What types of nodes does Bluetooth mesh support?

Relay: A node that has the relay feature enabled can receive and retransmit messages Low Power Node (LPN): A LPN will spend much of its time in a low power mode and is therefore unable to relay messages in this state. See Friend Node. Friend Node: A Friend Node will store and forward messages intended for a Low Power Node. Messages are delivered when the LPN polls the Friend Node. Proxy Node: Acts as a bridge between GATT and advertising bearers