update

asyncua_server.py

@@ -16,6 +16,16 @@ class asyncua_server():
         self.server=None
         self.idx=None
 
+    async def delete_all_objects(self):
+        root_nodes=await self.server.get_root_node().get_children()
+        obj_nodes=await root_nodes[0].get_children()
+        for node in obj_nodes:
+            if("ns=" in str(node)):
+                sub_obj = await self.server.get_node(node).get_children()
+                for del_node in sub_obj:
+                    await self.server.delete_nodes([del_node])
+                await self.server.delete_nodes([node])
+
     async def add_object(self,obj,hierarchy):
         if(hierarchy[obj]["name"]=="String"):
             var_obj= await self.server.nodes.objects.add_folder(self.idx,obj )
@@ -31,7 +41,7 @@ class asyncua_server():
             await self.server.nodes.objects.add_folder(self.idx, obj)
 
     async def add_variable(self,obj,var):
-        var= await obj.add_variable(self.idx,var, 11)
+        var = await obj.add_variable(self.idx,var, 11)
         await var.set_writable()
         return var
 
@@ -42,13 +52,12 @@ class asyncua_server():
         # set endpoint information
         url = url
         self.server.set_endpoint(url)
+        root_nodes = await self.server.get_root_node().get_children()
+        obj_nodes = await root_nodes[0].get_children()
         # create a new address space
         uri = uri
         self.idx = await self.server.register_namespace(uri)
         await self.server.start()
-        obj = await self.server.nodes.objects.add_folder(self.idx,"myobj" )
-        var = await obj.add_variable(self.idx,"myvar",0)
-        await var.set_writable()
         try:
             # keep the server running until interrupted
             while True:
@@ -67,7 +76,8 @@ def hash_receive():
         bytesAddressPair = UDPServerSocket.recvfrom(bufferSize)
         message = bytesAddressPair[0]
         hierarchy=pickle.loads(message)
-        if(prev_hash!=hierarchy["hash"]):
+        if(prev_hash!=hierarchy["hash"] and asr.idx):
+            asyncio.run(asr.delete_all_objects())
             for object in hierarchy:
                 if(object!="hash"):
                     display_name=object

opcua_receiver.py

@@ -26,8 +26,7 @@ UDPServerSocket.bind((localIP, localPort))
 print("UDP server up and listening")
 t1=threading.Thread(target=st,args=())
 t1.start()
-sleep(30)
-print("here")
+sleep(5)
 opua=opcua_pack()
 sock = opua.connect("opc.tcp://2.2.2.5:53531/myopc/free")
 
@@ -35,6 +34,4 @@ while (True):
     bytesAddressPair = UDPServerSocket.recvfrom(bufferSize)
     message = bytesAddressPair[0]
     datatype,value,ns,nodeid = message.decode().split("&")
-    if("int" in datatype):
-        print(value)
     opua.write_opcua_value(sock,ns,nodeid, value,datatype)
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