Added support for UTC offset.

MeadeAutostar497.UnitTests/TelescopeControllerUnitTests.cs

@@ -32,6 +32,7 @@ namespace MeadeAutostar497.UnitTests
             serialMock.Setup(x => x.IsOpen).Returns(() => _isConnected);
 
             _telescopeController = TelescopeController.Instance;
+            _telescopeController.Connected = false;
             _telescopeController.SerialPort = serialMock.Object;
         }
 
@@ -195,7 +196,7 @@ namespace MeadeAutostar497.UnitTests
         [Test]
         public void utcDate_Get_ReturnsExpectedValue()
         {
-            DateTime expectedDate = new DateTime(2019, 04, 30, 12, 32, 24, DateTimeKind.Utc);
+            DateTime expectedDate = new DateTime(2019, 04, 30, 11, 32, 24, DateTimeKind.Local);
 
             var dateString = "04/30/19";
             var timeString = "12:32:24";
@@ -204,6 +205,7 @@ namespace MeadeAutostar497.UnitTests
 
             _telescopeController.Connected = true;
 
+            serialMock.Setup(x => x.CommandTerminated(":GG#", "#")).Returns("-01");
             serialMock.Setup(x => x.CommandTerminated(":GC#", "#")).Returns(dateString);
             serialMock.Setup(x => x.CommandTerminated(":GL#", "#")).Returns(timeString);
 
@@ -216,7 +218,9 @@ namespace MeadeAutostar497.UnitTests
         public void utcDate_Set_SetsTelescopeDateAndTime()
         {
             DateTime testDateTime = new DateTime(2019, 04, 30, 19, 53, 32, DateTimeKind.Utc);
-            serialMock.Setup(x => x.CommandChar($":SL{testDateTime.Hour:00}:{testDateTime.Minute:00}:{testDateTime.Second:00}#")).Returns('1');
+
+            serialMock.Setup(x => x.CommandTerminated(":GG#", "#")).Returns("-01");
+            serialMock.Setup(x => x.CommandChar($":SL{testDateTime.Hour+1:00}:{testDateTime.Minute:00}:{testDateTime.Second:00}#")).Returns('1');
             serialMock.Setup(x => x.CommandChar($":SC{testDateTime.Month:00}/{testDateTime.Day:00}/{testDateTime:yy}#")).Returns('1');
 
             _isConnected = true;
@@ -230,6 +234,8 @@ namespace MeadeAutostar497.UnitTests
         public void utcDate_Set_ThrowsExceptionWhenTimeInvalid()
         {
             DateTime testDateTime = new DateTime(2019, 04, 30, 19, 53, 32, DateTimeKind.Utc);
+
+            serialMock.Setup(x => x.CommandTerminated(":GG#", "#")).Returns("-01");
             //serialMock.Setup(x => x.CommandChar($":SL{testDateTime.Hour:00}:{testDateTime.Minute:00}:{testDateTime.Second:00}#")).Returns('1');
             serialMock.Setup(x => x.CommandChar($":SC{testDateTime.Month:00}/{testDateTime.Day:00}/{testDateTime:yy}#")).Returns('1');
 
@@ -245,8 +251,10 @@ namespace MeadeAutostar497.UnitTests
         [Test]
         public void utcDate_Set_ThrowsExceptionWhenDateInvalid()
         {
-            DateTime testDateTime = new DateTime(2019, 04, 30, 19, 53, 32, DateTimeKind.Utc);
+            DateTime testDateTime = new DateTime(2019, 04, 30, 19, 53, 32, DateTimeKind.Local);
-            serialMock.Setup(x => x.CommandChar($":SL{testDateTime.Hour:00}:{testDateTime.Minute:00}:{testDateTime.Second:00}#")).Returns('1');
+
+            serialMock.Setup(x => x.CommandTerminated(":GG#", "#")).Returns("-01");
+            serialMock.Setup(x => x.CommandChar($":SL{testDateTime.Hour+1:00}:{testDateTime.Minute:00}:{testDateTime.Second:00}#")).Returns('1');
             //serialMock.Setup(x => x.CommandChar($":SC{testDateTime.Month:00}/{testDateTime.Day:00}/{testDateTime:yy}#")).Returns('1');
 
             _isConnected = true;

MeadeAutostar497/Controller/TelescopeController.cs

@@ -131,15 +131,20 @@ namespace ASCOM.MeadeAutostar497.Controller
                 int minute = telescopeTime.Substring(3, 2).ToInteger();
                 int second = telescopeTime.Substring(6, 2).ToInteger();
 
+                var utcCorrection = GetUtcCorrection();
+
                 //Todo is this telescope local time, or real utc?
-                var newDate = new DateTime(year, month, day, hour, minute, second, DateTimeKind.Utc);
+                var newDate = new DateTime(year, month, day, hour, minute, second, DateTimeKind.Utc) + utcCorrection;
 
                 return newDate;
             }
             set
             {
+                var utcCorrection = GetUtcCorrection();
+                var localDateTime = value - utcCorrection;
+
                 //Todo is this telescope local time, or real utc?
-                var timeResult = SerialPort.CommandChar($":SL{value:HH:mm:ss}#");
+                var timeResult = SerialPort.CommandChar($":SL{localDateTime:HH:mm:ss}#");
                 if (timeResult != '1')
                 {
                     throw new InvalidOperationException("Failed to set local time");
@@ -148,7 +153,7 @@ namespace ASCOM.MeadeAutostar497.Controller
                 SerialPort.Lock();
                 try
                 {
-                    var dateResult = SerialPort.CommandChar($":SC{value:MM/dd/yy}#");
+                    var dateResult = SerialPort.CommandChar($":SC{localDateTime:MM/dd/yy}#");
                     if (dateResult != '1')
                     {
                         throw new InvalidOperationException("Failed to set local date");
@@ -166,6 +171,14 @@ namespace ASCOM.MeadeAutostar497.Controller
 
         }
 
+        private TimeSpan GetUtcCorrection()
+        {
+            string utcOffSet = SerialPort.CommandTerminated(":GG#", "#");
+            double utcOffsetHours = double.Parse(utcOffSet);
+            TimeSpan utcCorrection = TimeSpan.FromHours(utcOffsetHours);
+            return utcCorrection;
+        }
+
         public double SiteLatitude
         {
             get