Mesh Provisioning and Messaging

[JasmineRandhawa]

Hello,
I have a query.
Suppose I have two nrf52840 boards B1 and B2. My purpose is to set up mesh network between B1 and B2 and exchange messages .
For that I have made B1 provisioner by flashing it with bluetooth/mesh_provisioner sample and I have made the B2 as unprovisioned beacon by running bluetooth/mesh sample on it . B1 is successfully able to create a mesh network and add B2 as node.

Now I wish to track B2’s proximity to B1 and for that I would require to send B2’s rssi value to B1. How do i send this value using mesh network and which sample i can use to do it.

Thanks for any help