Attachment 565 Details for Bug 1463 – code example in python

code example in python

Logger_TC309.py (text/plain), 3.79 KB, created by tetzlav on 2019-12-23 09:49:13 CET

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Creator: tetzlav

Created: 2019-12-23 09:49:13 CET

Size: 3.79 KB

patch

obsolete

>#! /usr/bin/python
># -*- coding: utf-8 -*-
>"""
>Created on Mo 16 15:28:31 2019
>
>Modul pySerial + numpy have to be installed
>python -m pip install pyserial numpy
>
>Edit File until DEBUG variable and start script via 
>python Logger_TC309.py
>
>@author: tetzlav@web.de
>"""
>
># importieren modules
>import serial, time, os, numpy, signal, sys
>
># Output filename
>#OUTFILE = "TC309_Temperaturen_" + time.strftime("%d-%m-%Y_%H-%M-%S") + ".csv"  
>OUTFILE = "TC309_Temperaturen_" + time.strftime("%d-%m-%Y") + ".csv"  
>
># row seperator in output file
>ROWSEP = ","
>HEAD = ["Datum/mytime", "T1/Â°C", "T2/Â°C", "T3/Â°C", "T4/Â°C"]
>
># should be data append if outfile exits
>APPEND = True
>
># newline character
>NL = "\n"
>
># number of reads, 0 means endless loop
>REPEAT = 0
>
># linux serial device file or windows COMX port
>PORT = 'COM15'
>
># reading interval in seconds
>INTERVAL = 3
>
># enable debugging output
>DEBUG = False
>
># catch CTRL + C for clean exit
>def signal_handler(signal, frame):
>  print("Catch [CTRL] + [C] .\nWrote output to \"%s\"." %OUTFILE)
>  sys.exit(0)
>
>signal.signal(signal.SIGINT, signal_handler)
>
># open serial port
>Serial = serial.Serial(PORT, timeout=2)
>
># open outfile
>os.system('cls')
>if APPEND and os.path.exists(OUTFILE):
>	dat = open(OUTFILE, 'a')
>	print("Output will be append to \"%s\".\n[CTRL] + [C] will stop logging.\n" %OUTFILE)
>else:
>	dat = open(OUTFILE, 'w')
>	dat.write(ROWSEP.join(HEAD)+NL)
>	print("Output will be wrote to new file \"%s\".\n[CTRL] + [C] will stop logging.\n" %OUTFILE)
> 
>x = 0  
>if not REPEAT:
>	last = 1
>else:
>	last = REPEAT
>while x < last:
>	if REPEAT:
>		x += 1
>	mytime = time.time()
>	mytimesformat = time.strftime("%d.%m.%Y %H:%M:%S")
>	Serial.write(b"A")
>	data = bytearray(Serial.read(45))
>	if len(data) < 45:
>		print ("no or faulty data!")
>		print ("(answer was %i byte long.)" % len(data))
>		break
>	databits = numpy.unpackbits(data)
>	
>	if DEBUG:
>		print("---")
>		i = 1
>		n = 0
>		print('Byte#: {0:>2d}   Data: {1:>3d}   Bits: '.format(n + 1, data[n]), end = '')
>		for b in databits:
>			if i % 8 == 0:
>				print(b)
>				#print(n)
>				#print(len(data))
>				if n < (len(data) - 1):
>					n += 1
>					print('Byte#: {0:>2d}   Data: {1:>3d}   Bits: '.format(n + 1, data[n]), end = '')
>			else:
>				print(b,  end = ' ')
>			i += 1
>		print("---")
>	
>	# decode data
>	"""
>	positive temperatures: if data(byte1) <  240: (data[byte1]*256 + data[byte1 + 1])*0.1
>	negative temperatures: if data(byte1) >= 240: ((data[byte1]-255)*256 + (data[byte1 + 1]-256))*0.1
>	T1 Byte  8 +  9, OL = Byte 4 Bit 1 (Bit 32 of all 45 Byte)
>	T2 Byte 10 + 11, OL = Byte 5 Bit 1 (Bit 40 of all 45 Byte)
>	T3 Byte 12 + 13, OL = Byte 6 Bit 1 (Bit 48 of all 45 Byte)
>	T2 Byte 14 + 15, OL = Byte 7 Bit 1 (Bit 56 of all 45 Byte)
>	"""
>	# set default values
>	temps = [9999.9, 9999.9, 9999.9, 9999.9]
>	# start byte 8 (- 1)
>	byte = 7
>	# start temperatur 1 (- 1)
>	temp = 0
>	# Bit [32, 40, 48, 56] (- 1) check temp channel is not OL and read data
>	for bit in range(31, 56, 8):
>		if DEBUG: print("T{0:1d}   Bit: {1:2d}   Byte: {2:2d}\n---".format(temp + 1, bit, byte + 1, ))
>		if databits[bit] == 1:
>			if data[byte] < 240:
>				temps[temp] = (data[byte] * 256 + data[byte + 1]) * 0.1
>			else:
>				temps[temp] = ((data[byte] - 255) * 256 + (data[byte + 1] - 256)) * 0.1
>		temp += 1
>		byte += 2
>	
>	# console log
>	print ("[{0}]     T1:{1:>7.1f} Â°C     T2: {2:>7.1f} Â°C      T3: {3:>7.1f} Â°C     T4: {4:>7.1f} Â°C".format(time.strftime("%d.%m.%Y %H:%M:%S"), temps[0], temps[1], temps[2], temps[3]))
>	
>	# fiel log
>	line = [mytimesformat, "{T:4.1f}".format(T=temps[0]), "{T:4.1f}".format(T=temps[1]), "{T:4.1f}".format(T=temps[2]), "{T:4.1f}".format(T=temps[3])]
>	dat.write(ROWSEP.join(line)+NL)
>	dat.flush()
>	time.sleep(INTERVAL - (time.time() - mytime))
>
>dat.close()

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