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peripheral+observer角色,连接状态下很难扫描到设备

 请教下 peripheral+observer角色,在广播态 扫描到固定mac地址的广播数据很快,但是保持链接的情况下 开启扫描,扫描到固定的mac地址的广播数据 的时间很长,有什么好的办法吗?加大链接间隔没有效果