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datalogger.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import argparse, time, os, instruments, inspect
#==============================================================================
# Path
PATH = os.getcwd()
# Sampling time acquisition
SAMPLING_TIME = 1
# File duration
FILE_DURATION = 3600*24
# Default instrument
INSTRUMENT = None
# Default instrument adress
ADRESS = None
#Default val type
VAL_TYPE = None
#==============================================================================
def parse():
"""
Specific parsing procedure for transfering data from any abstract instrument.
:returns: populated namespace (parser)
"""
parser = argparse.ArgumentParser(description = 'Acquire data from INSTRUMENT',
epilog = 'Example: \'./datalogger.py -i myInstrument -st 10\' logs myInstrument every 10 seconds to output file YYYYMMDD-HHMMSS-INSTRUMENT.dat')
parser.add_argument('-l',
action='store_true',
dest='list',
default=False,
help='List all available instruments')
parser.add_argument('-I',
action='store',
dest='instLog',
default=INSTRUMENT,
help='Instrument to log (default '+str(INSTRUMENT)+')')
parser.add_argument('-ip',
action='store',
dest='adress',
default=ADRESS,
help='Adress of instrument (IP, USB...) (default '+str(ADRESS)+')')
parser.add_argument('-v',
action='store',
dest='vtype',
default=VAL_TYPE,
help='Value type to measure (default '+str(VAL_TYPE)+')')
parser.add_argument('-st',
action='store',
dest='samplingtime',
default=SAMPLING_TIME,
help='Sampling time acquistion (default '+str(SAMPLING_TIME)+' second)')
parser.add_argument('-fd',
action='store',
dest='fileduration',
default=FILE_DURATION,
help='File duration (infinite : \'-fd -1\') (default '+str(FILE_DURATION)+' second)')
parser.add_argument('-p',
action='store',
dest='path',
default=PATH,
help='Absolute path (default '+PATH+')')
args = parser.parse_args()
return args
#==============================================================================
def acq_routine(instrument, path, samplingtime, fileduration):
instrument.connect()
t0 = time.time()
filename = time.strftime("%Y%m%d-%H%M%S", time.gmtime(t0)) + '-' + instrument.model() + '.dat'
print('Opening %s' %filename)
try:
year = time.strftime("%Y", time.gmtime(t0))
month = time.strftime("%Y-%m", time.gmtime(t0))
os.chdir(path + '/' + year + '/' + month)
except:
try:
os.chdir(path + '/' + year)
os.mkdir(month)
os.chdir(path + '/' + year + '/' + month)
except:
os.chdir(path)
os.mkdir(year)
os.chdir(path + '/' + year)
os.mkdir(month)
os.chdir(path + '/' + year + '/' + month)
data_file = open(filename, 'wr', 0)
# Infinite loop
while True:
# tic
tic = time.time()
if time.time() - t0 >= fileduration:
t0 = time.time()
print('Closing %s
' %filename)
data_file.close()
try:
year = time.strftime("%Y", time.gmtime(t0))
month = time.strftime("%Y-%m", time.gmtime(t0))
os.chdir(path + '/' + year + '/' + month)
except:
try:
os.chdir(path + '/' + year)
os.mkdir(month)
os.chdir(path + '/' + year + '/' + month)
except:
os.chdir(path)
os.mkdir(year)
os.chdir(path + '/' + year)
os.mkdir(month)
os.chdir(path + '/' + year + '/' + month)
filename = time.strftime("%Y%m%d-%H%M%S", time.gmtime(t0)) + '-' + instrument.model() + '.dat'
print('Opening %s
' %filename)
data_file = open(filename, 'wr', 0)
try:
try:
#epoch time
epoch = time.time()
#MJD time
mjd = epoch / 86400.0 + 40587
# Meas values
meas = instrument.getValue()
meas = meas.replace(",", "\t")
meas = meas.replace(";", "\t")
meas = meas.replace("+", "")
string = "%f\t%f\t%s" % (epoch, mjd, meas)
data_file.write(string) # Write in a file
print(string)
# Sleep until sampletime
time.sleep(samplingtime - (time.time() - tic))
except Exception as ex:
print 'Exception during controler data reading: ' + str(ex)
except KeyboardInterrupt:
print '
--> Disconnected'
instrument.disconnect()
data_file.close()
# To stop the loop in a clean way
break
#==============================================================================
def main():
"""
Main script
"""
# Parse command line
args = parse()
# path
path = args.path
# Sampling time
samplingtime=float(args.samplingtime)
# File duration
fileduration=int(args.fileduration)
# Instrument to log
instLog = args.instLog
# instrument adress
adress = args.adress
# val type
vtype = args.vtype
try:
if args.list:
print('
Instruments:')
for name, obj in inspect.getmembers(instruments):
if inspect.ismodule(obj) and name.startswith('__') == False and name.startswith('abstract') == False:
print('
' + name)
exec('print("\t" + instruments.%s.ALL_VAL_TYPE)'%name)
else:
if instLog == None:
raise Exception('No instrument selected !')
if adress == None and vtype == None:
exec('myInstrument = instruments.%s.%s()'%(instLog, instLog))
elif adress == None and vtype != None:
exec('myInstrument = instruments.%s.%s(vtype="%s")'%(instLog, instLog, vtype))
elif adress != None and vtype != None:
exec('myInstrument = instruments.%s.%s(adress="%s", vtype="%s")'%(instLog, instLog, adress, vtype))
acq_routine(myInstrument, path, samplingtime, fileduration)
except Exception as ex:
print 'Oops: '+str(ex)
#==============================================================================
if __name__ == "__main__":
main()
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