https://devzone.nordicsemi.com/f/nordic-q-a/46863/mesh-light-switch-examplehi i create mesh network using the light switch client/server every things work well! i have number of client and only one server. i set the server to subscribe to the address 0xC001 and publish to the address 0xC002 and set the all clients toen-USTelligent Community 13Mon, 06 May 2019 14:35:42 GMThttps://devzone.nordicsemi.com/thread/185540?ContentTypeID=1Mon, 06 May 2019 14:35:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8e0de951-ec40-44c9-a8cb-7892be0c0989Mttrinh<p>Hi,</p> <p>Yes, you can send to a specific device by publishing to the unicast address and to multiple devices by publishing to a group address(and make them subscribe to this address).</p> <p>In this case when you want to send a message from multiple clients to one server, you can&nbsp;also have the clients publish to the server&#39;s unicast address.</p><div style="clear:both;"></div>