diff --git a/myClient b/myClient
new file mode 100755
index 0000000..c52acb4
Binary files /dev/null and b/myClient differ
diff --git a/myClient.c b/myClient.c
index 0ea2cdf..b16d5d2 100644
--- a/myClient.c
+++ b/myClient.c
@@ -1,64 +1,135 @@
 #include <string.h>
 #include "UA_PLC.h"
 
-UA_Client *client;
+// UA_Client *client;
 
-u32 Connect(long *ConnectionHdl){
-	UA_Client *c = UA_Client_new();
-	UA_StatusCode flag = UA_ClientConfig_setDefault(UA_Client_getConfig(c));
-	UA_ClientConfig *config=UA_Client_getConfig(c);
-	if (flag == UA_STATUSCODE_GOOD) {
-		flag=UA_Client_connect(c, "opc.tcp://localhost:4840");
+// u32 Connect(long *ConnectionHdl){
+// 	UA_Client *c = UA_Client_new();
+// 	UA_StatusCode flag = UA_ClientConfig_setDefault(UA_Client_getConfig(c));
+// 	UA_ClientConfig *config=UA_Client_getConfig(c);
+// 	if (flag == UA_STATUSCODE_GOOD) {
+// 		flag=UA_Client_connect(c, "opc.tcp://localhost:4840");
 
-	}else
-	{
-		UA_Client_delete(c);
-		//memset(c,0,100);
-		return flag;
-	}
-	client = c;
-	*ConnectionHdl = (long *)c;
-	printf("ConnectionHdl %lld \n",*ConnectionHdl);
-	return flag;
-}
+// 	}else
+// 	{
+// 		UA_Client_delete(c);
+// 		//memset(c,0,100);
+// 		return flag;
+// 	}
+// 	client = c;
+// 	*ConnectionHdl = (long *)c;
+// 	printf("ConnectionHdl %lld \n",*ConnectionHdl);
+// 	return flag;
+// }
 
-u32 NamespaceGetIndexList(long ConnectionHdl,u16 NamespaceUrisCount,STRING *NamespaceUris,u16 *NamespaceIndexes){
-	UA_Client *c = (UA_Client*)ConnectionHdl;
+u32 UA_NodeGetHandleList(long ConnectionHdl,u16 NodeIDCount,UANodeID *NodeIDs,long *NodeHdls,u32 ErrorIDs[]){
 	int i;
 	u32 retval=0;
-	if(NamespaceUrisCount>MAX_ELEMENTS_NAMESPACES){
+	UA_NodeId *NodeID=malloc(sizeof(UA_NodeId)*NodeIDCount);
+	if(NodeIDCount>MAX_ELEMENTS_NODELIST){
 		retval=0xA0000002;
 		return retval;
 	}
-	for(i=0;i<NamespaceUrisCount;i++){
-		UA_String NamespaceUri;
-		NamespaceUri.length = NamespaceUris[i].length;
-		NamespaceUri.data = NamespaceUris[i].data;
-		retval=UA_Client_NamespaceGetIndex(c,&NamespaceUri,&NamespaceIndexes[i]);
-		if (retval!= UA_STATUSCODE_GOOD) {
-            printf("Failed to get namespace index for URI %.*s\n", (int)NamespaceUri.length, NamespaceUri.data);
-            break; // 出现错误时立即退出循环
-        }
+
+	for(i=0;i<NodeIDCount;i++){
+        printf("\nNdeIDs[i].IdentifierType=%d,NodeIDs[i].NamespaceIndex=%d,NodeIDs[i].Identifier.length=%d, NodeIDs[i].Identifier.data=%s\n",
+            NodeIDs[i].IdentifierType,   NodeIDs[i].NamespaceIndex,  NodeIDs[i].Identifier.length ,NodeIDs[i].Identifier.data );
+
+		if(NodeIDs[i].IdentifierType>=0&&NodeIDs[i].IdentifierType<4){
+			switch(NodeIDs[i].IdentifierType){
+				case 0:NodeID[i]=UA_NODEID_NUMERIC(NodeIDs[i].NamespaceIndex,NodeIDs[i].Identifier.data);break;
+				case 1:NodeID[i]=UA_NODEID_STRING(NodeIDs[i].NamespaceIndex,NodeIDs[i].Identifier.data);break;
+				case 2:NodeID[i].identifierType=4;
+						NodeID[i].identifier.string.data=NodeIDs[i].Identifier.data;
+						NodeID[i].identifier.string.length=NodeIDs[i].Identifier.length;
+						NodeID[i].namespaceIndex=NodeIDs[i].NamespaceIndex;break;
+				case 3:NodeID[i]=UA_NODEID_BYTESTRING(NodeIDs[i].NamespaceIndex,NodeIDs[i].Identifier.data);break;
+			}
+			ErrorIDs[i]=0;
+		}else{
+			ErrorIDs[i]=0xA0000301;
+			retval=ErrorIDs[i];
+		}
+		// NodeID[i].identifier.string.data=NodeIDs[i].Identifier.data;
+		// NodeID[i].identifier.string.length=NodeIDs[i].Identifier.length;
+		// NodeID[i].namespaceIndex=NodeIDs[i].NamespaceIndex;
+		NodeHdls[i]=&NodeID[i];
+		//UA_NodeId *NodeID1=malloc(sizeof(UA_NodeId)*NodeIDCount);
+		//UA_NodeId_delete(&NodeID[i]);
 	}
+
 	return retval;
+
+}
+
+void Browser(){
+	
 }
 
 int main(int argc, char *argv[]) {
 	
-    long connectionHdl;
-	Connect(&connectionHdl);
-	STRING str[3];
-	str[0].data = (UA_Byte*)"http://opcfoundation.org/UA/";
-	str[0].length = 28;
-	str[1].data = (UA_Byte*)"urn:open62541.server.application";
-	str[1].length = 32;
-	str[2].data = (UA_Byte*)"http://example.com/MyNamespace";
-	str[2].length = 30;
-	u16 num[3] = {0};
-	NamespaceGetIndexList(connectionHdl,3,str,num);
-	printf("Namespace Indexes:\n");
-    for (int i = 0; i < 3; i++) {
-        printf("URI %d: Index = %u\n", i, num[i]);
+    // long connecthdl;
+	// Connect(&connecthdl);
+	UA_Client *client = UA_Client_new();
+    UA_ClientConfig_setDefault(UA_Client_getConfig(client));
+    UA_StatusCode retval = UA_Client_connect(client, "opc.tcp://localhost:4840");
+    if(retval != UA_STATUSCODE_GOOD) {
+        UA_Client_delete(client);
+        return (int)retval;
     }
+	long *connecthdl = (long*)client;
+	UANodeID nodes[4];
+	long nodeHdls[4] = {0};
+	u32 errors[4];
+	printf("Browsing nodes in objects folder:\n");
+    UA_BrowseRequest bReq;
+    UA_BrowseRequest_init(&bReq);
+    bReq.requestedMaxReferencesPerNode = 0;
+    bReq.nodesToBrowse = UA_BrowseDescription_new();
+    bReq.nodesToBrowseSize = 1;
+    bReq.nodesToBrowse[0].nodeId = UA_NODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER); /* browse objects folder */
+    bReq.nodesToBrowse[0].resultMask = UA_BROWSERESULTMASK_ALL; /* return everything */
+    UA_BrowseResponse bResp = UA_Client_Service_browse(client, bReq);
+	printf("\n\n 0x%08x \n\n",bResp.responseHeader.serviceResult);
+    printf("%-9s %-16s %-16s %-16s\n", "NAMESPACE", "NODEID", "BROWSE NAME", "DISPLAY NAME");
+    for(size_t i = 0; i < bResp.resultsSize; ++i) {
+        for(size_t j = 0; j < bResp.results[i].referencesSize; ++j) {
+            UA_ReferenceDescription *ref = &(bResp.results[i].references[j]);
+            if(ref->nodeId.nodeId.identifierType == UA_NODEIDTYPE_NUMERIC) {
+                printf("%-9u %-16u %-16.*s %-16.*s\n", ref->nodeId.nodeId.namespaceIndex,
+                       ref->nodeId.nodeId.identifier.numeric, (int)ref->browseName.name.length,
+                       ref->browseName.name.data, (int)ref->displayName.text.length,
+                       ref->displayName.text.data);
+            } else if(ref->nodeId.nodeId.identifierType == UA_NODEIDTYPE_STRING) {
+                printf("%-9u %-16.*s %-16.*s %-16.*s\n", ref->nodeId.nodeId.namespaceIndex,
+                       (int)ref->nodeId.nodeId.identifier.string.length,
+                       ref->nodeId.nodeId.identifier.string.data,
+                       (int)ref->browseName.name.length, ref->browseName.name.data,
+                       (int)ref->displayName.text.length, ref->displayName.text.data);
+            }
+
+			printf("%lld",ref->nodeId.nodeId.identifier.numeric);
+
+			nodes[j].Identifier.length = ref->nodeId.nodeId.identifier.string.length;
+			if(nodes[j].Identifier.length > 0) {
+    			nodes[j].Identifier.data = (u8*)malloc(nodes[j].Identifier.length);
+				snprintf(nodes[j].Identifier.data, nodes[j].Identifier.length, "%lld", (long long)ref->nodeId.nodeId.identifier.numeric);
+    			
+			}
+			nodes[j].IdentifierType = ref->nodeId.nodeId.identifierType;
+			nodes[j].NamespaceIndex = ref->nodeId.nodeId.namespaceIndex;
+            /* TODO: distinguish further types */
+        }
+    }
+    UA_BrowseRequest_clear(&bReq);
+    UA_BrowseResponse_clear(&bResp);
+
+	UA_NodeGetHandleList(*connecthdl,4,nodes,nodeHdls,errors);
+
+	printf("%d\n",nodeHdls[0]);
+    /* Clean up */
+    UA_Client_disconnect(client);
+    UA_Client_delete(client);
+	
 	
 }
\ No newline at end of file
diff --git a/opcua_server b/myServer
similarity index 88%
rename from opcua_server
rename to myServer
index e70f4c4..e52624d 100755
Binary files a/opcua_server and b/myServer differ
diff --git a/opcua_client b/opcua_client
deleted file mode 100755
index b348645..0000000
Binary files a/opcua_client and /dev/null differ