diff --git a/cbpi/__init__.py b/cbpi/__init__.py
index 8a5d341..490799a 100644
--- a/cbpi/__init__.py
+++ b/cbpi/__init__.py
@@ -1,3 +1,3 @@
-__version__ = "4.0.7.a5"
+__version__ = "4.0.7.a6"
 __codename__ = "Spring Break"
 
diff --git a/cbpi/controller/sensor_controller.py b/cbpi/controller/sensor_controller.py
index 6c70c87..ae8278f 100644
--- a/cbpi/controller/sensor_controller.py
+++ b/cbpi/controller/sensor_controller.py
@@ -19,6 +19,8 @@ class SensorController(BasicController):
         return dict(name=data.get("name"), id=data.get("id"), type=data.get("type"), state=state,props=data.get("props", []))
     
     def get_sensor_value(self, id):
+        if id is None:
+            return None
         try:
             return self.find_by_id(id).instance.get_state()
         except Exception as e: