Added support for reading Declination

MeadeAutostar497.UnitTests/TelescopeControllerUnitTests.cs

@@ -536,5 +536,20 @@ namespace MeadeAutostar497.UnitTests
 
             Assert.That( az, Is.EqualTo(expectedResult));
         }
+
+        [TestCase("+75*13", 75.2166666666666654)]
+        [TestCase("+65*13'21", 65.222499999999997)]
+        public void Declination_CanGetValue(string response, double expectedResult)
+        {
+            serialMock.Setup(x => x.CommandTerminated(":GD#", "#")).Returns(response);
+
+            _isConnected = true;
+
+            _telescopeController.Connected = true;
+
+            var result = _telescopeController.Declination;
+
+            Assert.That(result, Is.EqualTo(expectedResult));
+        }
     }
 }

MeadeAutostar497/AscomClasses/Telescope.cs

@@ -524,7 +524,7 @@ namespace ASCOM.MeadeAutostar497
         {
             get
             {
-                double declination = 0.0;
+                double declination = _telescopeController.Declination;
                 tl.LogMessage("Declination", "Get - " + utilities.DegreesToDMS(declination, ":", ":"));
                 return declination;
             }

MeadeAutostar497/Controller/ITelescopeController.cs

@@ -15,6 +15,7 @@ namespace ASCOM.MeadeAutostar497.Controller
         AlignmentModes AlignmentMode { get; set; }
         bool AtPark { get; }
         double Azimuth { get; }
+        double Declination { get; }
         void AbortSlew();
         void PulseGuide(GuideDirections direction, int duration);
         void Park();

MeadeAutostar497/Controller/TelescopeController.cs

@@ -322,6 +322,21 @@ namespace ASCOM.MeadeAutostar497.Controller
             }
         }
 
+        public double Declination
+        {
+            get
+            {
+                var result = SerialPort.CommandTerminated(":GD#", "#");
+                //:GD# Get Telescope Declination.
+                //Returns: sDD* MM# or sDD*MM’SS#
+                //Depending upon the current precision setting for the telescope.
+
+                double az = DMSToDouble(result);
+
+                return az;
+            }
+        }
+
         public void AbortSlew()
         {
             SerialPort.Command("#:Q#");