diff --git a/CyberSystem/ApiServer/Controllers/StateController.cs b/CyberSystem/ApiServer/Controllers/StateController.cs
index fcda4f0..7cf54ee 100644
--- a/CyberSystem/ApiServer/Controllers/StateController.cs
+++ b/CyberSystem/ApiServer/Controllers/StateController.cs
@@ -2,20 +2,25 @@
 
 namespace ApiServer.Controllers
 {
-    [ApiController]
-    [Route("api/state")]
-    public class StateContoller
-    {
-        [HttpGet]
-        public byte GetActualState()
-        {
-            return GetActualStateFromCom.CurrentState;
-        }
+	[ApiController]
+	[Route("api/state")]
+	public class StateContoller
+	{
+		[HttpGet]
+		public byte GetActualState()
+		{
+			return GetActualStateFromCom.CurrentState;
+		}
 
 		[HttpGet]
-        [Route("modbus")]
-		public bool GetActualState(int inputIndex)
+		[Route("modbus")]
+		public ActionResult<bool> GetActualState(int inputIndex)
 		{
+			if (inputIndex > 1)
+			{
+				return new NotFoundResult();
+				//throw new ArgumentOutOfRangeException(nameof(inputIndex), "Значение может быть от 0 до 1 включительно.");
+			}
 			return GetActualStateFromComWithModbus.CurrentState[inputIndex];
 		}
 	}
diff --git a/CyberSystem/ApiServer/GetActualStateFromComWithModbus.cs b/CyberSystem/ApiServer/GetActualStateFromComWithModbus.cs
index 99b00b6..9af4f41 100644
--- a/CyberSystem/ApiServer/GetActualStateFromComWithModbus.cs
+++ b/CyberSystem/ApiServer/GetActualStateFromComWithModbus.cs
@@ -1,31 +1,17 @@
 using Modbus.Device;
-using System;
-using System.Diagnostics.Metrics;
 using System.IO.Ports;
-using System.Threading;
-using System.Threading.Tasks;
 
 
 namespace ApiServer
 {
-	public class GetActualStateFromComWithModbus : IHostedService, IDisposable
+	public class GetActualStateFromComWithModbus : BackgroundService, IDisposable
 	{
 		public static bool[] CurrentState { get; set; }
 
-		static SerialPort _serialPort;
-		static ModbusSerialMaster _serialMaster;
+		private static SerialPort? _serialPort;
+		private static ModbusSerialMaster? _serialMaster;
 
-		static void DataReceivedHandler(object sender, SerialDataReceivedEventArgs e)
-		{
-			_serialMaster = ModbusSerialMaster.CreateRtu(_serialPort);
-
-			byte slaveID = 1;
-			ushort startAddress = 0;
-			ushort numOfPoints = 2;
-			CurrentState = _serialMaster.ReadInputs(slaveID, startAddress, numOfPoints);
-		}
-
-		public Task StartAsync(CancellationToken cancellationToken)
+		protected override async Task ExecuteAsync(CancellationToken stoppingToken)
 		{
 			_serialPort = new SerialPort();
 			_serialPort.PortName = "COM5";
@@ -33,20 +19,19 @@ namespace ApiServer
 			_serialPort.DataBits = 8;
 			_serialPort.Parity = Parity.None;
 			_serialPort.StopBits = StopBits.One;
-			_serialPort.DataReceived += new SerialDataReceivedEventHandler(DataReceivedHandler);
 			_serialPort.Open();
 
-			return Task.CompletedTask;
-		}
+			_serialMaster = ModbusSerialMaster.CreateRtu(_serialPort);
+			byte slaveID = 1;
+			ushort startAddress = 0;
+			ushort numOfPoints = 2;
 
-		public Task StopAsync(CancellationToken cancellationToken)
-		{
-			return Task.CompletedTask;
-		}
-
-		public void Dispose()
-		{
-			_serialPort.Dispose();
+			while (!stoppingToken.IsCancellationRequested)
+			{
+				CurrentState = _serialMaster.ReadInputs(slaveID, startAddress, numOfPoints);
+				await Task.Delay(100, stoppingToken);
+			}
+			await Task.CompletedTask;
 		}
 	}
 }