https://devzone.nordicsemi.com/f/nordic-q-a/55972/sending-message-to-all-nodes-over-mesh-identify-senderI&#39;m trying to use the information from this devpost: https://devzone.nordicsemi.com/f/nordic-q-a/39629/how-to-send-data-to-all-node-over-mesh However, my remaining questions are: 1) I just need to send a simple on/off, but I also want the nodes thaten-USTelligent Community 13Tue, 14 Jan 2020 13:36:09 GMThttps://devzone.nordicsemi.com/thread/229055?ContentTypeID=1Tue, 14 Jan 2020 13:36:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dc04631e-9a40-4dce-94b3-130e5fc56b6aJoakim Jakobsen<p>Hi.&nbsp;</p> <p>I apologize for the delay here.&nbsp;</p> <p>1) This is possible and already available in the Mesh SDK. You can use reliable messages to ensure that the node receives the message. When using the&nbsp;<span>reliable publish you will get a response acknowledging that the message is received.</span></p> <p><span>2)&nbsp;If you want to send data from the server node to the client node, you can implement a client on the server node and a server on the client node as well. That way you will be able to send data both ways.&nbsp;</span></p> <p><span>3) The relay functionality is optional, so you can enable it or disable it as you please. Note that if you want a more reliable network, it is recommended to multiple relay nodes. Having multiple relay nodes can ensure that the message can take different routes if one relay node is unavailable. However, how many relay nodes you want is all up to you. In most of the examples in the Mesh SDK, the relay functionality is enabled by default.&nbsp;</span></p> <p><span>Best regards,&nbsp;<br />Joakim&nbsp;</span></p><div style="clear:both;"></div>