A node forms a connection-less mesh network with one or more other nodes. The node controls to generate an identifier that identifies the node; to update the identifier and a data payload; to periodically wirelessly broadcast, at a predetermined frequency, broadcast-information that comprises the generated identifier and the updated data payload; and to periodically receive, at a predetermined frequency, other-broadcast-information which is the broadcast-information respectively broadcast from each of the one or more other nodes. The one or more processors performs the update of the identifier and the data payload in accordance with the other-broadcast-information from the other nodes.