Private Beacon Server

The Private Beacon Server model is a foundation model defined by the Bluetooth mesh specification. It is enabled with CONFIG_BT_MESH_PRIV_BEACON_SRV option.

The Private Beacon Server model is introduced in the Bluetooth Mesh Protocol Specification version 1.1, and controls the mesh node’s Private Beacon state, Private GATT Proxy state and Private Node Identity state.

The Private Beacons feature adds privacy to the different Bluetooth Mesh beacons by periodically randomizing the beacon input data. This protects the mesh node from being tracked by devices outside the mesh network, and hides the network’s IV index, IV update and the Key Refresh state. The Private Beacon Server must be instantiated for the device to support sending of the private beacons, but the node will process received private beacons without it.

The Private Beacon Server does not have an API of its own, but relies on a Private Beacon Client to control it. The Private Beacon Server model only accepts messages encrypted with the node’s device key.

The application can configure the initial parameters of the Private Beacon Server model through the bt_mesh_priv_beacon_srv instance passed to BT_MESH_MODEL_PRIV_BEACON_SRV. Note that if the mesh node stored changes to this configuration in the settings subsystem, the initial values may be overwritten upon loading.

If present, the Private Beacon Server model must only be instantiated on the primary element.

API reference

group bt_mesh_priv_beacon_srv

Defines

BT_MESH_MODEL_PRIV_BEACON_SRV

Private Beacon Server model composition data entry.