added exception handling, fixes errors when waking up, or missing network

analog_system_monitor_dotnet/TrayApp.cs

@@ -3,11 +3,14 @@
 using System;
 using System.Drawing;
 using System.Windows.Forms;
+using Microsoft.Win32;
 
 public class TrayApp : ApplicationContext
 {
     private NotifyIcon trayIcon;
     private Telemetry telemetry;
+    private System.Windows.Forms.Timer timer;
+    private bool telemetryPaused = false;
 
     public TrayApp()
     {
@@ -25,10 +28,41 @@ public class TrayApp : ApplicationContext
         menu.Items.Add("Exit", null, OnExit);
         trayIcon.ContextMenuStrip = menu;
 
-        var timer = new System.Windows.Forms.Timer();
+        // Main telemetry timer
+        timer = new System.Windows.Forms.Timer();
         timer.Interval = 1000;
-        timer.Tick += (s, e) => telemetry.UpdateAndSend();
+        timer.Tick += (s, e) =>
+        {
+            if (!telemetryPaused)
+                telemetry.UpdateAndSend();
+        };
         timer.Start();
+
+        // Detect system sleep/wake
+        SystemEvents.PowerModeChanged += OnPowerModeChanged;
+    }
+
+    private void OnPowerModeChanged(object? sender, PowerModeChangedEventArgs e)
+    {
+        if (e.Mode == PowerModes.Suspend)
+        {
+            telemetryPaused = true;
+        }
+        else if (e.Mode == PowerModes.Resume)
+        {
+            telemetryPaused = true;
+
+            // Give Windows time to restore networking
+            var resumeTimer = new System.Windows.Forms.Timer();
+            resumeTimer.Interval = 3000; // 3 seconds
+            resumeTimer.Tick += (s, ev) =>
+            {
+                telemetryPaused = false;
+                resumeTimer.Stop();
+                resumeTimer.Dispose();
+            };
+            resumeTimer.Start();
+        }
     }
 
     private void OnExit(object? sender, EventArgs e)