利用51实现超温报警，当温度超过一定范围时蜂鸣器报警-Take advantage of 51 over-temperature alarm buzzer alarm when the temperature exceeds a certain range

超声波us100 在ok6410下的字符驱动程序，在驱动中完成测距，把距离通过ioctl返回到用户空间-Under ultrasonic us100 ok6410 character driver, complete range in the drive, the distance through the ioctl returned to the user space

稀疏傅里叶变换算法利用了数字信号处理，特别是高斯和多尔夫-切比雪夫滤波器的技术。与传统的解决方法不同，对于这个问题我们的算法是不迭代的。也就是说，它用一种类似绘制/流式算法的方式“一次”识别并估计k个最大系数，而并非估计“大”系数以及在提示下相减、递归。-Sparse Fast Fourier Transform (SFFT) is a class of sub-linear time algorithms for computing the discrete Fourier transfo

the existing 802.11 standards can be optimized (especially in terms of energy-efficiency) to make Wi- Fi suitable for a wide range of IoT applications. However, there is a lack of low-cost embedded platforms that can be used for experimentation wi