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datalogger.py 6.97 KB
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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()