https://devzone.nordicsemi.com/f/nordic-q-a/69552/message-to-group-applied-not-to-all-nodeshi guys i develop mobile app for iOS and use nrfMesh lib v3.0-beta1. i have few nodes subscribed to a group. I send GenericLevelSet message to a group and receive successful response, but sometimes i see that message applied not to all nodes in theen-USTelligent Community 13Wed, 16 Dec 2020 14:01:28 GMThttps://devzone.nordicsemi.com/thread/285358?ContentTypeID=1Wed, 16 Dec 2020 14:01:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d63f4d25-1140-42c0-9787-9c2b70319870Hung Bui<p>Hi Oleksandrm,&nbsp;</p> <p>Could you describe with more detail how you found out that the message didn&#39;t get to all nodes in the group ?&nbsp;<br />How do you allocate the nodes in your mesh network ? How many node configured as relay nodes ?&nbsp;<br />There could be a chance that the packet was corrupted due to interference or if the node doesn&#39;t do scanning at the time. And if you don&#39;t have enough redundancy (multiple relay nodes to cover one end node)&nbsp;<br />If you printout the destination address of the packets you would know if it addresses the group or not. You can try print that out on both the original node, and the destination nodes (the nodes subscribed to the groups address).&nbsp;</p><div style="clear:both;"></div>