Send a message to provisioner(nrf85240) when button state changes in server node

Hey guys,

I am using mesh->provisioner_nrf52840 example flashed in one board, and mesh-> light_switch_server example flashed in another board

I could able to read the state of the LED if I use the mesh app for provisioning, but 

1.Can I able to send a message to provisioner(nrf85240) whenever a button is pressed in the board which runs the server example??

2.If so then can someone guide me through this??

TIA.