import serial
	import win32com.client
	import matplotlib.pyplot as plt
	import numpy as np
	ser = serial.Serial("COM6", 115200, bytesize = 8,timeout=0.5) # 打开串口
	print("我要开始了:")
	res=[]
	while (1):
	  ch = ser.readline(1)
	  result = ''
	  hLen = len(ch)
	  for i in range(hLen):
	    hvol = ch[i]
	    hhex = '%02x' % hvol
	    result += hhex + ' '
	  sz=[]
	  res.append(result)
	
	  if len(res)==100:
	    j=0
	    for i in range(len(res)-1):
	      # 十六进制转十进制
	      if "fc" in res[i]:
	        print(i)
	        sz.append(int(res[i + 1], 16)*256+int(res[i],16))
	        #print(sz)
	      else:
	        continue
	
	    print("asd")
	    print(type(sz[1]))
	
	    speaker = win32com.client.Dispatch("SAPI.SpVoice")
	    speaker.Speak("请保持均匀呼吸")
	    x = []
	    for i in range(0, len(sz)):
	      x.append(i)
	    plt.plot(x, sz)
	    plt.show()
	    print(res)
	    break