which have different security mode/levelhttps://devzone.nordicsemi.com/thread/329463?ContentTypeID=1Tue, 14 Sep 2021 13:39:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:89d8a476-9b36-4b83-977c-ae8bb8d21a2atesc<p>Hi,</p> <p>Yes, the devices should be able to connect and pair regardless of capabilities. As part of the security procedure, there is a negotiation of the highest possible security level that is supported by both devices.</p> <p>Depending on the SDK and particular example, there may be additional settings that you can enable for requiring a certain security level. Apart from that you can always terminate the connection from the application if you do not get the wanted security level.</p> <p>Regards,<br />Terje</p><div style="clear:both;"></div>