Thank you very much for your response. I will make these changes to the
code asap. As for the list teml, I agree it is not implemented well. I plan
to improve the code as soon as I make these changes.
On Thursday, February 23, 2017 at 1:15:19 AM UTC-6, Eric Afyouni wrote:
>
> Hi,
>
> I've just recently started learning Python and wrote this code to plot
> temperature data coming from an Arduino Uno over serial to a Raspberry Pi.
> I've been researching and trying different methods to try and stop the
> memory leak, but nothing seems to work. I'm not sure if the issue is with
> plotting or collecting the data. I've slowed down the accumulation, but at
> this point I need help figuring out what I have done wrong. Any help that
> can be provided is great.
>
> import re
> import datetime
> import pyqtgraph as pg
> from PyQt5 import QtCore,QtGui
> import numpy as np
> import serial
> import csv
>
> ser = serial.Serial('/dev/ttyACM0', 9600)
>
> teml = []
> numeric_const_pattern = r'[-+]?(\d+\.\d+|\d+)'
>
> def parser(command):
>
> first_bit = re.findall(r'\b[A-Za-z]+',command)
> command_value = re.findall(numeric_const_pattern,command)
>
> decision(first_bit, command_value)
>
> def decision(letter, number):
>
> cmd_bits = 'Temp', 'X', 'A'
>
> if cmd_bits[0] in letter:
> Temperature_plotting(number[0])
> del number[:]
> else:
> pass
>
> def Temperature_plotting(temperature):
>
> ctim = datetime.datetime.now().time()
> resetim = datetime.time(0, 0, 10, 0)
>
> teml.append(float(temperature))
>
> if len(teml) >= 1000:
>
> with open('daily_temp_data.csv', 'a') as csvfile:
> fieldnames = ['Date Stamp','Max','Min']
> writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
> x = datetime.date.today()
> max_temp = max(teml)
> min_temp = min(teml)
> writer.writerow({'Date Stamp': x,'Max': max_temp,'Min':
> min_temp})
>
> del teml[:]
>
> return(teml)
>
>
> pw = pg.plot(clear=True)
> pw.setLabel('left', text='Temp', units='F')
> pw.setLabel('bottom', text='Time', units='n*5sec')
> pw.setTitle('Temperature')
> pw.showGrid(True, True)
> pw.showLabel('left', True)
> pw.showLabel('bottom', True)
> pw.showLabel('top')
> pw.setYRange(20, 100, padding=0)
>
> while True:
>
> if ser.inWaiting:
> cmd = str(ser.readline())
> parser(cmd)
> ser.flushInput()
>
> pw.plot(teml[:-1], clear=True)
>
> pg.QtGui.QApplication.processEvents()
>
>
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