调用Matplotlib库动态显示脉搏波波形;通过对原始数据做快速傅里叶变换后得到脉搏波的频率、直流分量、交流分量,分别代入计算公式后得到心率、血氧值,并在3.2寸电阻触摸屏显示;通过ESP8266WiFi模块,使STM32与手机进行通信,将测量结果实时更新到手机APP上。
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