old_contents: #!/usr/bin/env python
  
  # Software License Agreement (BSD License)
  #
  # Copyright (c) 2011, Willow Garage, Inc.
  # All rights reserved.
  #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions
  # are met:
  #
  #  * Redistributions of source code must retain the above copyright
  #    notice, this list of conditions and the following disclaimer.
  #  * Redistributions in binary form must reproduce the above
  #    copyright notice, this list of conditions and the following
  #    disclaimer in the documentation and/or other materials provided
  #    with the distribution.
  #  * Neither the name of Willow Garage, Inc. nor the names of its
  #    contributors may be used to endorse or promote products derived
  #    from this software without specific prior written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  # COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  # POSSIBILITY OF SUCH DAMAGE.
  
  __author__ = "mferguson@willowgarage.com (Michael Ferguson)"
  
  import roslib; roslib.load_manifest("rosserial_python")
  import rospy
  from rosserial_python import SerialClient
  
  import sys
  
  if __name__=="__main__":
      rospy.init_node("serial_node")
      rospy.loginfo("ROS Serial Python Node")
      
      port_name = '/dev/ttyUSB0'
      if len(sys.argv) == 2 :
          port_name  = sys.argv[1]
      rospy.loginfo("Connected on %s" % port_name)
      client = SerialClient(port_name)
      try:
          client.run()
      except KeyboardInterrupt:
          pass
  
  
new_contents: #!/usr/bin/env python
  
  # Software License Agreement (BSD License)
  #
  # Copyright (c) 2011, Willow Garage, Inc.
  # All rights reserved.
  #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions
  # are met:
  #
  #  * Redistributions of source code must retain the above copyright
  #    notice, this list of conditions and the following disclaimer.
  #  * Redistributions in binary form must reproduce the above
  #    copyright notice, this list of conditions and the following
  #    disclaimer in the documentation and/or other materials provided
  #    with the distribution.
  #  * Neither the name of Willow Garage, Inc. nor the names of its
  #    contributors may be used to endorse or promote products derived
  #    from this software without specific prior written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  # COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  # POSSIBILITY OF SUCH DAMAGE.
  
  __author__ = "mferguson@willowgarage.com (Michael Ferguson)"
  
  import roslib; roslib.load_manifest("rosserial_python")
  import rospy
  from rosserial_python import SerialClient
  
  import sys
  
  if __name__=="__main__":
      rospy.init_node("serial_node")
      rospy.loginfo("ROS Serial Python Node")
      
      port_name = rospy.get_param('~port','/dev/ttyUSB0')
      baud = int(rospy.get_param('~baud','57600'))
      if len(sys.argv) == 2 :
          port_name  = sys.argv[1]
      rospy.loginfo("Connected on %s" % port_name)
      client = SerialClient(port_name, baud)
      try:
          client.run()
      except KeyboardInterrupt:
          pass
  
  
subject: add port and baud parameters to python node