TI中文支持网Z-stack Home 1.2.2a版，Group发送是用的NWK层的Multicast，Z-stack 3.0.0则用的是APS Group Address，到底哪个才是正确的？为什么使用前者，一定要把发送者也要添加到该Group中？
Susan Yang：
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 nonmemberradius will limit the number of hops away from the group.
