diff --git a/cbpi/__init__.py b/cbpi/__init__.py
index ecee302..023dc6d 100644
--- a/cbpi/__init__.py
+++ b/cbpi/__init__.py
@@ -1,3 +1,3 @@
-__version__ = "4.1.0.rc3"
+__version__ = "4.1.0.rc4"
 __codename__ = "Groundhog Day"
 
diff --git a/cbpi/extension/httpsensor/__init__.py b/cbpi/extension/httpsensor/__init__.py
index 5b77b6a..7da1cdf 100644
--- a/cbpi/extension/httpsensor/__init__.py
+++ b/cbpi/extension/httpsensor/__init__.py
@@ -10,7 +10,7 @@ from cbpi.api.dataclasses import NotificationAction, NotificationType
 cache = {}
 
 @parameters([Property.Text(label="Key", configurable=True, description="Http Key"),
-             Property.Number(label="Timeout", configurable="True",unit="sec",description="Timeout in seconds to send notification (default:60)")
+             Property.Number(label="Timeout", configurable="True",unit="sec",description="Timeout in seconds to send notification (default:60 | deactivated: 0)")
 ])
 class HTTPSensor(CBPiSensor):
     def __init__(self, cbpi, id, props):
@@ -37,17 +37,19 @@ class HTTPSensor(CBPiSensor):
         In this example the code is executed every second
         '''
         while self.running is True:
-            currenttime=time.time()            
-            if currenttime > self.nextchecktime and self.notificationsend == False:   
-                await self.message()
-                self.notificationsend=True
+            if self.timeout !=0:
+                currenttime=time.time()            
+                if currenttime > self.nextchecktime and self.notificationsend == False:   
+                    await self.message()
+                    self.notificationsend=True
             try:
                 cache_value = cache.pop(self.props.get("Key"), None)
                 if cache_value is not None:
                     self.value = float(cache_value)
                     self.push_update(self.value)
-                    self.nextchecktime = currenttime + self.timeout
-                    self.notificationsend = False
+                    if self.timeout !=0:
+                        self.nextchecktime = currenttime + self.timeout
+                        self.notificationsend = False
             except Exception as e:
                 logging.error(e)
                 pass
diff --git a/cbpi/extension/mqtt_sensor/__init__.py b/cbpi/extension/mqtt_sensor/__init__.py
index e2d6e48..e121eb8 100644
--- a/cbpi/extension/mqtt_sensor/__init__.py
+++ b/cbpi/extension/mqtt_sensor/__init__.py
@@ -1,14 +1,17 @@
 # -*- coding: utf-8 -*-
 import asyncio
-
+from cbpi.api.dataclasses import NotificationAction, NotificationType
 from cbpi.api import parameters, Property, CBPiSensor
 from cbpi.api import *
 import logging
 import json
+import time
 
 @parameters([Property.Text(label="Topic", configurable=True, description="MQTT Topic"),
              Property.Text(label="PayloadDictionary", configurable=True, default_value="",
-                           description="Where to find msg in payload, leave blank for raw payload")])
+                           description="Where to find msg in payload, leave blank for raw payload"),
+             Property.Number(label="Timeout", configurable="True",unit="sec",
+                            description="Timeout in seconds to send notification (default:60 | deactivated: 0)")])
 class MQTTSensor(CBPiSensor):
 
     def __init__(self, cbpi, id, props):
@@ -19,6 +22,19 @@ class MQTTSensor(CBPiSensor):
             self.payload_text = self.payload_text.split('.')
         self.mqtt_task = self.cbpi.satellite.subcribe(self.Topic, self.on_message)
         self.value: float = 999
+        self.timeout=int(self.props.get("Timeout", 60))
+        self.starttime = time.time()
+        self.notificationsend = False
+        self.nextchecktime=self.starttime+self.timeout
+
+    async def Confirm(self, **kwargs):
+        self.nextchecktime = time.time() + self.timeout
+        self.notificationsend = False
+        pass
+
+    async def message(self):
+        self.cbpi.notify("MQTTSensor Timeout", "Sensor " + str(self.Topic) + " did not respond", NotificationType.WARNING, action=[NotificationAction("OK", self.Confirm)])
+        pass
 
     async def on_message(self, message):
         val = json.loads(message)
@@ -31,11 +47,18 @@ class MQTTSensor(CBPiSensor):
                 self.value = float(val)
                 self.log_data(self.value)
                 self.push_update(self.value)
+                if self.timeout !=0:
+                    self.nextchecktime = time.time() + self.timeout
+                    self.notificationsend = False
         except Exception as e:
             logging.info("MQTT Sensor Error {}".format(e))
 
     async def run(self):
         while self.running:
+            if self.timeout !=0:         
+                if time.time() > self.nextchecktime and self.notificationsend == False:   
+                    await self.message()
+                    self.notificationsend=True
             await asyncio.sleep(1)
 
     def get_state(self):