update present count event args, to receive actual present count from mqttclient

ADIS_Csharp/RobotLib/Status/DevStatus.cs

@@ -23,8 +23,14 @@ namespace RobotLib.Status {
                 StatusEventArgs eventArgs = new(message);
                 StatusChanged?.Invoke(this, eventArgs);
             }else if(fromTopic == TOPIC_STATUS_PRESENT) {
-                PresentEventArgs presentEventArgs = new(true);
-                PresentChanged?.Invoke(this, presentEventArgs);
+                Int16 presentCnt = 0;
+                if (Int16.TryParse(message, out presentCnt)) {
+                    PresentEventArgs presentEventArgs = new(presentCnt);
+                    PresentChanged?.Invoke(this, presentEventArgs);
+                } else {
+                    log.Error($"Invalid payload received {message}");
+                }
+                
             }
         }
 

ADIS_Csharp/RobotLib/Status/PresentEventArgs.cs

@@ -6,10 +6,11 @@ using System.Threading.Tasks;
 
 namespace RobotLib.Status {
     public class PresentEventArgs {
-        public bool Present { get; }
+        public int Present { get; }
+
+        public PresentEventArgs(int presentCount) {
+            Present = presentCount;
            
-        public PresentEventArgs(bool present) {
-            Present = present;
         }
     }
 }