Обновление статуса переехало в отдельный класс, в реакции на сообщение только известный набор статусов возвращаем

Problems/Item.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace ZaoBot.Problems
+{
+	public enum Status
+	{
+		UNKNOWN,
+		OK,
+		PROBLEM
+	}
+
+	class Item
+	{
+		public string label;
+		public string name;
+		public Status status;
+	}
+}

Problems/StatusManager.cs

@@ -0,0 +1,66 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Timers;
+
+namespace ZaoBot.Problems
+{
+	class StatusManager
+	{
+		const int DEFAULT_INTERVAL = 2000;
+
+		private OpenHab.OpenHabClient openhab;
+
+		private Timer timer;
+		private Dictionary<string, Item> statusItems = new Dictionary<string, Item>();
+
+		public IEnumerable<Item> StatusItems => statusItems.Values;
+
+		public StatusManager(OpenHab.OpenHabClient openhab)
+		{
+			this.openhab = openhab;
+			UpdateStatus();
+			timer = new Timer(DEFAULT_INTERVAL);
+			timer.Elapsed += OnTimer;
+			timer.Enabled = true;
+		}
+
+		private void OnTimer(object sender, ElapsedEventArgs e)
+		{
+			UpdateStatus();
+		}
+
+		private async void UpdateStatus()
+		{
+			try
+			{
+				var items = await openhab.GetItems();
+				foreach (var item in items)
+				{
+					if (!item.name.StartsWith("Problem_")) continue;
+					Item statusItem = null;
+					if (statusItems.ContainsKey(item.name)) statusItem = statusItems[item.name];
+					else
+					{
+						statusItem = new Item()
+						{
+							name = item.name,
+							label = item.label,
+							status = Status.UNKNOWN
+						};
+						statusItems[item.name] = statusItem;
+					}
+					var state = await openhab.GetItemState(item.name);
+					if (state.state == "OFF") statusItem.status = Status.OK;
+					else if (state.state == "ON") statusItem.status = Status.PROBLEM;
+					else statusItem.status = Status.UNKNOWN;
+				}
+
+			}
+			catch (Exception ex)
+			{
+				Console.WriteLine("Exception on getting status: " + ex.ToString());
+			}
+		}
+	}
+}

Program.cs

@@ -8,6 +8,7 @@ using System.Threading;
 using Telegram.Bot;
 using ZaoBot.Config;
 using ZaoBot.OpenHab;
+using ZaoBot.Problems;
 
 namespace ZaoBot
 {
@@ -26,6 +27,7 @@ namespace ZaoBot
 			services.AddSingleton<IConfig, Config.Config>(CreateConfig);
 			services.AddSingleton<OpenHabClient, OpenHabClient>();
 			services.AddSingleton<NotificationReceiver, NotificationReceiver>();
+			services.AddSingleton<StatusManager, StatusManager>();
 
 			services.AddScoped<BotService, BotService>();
 			services.AddScoped<IServiceProvider, IServiceProvider>(p => p);

StatusMenuUserState.cs

@@ -10,6 +10,7 @@ using Telegram.Bot.Args;
 using Telegram.Bot.Types.ReplyMarkups;
 using ZaoBot.Config;
 using ZaoBot.OpenHab;
+using ZaoBot.Problems;
 
 namespace ZaoBot
 {
@@ -22,13 +23,18 @@ namespace ZaoBot
 		HttpClient http = new HttpClient();
 		OpenHabClient openhab;
 		IServiceProvider services;
+		StatusManager statusManager;
 
-		public StatusMenuUserState(IServiceProvider services, ITelegramBotClient botClient, IConfig config, OpenHabClient openhab)
+		public StatusMenuUserState(IServiceProvider services, ITelegramBotClient botClient, 
+			IConfig config, 
+			OpenHabClient openhab,
+			StatusManager statusManager)
 		{
 			this.botClient = botClient;
 			this.config = config.Data;
 			this.openhab = openhab;
 			this.services = services;
+			this.statusManager = statusManager;
 		}
 
 		public async Task<IUserState> ProcessMessage(IUserState previous, Telegram.Bot.Types.Update e)
@@ -37,16 +43,9 @@ namespace ZaoBot
 			if (previous != this)
 			{
 				response = "Возможные проблемы:\n";
-				var items = await openhab.GetItems();
+				foreach (var item in statusManager.StatusItems)
-				foreach (var item in items)
 				{
-					if (!item.name.StartsWith("Problem_")) continue;
+					response += item.label + ": " + item.status + "\n";
-					response += item.label + ": ";
-					var state = await openhab.GetItemState(item.name);
-					if (state.state == "OFF") response += "OK";
-					else if (state.state == "ON") response += "PROBLEM!";
-					else response += "UNKNOWN";
-					response += "\n";
 				}
 			}
 			else if (e.Message.Text == CMD_BACK)