Sending a message to a BLE mesh node through advertising.


I know about the proxy feature/nodes and the way in which a smartphone can connect to a proxy node and send a message. However, in the mentioned method we need to connect to a node (which must have the proxy feature)!  

I was wondering, can I use an application like nRF connect or a customized app in order to to do the advertising and in this way, I send my desired set/get message to any node in the range?

In this way the connection and existence of a proxy node is not needed anymore, probably the main problem is the NetKey but there should be a solution for that,