我有个工程基于SimpleBLEPeripheral例程，要用到SPI控制传感器和IO控制LED，它们都是每隔好几秒才用一次。蓝牙也是好几秒发一次广播，不需要连接。
请问在等待的时候我应该做哪些操作才能最省电？我听说操作IO口就不能进入低功耗模式，我应该关掉所有IO吗？
谢谢。
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