Different types of units. Writing values, relay unit

esp_server/UnitDataWriter.cs

@@ -0,0 +1,55 @@
+using NLog;
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Net.Sockets;
+using System.Text;
+using System.Text.Json;
+using System.Threading;
+
+namespace ESPServer
+{
+	class UnitDataWriter
+	{
+		const int UNIT_TARGET_PORT = 7000;
+
+		private readonly Logger logger = LogManager.GetCurrentClassLogger();
+
+		UnitsDatabase db;
+
+		public UnitDataWriter(UnitsDatabase db, RegistersContainer registers)
+		{
+			this.db = db;
+			registers.OnRegisterWritten += OnRegisterWritten;
+		}
+
+		private void OnRegisterWritten(int address, float value)
+		{
+			logger.Debug("Register written, address = " + address.ToString() + " value = " + value.ToString());
+			var unit = db.GetUnit(address);
+			if (unit == null)
+			{
+				return;
+			}
+			var payload = unit.GetWriteCommand(address, value);
+			if (payload == null)
+			{
+				logger.Info("Write of address " + address + " is not supported by unit " + unit.id);
+				return;
+			}
+			try
+			{
+				using (var udpClient = new UdpClient())
+				{
+					udpClient.Connect(unit.ip, UNIT_TARGET_PORT);
+					udpClient.Send(payload, payload.Length);
+					udpClient.Close();
+				}
+			}
+			catch (Exception e)
+			{
+				logger.Error(e.Message);
+			}
+		}
+	}
+}