#!usr/bin/env python
  
  import serial
  from lxml import etree
  
  xml = etree.parse('111-1.xml')
  
  ser = serial.Serial("/dev/ttyACM0", 9600, timeout=1)
  value = ser.readline()
  
  for parametre in xml.getchildren():
      if 'name' in parametre.attrib and parametre.attrib['name'] == 'data':
          parametre.text = value
  with open('111-1.xml', 'w') as myFile:
      myFile.write(etree.tounicode(xml))

  myFile.close()