Do sprawdzania obecności nody MATES służą specjalne funkcje. Poniżej przykłady ich użycia w C, Python i CSharp.

#include <stdio.h>
#include "mates.h"
int main(void)
{
   MATES_HANDLE h = mates_open("proxy.mon", 1);
   if (mates_discover_single_node(h, 20) == UOS_STATUS_OK)
   {
      printf("Found node #20\n");
   }
   mates_close(h);
}

import mates

with mates.Mates("proxy.mon", 1) as m:
    for node in (20, 21, 40, 41):
        if m.discover_node(node):
            print("Discovered node #{0}".format(node))
        else:
            print("Node #{0} not found".format(node))

using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.Collections.Generic;
using Viresco.Mates;
using Viresco.Mates.Registers;
using System.Threading;

namespace unit_tests
{
   [TestClass]
   public class UnitTest1
   {
      private static Mates mates;

      /// <summary>
      /// Default configuration file name.
      /// </summary>
      private const string configFile = "mates_REMOTE.mon";
      private const int channel = 1;
      private static NodeId[] allTestedNodes = new NodeId[]
      {
         NodeId.mates_diox_mk1_1,
         NodeId.mates_dio3_mk1_1
      };

      private static List<NodeId> allDio3Nodes = new List<NodeId> { };
      private static List<NodeId> allDioxNodes = new List<NodeId> { };

      [ClassInitialize]
      public static void Initialize(TestContext context)
      {
         using (mates = new Mates(configFile, channel))
         {
            foreach (Node n in mates.DiscoverNodes(allTestedNodes))
            {
               Console.WriteLine("Found node {0}", n.NodeName);

               if (n is Dio3Node)
               {
                  allDio3Nodes.Add(n.NodeId);
               }
               else if (n is DioxNode)
               {
                  allDioxNodes.Add(n.NodeId);
               }
            }
         }
      }
   }
}