helloworld.py
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	#!/usr/bin/python
	# -- coding: utf-8 --
	import os, sys
	# add ../../Sources to the PYTHONPATH
	sys.path.append(os.path.join("..", "..", "Sources"))

	from yocto_api import *
	from yocto_proximity import *
	from yocto_lightsensor import *



	def usage():
	scriptname = os.path.basename(sys.argv[0])
	print("Usage:")
	print(scriptname + ' <serial_number>')
	print(scriptname + ' <logical_name>')
	print(scriptname + ' any ')
	sys.exit()


	def die(msg):
	sys.exit(msg + ' (check USB cable)')


	errmsg = YRefParam()

	if len(sys.argv) < 2:
	usage()

	target = sys.argv[1]

	# Setup the API to use local USB devices
	if YAPI.RegisterHub("usb", errmsg) != YAPI.SUCCESS:
	sys.exit("init error" + errmsg.value)

	if target == 'any':
	# retreive any Light sensor
	p = YProximity.FirstProximity()
	if p is None:
	die('No module connected')
	target = p.get_module().get_serialNumber()

	else:
	p = YProximity.FindProximity(target + '.proximity1')


	if not (p.isOnline()):
	die('device not connected')

	al = YLightSensor.FindLightSensor(target+'.lightSensor1')
	ir = YLightSensor.FindLightSensor(target+'.lightSensor2')


	while p.isOnline():
	print("proximity : " + str(int(p.get_currentValue())) )
	print("ambient : " + str(int(al.get_currentValue())) )
	print("IR : " + str(int(ir.get_currentValue())) )

	YAPI.Sleep(1000)
	YAPI.FreeAPI()