diff --git a/opcua_connector.py b/opcua_connector.py
index 347a486..f074da7 100644
--- a/opcua_connector.py
+++ b/opcua_connector.py
@@ -20,7 +20,7 @@ class opcua_connector:
         self.varlist_dict = self.read_varlist(config['data']["cfg_varlist"])
         self.opcuaclient.session_timeout = 60000
 
-        make_cert()
+        #make_cert()
         
 
     def connect(self):
@@ -28,7 +28,7 @@ class opcua_connector:
         connect to the robot
         '''
         try:        
-            self.opcuaclient.set_security_string("Basic256Sha256,SignAndEncrypt,.cert/cert.der,.cert/key.pem")
+            #self.opcuaclient.set_security_string("Basic256Sha256,SignAndEncrypt,.cert/cert.der,.cert/key.pem")
             self.opcuaclient.connect()
         except Exception as e:
             raise e
@@ -77,15 +77,15 @@ class opcua_connector:
         object_node = self.opcuaclient.get_node("ns=2;s=/Methods")
         object_node.call_method(method_node, self.config['cred']["robot"]["username"], access_rights)
 
-    def _get_opcua_data(self, var_list):
-        """ Retrieve OPC UA node values based on the list of variable nodes. """
-        return [self.opcuaclient.get_node(var).get_value() for var in var_list]
+def _get_opcua_data(self, var_list):
+    """ Retrieve OPC UA node values based on the list of variable nodes. """
+    return [self.opcuaclient.get_node(var).get_value() for var in var_list]
 
 
-    def _sent_opcua_data_impuls(self, var):
-        node = self.opcuaclient.get_node(var)
-        node.set_value(1)  # Set node to 1
-        # time.sleep(1)  # Wait for 1 second
-        # node.set_value(0)  # Set node back to 0
-    
+def _sent_opcua_data_impuls(self, var):
+    node = self.opcuaclient.get_node(var)
+    node.set_value(1)  # Set node to 1
+    # time.sleep(1)  # Wait for 1 second
+    # node.set_value(0)  # Set node back to 0
+