Add project files.

NmeaMessages/GpgsaMessage.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace GpsClient2.NmeaMessages {
+    public class GpgsaMessage : NmeaMessage {
+        #region Description
+
+        //      $GPGSA,A,3,04,05,,09,12,,,24,,,,,2.5,1.3,2.1*39
+
+        //          Where:
+        //              GSA Satellite status
+        //              A        Auto selection of 2D or 3D fix(M = manual)
+        //              3        3D fix - values include:   1 = no fix
+        //                                                  2 = 2D fix
+        //                                                  3 = 3D fix
+        //              04,05... PRNs of satellites used for fix(space for 12)
+        //              2.5      PDOP(dilution of precision)
+        //              1.3      Horizontal dilution of precision(HDOP)
+        //              2.1      Vertical dilution of precision(VDOP)
+        //              *39      the checksum data, always begins with*
+
+        #endregion
+
+        #region Properties
+
+        /// <summary>
+        /// Auto selection of 2D or 3D fix(M = manual)
+        /// </summary>
+        public bool GpsStatusAuto { get; set; }
+
+        /// <summary>
+        /// 3D fix - values include:    1 = no fix
+        //                              2 = 2D fix
+        //                              3 = 3D fix
+        /// </summary>
+        public SatelliteFixType SatelliteFix { get; set; }
+
+        /// <summary>
+        /// PRNs of satellites used for fix(space for 12)
+        /// </summary>
+        public string Pnrs { get; set; }
+
+        /// <summary>
+        /// PDOP(dilution of precision)
+        /// </summary>
+        public float Pdop { get; set; }
+
+
+        /// <summary>
+        /// Horizontal dilution of precision(HDOP)
+        /// </summary>
+        public float Hdop { get; set; }
+
+        /// <summary>
+        /// Vertical dilution of precision(VDOP)
+        /// </summary>
+        public float Vdop { get; set; }
+
+        #endregion
+
+        #region Message parsing
+
+        public override void Parse(string[] messageParts) {
+            if (messageParts == null || messageParts.Length < 9) {
+                throw new ArgumentException("Invalid GPGSA message");
+            }
+            GpsStatusAuto = messageParts[1].ToBoolean("A");
+            SatelliteFix = (SatelliteFixType)Enum.Parse(typeof(SatelliteFixType), messageParts[2]);
+            for (var i = 0 + 3; i < 12 + 3; i++) {
+                Pnrs += $"{messageParts[i]},";
+            }
+
+            Pdop = messageParts[15].ToFloat();
+            Hdop = messageParts[16].ToFloat();
+            Vdop = messageParts[17].ToFloat();
+        }
+
+        #endregion
+
+        public override string ToString() {
+            return $"Status {GpsStatusAuto} - Satellite Fix Type {SatelliteFix}";
+        }
+    }
+}