1.修复BCD扩展bug

2.修改单元测试

src/JT809.Protocol.Test/JT809HeaderTest.cs

@@ -23,6 +23,7 @@ namespace JT809.Protocol.Test
             jT809Header.EncryptFlag = JT809Header_Encrypt.None;
             jT809Header.EncryptKey = 0;
             var hex = JT809Serializer.Serialize(jT809Header).ToHexString();
+            Assert.Equal("00000018000004009600000004B00100000000000000", hex);
             //"00 00 00 18 00 00 04 00 96 00 00 00 04 B0 01 00 00 00 00 00 00 00"
         }
 
@@ -66,6 +67,7 @@ namespace JT809.Protocol.Test
             jT809Header.EncryptFlag = JT809Header_Encrypt.None;
             jT809Header.EncryptKey = 0;
             var hex = JT809Serializer.Serialize(jT809Header).ToHexString();
+            Assert.Equal("00000018000004009600000004B0FFAABB0000000000", hex);
         }
     }
 }

src/JT809.Protocol.Test/JT809MessageBody/JT809_0x1001Test.cs

@@ -20,6 +20,7 @@ namespace JT809.Protocol.Test.JT809MessageBody
             jT809_0X1001.DownLinkIP = "127.0.0.1";
             jT809_0X1001.DownLinkPort = 809;
             var hex = JT809Serializer.Serialize(jT809_0X1001).ToHexString();
+            Assert.Equal("0133EFB832303138303932303132372E302E302E3100000000000000000000000000000000000000000000000329", hex);
             //5B 
             //00 00 00 48 
             //00 00 00 85 

src/JT809.Protocol.Test/JT809MessageBody/JT809_0x1002Test.cs

@@ -19,6 +19,7 @@ namespace JT809.Protocol.Test.JT809MessageBody
             jT809_0X1002.VerifyCode = 54456;
             var hex = JT809Serializer.Serialize(jT809_0X1002).ToHexString();
             //"00 00 00 D4 B8"
+            Assert.Equal("000000D4B8", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809MessageBody/JT809_0x1003Test.cs

@@ -19,6 +19,7 @@ namespace JT809.Protocol.Test.JT809MessageBody
             jT809_0X1003.Password = "20180920";
             var hex = JT809Serializer.Serialize(jT809_0X1003).ToHexString();
             //"01 33 EF B8 32 30 31 38 30 39 32 30"
+            Assert.Equal("0133EFB83230313830393230", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809MessageBody/JT809_0x1007Test.cs

@@ -17,6 +17,7 @@ namespace JT809.Protocol.Test.JT809MessageBody
             JT809_0x1007 jT809_0X1007 = new JT809_0x1007();
             jT809_0X1007.ErrorCode = JT809Enums.JT809_0x1007_ErrorCode.主链路断开;
             var hex = JT809Serializer.Serialize(jT809_0X1007).ToHexString();
+            Assert.Equal("00", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809MessageBody/JT809_0x1008Test.cs

@@ -17,6 +17,7 @@ namespace JT809.Protocol.Test.JT809MessageBody
             JT809_0x1008 jT809_0X1008 = new JT809_0x1008();
             jT809_0X1008.ReasonCode = JT809Enums.JT809_0x1008_ReasonCode.网关重启;
             var hex = JT809Serializer.Serialize(jT809_0X1008).ToHexString();
+            Assert.Equal("00", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809MessageBody/JT809_0x1200Test.cs

@@ -30,6 +30,7 @@ namespace JT809.Protocol.Test.JT809MessageBody
             };
             jT809_0X1200.SubBodies = jT809_0X1200_0X1201;
             var hex = JT809Serializer.Serialize(jT809_0X1200).ToHexString();
+            Assert.Equal("D4C1413132333435000000000000000000000000000112010000003D00000000000000423A35C700000000000000423A35C7313131313131313100000000000000000000000031313131314141323232323232323232323232", hex);
             //"D4 C1 41 31 32 33 34 35 00 00 00 00 00 00 00 00 00 00 00 00 00 01 12 01 00 00 00 3D 00 00 00 00 00 00 00 42 3A 35 C7 00 00 00 00 00 00 00 42 3A 35 C7 31 31 31 31 31 31 31 31 00 00 00 00 00 00 00 00 00 00 00 00 31 31 31 31 31 41 41 32 32 32 32 32 32 32 32 32 32 32 32"
             //"D4 C1 41 31 32 33 34 35 00 00 00 00 00 00 00 00 00 00 00 00 00 01 12 01 00 00 00 3D 00 00 00 00 00 00 00 42 3A 35 C7 00 00 00 00 00 00 00 42 3A 35 C7 31 31 31 31 31 31 31 31 00 00 00 00 00 00 00 00 00 00 00 00 31 31 31 31 31 61 61 32 32 32 32 32 32 32 32 32 32 32 32"
         }

src/JT809.Protocol.Test/JT809MessageBody/JT809_0x1300Test.cs

@@ -26,6 +26,7 @@ namespace JT809.Protocol.Test.JT809MessageBody
             };
             var hex = JT809Serializer.Serialize(jT809Bodies).ToHexString();
             //"13 01 00 00 00 1B 01 31 31 31 00 00 00 00 00 00 00 00 00 00 00 04 D2 00 00 00 06 32 32 68 61 32 32"
+            Assert.Equal("13010000001B01313131000000000000000000000004D200000006323268613232", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809MessageBody/JT809_0x1600Test.cs

@@ -25,6 +25,7 @@ namespace JT809.Protocol.Test.JT809MessageBody
             };
             var hex = JT809Serializer.Serialize(jT809Bodies).ToHexString();
             //"D4 C1 41 31 32 33 34 35 00 00 00 00 00 00 00 00 00 00 00 00 00 01 16 01 00 00 00 06 CA B2 C3 B4 B9 ED"
+            Assert.Equal("D4C14131323334350000000000000000000000000001160100000006CAB2C3B4B9ED",hex);            
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809MessageBody/JT809_0x9001Test.cs

@@ -17,6 +17,7 @@ namespace JT809.Protocol.Test.JT809MessageBody
             JT809_0x9001 jT809_0X9001 = new JT809_0x9001();
             jT809_0X9001.VerifyCode = 45454;
             var hex = JT809Serializer.Serialize(jT809_0X9001).ToHexString();
+            Assert.Equal("0000B18E", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809MessageBody/JT809_0x9002Test.cs

@@ -17,6 +17,7 @@ namespace JT809.Protocol.Test.JT809MessageBody
             JT809_0x9002 jT809_0X9002 = new JT809_0x9002();
             jT809_0X9002.Result =  JT809Enums.JT809_0x9002_Result.成功;
             var hex = JT809Serializer.Serialize(jT809_0X9002).ToHexString();
+            Assert.Equal("00", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809MessageBody/JT809_0x9003Test.cs

@@ -17,6 +17,7 @@ namespace JT809.Protocol.Test.JT809MessageBody
             JT809_0x9003 jT809_0X9003 = new JT809_0x9003();
             jT809_0X9003.VerifyCode = 45454;
             var hex = JT809Serializer.Serialize(jT809_0X9003).ToHexString();
+            Assert.Equal("0000B18E",hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809MessageBody/JT809_0x9007Test.cs

@@ -17,6 +17,7 @@ namespace JT809.Protocol.Test.JT809MessageBody
             JT809_0x9007 jT809_0X9007 = new JT809_0x9007();
             jT809_0X9007.ReasonCode =  JT809Enums.JT809_0x9007_ReasonCode.无法连接下级平台指定的服务IP与端口;
             var hex = JT809Serializer.Serialize(jT809_0X9007).ToHexString();
+            Assert.Equal("00", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809MessageBody/JT809_0x9008Test.cs

@@ -17,6 +17,7 @@ namespace JT809.Protocol.Test.JT809MessageBody
             JT809_0x9008 jT809_0X9008 = new JT809_0x9008();
             jT809_0X9008.ReasonCode = JT809Enums.JT809_0x9008_ReasonCode.其它原因;
             var hex = JT809Serializer.Serialize(jT809_0X9008).ToHexString();
+            Assert.Equal("01", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809MessageBody/JT809_0x9101Test.cs

@@ -19,6 +19,7 @@ namespace JT809.Protocol.Test.JT809MessageBody
             jT809_0X9101.StartTime = 1537513862;
             jT809_0X9101.EndTime = 1537531862;
             var hex = JT809Serializer.Serialize(jT809_0X9101).ToHexString();
+            Assert.Equal("00002710000000005BA49986000000005BA4DFD6",hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809Packages/JT809_0x1001EncryptPackageTest.cs

@@ -41,6 +41,7 @@ namespace JT809.Protocol.Test.JT809Packages
             jT809Package.Bodies = jT809_0X1001;
             var hex = JT809Serializer.Serialize(jT809Package).ToHexString();
             //"5B 00 00 00 48 00 00 00 85 10 01 01 33 EF B8 01 00 00 01 00 00 16 BB D3 7D 9C C4 90 0C 77 DC 78 F8 67 65 27 D8 AE 12 24 3C FB 64 CC 2F BA 61 9A EF AD 33 AC CB 32 56 F6 7B FF 19 DF 33 09 78 41 09 86 65 70 3F 2E B5 5D"
+            Assert.Equal("5B000000480000008510010133EFB8010000010003E8B2D37D9CC4900C77DC78F8676527D8AE12243CFB64CC2FBA619AEFAD33ACCB3256F67BFF19DF33097841098665703FE36E5D", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809Packages/JT809_0x1001PackageTest.cs

@@ -28,6 +28,7 @@ namespace JT809.Protocol.Test.JT809Packages
             jT809_0X1001.DownLinkPort = 809;
             jT809Package.Bodies = jT809_0X1001;
             var hex = JT809Serializer.Serialize(jT809Package).ToHexString();
+            Assert.Equal("5B000000480000008510010133EFB8010000000000270F0133EFB832303138303932303132372E302E302E31000000000000000000000000000000000000000000000003296A915D", hex);
             //"5B 
             //00 00 00 48 
             //00 00 00 85 
@@ -65,6 +66,7 @@ namespace JT809.Protocol.Test.JT809Packages
         [Fact]
         public void Test3()
         {
+            Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
             //字符'0'：char c = '0'; 它的ASCII码实际上是48。
             //字符'\0' : ASCII码为0，表示一个字符串结束的标志。
             //"5B 00 00 00 48 00 00 00 85 10 01 01 33 EF B8 01 00 00 00 00 00 27 0F 30 01 33 EF B8 32 30 31 38 30 39 32 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 31 32 37 2E 30 2E 30 2E 31 03 29 7D 38 5D"

src/JT809.Protocol.Test/JT809Packages/JT809_0x9400_0x9401PackageTest.cs

@@ -50,6 +50,7 @@ namespace JT809.Protocol.Test.JT809Packages
             jT809Package.Bodies = bodies;
             var hex = JT809Serializer.Serialize(jT809Package).ToHexString();
             //"5B 00 00 00 92 00 00 06 82 94 00 01 33 EF B8 01 00 00 00 00 00 27 0F D4 C1 41 31 32 33 34 35 00 00 00 00 00 00 00 00 00 00 00 00 00 02 94 01 00 00 00 5C 01 00 02 00 00 00 00 5A 01 AC 3F 40 12 3F FA A1 00 00 00 00 5A 01 AC 4D 50 03 73 6D 61 6C 6C 63 68 69 00 00 00 00 00 00 00 00 31 32 33 34 35 36 37 38 39 30 31 00 00 00 00 00 00 00 00 00 31 32 33 34 35 36 40 71 71 2E 63 6F 6D 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 BA D8 5D"
+            Assert.Equal("5B000000920000068294000133EFB8010000000000270FD4C1413132333435000000000000000000000000000294010000005C010002000000005A01AC3F40123FFAA1000000005A01AC4D5003736D616C6C636869000000000000000031323334353637383930310000000000000000003132333435364071712E636F6D00000000000000000000000000000000000000BAD85D", hex);
         }
 
         [Fact]
@@ -113,6 +114,7 @@ namespace JT809.Protocol.Test.JT809Packages
             jT809Package.Header.MsgSN = 1666;
             var hex = JT809Serializer.Serialize(jT809Package).ToHexString();
             //"5B000000920000068294000133EFB8010000000000270FD4C1413132333435000000000000000000000000000294010000005C010002000000005A01AC3F40123FFAA1000000005A01AC4D5003736D616C6C636869000000000000000031323334353637383930310000000000000000003132333435364071712E636F6D00000000000000000000000000000000000000BAD85D"
+            Assert.Equal("5B000000920000068294000133EFB8010000000000270FD4C1413132333435000000000000000000000000000294010000005C010002000000005A01AC3F40123FFAA1000000005A01AC4D5003736D616C6C636869000000000000000031323334353637383930310000000000000000003132333435364071712E636F6D00000000000000000000000000000000000000BAD85D", hex);
         }
     }
 }

src/JT809.Protocol.Test/JT809SubMessageBody/JT809_0x1200_0x1201Test.cs

@@ -25,6 +25,7 @@ namespace JT809.Protocol.Test.JT809SubMessageBody
             };
             var hex = JT809Serializer.Serialize(jT809_0X1200_0X1201).ToHexString();
             //"00 00 00 00 00 00 00 42 3A 35 C7 00 00 00 00 00 00 00 42 3A 35 C7 31 31 31 31 31 31 31 31 00 00 00 00 00 00 00 00 00 00 00 00 31 31 31 31 31 41 41 32 32 32 32 32 32 32 32 32 32 32 32"
+            Assert.Equal("00000000000000423A35C700000000000000423A35C7313131313131313100000000000000000000000031313131314141323232323232323232323232",hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809SubMessageBody/JT809_0x1200_0x1202Test.cs

@@ -33,6 +33,7 @@ namespace JT809.Protocol.Test.JT809SubMessageBody
             jT809_0X1200_0X1202.VehiclePosition.Alarm = 257;
             var hex = JT809Serializer.Serialize(jT809_0X1200_0X1202).ToHexString();
             //"00 13 07 07 DC 0F 0F 0F 07 EF 4D 80 01 70 18 40 00 32 00 33 00 00 00 96 00 2D 00 2D 00 00 00 03 00 00 01 01"
+            Assert.Equal("00130707DC0F0F0F07EF4D80017018400032003300000096002D002D0000000300000101", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809SubMessageBody/JT809_0x1200_0x1203Test.cs

@@ -76,6 +76,7 @@ namespace JT809.Protocol.Test.JT809SubMessageBody
 
             var hex = JT809Serializer.Serialize(jT809_0X1200_0X1203).ToHexString();
             //"03 00 13 07 07 DC 0F 0F 0F 07 EF 4D 80 01 70 18 40 00 32 00 33 00 00 00 96 00 2D 00 2D 00 00 00 03 00 00 01 01 00 13 07 07 DC 10 10 10 07 EF 4D 80 01 70 18 40 00 32 00 33 00 00 00 96 00 2D 00 2D 00 00 00 03 00 00 01 01 00 13 07 07 DC 11 11 11 07 EF 4D 80 01 70 18 40 00 32 00 33 00 00 00 96 00 2D 00 2D 00 00 00 03 00 00 01 01"
+            Assert.Equal("0300130707DC0F0F0F07EF4D80017018400032003300000096002D002D000000030000010100130707DC10101007EF4D80017018400032003300000096002D002D000000030000010100130707DC11111107EF4D80017018400032003300000096002D002D0000000300000101", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809SubMessageBody/JT809_0x1200_0x1207Test.cs

@@ -22,6 +22,7 @@ namespace JT809.Protocol.Test.JT809SubMessageBody
             };
             var hex = JT809Serializer.Serialize(jT809_0X1200_0X1201).ToHexString();
             //"00 00 00 00 5B A8 80 B6 00 00 00 00 5B A9 01 6B"
+            Assert.Equal("000000005BA880B6000000005BA9016B",hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809SubMessageBody/JT809_0x1200_0x1209Test.cs

@@ -22,6 +22,7 @@ namespace JT809.Protocol.Test.JT809SubMessageBody
             };
             var hex = JT809Serializer.Serialize(jT809_0X1200_0X1209).ToHexString();
             //"00 00 00 00 5B A8 80 B6 00 00 00 00 5B A9 01 6B"
+            Assert.Equal("000000005BA880B6000000005BA9016B",hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809SubMessageBody/JT809_0x1200_0x120ATest.cs

@@ -24,6 +24,7 @@ namespace JT809.Protocol.Test.JT809SubMessageBody
             };
             var hex = JT809Serializer.Serialize(jT809_0X1200_0X120A).ToHexString();
             //"73 6D 61 6C 6C 63 68 69 00 00 00 00 00 00 00 00 31 32 33 34 35 36 37 38 39 31 32 33 34 35 36 37 38 39 00 00 61 62 63 64 65 66 31 32 33 34 35 36 37 38 39 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 77 77 77 31 32 33 34 35 36 37 38 39 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00"
+            Assert.Equal("736D616C6C63686900000000000000003132333435363738393132333435363738390000616263646566313233343536373839000000000000000000000000000000000000000000000000007777773132333435363738390000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000", hex);Assert.Equal("736D616C6C63686900000000000000003132333435363738393132333435363738390000616263646566313233343536373839000000000000000000000000000000000000000000000000007777773132333435363738390000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809SubMessageBody/JT809_0x1200_0x120BTest.cs

@@ -21,6 +21,7 @@ namespace JT809.Protocol.Test.JT809SubMessageBody
             };
             var hex = JT809Serializer.Serialize(jT809_0X1200_0X120B).ToHexString();
             //"00 00 00 0C 61 73 64 31 32 33 34 35 36 61 73 64"
+            Assert.Equal("0000000C617364313233343536617364", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809SubMessageBody/JT809_0x1300_0x1301Test.cs

@@ -24,6 +24,7 @@ namespace JT809.Protocol.Test.JT809SubMessageBody
             };
             var hex = JT809Serializer.Serialize(jT809_0x1300_0x1301).ToHexString();
             //"01 31 31 31 00 00 00 00 00 00 00 00 00 00 00 04 D2 00 00 00 06 32 32 68 61 32 32"
+            Assert.Equal("01313131000000000000000000000004D200000006323268613232", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809SubMessageBody/JT809_0x1400_0x1402Test.cs

@@ -26,6 +26,7 @@ namespace JT809.Protocol.Test.JT809SubMessageBody
             };
             var hex = JT809Serializer.Serialize(jT809_0x1400_0x1402).ToHexString();
             // "01 00 0B 00 00 00 00 5B AA 5B 80 00 00 0D 10 00 00 00 0A 67 66 64 66 34 35 34 35 35 33"
+            Assert.Equal("01000B000000005BAA5B8000000D100000000A67666466343534353533", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809SubMessageBody/JT809_0x1400_0x1403Test.cs

@@ -23,6 +23,7 @@ namespace JT809.Protocol.Test.JT809SubMessageBody
             };
             var hex = JT809Serializer.Serialize(jT809_0x1400_0x1403).ToHexString();
             // "00 00 0D 10 03"
+            Assert.Equal("00000D1003", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809SubMessageBody/JT809_0x1500_0x1502Test.cs

@@ -44,6 +44,7 @@ namespace JT809.Protocol.Test.JT809SubMessageBody
             };
             var hex = JT809Serializer.Serialize(jT809_0x1500_0x1502).ToHexString();
             //"01 00 13 07 07 DC 0F 0F 0F 07 EF 4D 80 01 70 18 40 00 35 00 2D 00 00 04 D2 00 2D 00 2D 00 00 00 01 00 00 00 01 7B 00 00 00 00 01 01"
+            Assert.Equal("0100130707DC0F0F0F07EF4D80017018400035002D000004D2002D002D00000001000000017B000000000101", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809SubMessageBody/JT809_0x1500_0x1504Test.cs

@@ -23,6 +23,7 @@ namespace JT809.Protocol.Test.JT809SubMessageBody
             };
             var hex = JT809Serializer.Serialize(jT809_0x1400_0x1403).ToHexString();
             // "00 00 0D 10 03"
+            Assert.Equal("00000D1003",hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809SubMessageBody/JT809_0x9300_0x9301Test.cs

@@ -25,6 +25,7 @@ namespace JT809.Protocol.Test.JT809SubMessageBody
             };
             var hex = JT809Serializer.Serialize(jT809_0x9300_0x9301).ToHexString();
             // "02 73 6D 61 6C 6C 63 68 69 00 00 00 00 00 00 0D 10 00 00 00 05 72 65 70 6C 79"
+            Assert.Equal("02736D616C6C6368690000000000000D10000000057265706C79", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809SubMessageBody/JT809_0x9400_0x9401Test.cs

@@ -30,6 +30,7 @@ namespace JT809.Protocol.Test.JT809SubMessageBody
             };
             var hex = JT809Serializer.Serialize(jT809_0x9400_0x9401).ToHexString();
             //"01 00 02 00 00 00 00 5B AC 3F 40 12 3F FA A1 00 00 00 00 5B AC 4D 50 03 73 6D 61 6C 6C 63 68 69 00 00 00 00 00 00 00 00 31 32 33 34 35 36 37 38 39 30 31 00 00 00 00 00 00 00 00 00 31 32 33 34 35 36 40 71 71 2E 63 6F 6D 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00"
+            Assert.Equal("010002000000005BAC3F40123FFAA1000000005BAC4D5003736D616C6C636869000000000000000031323334353637383930310000000000000000003132333435364071712E636F6D00000000000000000000000000000000000000", hex);
         }
 
         [Fact]

src/JT809.Protocol.Test/JT809SubMessageBody/JT809_0x9500_0x9504Test.cs

@@ -26,7 +26,7 @@ namespace JT809.Protocol.Test.JT809SubMessageBody
             var hex = JT809Serializer.Serialize(jT809_0X9500_0X9504).ToHexString();
             //"10 18 09 27 20 00 20 18 09 27 23 00 20 15 B4"
             //"10 18 09 27 20 00 20 18 09 27 23 00 20 15 B4"
-
+            Assert.Equal("1018092720002018092723002015B4",hex);
             //5B 00 00 00 45 00 00 00 85 95 00 01 33 53 D5 01 00 00 00 00 00 27 0F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 95 04 00 00 00 0F 10 18 09 27 20 00 20 18 09 27 23 00 20 15 B4 3C D8 5D
         }
 

src/JT809.Protocol.Test/JT809SubMessageBody/JT809_0x9500_0x9505Test.cs

@@ -28,6 +28,7 @@ namespace JT809.Protocol.Test.JT809SubMessageBody
                  EndTime=DateTime.Parse("2018-09-27 20:00:00")
             };
             var hex = JT809Serializer.Serialize(jT809_0X9500_0X9505).ToHexString();
+            Assert.Equal("000000000000000008086A743830380000000000000000000000000000006164736C736D616C6C636869000000000000000000000000000000000000000000000000000000000000000000000000006164736C3132330000000000000000000000000000003132372E302E302E31000000000000000000000000000000000000000000000003280329000000005BACC640", hex);
             //"00 00 00 00 00 00 00 00 08 08 6A 74 38 30 38 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 61 64 73 6C 73 6D 61 6C 6C 63 68 69 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 61 64 73 6C 31 32 33 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 31 32 37 2E 30 2E 30 2E 31 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 28 03 29 00 00 00 00 5B AC C6 40"
             //"00 00 00 00 00 00 00 00 08 08 6A 74 38 30 38 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 61 64 73 6C 73 6D 61 6C 6C 63 68 69 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 61 64 73 6C 31 32 33 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 31 32 37 2E 30 2E 30 2E 31 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 28 03 29 00 00 00 00 5A 01 AC C6 40"
         }
@@ -37,7 +38,7 @@ namespace JT809.Protocol.Test.JT809SubMessageBody
         {
             var bytes = "00 00 00 00 00 00 00 00 08 08 6A 74 38 30 38 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 61 64 73 6C 73 6D 61 6C 6C 63 68 69 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 61 64 73 6C 31 32 33 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 31 32 37 2E 30 2E 30 2E 31 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 28 03 29 00 00 00 00 5B AC C6 40".ToHexBytes();
             JT809_0x9500_0x9505 jT809_0X9500_0X9505 = JT809Serializer.Deserialize<JT809_0x9500_0x9505>(bytes);
-            Assert.Equal("00000000000000000808", jT809_0X9500_0X9505.AuthenticationCode);
+            Assert.Equal("808", jT809_0X9500_0X9505.AuthenticationCode);
             Assert.Equal("jt808", jT809_0X9500_0X9505.AccessPointName);
             Assert.Equal("adslsmallchi", jT809_0X9500_0X9505.UserName);
             Assert.Equal("adsl123", jT809_0X9500_0X9505.Password);

src/JT809.Protocol/JT809Extensions/JT809BCDExtensions.cs

@@ -10,32 +10,36 @@ namespace JT809.Protocol.JT809Extensions
     {
         public static string ReadBCDLittle(ReadOnlySpan<byte> buf, ref int offset, int len)
         {
-            StringBuilder bcdSb = new StringBuilder(len*2);
-            for(int i = 0; i < len; i++)
+            int count = len / 2;
+            StringBuilder bcdSb = new StringBuilder(count);
+            for (int i = 0; i < count; i++)
             {
                 bcdSb.Append(buf[offset + i].ToString("X2"));
             }
-            offset = offset + len;
-            return bcdSb.ToString();
+            offset = offset + count;
+            return bcdSb.ToString().TrimStart('0');
         }
 
-        public static int WriteBCDLittle(byte[] bytes, int offset, string data,int len)
+        public static int WriteBCDLittle(byte[] bytes, int offset, string data, int len)
         {
             string bcdText = data == null ? "" : data;
             int startIndex = 0;
-            int noOfZero = len * 2 - bcdText.Length;
+            int noOfZero = len - bcdText.Length;
             if (noOfZero > 0)
             {
                 bcdText = bcdText.Insert(startIndex, new string('0', noOfZero));
             }
             int byteIndex = 0;
-            while (startIndex < bcdText.Length && byteIndex < len)
+            int count = len / 2;
+            byte[] tempBytes = new byte[count];
+            while (startIndex < bcdText.Length && byteIndex < count)
             {
-                bytes[startIndex + offset] = Convert.ToByte(bcdText.Substring(startIndex, 2), 16);
+                tempBytes[byteIndex] = Convert.ToByte(bcdText.Substring(startIndex, 2), 16);
                 startIndex += 2;
                 byteIndex++;
             }
-            return len;
+            Array.Copy(tempBytes, 0, bytes, offset, tempBytes.Length);
+            return count;
         }
     }
 }

src/JT809.Protocol/JT809Formatters/JT809SubMessageBodyFormatters/JT809_0x9500_0x9505Formatter.cs

@@ -13,7 +13,7 @@ namespace JT809.Protocol.JT809Formatters.JT809SubMessageBodyFormatters
         {
             int offset = 0;
             JT809_0x9500_0x9505 jT809_0X9500_0X9505 = new JT809_0x9500_0x9505();
-            jT809_0X9500_0X9505.AuthenticationCode= JT809BinaryExtensions.ReadBCDLittle(bytes, ref offset,10);
+            jT809_0X9500_0X9505.AuthenticationCode= JT809BinaryExtensions.ReadBCDLittle(bytes, ref offset,20);
             jT809_0X9500_0X9505.AccessPointName = JT809BinaryExtensions.ReadStringLittle(bytes, ref offset, 20);
             jT809_0X9500_0X9505.UserName = JT809BinaryExtensions.ReadStringLittle(bytes, ref offset,49);
             jT809_0X9500_0X9505.Password = JT809BinaryExtensions.ReadStringLittle(bytes, ref offset,22);