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CC2530: Z-Stack Home 1.2.2a,组播问题?

Part Number: CC2530

afAddrType_t test_DstAddr;
test_DstAddr.addrMode = (afAddrMode_t)AddrGroup;
test_DstAddr.endPoint = 8;
test_DstAddr.addr.shortAddr = 1;
zclGeneral_SendOnOff_CmdToggle( VOICEBOT_ENDPOINT, &test_DstAddr, FALSE, 0 );

这是组播地址没有错吧?为什么实际发送的时候通过抓包显示,发送router request ,请求地址0x0001。不是组播。组播的前提是设备必须在组内才能发送组播消息吗?