new_contents: #!/usr/bin/env python2
  
  # use /usr/bin/env python to run it on ubuntu
  # taken from the official doc pdf
  
  # import the various server implementations
  from pymodbus.server.async import StartTcpServer
  from pymodbus.server.async import StartUdpServer
  from pymodbus.server.async import StartSerialServer
  from pymodbus.datastore import ModbusSequentialDataBlock
  from pymodbus.datastore import ModbusSlaveContext, ModbusServerContext
  
  # configure the service logging
  import logging
  logging.basicConfig()
  log = logging.getLogger()
  log.setLevel(logging.DEBUG)
  
  # initialize your data store
  store = ModbusSlaveContext(
      di=ModbusSequentialDataBlock(0, [17] * 100),
      co=ModbusSequentialDataBlock(0, [17] * 100),
      hr=ModbusSequentialDataBlock(0, [17] * 100),
      ir=ModbusSequentialDataBlock(0, [17] * 100))
  context = ModbusServerContext(slaves=store, single=True)
  
  # run the server you want
  StartTcpServer(context)
  # StartUdpServer(context)
  # StartSerialServer(context, port='/tmp/tty1')
  
subject: Add pymodbus async-server.py