update

hash_sender.py

@@ -38,7 +38,6 @@ async def create_node_hierarchy(client, node_objects):
 async def get_send_hash(ENDPOINT,NAMESPACE,server_hash_udp_ip,server_hash_udp_port):
     global nm_no
     serverAddressPort = (server_hash_udp_ip, server_hash_udp_port)
-    bufferSize = 1024
     UDPClientSocket = socket.socket(family=socket.AF_INET, type=socket.SOCK_DGRAM)
     async with Client(url=ENDPOINT) as client:
         nm_no=await client.get_namespace_index(NAMESPACE)

opcua-transmitter.py

@@ -60,6 +60,7 @@ async def get_nodes(client,node_objects):
 
 async def main() -> None:
     global nm_no
+    try:
         async with Client(url=ENDPOINT) as client:
             nm_no = str(await client.get_namespace_index(NAMESPACE))
             object_root_node = client.get_objects_node()
@@ -73,6 +74,8 @@ async def main() -> None:
             while True:
                 await handler.process()
                 await asyncio.sleep(0.01)
+    except:
+        print("No connection found for opcua server, check if the server is active")
 
 if __name__ == '__main__':
     asyncio.run(main())