diff --git a/server/web-data-connection/sensorNodeClass.py b/server/web-data-connection/sensorNodeClass.py
index c3cb90d..0e22bb9 100644
--- a/server/web-data-connection/sensorNodeClass.py
+++ b/server/web-data-connection/sensorNodeClass.py
@@ -5,7 +5,7 @@ from classes_data import Node
 from classes_data import dbLogin
 
 class SensorNode(Node):
-    query = "INSERT INTO `Measurement` (NodeID, Type, Value) VALUES (%s, %s, %s)"
+    __query = "INSERT INTO `Measurement` (NodeID, Type, Value) VALUES (%s, %s, %s)"
 
     def __init__(self, macAdress, temp, humi, eCO2, TVOC):
         super().__init__(macAdress)
@@ -30,7 +30,7 @@ class SensorNode(Node):
 
             pushingDataArray = [(nodeID, "Temp", SensorNode.temperature), (nodeID, "Humi", SensorNode.humidity), (nodeID, "eCO2", SensorNode.eCO2), (nodeID, "TVOC", SensorNode.TVOC)]
             for i in pushingDataArray:
-                cursor.execute(SensorNode.query, i)
+                cursor.execute(SensorNode.__query, i)
                 mydb.commit()
         
                 
diff --git a/server/web-data-connection/umlpython.png b/server/web-data-connection/umlpython.png
new file mode 100644
index 0000000..721adca
Binary files /dev/null and b/server/web-data-connection/umlpython.png differ