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1、3.40及以上的协议栈已经支持在AOA时连接多个从设备：It is now possible to follow up to eight connections while doing AoA. This allows one master to follow multiple slave nodes.。建议可以从multi role开始
2、理论上此值跟芯片处理能力及内存相关，具体看应用，无法给出明确数据
