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_altitude import *
	from yocto_temperature import *
	from yocto_pressure 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 altitude sensor
	sensor = YAltitude.FirstAltitude()
	if sensor is None:
	die('No module connected')
	m = sensor.get_module()
	target = m.get_serialNumber()

	else:
	m = YModule.FindModule(target)

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

	altSensor = YAltitude.FindAltitude(target + '.altitude')
	pressSensor = YPressure.FindPressure(target + '.pressure')
	tempSensor = YTemperature.FindTemperature(target + '.temperature')

	while altSensor.isOnline():
	print("%4.1f" % altSensor.get_currentValue() + "m (QNH=" \
	+ "%4.1f" % altSensor.get_qnh() + "hPa) " \
	+ "%4.1f" % pressSensor.get_currentValue() + "hPa " \
	+ "%2.0f" % tempSensor.get_currentValue() + "deg C " \
	+ "(Ctrl-c to stop) ")
	YAPI.Sleep(1000)
	YAPI.FreeAPI()