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连接之后，会进行FEATURE交换，FEATURE支持的内容，能不能用户去配置，比如我不需要支持2M时，能不能把LE 2M PHY配置为No
您好，
LE的PHY是蓝牙联盟规定的低功耗蓝牙的功能。有1M PHY、2M PHY和CODED PHY。需要进行配置才会开启使用。
具体您可以参考：Developing a Bluetooth Low Energy Application » LE 2M PHY和Developing a Bluetooth Low Energy Application » LE Coded PHY
