Show real time temperature and storage with Python

Show real time temperature and storage with Python - Printable Version

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Show real time temperature and storage with Python - linkxxx - Aug-28-2019

import serial
import matplotlib.pyplot as plt
from drawnow import *

values = []
plt.ion()
cnt=0

serialArduino = serial.Serial('COM3', 115200)

def plotValues():
    plt.title('Serial value from Arduino')
    plt.grid(True)
    plt.ylabel('Values')
    plt.plot(values, 'rx-', label='values')
    plt.legend(loc='upper right')

#pre-load dummy data

    
while True:
    while (serialArduino.inWaiting()==0):
        pass
    valueRead = serialArduino.readline()
    print(valueRead)

I'm getting the temperatures like this:
---------------------------------------
b'27.39 , 27.22\r\n'
b'27.35 , 27.27\r\n'
b'27.44 , 27.33\r\n'
b'27.41 , 27.37\r\n'
b'27.39 , 27.33\r\n'
-------------------------------------------------
How I can fix this error and get clean result, and also how I can graph in real time and storage the data?

Thank you so much for the help.

RE: Show real time temperature and storage with Python - buran - Aug-28-2019

>>> data = b'27.39 27.22\r\n'
>>> data.decode()
'27.39 27.22\r\n'
>>> print(data.decode())
27.39 27.22

>>>

RE: Show real time temperature and storage with Python - linkxxx - Aug-28-2019

Thank you so much for the answer, but if I I wanna decode not on the shell but inside the module, how I have to write ?

RE: Show real time temperature and storage with Python - buran - Aug-28-2019

my example is in the console because I cannot reproduce your code with Aurdino. Use decode()
e.g. line 25 should be

print(valueRead.decode())

note thar you will get 2 new lines after each printed value because of \r\n
if you want to remove these, use strip(), e.g. valueRead.decode().strip()

RE: Show real time temperature and storage with Python - linkxxx - Aug-28-2019

really thank you so much for the help, now it's appearing really well.
I will try to fix now the part about the graph, because I defined, but I don't get.