Can communicate between Central and Server which have different security mode/level

[Ethan.jskim]

Hello.

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 devices, some server(peripheral) device supports only JUST WORK, and some devices support security mode1 / level 3.

in this case, if my central device developed based on Nordic SDK example and support LESC(security mode1 / level4) ,

therefore, it is expected that it have a different security mode between server and central

At this time, is my central device's security mode change automatically to match server's security mode and can pairing?

That is, if my central device supports LESC, will it be able to pair and communicate with Server device which has lower security mode?

please answer.

BR

Ethan.

[tesc]

Hi,

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.

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.

Regards,
Terje