这个实验利用睡眠定时器工作在多个电源模式下这一特性来实现定时唤醒，最长的唤醒时隔为8 分32 秒，而最短的时隔可达30 余微秒。-This experiment using sleep timer working in a number of power mode to achieve this feature from time to time to wake up, wake up after the longest 8 minutes and 32 seconds, and as soon