old_contents: """
  Reference:
  Ultrasonic Distance Measurement Using Python – Part 2
  http://www.raspberrypi-spy.co.uk/2013/01/ultrasonic-distance-measurement-using-python-part-2/
      
  """
  
  from socket import *
  import time
  import RPi.GPIO as GPIO
  
  
  GPIO.setwarnings(False)
  
  # create a socket and bind socket to the host
  client_socket = socket(AF_INET, SOCK_STREAM)
  client_socket.connect(('192.168.1.100', 8002))
  
  def measure():
      """
      measure distance
      """
    GPIO.output(GPIO_TRIGGER, True)
    time.sleep(0.00001)
    GPIO.output(GPIO_TRIGGER, False)
    start = time.time()
  
    while GPIO.input(GPIO_ECHO)==0:
      start = time.time()
  
    while GPIO.input(GPIO_ECHO)==1:
      stop = time.time()
  
    elapsed = stop-start
    distance = (elapsed * 34300)/2
  
    return distance
  
  # referring to the pins by GPIO numbers
  GPIO.setmode(GPIO.BCM)
  
  # define pi GPIO
  GPIO_TRIGGER = 23
  GPIO_ECHO    = 24
  
  # output pin: Trigger
  GPIO.setup(GPIO_TRIGGER,GPIO.OUT)
  # input pin: Echo
  GPIO.setup(GPIO_ECHO,GPIO.IN)
  # initialize trigger pin to low
  GPIO.output(GPIO_TRIGGER, False)
  
  try:
      while True:
          distance = measure()
          print "Distance : %.1f cm" % distance
          # send data to the host every 0.5 sec
          client_socket.send(str(distance))
          time.sleep(0.5)
  finally:
      client_socket.close()
      GPIO.cleanup()
  
new_contents: """
  Reference:
  Ultrasonic Distance Measurement Using Python – Part 2
  http://www.raspberrypi-spy.co.uk/2013/01/ultrasonic-distance-measurement-using-python-part-2/
      
  """
  
  from socket import *
  import time
  import RPi.GPIO as GPIO
  
  
  GPIO.setwarnings(False)
  
  # create a socket and bind socket to the host
  client_socket = socket(AF_INET, SOCK_STREAM)
  client_socket.connect(('192.168.1.100', 8002))
  
  def measure():
      """
      measure distance
      """
      GPIO.output(GPIO_TRIGGER, True)
      time.sleep(0.00001)
      GPIO.output(GPIO_TRIGGER, False)
      start = time.time()
  
      while GPIO.input(GPIO_ECHO)==0:
          start = time.time()
  
      while GPIO.input(GPIO_ECHO)==1:
          stop = time.time()
  
      elapsed = stop-start
      distance = (elapsed * 34300)/2
  
      return distance
  
  # referring to the pins by GPIO numbers
  GPIO.setmode(GPIO.BCM)
  
  # define pi GPIO
  GPIO_TRIGGER = 23
  GPIO_ECHO    = 24
  
  # output pin: Trigger
  GPIO.setup(GPIO_TRIGGER,GPIO.OUT)
  # input pin: Echo
  GPIO.setup(GPIO_ECHO,GPIO.IN)
  # initialize trigger pin to low
  GPIO.output(GPIO_TRIGGER, False)
  
  try:
      while True:
          distance = measure()
          print "Distance : %.1f cm" % distance
          # send data to the host every 0.5 sec
          client_socket.send(str(distance))
          time.sleep(0.5)
  finally:
      client_socket.close()
      GPIO.cleanup()
  
subject: Update ultrasonic_client.py