我目前正在进行一个涉及模拟读数并实时在图表上映射的项目。为此,我通过Arduino模拟端口运行光敏电阻,并通过Python 3.4.3读取数据。在Python端,我已安装了maplotlib和drawnow。如下所示的代码将绘制电阻器读取的第一个数据标记,但不会实时更新它。但是,如果我更改电阻值并重新启动程序,则会连续绘制新值。我希望随着光敏电阻值的变化,图表上的值也会相应变化。
import serial # import from pySerial
import numpy # import library from Numerical python
import matplotlib.pyplot as plt # import Library from matplotlib
from drawnow import drawnow # import lib from drawnow
ConF = [] # create an empty array for graphing
ArduinoData = serial.Serial('com3',9600) # set up serial connection with arduino
plt.ion() # tell matplotlib you want interactive mode to plot data
cnt = 0
def makeFig(): # creat a function to make plot
plt.plot(ConF, 'go-')
while True: # loop that lasts forever
while (ArduinoData.inWaiting()==0): # wait till there is data to plot
pass # do nothing
arduinoString = ArduinoData.readline()
dataArray = arduinoString
Con = float(arduinoString) # turn string into numbers
ConF.append(Con) # addinf to the array.
drawnow(makeFig) # call draw now to update
plt.pause(.000001)
cnt=cnt+1
if(cnt>50):
ConF.pop(0)
我不确定我的错误在哪里,没有错误信息...它只是一次又一次地绘制相同的数据点。任何帮助都将不胜感激。