Any nRF52840 examples for BLE Mesh?

Hi all,

I have three nRF52840 DK. I would like to play around with Bluetooth Mesh, but I can not find any examples. It would be perfect if in the end I will have a gateway (connected to e.g smartphone) and two nodes. I need sth to check how BLE Mesh works.

There are some examples? or if not do you have some advice how to start, what libraries I need?