diff --git a/plugin.py b/plugin.py
index 6acdcf2..37becc4 100755
--- a/plugin.py
+++ b/plugin.py
@@ -34,7 +34,7 @@ import urllib.parse as parse
 import urllib.request as request
 import base64
 import time
-from datetime import datetime
+from datetime import datetime, timedelta
 
 DEFAULT_POOLING = 30 #multiple of 15 sec
 DEFAULT_DURATION = 30
@@ -129,8 +129,7 @@ class BasePlugin:
             self.planning.append((start_end[0], start_end[1]))
         if len(self.planning) != 7:
             raise Exception("Incorrect planning...")
-            
-        
+
     def onHeartbeat(self):
         if self.pooling_current_step == self.pooling_steps:
             #Now
@@ -138,8 +137,8 @@ class BasePlugin:
             weekday = datetime.today().weekday()
             
             # Get device values
-            n_in, t_in, h_in, dp_in = get_temp_devide_info(self.in_id)
-            n_out, t_out, h_out, dp_out = get_temp_devide_info(self.out_id)
+            n_in, t_in, h_in, dp_in, lu_in = get_temp_devide_info(self.in_id)
+            n_out, t_out, h_out, dp_out, lu_out = get_temp_devide_info(self.out_id)
             # Get switch values
             n_sw, s_sw = get_switch_device_info(self.switch_id)
             
@@ -150,7 +149,7 @@ class BasePlugin:
             Domoticz.Debug("Last 3 minutes of indoor humidity: " + str(self.histo_hum))
 
             if self.delay_in_progress == False and self.mode == False and s_sw == True:
-                #Some one manually swtch on the device
+                #Someone manually switched on the device
                 #We keep the time
                 self.last_time = now
                 self.delay_in_progress = True
@@ -159,7 +158,7 @@ class BasePlugin:
                 Domoticz.Debug("Start delay={}".format(now))
 
             # If % huminidy > MAX ==> ON
-            if check_rule(self.rule, t_in, h_in, dp_in, t_out, h_out, dp_out, self.histo_hum):
+            if check_rule(self.rule, t_in, h_in, dp_in, lu_in, t_out, h_out, dp_out, lu_out, self.histo_hum):
                 self.mode = True #On
                 #We also keep the time, but only if in the authorized time range
                 if is_between(time.strftime("%H:%M", time.localtime(now)), self.planning[weekday]):
@@ -212,6 +211,7 @@ def get_temp_devide_info(idx):
     res = DomoticzAPI("type=devices&rid={0}".format(idx))
     name = res['result'][0]['Name']
     temp = res['result'][0]['Temp']
+    lastUpdate = res['result'][0]['LastUpdate']
     try:
         hum = res['result'][0]['Humidity']
     except:
@@ -220,8 +220,8 @@ def get_temp_devide_info(idx):
         dewpoint = res['result'][0]['DewPoint']
     except:
         dewpoint = -100
-    Domoticz.Debug("Device #{}: {} / T={}°C / H={}% / DP={}°C".format(idx, name, temp, hum, dewpoint))
-    return name, float(temp), float(hum), float(dewpoint)
+    Domoticz.Debug("Device #{}: {} / T={}°C / H={}% / DP={}°C ({})".format(idx, name, temp, hum, dewpoint, lastUpdate))
+    return name, float(temp), float(hum), float(dewpoint), str(lastUpdate)
 
 def get_switch_device_info(idx):
     res = DomoticzAPI("type=devices&rid={0}".format(idx))
@@ -238,7 +238,10 @@ def switch_on_off(idx, mode=0):
     Domoticz.Status("Switch #{} is now '{}'.".format(idx, cmd))
     return
 
-def check_rule(exp, t_in, h_in, dp_in, t_out, h_out, dp_out, histo_hum):
+def check_rule(exp, t_in, h_in, dp_in, lu_in, t_out, h_out, dp_out, lu_out, histo_hum):
+    if lu_in<(datetime.now()-timedelta(minutes=DEFAULT_DURATION)).strftime("%Y-%m-%d %H:%M:%S"):
+        Domoticz.Status("Device In seems obsolete ({})".format(lu_in))
+        return False
     h_in_delta = float(h_in) - min(histo_hum)
     res = eval(exp)
     Domoticz.Debug("Check rule: {} ==> {}".format(exp, res))