diff --git a/Logger.py b/Logger.py
new file mode 100644
index 0000000..309bcbe
--- /dev/null
+++ b/Logger.py
@@ -0,0 +1,106 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import time
+import sys
+import traceback
+from timeFunctions import *
+import xml.etree.ElementTree as ET
+
+class Logger(object):
+	def __init__(self,names, temperature_config, log, records):
+		self.names = names
+		self.temp_sensors = temperature_config[0]
+		self.prev_temps =[]
+		for i in range(self.temp_sensors):
+			self.prev_temps.append(temperature_config[1])
+		self.temp_max_diff = temperature_config[2]
+		self.log = log
+		self.records = records
+	
+	def temp_rise(self,old,new,sensor):
+		if(old==20000):
+			return True
+		if((old-new)>self.temp_max_diff or (new-old)>self.temp_max_diff):
+			self.log.write('error checking temp '+sensor+';prev('+str(old)+');cur('+str(new)+'); ... @'+time.ctime()+"\n")
+			self.log.flush()
+			return False
+		else:
+			return True
+	
+	##########################################
+	# common function to write value to file #
+	##########################################
+	def write_value(self,value,sensor):
+		valuename=self.records+"/"+self.names[sensor]+"_"+preptime()
+		valuelog=open(valuename,'a')
+		valuelog.write(str(value) + ';' + str(int(time.time())) +"\n")
+		valuelog.close()
+
+	#########################################
+	# generic checking of temperature		#
+	#########################################
+	def check_and_write_temperature(self,value,sensor):
+		if(sensor>=self.temp_sensors):
+			return
+		if(self.temp_rise(self.prev_temps[sensor],value,str(sensor+1))):
+			self.write_value(value,sensor)
+			self.prev_temps[sensor]=value
+
+	##########################################
+	# callbacks for temp1+2					 #
+	##########################################
+	def cb_temperature0(self,value):
+		sensor=0
+		self.check_and_write_temperature(value,sensor)
+		print(self.names[sensor] +': ' + str(value/100.0) + ' °C,' + str(time.ctime()))
+	#
+	def cb_temperature1(self,value):
+		sensor=1
+		self.check_and_write_temperature(value,sensor)
+		print(self.names[sensor] +': ' + str(value/100.0) + ' °C,' + str(time.ctime()))
+	
+	###########################################
+	# callback for humidity1				  #
+	###########################################
+	def cb_humidity2(self,rh):
+		sensor=2
+		self.write_value(rh,sensor)
+		print(self.names[sensor] +': '+ str(rh/10.0) + ' %RH,' + str(time.ctime()))
+	
+	###########################################
+	# callback for ambi-light1+2		  	  #
+	###########################################
+	def cb_illuminance3(self,illuminance):
+		sensor=3
+		self.write_value(illuminance,sensor)
+		print(self.names[sensor] +': '+ str(illuminance/10.0) + ' Lux,' + str(time.ctime()))
+	#
+	def cb_illuminance4(self,illuminance):
+		sensor=4
+		self.write_value(illuminance,sensor)
+		print(self.names[sensor] +': '+ str(illuminance/10.0) + ' Lux,' + str(time.ctime()))
+	
+	###########################################
+	# callback for barometer1		  		  #
+	###########################################
+	def cb_pressure5(self,pressure):
+		sensor=5
+		self.write_value(pressure,sensor)
+		print(self.names[sensor] +": "+str(pressure/1000)+ "mbar"+str(time.ctime()))
+	
+	###########################################
+	# exception logging						  #
+	###########################################
+	def printException(self,inst):
+		tree=ET.parse('logs/exceptions.xml')
+		root=tree.getroot()
+		new=ET.Element('exception',{'class':str(type(inst)).split("'")[1],'date':str(time.ctime()),'time':str(int(time.time())),'type':str(inst)})
+		new.text=traceback.format_exc()
+		root.append(new)
+		tree.write('logs/exceptions.xml')
+	
+		self.log.write('an Exception happen during connection @'+time.ctime()+"\n")
+		self.log.flush()
+		print('an Exception happen during connection @'+time.ctime()+"\n")
+	#end#
diff --git a/all.py b/all.py
index 4b397d1..0c39f0e 100644
--- a/all.py
+++ b/all.py
@@ -1,30 +1,20 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-  
 
-#rev2	:*barometer added (b1:#6) [not physically added!!!]
-#	 *lcd disabled
-#	 *exception-logging	[dont forget to add empty .xml!]
-#rev3	:*generic callbacks	(15.01.2013-??)
-#	 *lcd removed
-#rev4	 *V2.0
-#	 *barometer
-#
-#
-#TODO:
-#	*sensorNames=array()...
-#	*sensorUIDs=array()?
-#
-#
-#
+
+import os.path
+import os
+import time
+
+from Logger import Logger
 
 #HOST = "localhost"
 HOST = "192.168.2.30"
 PORT = 4223
 
 UID = ["7B5", "8js", "7RY", "8Fw", "8DJ", "bB7"]
-NAME = ["temp1", "temp2", "humi1", "ambi1", "ambi2", "baro1"]
+NAMES = ["temp1", "temp2", "humi1", "ambi1", "ambi2", "baro1"]
 
-tempSensors=2
 
 try:
 	from tinkerforge.ip_connection import IPConnection
@@ -36,22 +26,14 @@ except ImportError:
 	print("package 'tinkerforge' not installed, canceling")
 	raise
 
-import time
-import string
-import os.path
-import os
-import sys,traceback
-import array
-from timeFunctions import *
-
-
 cbtimetemp=30000
 cbtimehumi=30000
 cbtimeambi=60000
 cbtimebaro=60000
 
+tempSensors=2
 tempmaxdiff=200 # 200== 2.0 C
-prev_temps=[20000,20000]
+prev_temps_default=20000
 
 logs='logs'
 locks='locks'
@@ -60,88 +42,7 @@ records='records'
 lockname=locks+"/all.lock"
 log=open(logs+"/all.log",'a')
 
-def temp_rise(old,new,sensor):
-	if(old==20000):
-		return True
-	if((old-new)>tempmaxdiff or (new-old)>tempmaxdiff):
-		log.write('error checking temp '+sensor+';prev('+str(old)+');cur('+str(new)+'); ... @'+time.ctime()+"\n")
-		log.flush()
-		return False
-	else:
-		return True
-##########################################
-# common function to write value to file #
-##########################################
-def write_value(value,sensor):
-	valuename=records+"/"+NAME[sensor]+"_"+preptime()
-	valuelog=open(valuename,'a')
-	valuelog.write(str(value) + ';' + str(int(time.time())) +"\n")
-	valuelog.close()
 
-#########################################
-# generic checking of temperature		#
-#########################################
-def check_and_write_temperature(value,sensor):
-	if(sensor>=tempSensors):
-		return
-	global prev_temps
-	if(temp_rise(prev_temps[sensor],value,str(sensor+1))):
-		write_value(value,sensor)
-		prev_temps[sensor]=value
-
-##########################################
-# callbacks for temp1+2					 #
-##########################################
-def cb_temperature0(value):
-	check_and_write_temperature(value,0)
-	print(name1+': ' + str(value/100.0) + ' °C,' + str(time.ctime()))
-#
-def cb_temperature1(value):
-	check_and_write_temperature(value,1)
-	print(name2+': ' + str(value/100.0) + ' °C,' + str(time.ctime()))
-	
-###########################################
-# callback for humidity1				  #
-###########################################
-def cb_humidity2(rh):
-	write_value(rh,2)
-	print(name3 +': '+ str(rh/10.0) + ' %RH,' + str(time.ctime()))
-	
-###########################################
-# callback for ambi-light1+2		  	  #
-###########################################
-def cb_illuminance3(illuminance):
-	write_value(illuminance,3)
-	print(name4 +': '+ str(illuminance/10.0) + ' Lux,' + str(time.ctime()))
-#
-def cb_illuminance4(illuminance):
-	write_value(illuminance,4)
-	print(name5 +': '+ str(illuminance/10.0) + ' Lux,' + str(time.ctime()))
-	
-###########################################
-# callback for barometer1		  		  #
-###########################################
-def cb_pressure5(pressure):
-	write_value(pressure,5)
-	print(name6+": "+str(pressure/1000)+ "mbar"+str(time.ctime()))
-	
-###########################################
-# exception logging						  #
-###########################################
-def printException(inst):
-	global log
-	import xml.etree.ElementTree as ET
-	tree=ET.parse('logs/exceptions.xml')
-	root=tree.getroot()
-	new=ET.Element('exception',{'class':str(type(inst)).split("'")[1],'date':str(time.ctime()),'time':str(int(time.time())),'type':str(inst)})
-	new.text=traceback.format_exc()
-	root.append(new)
-	tree.write('logs/exceptions.xml')
-	
-	log.write('an Exception happen during connection @'+time.ctime()+"\n")
-	print('an Exception happen during connection @'+time.ctime()+"\n")
-	log.flush()
-#end#
 
 if __name__ == "__main__":
 	if not os.path.exists(lockname):
@@ -149,6 +50,7 @@ if __name__ == "__main__":
 		lock.write(str(time.time()))
 		lock.close()
 		# lock obtained
+		logger=Logger(NAMES, (tempSensors, prev_temps_default, tempmaxdiff), log, records)
 		try:
 			ipcon = IPConnection()
 			t0 = Temperature(UID[0], ipcon)
@@ -159,16 +61,13 @@ if __name__ == "__main__":
 			b5 = Barometer(UID[5], ipcon)
 			# connect
 			ipcon.connect(HOST, PORT)
-		except Exception as inst:
-			#connection failed, log and exit
-			printException(inst)
-		else:
-			cb_temperature0(t0.get_temperature())
-			cb_temperature1(t1.get_temperature())
-			cb_humidity2(h2.get_humidity())
-			cb_illuminance3(al3.get_illuminance())
-			cb_illuminance4(al4.get_illuminance())
-			cb_pressure5(b5.get_air_pressure())
+			# ensure all sensors are present
+			logger.cb_temperature0(t0.get_temperature())
+			logger.cb_temperature1(t1.get_temperature())
+			logger.cb_humidity2(h2.get_humidity())
+			logger.cb_illuminance3(al3.get_illuminance())
+			logger.cb_illuminance4(al4.get_illuminance())
+			logger.cb_pressure5(b5.get_air_pressure())
 			
 			t0.set_temperature_callback_period(cbtimetemp)
 			t1.set_temperature_callback_period(cbtimetemp)
@@ -180,21 +79,21 @@ if __name__ == "__main__":
 			log.write('start logging "all" ... @'+time.ctime()+"\n")
 			log.flush()
 			
-			t0.register_callback(t0.CALLBACK_TEMPERATURE, cb_temperature0)
-			t1.register_callback(t1.CALLBACK_TEMPERATURE, cb_temperature1)
-			h2.register_callback(h2.CALLBACK_HUMIDITY, cb_humidity2)
-			al3.register_callback(al3.CALLBACK_ILLUMINANCE, cb_illuminance3)
-			al4.register_callback(al4.CALLBACK_ILLUMINANCE, cb_illuminance4)
-			b5.register_callback(b5.CALLBACK_AIR_PRESSURE,cb_pressure5)
+			t0.register_callback(t0.CALLBACK_TEMPERATURE, logger.cb_temperature0)
+			t1.register_callback(t1.CALLBACK_TEMPERATURE, logger.cb_temperature1)
+			h2.register_callback(h2.CALLBACK_HUMIDITY, logger.cb_humidity2)
+			al3.register_callback(al3.CALLBACK_ILLUMINANCE, logger.cb_illuminance3)
+			al4.register_callback(al4.CALLBACK_ILLUMINANCE, logger.cb_illuminance4)
+			b5.register_callback(b5.CALLBACK_AIR_PRESSURE,logger.cb_pressure5)
 			
 			raw_input('Press key to exit\n')
 			ipcon.disconnect()
-		
 			log.write('stop logging... @'+time.ctime()+"\n")
-		
+		except Exception as inst:
+			#connection failed, log and exit
+			logger.printException(inst)
 		os.remove(lockname)
 	else:
 		print('lock file active!!')
 		log.write('lock collision: lock "all" active @ '+time.ctime()+"\n")
 
-