This feature is a ZigBee PRO only feature (must have ZIGBEEPRO as a compile flag). This feature is similar to sending to an APS Group, but at the network layer. 您可以看一下 Z-Stack 3.0 Developer's Guide 9.8 Multicast Messages The difference between multicast and APS group messages can only be seen in very large networks where the nonmember radius will limit the number of hops away from the group.
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