text: #!/usr/bin/env python3
  #
  # Copyright (c) 2019 Andreas Oberritter
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  # THE SOFTWARE.
  #
  
  import logging
  from struct import pack
  from sys import argv, exit
  
  from comfoair.sync import ComfoAir
  
  logging.basicConfig(level=logging.DEBUG)
  logger = logging.getLogger(__name__)
  
  
  def main(url, level):
      logger.info('Connecting...')
      ca = ComfoAir(url)
      ca.connect()
  
      if not ca.transceive(0x9b, b'\x03', reply=0x9c, expect=b'\x03'):
          print('Failed to switch to PC mode!')
      elif not ca.transceive(0x99, pack('B', level)):
          print('Failed to set fan speed!')
      elif not ca.transceive(0x9b, b'\x00', reply=0x9c, expect=b'\x02'):
          print('Failed to switch to CC-Ease mode!')
      else:
          exit(0)
  
      exit(1)
  
  
  if __name__ == '__main__':
      if len(argv) != 3:
          print('usage: %s socket://127.0.0.1:51944 <level>\n' % argv[0] +
                '   or: %s /dev/ttyS0 <level>' % argv[0])
          exit(1)
  
      level = int(argv[2])
      if level >= 0 and level <= 4:
          main(argv[1], level)
  