How three Bluetooths will communicate using x-cube-blemesh1 package?

[Anitha]

Three Bluetooth nodes are available, in that two Bluetooths are within the range of app and one is away from app, through which node it will communicate with third node among two? In the firmware where it will decide? where can I find relay node functionality in the firmware? what is callback for calling relay node functionality?

[alok]

By default Relay functionality is enabled for all nodes. This configuration is in mesh_cfg_usr.h by following macros

#define ENABLE_RELAY_FEATURE

#define ENABLE_PROXY_FEATURE

#define ENABLE_FRIEND_FEATURE

So, if there are 3 nodes, any of the 2 nodes can communicate with the 3rd node which is 2 hops away