Different types of units. Writing values, relay unit

esp_server/Unit/RelayUnit.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace ESPServer
+{
+	class RelayUnit : Unit
+	{
+		public override byte[] GetWriteCommand(int address, float value)
+		{
+			foreach (var v in values)
+			{
+				if (v.Value.name == "r" && v.Value.addressOffset + baseAddress == address)
+				{
+					return GetWritePayload(value);
+				}
+			}
+			return null;
+		}
+
+		private byte[] GetWritePayload(float value)
+		{
+			string t = "r_write\x01";
+			if (MathF.Abs(value) < 1e-4) t += "0";
+			else t += "1";
+			t += "\x01";
+			return Encoding.ASCII.GetBytes(t);
+		}
+
+		public override bool IsValueWritable(UnitValue v)
+		{
+			return v.name == "r";
+		}
+	}
+}