bt_mesh_gatt_proxy_set() function

0 Successfully changed the GATT Proxy feature state. -ENOTSUP The GATT Proxy feature is not supported. -EINVAL Invalid parameter. -EALREADY Already in the given state.

The GATT Proxy feature only controls a Proxy node's ability to relay messages to the mesh network. A node that supports GATT Proxy will still advertise Connectable Proxy beacons, even if the feature is disabled. The Proxy feature can only be fully disabled through compile time configuration.