Convert project to gradle

248 files changed, 11584 insertions, 0 deletions

diff --git a/src/test/java/org/traccar/protocol/AdmProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/AdmProtocolDecoderTest.java
new file mode 100644
index 000000000..599dd6190
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AdmProtocolDecoderTest.java
@@ -0,0 +1,38 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class AdmProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        AdmProtocolDecoder decoder = new AdmProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "010042033836313331313030323639343838320501000000000000000000000000000000000000000000000000000000000000000000000000000000000000000073"));
+
+        verifyPosition(decoder, binary(
+                "01002e40041c0744009dfe6742c6c860427402000000f4ff077752c8f55b000000000b4132010213430100041e"));
+
+        verifyPosition(decoder, binary(
+                "01002680336510002062A34C423DCF8E42A50B1700005801140767E30F568F2534107D220000"));
+
+        verifyPosition(decoder, binary(
+                "010022003300072020000000000000000044062A330000000000107F10565D4A8310"));
+
+        verifyPosition(decoder, binary(
+                "0100268033641080207AA34C424CCF8E4239030800005B01140755E30F560000F00F70220000"));
+
+        verifyPosition(decoder, binary(
+                "01002680336510002062A34C423DCF8E42A50B1700005801140767E30F568F2534107D220000"));
+
+        verifyPosition(decoder, binary(
+                "01002200333508202000000000000000007F0D9F030000000000E39A1056E24A8210"));
+
+        verifyNotNull(decoder, binary(
+                "01008449443d3120536f66743d30783531204750533d313036382054696d653d30383a35393a32302031302e30392e31372056616c3d30204c61743d36312e36373738204c6f6e3d35302e3832343520563d3020536174436e743d342b3720537461743d30783030313020496e5f616c61726d3d30783030000000000000000000000000"));
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AdmProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/AdmProtocolEncoderTest.java
new file mode 100644
index 000000000..cb0a31ceb
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AdmProtocolEncoderTest.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 Anatoliy Golubev (darth.naihil@gmail.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+import static org.junit.Assert.assertEquals;
+
+public class AdmProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        AdmProtocolEncoder encoder = new AdmProtocolEncoder();
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_GET_DEVICE_STATUS);
+        assertEquals("STATUS\r\n", encoder.encodeCommand(command));
+
+        command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_CUSTOM);
+        command.set(Command.KEY_DATA, "INPUT 0");
+        assertEquals("INPUT 0\r\n", encoder.encodeCommand(command));
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AisProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/AisProtocolDecoderTest.java
new file mode 100644
index 000000000..9cb9f695a
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AisProtocolDecoderTest.java
@@ -0,0 +1,31 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class AisProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        AisProtocolDecoder decoder = new AisProtocolDecoder(null);
+
+        verifyPositions(decoder, text(
+                "!AIVDM,2,1,8,A,53UlSb01l>Ei=H4KF218PTpv222222222222221?8h=766gB0<Ck11DTp888,0*14s:MTb827ebc7686b,c:1481688227737*4d\\\r\n" +
+                "!AIVDM,2,2,8,A,88888888888,2*24\r\n" +
+                "!AIVDM,1,1,,A,13T=Qr0P001cmmLEf;A00?wN0PSU,0*29\r\n" +
+                "!AIVDM,1,1,,A,35Qf023Ohi1n5gdDRLW5FSQP00u@,0*18\r\n" +
+                "!AIVDM,1,1,,A,B3P@f>0000K6J;5KAIT03wpUkP06,0*5D\\s:MTb827ebc7686b,c:1481688230418*45\\\r\n" +
+                "!AIVDM,1,1,,B,B52Q8a@00Ul`9N5@ssbmCwr5oP06,0*36\r\n" +
+                "!AIVDM,1,1,,A,1815<S@01VQnKGlE0sk:WHcT0@O4,0*78\r\n" +
+                "!AIVDM,1,1,,A,35N7G;5OhQG?oJfE`G`cM9E`0001,0*6C\r\n" +
+                "!AIVDM,1,1,,B,13Ug;r0P011cqHJEevuEiOwf0L3h,0*6A\r\n" +
+                "!AIVDM,1,1,,A,13MKsr?0001dJC2Ee4W;jnal08Qj,0*00\r\n\r\n"));
+
+        verifyPositions(decoder, text(
+                "!AIVDM,1,1,,A,H3FUli4T000000000000001p0400,0*6E\\s:MTb827eba584a8,c:1481688176110*46\\\r\n" +
+                "!AIVDM,1,1,,B,13UhUh0P01QcoRTEdtB>4?v<2D=j,0*54\r\n\r\n"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AlematicsProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/AlematicsProtocolDecoderTest.java
new file mode 100644
index 000000000..47ea8137e
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AlematicsProtocolDecoderTest.java
@@ -0,0 +1,42 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class AlematicsProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        AlematicsProtocolDecoder decoder = new AlematicsProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$T,2,64,866050035975497,20180726103446,20180726103514,23.033305,72.558032,0,0,41,5.4,4,0,0,0.000,12.960,0,"));
+
+        verifyPosition(decoder, text(
+                "$T,2,65,866050035975497,20180726103646,20180726103736,23.033305,72.558032,0,0,41,5.4,4,0,0,0.000,12.976,0,0"));
+
+        verifyPosition(decoder, text(
+                "$T,2,552,868259020159698,20170515060949,20170515060949,25.035277,121.561986,0,202,78,1.0,8,1,0,0.000,12.768,1629,38,12770,4109,9"));
+
+        verifyPosition(decoder, text(
+                "$T,2,553,868259020159698,20170515061019,20170515061019,25.035295,121.561981,0,202,79,1.0,8,1,0,0.000,12.768,1629,38,12772,4109,8"));
+
+        verifyPosition(decoder, text(
+                "$T,4,4,868259020159698,20170515061033,20170515061033,25.035303,121.561975,0,202,81,1.7,6,1,0,0.000,12.770,1629,0,$S,A1,1,,12345.67,88.4,301.5,,2593.25,12.4,89.2,,5999.44,789.572,2345.67,,10763,1024,5,"));
+
+        verifyPosition(decoder, text(
+                "$T,2,554,868259020159698,20170515061049,20170515061049,25.035309,121.561976,0,202,82,1.1,7,1,0,0.000,12.768,1629,38,12770,4109,9"));
+
+        verifyPosition(decoder, text(
+                "$T,4,5,868259020159698,20170515061058,20170515061058,25.035308,121.561976,0,202,82,1.2,7,1,0,0.000,12.772,1629,0,$S,A1,1,,12345.67,88.4,301.5,,2593.25,12.4,89.2,,5999.44,789.572,2345.67,,10763,1024,5,"));
+
+        verifyPosition(decoder, text(
+                "$T,50,592,868259020159698,20170515062915,20170515062915,25.035005,121.561555,0,31,89,3.7,5,1,0,0.000,12.752,1629,38,12752,4203,6"));
+
+        verifyPosition(decoder, text(
+                "$T,50,594,868259020159698,20170515062928,20170515062928,25.035151,121.561671,0,31,93,1.8,5,0,0,0.000,12.752,1629,38,12756,4205,6"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AnytrekProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/AnytrekProtocolDecoderTest.java
new file mode 100644
index 000000000..e3aa0550b
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AnytrekProtocolDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class AnytrekProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        AnytrekProtocolDecoder decoder = new AnytrekProtocolDecoder(null);
+
+        verifyPosition(decoder, binary(
+                "78783500300086428703204121160085015111050C0A0D20C6FD24A102FF8EAC0C01001404000000FFFFFFFF131702210000000000000000000D0A"));
+
+        verifyPosition(decoder, binary(
+                "787835003000867279033457792c009801001209080a3408c81b2a7d0305b88b0c00001ccb0000000f00000002b90174f30b000000000000000d0a"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/ApelProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/ApelProtocolDecoderTest.java
new file mode 100644
index 000000000..c32abe6a8
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/ApelProtocolDecoderTest.java
@@ -0,0 +1,25 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class ApelProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        ApelProtocolDecoder decoder = new ApelProtocolDecoder(null);
+
+        /*byte[] buf1 = {0x40,0x4E,0x54,0x43,0x01,0x00,0x00,0x00,0x7B,0x00,0x00,0x00,0x13,0x00,0x44,0x34,0x2A,0x3E,0x53,0x3A,0x38,0x36,0x31,0x37,0x38,0x35,0x30,0x30,0x35,0x32,0x30,0x35,0x30,0x37,0x39};
+        verifyNull(decoder, text( ChannelBuffers.wrappedBuffer(ByteOrder.LITTLE_ENDIAN, buf1)));*/
+
+        //0c002900f12a00000f003235303032363533343135313036340f0033353638393530333632373938313101002000000000
+        //5c00380046e6a95136b693277f11b41a00172709f2ff03160002b9bc630007000000000000000000000000000000c31071090000880500000000000000000000
+        //5c00380072e7a95136b693277f11b41a00172709f2ff03160002b9bc630007000000000000000000000000000000c31071090000880500000000000000000000
+
+        //7900040069ea030000000000
+        //8300c20003006aea03005c003800223aab5107a393276617b41a0030d506e3000414010250bf630007000000000000000000000000000000c3107209000089050000000000006bea03005c003800403aab5107a393276617b41a0030d506e3000414010250bf630007000000000000000000000000000000c3107209000089050000000000006cea03005c0038005e3aab5107a393276617b41a0030d506e3000414010250bf630007000000000000000000000000000000c31072090000890500000000000000000000
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AplicomFrameDecoderTest.java b/src/test/java/org/traccar/protocol/AplicomFrameDecoderTest.java
new file mode 100644
index 000000000..581f7696f
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AplicomFrameDecoderTest.java
@@ -0,0 +1,25 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assert.assertEquals;
+
+public class AplicomFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        AplicomFrameDecoder decoder = new AplicomFrameDecoder();
+
+        assertEquals(
+                binary("44C20146B710C158DA009500B09F7700C054CA0EA454CA0EA403BE0BF6015D706B070000142A600000000000000002434946010801000754CA0EA4000000000000008400000000000000000000000000000000300000FE00FE0000000000000000000000000000000000000000000000000000000000000000000040502035000000000000020D0000030D0000040C0000040D0000050C0000050D0000058C0000060C"),
+                decoder.decode(null, null, binary("33353733303030373030393233333644C20146B710C158DA009500B09F7700C054CA0EA454CA0EA403BE0BF6015D706B070000142A600000000000000002434946010801000754CA0EA4000000000000008400000000000000000000000000000000300000FE00FE0000000000000000000000000000000000000000000000000000000000000000000040502035000000000000020D0000030D0000040C0000040D0000050C0000050D0000058C0000060C")));
+
+        assertEquals(
+                binary("44C20146B710C158DA009500B09F7700C054CA0EA454CA0EA403BE0BF6015D706B070000142A600000000000000002434946010801000754CA0EA4000000000000008400000000000000000000000000000000300000FE00FE0000000000000000000000000000000000000000000000000000000000000000000040502035000000000000020D0000030D0000040C0000040D0000050C0000050D0000058C0000060C"),
+                decoder.decode(null, null, binary("44C20146B710C158DA009500B09F7700C054CA0EA454CA0EA403BE0BF6015D706B070000142A600000000000000002434946010801000754CA0EA4000000000000008400000000000000000000000000000000300000FE00FE0000000000000000000000000000000000000000000000000000000000000000000040502035000000000000020D0000030D0000040C0000040D0000050C0000050D0000058C0000060C")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AplicomProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/AplicomProtocolDecoderTest.java
new file mode 100644
index 000000000..0b4180bd0
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AplicomProtocolDecoderTest.java
@@ -0,0 +1,93 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class AplicomProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        AplicomProtocolDecoder decoder = new AplicomProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "434946010A0100075253F85F0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000FEEA0000FEE90000F0030000F0040000FEF10000FEF20000FEF50000FEFC0000FEC10000FEE500"));
+
+        verifyAttributes(decoder, binary(
+                "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"));
+
+        verifyAttributes(decoder, binary(
+                "44c30144f667ca8e6b003200b45f7700f05b6565e75b6565e6031f845100c6f0e70c00001483387c0fe60001000a263433233031303138373433303746230d0a"));
+
+        verifyAttributes(decoder, binary(
+                "44c30144f667ca8e6b002d00305f7700d45b307a9a5b307a97031f840a00c6f05b0600000083000000263433233031303138373433303746230d0a"));
+
+        verifyAttributes(decoder, binary(
+                "44c30144f667c4316500e903ffdfbc00f059aebeb659aebeb302e3f5860065fe32120000ae0000000e47000000000000000000000000000127cd0000014c00000000000000ff010a002900000000000000014542016d0001010090070e140144f667c4316559ae620402e3f7f300660714c0010d15ff0f3332373937313100000000000000000000002a01010737341d331fffcf0103020b8601060c0001a5860001a58600000000010b1001ca01ca7d007d007c7cffffffffffff010a240000ffff0000000100010001ffff0000ffffffffffffffffffffffffffff00000002ffff010c06fec6febffeec"));
+
+        verifyAttributes(decoder, binary(
+                "45c20144f667c06ff9005d0161ef17000104596da2dc4b10c0c01d99020d6c04004cba7a010d44463030303235333731363238303030000000000000000000000000000000000000000000000000000001010d44463030303235333731363238303030000000000000031c"));
+
+        verifyAttributes(decoder, binary(
+                "45c20144f667c07287008c01ffff6d01000059368963d0340a0616207d7f4b10c0c019e6000039d7000039d71f40ffff5001574442393036363035533132333435363700014142432d33343520202020202000011231303331373139343039303030303031000000000000000000000000000000000000000000000000000001011231303331373139343039303030303031000000000000005a"));
+
+        verifyAttributes(decoder, binary(
+                "46c30144f667c1711f00340007ff750058b8f77701037c06b8000000330033000000000b760000425e0100640000b3a90185d5823155000131070204000219641004"));
+
+        verifyAttributes(decoder, binary(
+                "46c30144f667c1711f00340007ff75005891601401025707b50236003b003b003500000a9300006bd50100640000a5250167d2f9034c01010107020400021a901004"));
+
+        verifyAttributes(decoder, binary(
+                "48C1014143B4493145004900203F6D014B5557C20003000015060110FF00C800000000000000003D01141E283C500100260404010200000000000000000000000000C8000000000000010200110019001E0064019003E8"));
+
+        verifyAttributes(decoder, binary(
+                "48c10144b9de54e6b2008700205f710a57d23ec957d23b8d00000000300d0106ff00000000000000000000000000000000000000000000000000000000000000010a141e28323c46505a646e7801000f020104ff000000000000000000010102000f020104ff000000000000000000010103000f020104ff000000000000000000010105000f020104ff0000000000000000000101"));
+
+        verifyAttributes(decoder, binary(
+                "45c20145931876ffb2007100ffff6d00000057c6dd1970230d087b1f7d7f0000d0c1000000003580000035801f40ffff5001574442393036363035533132333435363700014142432d333435202020202020000000000000000000000000000000000000000000000001123130343632343639373030303030303100000000"));
+
+        verifyAttributes(decoder, binary(
+                "45c20145931876ffb2007100ffff6d00000057c6dd9170250d087b1f7d7f0000d0c1000000003580000035801f40ffff5001574442393036363035533132333435363700014142432d333435202020202020000000000000000000000000000000000000000000000001123130343632343639373030303030303100000000"));
+
+        verifyAttributes(decoder, binary(
+                "45c20145931876ffb2007100ffff6d00000057c6de0970270d087b1f7d7f0000d0c1000000003580000035801f40ffff5001574442393036363035533132333435363700014142432d333435202020202020000000000000000000000000000000000000000000000001123130343632343639373030303030303100000000"));
+
+        verifyAttributes(decoder, binary(
+                "44c3014645e8ecff3c00ea03ffffbc00f457d68a6557d68a6303bb55fa018843da1100009881000000000000000000000000000000000000000000000000000000000000000000000000000000ff0056007600000000000000014542016d0001010095070e14014645e8ecff3c57d68a6403bb55fa018843dac0010d14ff050102030405060708090a0b0c0d0e0f10112a01010730343f3c1ff5cf01020700007d007d23010103022f2e01060c67452301efcdab8967452301010b10000000007d007d007d7dffffffffffff010a2400000000000000010000000000000000ffffffffffffffff00010001ffff00000000ffff010c02fec6"));
+
+        verifyPosition(decoder, binary(
+                "44c3014645e8e91b66002300a21f0b01f056d3e62856d3e626031f845f00c6ee440800000000000000000017bd1cb30000"));
+
+        verifyPosition(decoder, binary(
+                "44c3014645e8e91b66002300a21f0b00f056d3e64756d3e646031f845f00c6ee440800000000000000000017bd1cb30001"));
+
+        verifyPosition(decoder, binary(
+                "44c3014645e8e91b66001f00221f0b01f456ba1e0d56ba1e0b031f842200c6ef550c000000000017bd1cb30004"));
+
+        verifyAttributes(decoder, binary(
+                "44c3014645e8e9bada003e03fff7070055a4f24200000081000000000000000000000000000000000000000000000000000000000000000000000000000000ff00000001000000000000000044c3014645e8e9bada003e03fff77bff55a4f24300000081000000000000000000000000000000000000000000000000000000000000000000000000000000ff00300002000000000000000044c3014645e8e9bada003e03fff7690655a4f24500000081000000000000000000000000000000000000000000000000000000000000000000000000000000ff003000030000000000000000"));
+
+        verifyPosition(decoder, binary(
+                "44c3014645e8e9d29a002d0022ff6d00f455893b4d55893b4c027a7e1500189d710800009e0000000000000000000000023300000000000000009d"));
+        
+        verifyPosition(decoder, binary(
+                "44C20146B710C158DA002100B09F0700C054CA0EA254CA0E9C03BE0BF6015D7069070000142A600000000000000001"));
+
+        verifyPosition(decoder, binary(
+                "44C20143720729D6840043031fff7191C0450ef906450ef90603b20b8003b20b80066465b3870ce30f010ce30ce3003200001520000000030aa200003b13000000320300000bcb17acff0099000186a002"));
+
+        verifyPosition(decoder, binary(
+                "440129D684002b0700C0450ef906450ef90603b20b8003b20b80066465b3870ce30f010ce30ce300003b130300000bcb170a"));
+
+        verifyPosition(decoder, binary(
+                "44c3014645e8e9152e008900b09f7700f4558c07e8558c07e703be0bd8015d6faf0e0000003240000000000000000f4349460107010007558c07e70000000000000002d209df028f05fffe00000000000000002eff13fe11fe1a00011000000000000010ff11ff3cff11008c00080060f41b0043502015000000000000020d0000030d0000040c0000040d0000050c0000050d0000058c"));
+
+        verifyPosition(decoder, binary(
+                "44c20144563508385a009500b09f7700c0555ea99e555ea9b103bb569f01883ff50b00002a30f000000000000013074349460108010007555ea99e000000000000003f0000ae017605b3ff00000000010000006700d900d500000003000000000000006700d900d500000087002500c4ff0000435020150000000040512001000000000000020d0000030d0000040c0000040d0000050c0000050d0000058c0000060c"));
+
+        verifyPosition(decoder, binary(
+                "44C20146B710C158DA009500B09F7700C054CA0EA454CA0EA403BE0BF6015D706B070000142A600000000000000002434946010801000754CA0EA4000000000000008400000000000000000000000000000000300000FE00FE0000000000000000000000000000000000000000000000000000000000000000000040502035000000000000020D0000030D0000040C0000040D0000050C0000050D0000058C0000060C"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AppelloProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/AppelloProtocolDecoderTest.java
new file mode 100644
index 000000000..ac0858e82
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AppelloProtocolDecoderTest.java
@@ -0,0 +1,30 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class AppelloProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        AppelloProtocolDecoder decoder = new AppelloProtocolDecoder(null);
+
+        verifyAttributes(decoder, text(
+                "FOLLOWIT,867273024233699,UTCTIME,0.000000,0.000000,0,0,0,0,L,262:3:c703:4bf8:64:255|262:3:c703:9a18:45|262:3:c703:e838:33|262:3:c703:7190:20|262:3:c704:d896:17|,02,44,,31,,4.20,0,0,86/44/24,,,,26,02264DFF6E16:69|4C09D408554E:79|4C09D408554F:79|E0885DE705E5:81|E2885DE705E7:81|246511122CCC:83|,34925"));
+
+        verifyAttributes(decoder, text(
+                "FOLLOWIT,867273024233699,UTCTIME,0.000000,0.000000,0,0,0,0,L,262:3:c703:4bf8:64:1|262:3:c703:9a18:44|262:3:c703:e838:33|262:3:c703:7190:21|262:3:c704:d896:18|262:3:c703:71a6:13|262:3:c703:253d:13|,02,44,,22,,4.20,0,0,86/44/24,,,,30,02264DFF6E16:67|E0885DE705E5:87|B4A5EF284B94:88|E2885DE705E7:85|4C09D408554E:78|3481C4D71B13:43|,24033"));
+
+        verifyAttributes(decoder, text(
+                "FOLLOWIT,860719028336968,UTCTIME,-12.112660,-77.045189,0,0,3,-0,L,716,10,049C,2A47,23,,4.22,,53,999/00/00,,,,,,59826,"));
+
+        verifyPosition(decoder, text(
+                "FOLLOWIT,860719028336968,160211221959,-12.112660,-77.045258,1,0,6,116,F,716,17,4E85,050C,29,,4.22,,39,999/00/00,,,,,,46206,"));
+
+        verifyPosition(decoder, text(
+                "FOLLOWIT,359586019278139,130809160321,22.340218,114.030737,60,120,05,152,F,460,01,2533,720B,31,out,3.90,1,192,20/00/00,12.5,100%,80,45,1CFA68BB754E:60|2CFA68BB754E:100|3CFA68BB754E:100|4CFA68BB754E:100|5CFA68BB754E:100|,46672"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AppletProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/AppletProtocolDecoderTest.java
new file mode 100644
index 000000000..ad13c60f6
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AppletProtocolDecoderTest.java
@@ -0,0 +1,27 @@
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.DefaultHttpHeaders;
+import io.netty.handler.codec.http.HttpMethod;
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class AppletProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        AppletProtocolDecoder decoder = new AppletProtocolDecoder(null);
+
+        DefaultHttpHeaders headers = new DefaultHttpHeaders();
+
+        headers.add("HOST", "192.168.0.1:8080");
+        headers.add("X-Admin-Protocol", "globalplatform-remote-admin/1.0");
+        headers.add("X-Admin-From", "8943170080001406197F");
+        headers.add("User-Agent", "oma-scws-admin-agent/1.1");
+        headers.add("From", "8943170080001406197F");
+
+        verifyNull(decoder, request(HttpMethod.POST, "/pli?=", headers));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AquilaProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/AquilaProtocolDecoderTest.java
new file mode 100644
index 000000000..793b2c646
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AquilaProtocolDecoderTest.java
@@ -0,0 +1,79 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class AquilaProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecodeA() throws Exception {
+
+        AquilaProtocolDecoder decoder = new AquilaProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$$CLIENT_1ZF,170215089,20,18.462809,73.824188,170613182744,A,01,123456,*37"));
+
+        verifyPosition(decoder, text(
+                "$$CLIENT_1ZF,170215089,1,18.462809,73.824188,170613182744,A,19,0,0,256,4,4.860000,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,259,3731,*37"));
+
+        verifyPosition(decoder, text(
+                "$$CLIENT_1ZF,170222318,101,22.846016,75.949104,170321103506,A,0,0,244991,0,10,0.860000,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,12483,294,*3D"));
+
+        verifyNull(decoder, text(
+                "$$CLIENT_1ZF,170222318,15,2_00AP,70.35.195.185,5089,internet,T1:10 S,T2:1 M,Ad1:9164061023,Ad2:9164061023,TOF:0 S,,OSC:75 KM,OST:0 S,GPS:YES,Ignition:ON,*75"));
+
+        verifyPosition(decoder, text(
+                "$$CLIENT_1ZF,170222318,1,22.836912,75.942215,170321110736,A,11,12,247196,103,10,0.810000,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,13325,306,*36"));
+
+        verifyPosition(decoder, text(
+                "$$CLIENT_1ZF,130329214,1,12.962985,77.576484,140127165433,A,22,0,0,140,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1253,420,1,0,1,0,0,1,P(01:410104000102|05:410521|0C:410C0000|0D:410D65|21:4121161C),D(P0121|B2105),-895,745,-145,300,*26"));
+
+        verifyPosition(decoder, text(
+                "$$CLIENT_1NS,101010119,1,22.845943,75.949059,170202184000,A,27,0,0,120,31141,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,399,3709,0,0,0,0,0,0,P(01:|04:|05:|0B:|0C:|0D:|10:|1C:|21:|23:|30:|31:|1F:|11:|00:|00:|),D(),-89,44,-1062,0,*49"));
+
+        verifyPosition(decoder, text(
+                "$$CLIENT_1DT,151028368,1,19.108438,72.925308,160628154920,A,22,0,0,131,3503,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,*1D"));
+
+        verifyNull(decoder, text(
+                "$$CLIENT_1DT,160319372,1,28.549541,77.249802,160628140743,A,23,0,-65025,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,*0D"));
+
+        verifyPosition(decoder, text(
+                "$$SRINI_1MS,141214807,1,12.963515,77.533844,150925161628,A,27,0,8,0,68,0,0,0,0,0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,*43"));
+
+        verifyPosition(decoder, text(
+                "$$CLIENT_1ZF,130329214,1,12.962985,77.576484,140127165433,A,22,0,0,1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,*26"));
+
+        verifyPosition(decoder, text(
+                "$$CLIENT_1WP,141216511,3,12.963123,77.534012,150908163534,A,31,0,0,0,7,0,0,0,0,0,0,0,1,0,1,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,1,1,0,*28"));
+
+        verifyPosition(decoder, text(
+                "$$CLIENT_1WP,141216511,3,12.963212,77.533989,150908164041,V,31,0,0,0,8,0,0,0,0,0,0,0,1,0,1,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,1,1,0,*2A"));
+
+    }
+
+    @Test
+    public void testDecodeB() throws Exception {
+
+        AquilaProtocolDecoder decoder = new AquilaProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$Header,nliven,EMR,861693034634154,NM,09112017155133,A,12.976495,N,77.549713,E,906.0,0.0,23,G,KA01I2000,+919844098440*4B"));
+
+        verifyPosition(decoder, text(
+                "$EPB,iTriangle1,EMR,864495034445822,SP,03082018110730,A,22.829292,N,75.935806,E,543.0,0.0,0,G,KA01G1234,+9164061023*13"));
+
+        verifyPosition(decoder, text(
+                "$Header,iTriangle,1_37T02B0164MAIS_2,NR,1,L,864495034490141,KA01I2000,1,19042018,102926,22.846401,N,75.948952,E,0.0,311,5,578.0,3.80,3.67,AirTel,0,1,12.5,4.3,1,C,14,404,93,0456,16db,29,ebd8,0458,28,3843,18ab,25,072e,18ab,22,35da,0458,0000,00,031181,0.0,0.0,0,()*34"));
+
+        verifyPosition(decoder, text(
+                "$Header,nliven,1_37T02B0164MAIS,BR,6,L,861693034634154,KA01I2000,1,09112017,160702,12.976593,N,77.549782,E,25.1,344,15,911.0,1.04,0.68,Airtel,1,1,11.8,3.8,1,C,24,404,45,61b4,9ad9,31,9adb,61b4,35,ffff,0000,33,ffff,0000,31,ffff,0000,0001,00,000014,0.0,0.1,4,()*1E"));
+
+        verifyPosition(decoder, text(
+                "$Header,iTriangle,1_37T02B0164MAIS_2,NR,1,L,864495034490141,KA01I2000,1,31032018,122247,22.845999,N,75.949005,E,0.0,44,16,545.0,1.19,0.65,AirTel,1,1,12.0,4.3,0,C,13,404,93,0456,16db,27,16dd,0456,22,3843,18ab,19,ebd8,0458,14,072c,18ab,0101,00,003735,0.0,0.0,0,()*48"));
+
+        verifyNull(decoder, text(
+                "$Header,nliven,KA01I2000,861693034634154,1_37T02B0164MAIS,AIS140,12.976545,N,77.549759,E*50"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Ardi01ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Ardi01ProtocolDecoderTest.java
new file mode 100644
index 000000000..8498bb7f9
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Ardi01ProtocolDecoderTest.java
@@ -0,0 +1,22 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Ardi01ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Ardi01ProtocolDecoder decoder = new Ardi01ProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "013227003054776,20141010052719,24.4736042,56.8445807,110,289,40,7,5,78,-1"),
+                position("2014-10-10 05:27:19.000", true, 56.84458, 24.47360));
+
+        verifyPosition(decoder, text(
+                "013227003054776,20141010052719,24.4736042,56.8445807,110,289,40,7,5,78,-1"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/ArknavProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/ArknavProtocolDecoderTest.java
new file mode 100644
index 000000000..18901d9a6
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/ArknavProtocolDecoderTest.java
@@ -0,0 +1,25 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class ArknavProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        ArknavProtocolDecoder decoder = new ArknavProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "358266016278447,05*827,000,L001,V,4821.6584,N,01053.8650,E,000.0,000.0,00.0,08:46:04 17-03-16,9.5A,D7,0,79,0,,,,"),
+                position("2016-03-17 08:46:04.000", false, 48.36097, 10.89775));
+
+        verifyPosition(decoder, text(
+                "123456789012345,05*850,000,L001,A,2459.3640,N,12125.2958,E,000.0,224.8,00.8,07:47:26 09-09-05,9.00,D3,0,C4,1,,,,"));
+
+        verifyPosition(decoder, text(
+                "123456789012345,05*850,000,L001,A,2459.3640,N,12125.2958,E,000.0,224.8,00.8,07:47:26 09-09-05,9.00,D3,0,C4,1,,,00000000,"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/ArknavX8ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/ArknavX8ProtocolDecoderTest.java
new file mode 100644
index 000000000..dfe1435d1
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/ArknavX8ProtocolDecoderTest.java
@@ -0,0 +1,45 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class ArknavX8ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        ArknavX8ProtocolDecoder decoder = new ArknavX8ProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "351856045213782,241111"));
+
+        verifyPosition(decoder, text(
+                "1G,181213092101,A,0347.0756N,09842.7435E,0.0,183,1.1,11008000"));
+
+        verifyAttributes(decoder, text(
+                "2G,181213092101,08,4084.0,00.04,04.01,000396255.0"));
+
+        verifyNull(decoder, text(
+                "2R,090214235955,00,,00.04,03.76,001892024.9"));
+
+        verifyNull(decoder, text(
+                "351856040005407,240101"));
+
+        verifyPosition(decoder, text(
+                "1R,110509053244,A,2457.9141N,12126.3321E,220.0,315,10.0,00000000"));
+
+        verifyNull(decoder, text(
+                "2R,110509053244,837493,,998372,,,"));
+
+        verifyPosition(decoder, text(
+                "1G,110509053245,A,2457.9141N,12126.3192E,3.1,35,2.0,00000001"));
+
+        verifyPosition(decoder, text(
+                "1G,110509053246,A,2457.9121N,12126.3415E,2.0,288,1.7,00000000"));
+
+        verifyPosition(decoder, text(
+                "1M,110509053247,A,2457.9118N,12126.3522E,1.0,55,2.2,00000000"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/ArnaviProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/ArnaviProtocolDecoderTest.java
new file mode 100644
index 000000000..6b075facc
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/ArnaviProtocolDecoderTest.java
@@ -0,0 +1,42 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class ArnaviProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        ArnaviProtocolDecoder decoder = new ArnaviProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$AV,V4,999999,12487,2277,203,65534,0,0,193,65535,65535,65535,65535,1,13,80.0,56.1,200741,5950.6773N,03029.1043E,300.0,360.0,121012,65535,65535,65535,SF*6E"));
+
+        verifyNull(decoder, text(
+                "$AV,V3DI,85164,20707,-1,19,0008C56A,000879AC,0C000002,863071013041618,89997077111301204297,*0B"));
+
+        verifyNull(decoder, text(
+                "$AV,V6SD,85164,20708,-1,3,6,37,33,*52"));
+
+        verifyAttributes(decoder, text(
+                "$AV,V4,85164,20709,1148,418,-1,0,1,192,0,0,0,0,0,0,,,000023,0000.0000N,00000.0000E,0.0,0.0,060180,0,0,32767,*4F"));
+
+        verifyNull(decoder, text(
+                "$AV,V3GSMINFO,85164,-1,20450,KMOBILE,1,2,1,23,0,40101,cc3,1,ce19,401,16,65304,5613,72,,SF*7F"));
+
+        verifyAttributes(decoder, text(
+                "$AV,V4,85164,20451,1146,418,-1,1,1,192,0,0,0,0,0,0,,,104340,0000.0000N,00000.0000E,0.0,0.0,060219,11,0,32767,,SF*47"));
+
+        verifyNull(decoder, text(
+                "$AV,V6SD,85164,20452,-1,3,3,5,6769,,SF*5D"));
+
+        verifyPosition(decoder, text(
+                "$AV,V2,32768,12487,2277,203,-1,0,0,193,0,0,1,13,200741,5950.6773N,03029.1043E,0.0,0.0,121012,*6E"));
+
+        verifyPosition(decoder, text(
+                "$AV,V3,999999,12487,2277,203,65534,0,0,193,65535,65535,65535,65535,1,13,200741,5950.6773N,03029.1043E,300.0,360.0,121012,65535,65535,65535,SF*6E"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AstraProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/AstraProtocolDecoderTest.java
new file mode 100644
index 000000000..453ec9da5
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AstraProtocolDecoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class AstraProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        AstraProtocolDecoder decoder = new AstraProtocolDecoder(null);
+
+        verifyPositions(decoder, binary(
+                "4b00700529c0c265976b8202cba9ff00676d864554a9c30000000020073401006436000300030008000000000000a0000100001920c43d00009600428302cba9ff00676d864554aa3e000000002007240100643b000300020008000000000000b0000100001920c43d00009600420f0e"));
+
+        verifyPositions(decoder, binary(
+                "4b00320524c1da58769e6d0322617effe874024453065600a800000100080000643e0000000000000000000000069500e7bb"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/At2000FrameDecoderTest.java b/src/test/java/org/traccar/protocol/At2000FrameDecoderTest.java
new file mode 100644
index 000000000..c5829d588
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/At2000FrameDecoderTest.java
@@ -0,0 +1,23 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class At2000FrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        At2000FrameDecoder decoder = new At2000FrameDecoder();
+
+        verifyFrame(
+                binary("01012f00000000000000000000000000003335363137333036343430373439320fad981997ae8e031fe10c0ea7641903ca32c0331df467233d2a9cd886fbeef8"),
+                decoder.decode(null, null, binary("01012f00000000000000000000000000003335363137333036343430373439320fad981997ae8e031fe10c0ea7641903ca32c0331df467233d2a9cd886fbeef8")));
+
+        verifyFrame(
+                binary("893f0000000000000000000000000000e048b1a31deba3f5dbe8877f574877e6ed4d022b6611a10d80dfc4c0c11fa8aacf4a9de61528327e2b66843dd9c5d3a7cc9ee1d9c71a34bb482145d88b4fda3e"),
+                decoder.decode(null, null, binary("893f0000000000000000000000000000e048b1a31deba3f5dbe8877f574877e6ed4d022b6611a10d80dfc4c0c11fa8aacf4a9de61528327e2b66843dd9c5d3a7cc9ee1d9c71a34bb482145d88b4fda3e")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/At2000ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/At2000ProtocolDecoderTest.java
new file mode 100644
index 000000000..9e2f180d2
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/At2000ProtocolDecoderTest.java
@@ -0,0 +1,59 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assume.assumeTrue;
+
+public class At2000ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        assumeTrue(Boolean.parseBoolean(System.getenv("CI")));
+
+        At2000ProtocolDecoder decoder;
+
+        decoder = new At2000ProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "01012f00000000000000000000000000003335373435343037313632373539388b57ec3a6ec7e3310a1ceb0a70fd751b8f2e7be6df1d6dcd80129f66fff0ea1c"));
+
+        verifyNull(decoder, binary(
+                "89000000000000000000000000000000"));
+
+        decoder = new At2000ProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "01012f0000000000000000000000000000333537343534303731363036313936ddf189075add9a32d97b54073025963e65849a3a59940d05fd8db655fc84bc6d"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+        decoder = new At2000ProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "01012f000000000000000000000000000033353734353430373136303631393637f5441a9862260117858237fe3160388490f0df7d46c09112ee087235a92101"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+        decoder = new At2000ProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "01012f0000000000000000000000000000333537343534303731363035353033dd529a1eb5df9f3b6d320b38250e03306692957e8c2127d8e381a717f639b4c9"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+        decoder = new At2000ProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "01012f00000000000000000000000000003335363137333036343430373439320fad981997ae8e031fe10c0ea7641903ca32c0331df467233d2a9cd886fbeef8"));
+
+        verifyPositions(decoder, binary(
+                "893f0000000000000000000000000000e048b1a31deba3f5dbe8877f574877e6ed4d022b6611a10d80dfc4c0c11fa8aacf4a9de61528327e2b66843dd9c5d3a7cc9ee1d9c71a34bb482145d88b4fda3e"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AtrackFrameDecoderTest.java b/src/test/java/org/traccar/protocol/AtrackFrameDecoderTest.java
new file mode 100644
index 000000000..3a26bb7a7
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AtrackFrameDecoderTest.java
@@ -0,0 +1,39 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class AtrackFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        AtrackFrameDecoder decoder = new AtrackFrameDecoder();
+
+        verifyFrame(
+                binary("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"),
+                decoder.decode(null, null, binary("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")));
+
+        verifyFrame(
+                binary("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"),
+                decoder.decode(null, null, binary("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")));
+
+        verifyFrame(
+                binary("40502c373542332c3132302c37393737392c3335383930313034383039313535342c32303138303431323134323531342c32303138303431323134323531342c32303138303431333030303635352c31363432333338392c34383137383730302c3130382c322c362e352c392c302c302c302c302c302c323030302c323030302c1a0d0a"),
+                decoder.decode(null, null, binary("40502c373542332c3132302c37393737392c3335383930313034383039313535342c32303138303431323134323531342c32303138303431323134323531342c32303138303431333030303635352c31363432333338392c34383137383730302c3130382c322c362e352c392c302c302c302c302c302c323030302c323030302c1a0d0a")));
+
+        verifyFrame(
+                binary("244F4B0D0A"),
+                decoder.decode(null, null, binary("244F4B0D0A")));
+
+        verifyFrame(
+                binary("fe0200014104d8f196820001"),
+                decoder.decode(null, null, binary("fe0200014104d8f196820001")));
+
+        verifyFrame(
+                binary("40501e58003301e000014104d8f19682525ecd5d525ee344525ee35effc88815026ab4d70000020000104403de01000b0000000007d007d000"),
+                decoder.decode(null, null, binary("40501e58003301e000014104d8f19682525ecd5d525ee344525ee35effc88815026ab4d70000020000104403de01000b0000000007d007d000")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AtrackProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/AtrackProtocolDecoderTest.java
new file mode 100644
index 000000000..3a9382086
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AtrackProtocolDecoderTest.java
@@ -0,0 +1,99 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class AtrackProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        AtrackProtocolDecoder decoder = new AtrackProtocolDecoder(null);
+
+        verifyPositions(decoder, buffer(
+                "@P,3A34,146,41431,353816057242284,20180622015809,20180622015809,20180622015809,9720689,4014230,61,2,0,20,1,0,0,0,0,2000,2000,12160,42,624,002,20009,20014,\r\n"));
+
+        verifyPositions(decoder, buffer(
+                "@P,1126,121,104547,358901048091554,20180412143513,20180412143514,20180413060000,16423389,48178700,108,2,6.5,9,0,0,0,0,0,2000,2000,\r\n"));
+
+        verifyPositions(decoder, buffer(
+                "@P,434E,124,104655,358901048091554,20180412143706,20180412143706,20180413060107,16423389,48178700,108,121,6.5,10,0,0,0,0,0,2000,2000,\r\n"));
+
+        verifyPositions(decoder, binary(
+                "4050b5ed004a2523000310c83713f8c05a88b43e5a88b43f5a88b43f021e0ad5fffdc0a800f3020003059100080000000000000007d007d046554c533a463d3230393120743d3137204e3d3039303100"));
+
+        verifyAttributes(decoder, buffer(
+                "$INFO=358683066267395,AX7,Rev.0.61 Build.1624,358683066267395,466924131626767,89886920041316267670,144,0,9,1,12,1,0\r\n"));
+
+        decoder.setLongDate(true);
+
+        verifyPositions(decoder, binary(
+                "0203b494003c00eb00014104d8dd3a3e07de011b0b1f0307de011b0b1f0307de011b0b1f0300307f28030574d30000020000000600160100020000000007d007d000"));
+
+        decoder.setLongDate(false);
+
+        decoder.setCustom(true);
+
+        verifyPositions(decoder, buffer(
+                "@P,9493,402,143,356961075931165,1546830150,1546830151,1546830151,-88429209,44271154,54,10,0,10,1,0,0,0,1858AE010000,2000,2000,\u001A,%CI%FL%ML%VN%PD%FC%EL%ET%AT%MF%MV%BV%DT%GN%GV%ME%RL%RP%SA%SM%TR%IA%MP,0,0,2T1KR32E28C706185,0,1,0,7,251,89,118,41,0,00A5001A040800A5001A040B00A5001A040C00A5001A040900A4001C040D00A50019040900A60019040900A4001B040B00A5001A040900A7001A040E\u001A,008CFE7C03C4\u001A,356961075931165,0,0,12,0,18,5,0\n"));
+
+        verifyPositions(decoder, buffer(
+                "@P,FD34,720,12256,357520076794151,1535445349,1535445354,1535500603,106784149,-6283086,105,2,138,0,3,0,0,0,,2000,2000,,%CI%TR%MV%BV%AT%SA%ET%GQ%GS%PC%RP%OD%AV1%XS%VS,0,0,0,0,0,0,0,0,1011677,0,138,0,0,0\r\n",
+                "1535445376,1535445374,1535500603,106783763,-6282981,105,101,138,6,2,0,0,0,,2000,2000,,%CI%TR%MV%BV%AT%SA%ET%GQ%GS%PC%RP%OD%AV1%XS%VS,0,141,41,60,12,0,0,7,1011677,0,138,0,0,0\r\n",
+                "1535445380,1535445378,1535500603,106783763,-6282981,105,103,138,6,2,0,0,0,,2000,2000,,%CI%TR%MV%BV%AT%SA%ET%GQ%GS%PC%RP%OD%AV1%XS%VS,0,135,41,61,12,0,0,9,1011677,0,138,0,0,0\r\n",
+                "1535445415,1535445415,1535500603,106783763,-6282981,105,2,138,7,2,0,0,0,,2000,2000,,%CI%TR%MV%BV%AT%SA%ET%GQ%GS%PC%RP%OD%AV1%XS%VS,0,135,41,61,12,0,21,10,1011677,0,138,0,0,0\r\n"));
+
+        verifyPositions(decoder, buffer(
+                "@P,0EBB,687,1917,357298070426498,1534718280,1534718279,1534739774,-88643875,44210148,270,2,57128,6,1,130,0,0,,2000,2000,,%CI%GQ%GS%CN%CE%MV%SA,5,10,310260,7888593,137,16\r\n",
+                "1534718283,1534718283,1534739774,-88645243,44210145,269,2,57129,6,1,129,0,0,,2000,2000,,%CI%GQ%GS%CN%CE%MV%SA,5,10,310260,7888593,137,16\r\n",
+                "1534718286,1534718285,1534739774,-88646581,44210136,269,2,57130,6,1,127,0,0,,2000,2000,,%CI%GQ%GS%CN%CE%MV%SA,99,10,0,0,137,16\r\n",
+                "1534718289,1534718288,1534739774,-88647911,44210123,269,2,57131,6,1,127,0,0,,2000,2000,,%CI%GQ%GS%CN%CE%MV%SA,99,10,0,0,137,16\r\n",
+                "1534718292,1534718291,1534739774,-88649229,44210111,269,2,57132,6,1,124,0,0,,2000,2000,,%CI%GQ%GS%CN%CE%MV%SA,99,10,0,0,136,16\r\n"));
+
+        verifyPositions(decoder, binary(
+                "4050b63b02c401af000144a77a21281d5b79d8ef5b79d8ef5b79d8f0fab84831029f35580056020003144d00080100130000000007d007d00025434925434525434e25475125475325464c254d4c25564e25504425464325454c254554254344254154254d46254d5625425625434d25445425474c25474e254756254c43254d4525524c25525025534125534d255452254941254d5000000000000004bbf41f0900003254314b5233324532384337303631383500000000000053005f3839303132363038383132313532343737353900000000fd078e0085002900011a2e3da1882700687474703a2f2f6d6170732e676f6f676c652e636f6d2f6d6170733f713d34332e3938383331322c2d38382e35383631383920000013ff4e04190023ff13041100a3ffdc0402009affde03fc00a4ffe3040c0093ffab03ee004dffbb04130012ff7a04180010ff6e04100037ff4d0402ffd8000c04140000000144a77a21281d0009470c00131b2b005b79d8f05b79d8f05b79d8f0fab8488e029f356f0043020003144d00080100170000000007d007d00025434925434525434e25475125475325464c254d4c25564e25504425464325454c254554254344254154254d46254d5625425625434d25445425474c25474e254756254c43254d4525524c25525025534125534d255452254941254d5000000000000004bbf41f0900003254314b5233324532384337303631383500000000000052005f3839303132363038383132313532343737353900000000fd09190085002900011a2e3da1882700687474703a2f2f6d6170732e676f6f676c652e636f6d2f6d6170733f713d34332e3938383333352c2d38382e35383630393820000013ff4e04190023ff1304110017ff0c0424000cff30041a00a4ffe3040c0093ffab03ee004dffbb04130012ff7a04180010ff6e04100037ff4d0402ffd8000c04140000000144a77a21281d0009470c00171c2b00"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+        verifyPositions(decoder, buffer(
+                "@P,6254,235,989,356961075931165,1534381563,1534381564,1534381564,-88429188,44271225,70,2,200563,8,1,0,0,0,,2000,2000,,%CI%CE%CN%GQ%GS%FL%ML%VN%PD%FC%EL%ET%CD%AT%MF%MV,0,310260,18,9,0,0,2T1KR32E28C706185,0,0,0,54,8901260881215247759,252,489,123"));
+
+        verifyPositions(decoder, buffer(
+                "@P,27A6,663,707,356961075931165,1534211298,1534211297,1534211437,-88429190,44271135,288,2,200235,8,1,0,0,0,,2000,2000,,%CI%CE%CN%GQ%GS%FL%ML%VN%PD%FC%EL%ET%CD%AT%MF%MV,0,310260,17,9,0,0,2T1KR32E28C706185,0,0,0,80,8901260881215247759,251,59,124\r\n",
+                "1534211353,1534211357,1534211437,-88429190,44271135,288,2,200235,7,1,0,0,0,,2000,2000,,%CI%CE%CN%GQ%GS%FL%ML%VN%PD%FC%EL%ET%CD%AT%MF%MV,0,310260,17,2,0,0,2T1KR32E28C706185,0,0,0,79,8901260881215247759,251,60,124\r\n",
+                "1534211417,1534211417,1534211437,-88429190,44271135,288,2,200235,7,1,0,0,0,,2000,2000,,%CI%CE%CN%GQ%GS%FL%ML%VN%PD%FC%EL%ET%CD%AT%MF%MV,0,310260,17,2,0,0,2T1KR32E28C706185,0,0,0,78,8901260881215247759,251,56,124\r\n"));
+
+        verifyPositions(decoder, buffer(
+                "@P,CA4B,122,1,358683064932578,1533633976,1533633975,1533633975,121562641,25082649,72,0,1638,15,0,0,1,0,,2000,2000,,%CI%MV%BV,143,0\r\n"));
+
+        verifyPositions(decoder, binary(
+                "405025e30096eb730001452efaf6a7d6562fe4f8562fe4f7562fe52c02a006d902273f810064650000e0f5000a0100000000000007d007d000254349255341254d5625425625475125415400090083002a1a000001a8562fe4f8562fe4f7562fe52c02a006d902273f810064020000e0f5000a0100000000000007d007d000254349255341254d5625425625475125415400090083002a1a000001a8"));
+
+        decoder.setCustom(false);
+
+        verifyNull(decoder, binary(
+                "fe0200014104d8f196820001"));
+
+        verifyPositions(decoder, binary(
+                "40503835003300070001441c3d8ed1c400000000000000c9000000c900000000000000000000020000000003de0100000000000007d007d000"),
+                position("1970-01-01 00:00:00.000", true, 0.00000, 0.00000));
+
+        verifyPositions(decoder, binary(
+                "4050993f005c000200014104d8f19682525666c252568c3c52568c63ffc8338402698885000002000009cf03de0100000000000007d007d000525666c252568c5a52568c63ffc8338402698885000002000009cf03de0100000000000007d007d000"));
+
+        verifyPositions(decoder, binary(
+                "40501e58003301e000014104d8f19682525ecd5d525ee344525ee35effc88815026ab4d70000020000104403de01000b0000000007d007d000"));
+
+        verifyPositions(decoder, binary(
+                "40501e58003301e000014104d8f19682525ecd5d525ee344525ee35effc88815026ab4d70000020000104403de01000b0000000007d007d000000000000000"));
+
+        verifyAttributes(decoder, buffer(
+                "$OK\r\n"));
+
+        verifyAttributes(decoder, buffer(
+                "$ERROR=101\r\n"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AuroProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/AuroProtocolDecoderTest.java
new file mode 100644
index 000000000..aeea48967
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AuroProtocolDecoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class AuroProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        AuroProtocolDecoder decoder = new AuroProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "M0028T0000816398975I357325031465123E00001W*****110620150437000068DA#RD01DA240000000001+100408425+013756121100620152137231112240330004400"));
+
+        verifyPosition(decoder, text(
+                "M0029T0000816398975I357325031465123E00001W*****110620150439000068DA#RD01DA240000000001+100407886+013755936100620152138221952123100003400"));
+
+        verifyPosition(decoder, text(
+                "M0030T0000816398975I357325031465123E00001W*****110620150441000068DA#RD01DA240000000000+100408391+013756125100620152140102362238320034400"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AustinNbProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/AustinNbProtocolDecoderTest.java
new file mode 100644
index 000000000..fa8f3a071
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AustinNbProtocolDecoderTest.java
@@ -0,0 +1,33 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class AustinNbProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        AustinNbProtocolDecoder decoder = new AustinNbProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "48666666666;2017-01-01 16:31:01;52,1133308410645;21,1000003814697;310;120;2292;1;ORANGE"));
+
+        verifyPosition(decoder, text(
+                "48666666666;2017-01-01 16:55:00;52,1636123657227;21,0827789306641;0;90;4000;0;ORANGE"));
+
+        verifyPosition(decoder, text(
+                "48666666666;2017-01-01 17:32:01;52,1711120605469;21,0866680145264;70;90;1199;0;ORANGE"));
+
+        verifyPosition(decoder, text(
+                "48601601601;2017-01-01 16:31:01;52,1133308410645;21,1000003814697;310;360;2292;1;ORANGE"));
+
+        verifyPosition(decoder, text(
+                "48601601601;2017-01-01 16:55:00;52,1636123657227;21,0827789306641;0;360;4000;0;ORANGE"));
+
+        verifyPosition(decoder, text(
+                "48601601601;2017-01-01 17:32:01;52,1711120605469;21,0866680145264;70;360;1199;0;ORANGE"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AutoFonProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/AutoFonProtocolDecoderTest.java
new file mode 100644
index 000000000..9e17b437f
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AutoFonProtocolDecoderTest.java
@@ -0,0 +1,41 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+
+public class AutoFonProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        AutoFonProtocolDecoder decoder = new AutoFonProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "10556103592310314825728F"));
+
+        verifyPosition(decoder, binary(
+                "02080000251848470afa010262daa690013aa4046da83745f8812560df010001126a"));
+
+        verifyPosition(decoder, binary(
+                "111E00000000000000000100007101010B0C020302010B0C0005A053FFFFFFFF02010B0C00276047FFFFFFFF1F5600FA000176F218C7850C0B0B0C203A033DBD46035783EF009E00320014FFFF45"));
+
+        //verifyPosition(decoder, binary(
+        //        "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"));
+
+        verifyNull(decoder, binary(
+                "41035151305289931441139602662095148807"));
+
+        verifyNull(decoder, binary(
+                "41032125656985547543619173484002123481"));
+
+        verifyPosition(decoder, binary(
+                "023E00001E004D411EFA01772F185285009C48041F1E366C2961380F26B10B00911C"),
+                position("2010-01-27 04:00:08.000", true, 54.73838, 56.10343));
+
+        verifyPosition(decoder, binary(
+                "023E00001E004D411EFA01772F185285009C48041F1E366C2961380F26B10B00911C"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AutoGradeProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/AutoGradeProtocolDecoderTest.java
new file mode 100644
index 000000000..f71fcd8eb
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AutoGradeProtocolDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class AutoGradeProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        AutoGradeProtocolDecoder decoder = new AutoGradeProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "(000000001637868324027912356171116A2250.7611N07556.9425E000.9024427197.36\u008eA0000B0000C0000D0000E0000K0000L0000M0000N0000O0000)"));
+
+        verifyPosition(decoder, text(
+                "(000000007322865733022629240170415A1001.1971N07618.1375E0.000145312128.59?A0024B0024C0000D0000E0000K0000L0000M0000N0000O0000"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AutoTrackProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/AutoTrackProtocolDecoderTest.java
new file mode 100644
index 000000000..5daafcc40
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AutoTrackProtocolDecoderTest.java
@@ -0,0 +1,18 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class AutoTrackProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        AutoTrackProtocolDecoder decoder = new AutoTrackProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "f1f1f1f1330c00201007090006de7200000000daa3"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/AvemaProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/AvemaProtocolDecoderTest.java
new file mode 100644
index 000000000..d3be0b6d6
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/AvemaProtocolDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class AvemaProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        AvemaProtocolDecoder decoder = new AvemaProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "8,20180927150956,19.154864,49.124862,7,56,0,12,3,0.0,0,0.02,14.01,0,0,26,0,219-2,65534,10255884,0.01"));
+
+        verifyPosition(decoder, text(
+                "1130048939,20120224000129,121.447487,25.168025,0,0,0,0,3,0.0,1,0.02V,14.88V,0,1,24,4,46608,F8BC,F9AD,CID0000028"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Avl301ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Avl301ProtocolDecoderTest.java
new file mode 100644
index 000000000..0972e3fd4
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Avl301ProtocolDecoderTest.java
@@ -0,0 +1,25 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+
+public class Avl301ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Avl301ProtocolDecoder decoder = new Avl301ProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "244c0f086058500087335500010d0a"));
+
+        verifyNull(decoder, binary(
+                "24480d1001c3065c0d00010d0a"));
+
+        verifyPosition(decoder, binary(
+                "24242c0f041710001d0e060146944904ff4ac40000148f0651044b001a081001be06590daa00000108a30d0a"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/BceProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/BceProtocolDecoderTest.java
new file mode 100644
index 000000000..400ba7e12
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/BceProtocolDecoderTest.java
@@ -0,0 +1,39 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class BceProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        BceProtocolDecoder decoder = new BceProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "3ab90b71bc1503000300c10bff11"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+        verifyPositions(decoder, binary(
+                "be76619c834601004200a0003fd769c568ffc3db0079161d420683a9414918b1150000000000d102660167040000000000009f06357f0000a401042ea415e10232000000000000000000000051"));
+
+        verifyPositions(decoder, binary(
+                "be76619c834601004200a0003ff76cc568ffc3db00bd151d423c8ca9410a18af150000000000d1023a0160040000000000009f06427f0000a401042ea416e1003e00000000000000000000009a"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+        verifyPositions(decoder, binary(
+                "2d41abfa2e4501004e02a5a0068609f96a009106260af96a00a006260af96a009106960af96a00a306a60af96a008f06b60af96a009106960cf96a00a03e0715f96affc300804000e6a23a4230ccc441001f47850200000000a0000000bd6542651a110d004b1000000000a401045a56bf4d02480000000000000000061623f96a00a0062623f96a00913ea728f96affc300804000e6a23a4230ccc441001f7f850200000000a0000000bd6542651a110d004a1000000000a401045a56bf4d02480000000000000000069639f96a00a006a639f96a00913e373cf96affc300804000e6a23a4230ccc441001f7f850200000000a0000000ad6534651a110d004a1000000000a401045a56bf4d024800000000000000003ed74ff96affc300804000e6a23a4230ccc441001f7f850200000000a0000000ad6534651a111b004a1000000000a401045a56bf4d01480000000000000000061650f96a00a0062650f96a00913e6763f96affc300804000e6a23a4230ccc441001f7f850200000000a0000000ad6534651a110d004a1000000000a401045a56bf4d01480000000000000000069666f96a00a006a666f96a00913e0777f96affc300804000e6a23a4230ccc441001f7f850200000000a0000000ad6534651a110d004a1000000000a401045a56bf4d0148000000000000000006067df96a00a006167df96a0091063687f96a00a3064687f96a008f065687f96a0091063689f96a00a03e978af96affc300804000e6a23a4230ccc441001f87850200000000a0000000ad6527651a110d004a1000000000a401045a56bf4d024800000000000000000e"));
+        
+        verifyPositions(decoder, binary(
+                "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"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/BceProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/BceProtocolEncoderTest.java
new file mode 100644
index 000000000..bdcc1f9e8
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/BceProtocolEncoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+public class BceProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        BceProtocolEncoder encoder = new BceProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_OUTPUT_CONTROL);
+        command.set(Command.KEY_INDEX, 1);
+        command.set(Command.KEY_DATA, "1");
+
+        verifyCommand(encoder, command, binary("79df0d86487000000600410aff00550048"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/BlackKiteProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/BlackKiteProtocolDecoderTest.java
new file mode 100644
index 000000000..9a24ece1f
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/BlackKiteProtocolDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class BlackKiteProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        BlackKiteProtocolDecoder decoder = new BlackKiteProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "01150003313131313131313131313131313131209836055605BA"));
+        
+        verifyPositions(decoder, binary(
+                "0136000331313131313131313131313131313120523905563000010000000100000033000000003400004000004500004600005000005100009F76"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/BoxProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/BoxProtocolDecoderTest.java
new file mode 100644
index 000000000..d661a10f2
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/BoxProtocolDecoderTest.java
@@ -0,0 +1,67 @@
+package org.traccar.protocol;
+
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class BoxProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        BoxProtocolDecoder decoder = new BoxProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "H,BT,358281002435893,081028142432,F5813D19,6D6E6DC2"));
+        
+        verifyNull(decoder, text(
+                "H,BT,N878123,080415081234,D63E6DD9,6D6E6DC2,8944100300825505377"));
+
+        verifyPosition(decoder, text(
+                "L,190227043304,G,25.68773,48.59788,71,53,261.42,1,23;A,0.03;D,0.06;I,0"));
+
+        verifyPosition(decoder, text(
+                "L,081028142429,G,52.51084,-1.70849,0,170,0,1,0"));
+
+        verifyPosition(decoder, text(
+                "L,081028142432,G,52.51081,-1.70849,0,203,0,16,0"));
+
+        verifyNull(decoder, text(
+                "L,080528112501,AI1,145.56"));
+
+        verifyNull(decoder, text(
+                "E,1"));
+
+        verifyPosition(decoder, text(
+                "L,150728150130,G,24.68312,46.67526,0,140,0,3,20;A,0;D,0;I,0"));
+
+        verifyPosition(decoder, text(
+                "L,150728155815,G,24.68311,46.67528,0,140,0,6,21;A,0;D,0;I,0"));
+
+        verifyPosition(decoder, text(
+                "L,150728155833,G,24.68311,46.67528,11,140,0,52,23;A,0.79;D,0;I,0"));
+
+        verifyPosition(decoder, text(
+                "L,150728155934,G,24.68396,46.67489,0,282,0.12,1,21;A,1.27;D,1.23;I,0"));
+
+        verifyPosition(decoder, text(
+                "L,150728160033,G,24.68414,46.67485,0,282,0.12,1,21;A,0;D,0;I,0"));
+
+        verifyPosition(decoder, text(
+                "L,150728160133,G,24.68388,46.675,0,282,0.12,1,21;A,0;D,0;I,0"));
+
+        verifyPosition(decoder, text(
+                "L,150728160233,G,24.68377,46.67501,0,282,0.12,1,21;A,0;D,0;I,0"));
+
+        verifyPosition(decoder, text(
+                "L,150728160333,G,24.684,46.67488,0,282,0.12,1,21;A,0;D,0;I,0"));
+
+        verifyPosition(decoder, text(
+                "L,150728155855,G,24.68413,46.67482,0,282,0.14,53,21;A,0;D,0;I,0"));
+
+        verifyPosition(decoder, text(
+                "L,150728160400,G,24.68413,46.67482,0,282,0.14,7,20;A,0;D,0;I,0;END,25,326,150728155814"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/C2stekProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/C2stekProtocolDecoderTest.java
new file mode 100644
index 000000000..9f841fb8c
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/C2stekProtocolDecoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class C2stekProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        C2stekProtocolDecoder decoder = new C2stekProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "PA$863083038046613$D#181123#162850#1#+37.92684#+23.75933#0.62#200.1#0.0#3768#000#9#00#sz-w1001#B0907839$AP"));
+
+        verifyPosition(decoder, text(
+                "PA$353990030327618$D#091117#020928#1#22.537222#114.020948#0.00#0.0#42.1#4183#011#1#101#Wsz-wl001#B0101940#C+3.0,-5.0,+2.0$AP"));
+
+        verifyNull(decoder, text(
+                "PA$863083030602124$20$AP"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/CalAmpProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/CalAmpProtocolDecoderTest.java
new file mode 100644
index 000000000..5ed3f5dc8
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/CalAmpProtocolDecoderTest.java
@@ -0,0 +1,54 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class CalAmpProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        CalAmpProtocolDecoder decoder = new CalAmpProtocolDecoder(null);
+
+        verifyPosition(decoder, binary(
+                "83051633033459010101028afd59ae7c1459ae7c140b06bbce2c01520e0000d916000001b900450900005affa50f091f00260d040000000f24000001b90000000000003714"));
+
+        verifyPosition(decoder, binary(
+                "83092701131797081078220107010200dc583d4d3f583d4d3f19c70502cd1d512d00005f180000008500ec0800101eff980f090100313102000000000000000000"));
+
+        verifyPosition(decoder, binary(
+                "8305133303910501010102004557E5AB2457E3B3E01FD828DBFE9E3465000028C90000004201310704001EFFA12F0B22081BCA05000000000000000F87000E8E2F00EA029E0000082D"));
+
+        verifyPosition(decoder, binary(
+                "8305313301481601010102045557ea2eba57ea2eba1ebf06db005f2e5e0000220c00000000000006200000ff8f000a00000bca06000000000000000f1b000f35ef00ea02900000087000000060"));
+
+        verifyPosition(decoder, binary(
+                "8305454205067001010102008157a9bddc57a96aaa17cdb98fccc1a457000056ac00000000000007250000ff8f000e00082711570000000000ffff101b00003148000010680000000000000000000000050000000000000000000005b0000000000000289600000000000000000000069b00000000000008e400000000000000000000000000000003000000010000070f"));
+
+        verifyPosition(decoder, binary(
+                "83052132052924010101020001575c590300000000000000000000000000000000000000000000002c0000ff8f0000030801010000"));
+        
+        verifyPosition(decoder, binary(
+                "830543321494860101010a0080560b5a5e0eadd0291becf3c500f005090f1f3305000003010040c0a600000000000000008b12a102"));
+
+        verifyPosition(decoder, binary(
+                "830543321494860101010a0c215608b6680ead5ada1bed88d300000049801f000500000300003cf33200000000000000008b0ce101"));
+        
+        verifyNull(decoder, binary(
+                "830545321041830101010300010000333862000023c301000000004532104183ffffff353816051610691f420040163953294fffffffffffffffff8996604211639032949f4f54413a317c303b302c317c343b302c34004f5441535441543a302c302c302c302c302c222200564255533a342c322e302e302c343533323130343138332c5630312e30332e30312e34302c5630312e30332e30312e33312c2c0056494e2d494e464f3a56494e3d31464d5a5537324539355a4137303032362c4445562d5245474e3d55532c535256522d5245474e3d555300"));
+        
+        verifyPosition(decoder, binary(
+                "8308353301059723580f01020102088952d994c352d994c4134fa767c4c482e20000c12700000d29006e1002019affc90f061d00060c0000"));
+        
+        verifyPosition(decoder, binary(
+                "8308355233050116134f01020102445652d993e152d993e1124c728cc68f0647000023c00000000000000e02019affc90f071c0015020000"));
+        
+        verifyPosition(decoder, binary(
+                "830545420185450101010200075517fb335516c5c40fb1aea4cf4cbf250000000000000000008900260015ffb10f001108110a0000"));
+        
+        verifyPosition(decoder, binary(
+                "830543321494750101010A00085492798A0EC4F9E71BDA3B81005600040F1F33050000030000000076000000000000000000000000"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/CarTrackProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/CarTrackProtocolDecoderTest.java
new file mode 100644
index 000000000..c8db07ee3
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/CarTrackProtocolDecoderTest.java
@@ -0,0 +1,32 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class CarTrackProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        CarTrackProtocolDecoder decoder = new CarTrackProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "$$020040????????&A0000"));
+
+        verifyPosition(decoder, text(
+                "$$020040????????&A9955&B011939.000,A,4436.3804,N,02606.9434,E,0.00,0.00,190317,,,A*64|0.9|&C0100000000&D01830=?6&E00000001&Y00000000"));
+
+        verifyPosition(decoder, text(
+                "$$2222234???????&A9955&B102904.000,A,2233.0655,N,11404.9440,E,0.00,,030109,,*17|6.3|&C0100000100&D000024?>&E10000000"),
+                position("2009-01-03 10:29:04.000", true, 22.55109, 114.08240));
+
+        verifyPosition(decoder, text(
+                "$$2222234???????&A9955&B102904.000,A,2233.0655,N,11404.9440,E,0.00,,030109,,*17|6.3|&C0100000100&D000024?>&E10000000&Y00100020"));
+        
+        verifyPosition(decoder, text(
+                "$$2222234???????&A9955&B102904.000,A,2233.0655,N,11404.9440,E,0.00,,030109,,*17|6.3|&C0100000100&D000024?>&E10000000"));
+
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/CarscopProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/CarscopProtocolDecoderTest.java
new file mode 100644
index 000000000..412901d90
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/CarscopProtocolDecoderTest.java
@@ -0,0 +1,46 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class CarscopProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        CarscopProtocolDecoder decoder = new CarscopProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "*170821223045UB00HSO"));
+
+        verifyPosition(decoder, text(
+                "*170821223121UB05ORANGE000731512061825V0000.0000N00000.0000E000.0040331309.62"));
+
+        verifyPosition(decoder, text(
+                "*170724163029UB05ORANGE000000010061825V0000.0000N00000.0000E000.0040331309.62"));
+
+        verifyNull(decoder, text(
+                "*160618233129UB00HSO"));
+
+        verifyNull(decoder, text(
+                "*160618232614UD00232614A5009.1747N01910.3829E0.000160618298.2811000000L000000"));
+
+        verifyNull(decoder, text(
+                "*160618232529UB05CW9999C00000538232529A5009.1747N01910.3829E0.000160618298.2811000000L000000"));
+
+        verifyPosition(decoder, text(
+                "*040331141830UB05123456789012345061825A2934.0133N10627.2544E000.0040331309.6200000000L000000"),
+                position("2004-03-31 06:18:25.000", true, 29.56689, 106.45424));
+
+        verifyPosition(decoder, text(
+                "*040331141830UB04999999984061825A2934.0133N10627.2544E000.0040331309.6200000000L000000"));
+
+        verifyPosition(decoder, text(
+                "*040331141830UA012Hi-jack061825A2934.0133N10627.2544E000.0040331309.6200000000L000000"));
+
+        verifyPosition(decoder, text(
+                "*150817160254UB05CC8011400042499160254A2106.8799S14910.2583E000.0150817158.3511111111L000000"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/CastelProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/CastelProtocolDecoderTest.java
new file mode 100644
index 000000000..27f503b34
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/CastelProtocolDecoderTest.java
@@ -0,0 +1,144 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class CastelProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        CastelProtocolDecoder decoder = new CastelProtocolDecoder(null);
+
+        verifyAttributes(decoder, binary(
+                "40403a00043231335750323031373030363135360000000000a00200000100000101201100344a474446364545374a4230373632363056ff0d0a"));
+
+        verifyAttributes(decoder, binary(
+                "4040560004323133474c3230313630303033363400000000004002a122a05a5423a05abe0f2a000000000007f1f90014000000040001640011170003001e000505210b210c210d210f2101062b58ef02001a25950d0a"));
+
+        verifyAttributes(decoder, binary(
+                "404057000431303031313132353239393837000000000000004002C1F06952F0F169529C9111000000000069830000470000000400036401014C01030078000505210C210D210F21102101073BE8030064280AEB930D0A"));
+
+        verifyPosition(decoder, binary(
+                "40405f000536303331353030303335313200000000000000004001040212102a2f72b29302a0af8512b40787018e000000000043e4ae000000007ca0f7224d5049503632305f56312e312e30004d5049502d3632302056322e300072140d0a"));
+
+        verifyPosition(decoder, binary(
+                "24245000363137313135313243333133360000000000000040011b011207133ac49a390464514a15000000008e480c00000917000000000000ffafffaf00010000ffff7800ffffffffffffff003c0d0a"));
+
+        verifyPositions(decoder, binary(
+                "40408200033231334c32303137303031313039000000000000100136477b5964477b590400000000000000dc410f000000000204000709207910008304011c07110e110dd41a160714a95a0f00001e058c4944442d3231334c2056312e312e3120323031372d30352d3038004944442d3231334c2056312e312e300000006da10d0a"));
+
+        verifyPositions(decoder, binary(
+                "40408200033231334c323031373030303131370000000000001001000c6759a10d67590a9e1200000000000e3e0000000000020000000e4e791c000004010d0711060515083017086cd1181f000040067d4944442d3231334c2056312e312e3120323031372d30352d3038004944442d3231334c2056312e312e3000000066e30d0a"));
+
+        verifyAttributes(decoder, binary(
+                "404043000432313345503230313630303035383500000000004006a2021d5810031d58ae940400da050000f6040000070000000400076401680000000001001bd20d0a"));
+
+        verifyNull(decoder, binary(
+                "4040d0000432313345503230313630303035383500000000001001831c1c58b1fc1c58ae94040012220000f60400005800000000000763016800008484004944445f3231335730315f532056312e302e37004944445f3231335730315f482056312e302e370032000110021003100410051006100710081009100a100b100c100d100e1011100111021103110411051106110711011202120312041201130213031301160216011701180218011b011c011d011e011f021f031f041f051f061f071f0121022101260127012861780d0a"));
+
+        verifyNull(decoder, binary(
+                "404029000432313345503230313630303035383500000000009001ffffffff0000b4fc1c582b6e0d0a"));
+
+        verifyPositions(decoder, binary(
+                "40406000043231334550323031363030303538350000000000400708000000831c1c58f4fb1c58ae94040012220000f604000058000000200007630168000084c401040b10090c3532db3f07f07f7520090100000101010e00000000c7920d0a"));
+
+        verifyNull(decoder, binary(
+                "404042000432313345503230313630303035383500000000001002831c1c58b7fc1c58ae94040012220000f604000058000000000007630168000084840072a20d0a"));
+
+        verifyNull(decoder, binary(
+                "4040d0000432313345503230313630303035383500000000001001831c1c5805fe1c58ae94040012220000f60400005800000000000763016800008484004944445f3231335730315f532056312e302e37004944445f3231335730315f482056312e302e370032000110021003100410051006100710081009100a100b100c100d100e1011100111021103110411051106110711011202120312041201130213031301160216011701180218011b011c011d011e011f021f031f041f051f061f071f012102210126012701284eb10d0a"));
+
+        verifyAttributes(decoder, binary(
+                "40405700043231334e583230313630303131373700000000004002c458ce572159ce57a9e2020082030000500c00000f0000000400036401240e0403023c000505210c210d210f21102101075b14030121330269430d0a"));
+
+        verifyNull(decoder, binary(
+                "40407800043231334e583230313630303131373700000000004004fa52ce574b53ce57cad1020041020000050c00000d0000000400036401240b0503001b042105210c210d210f211021112113211c211f212121232124212c212d213021312133213e2141214221452149214a214c214f215021384e0d0a"));
+
+        verifyAttributes(decoder, binary(
+                "4040a600043231334e583230313630303131373700000000004005fa52ce575053ce57cad102006b020000050c00000d0000000400036401240b050300001b042105210c210d210f211021112113211c211f212121232124212c212d213021312133213e2141214221452149214a214c214f215021015bd604301f500600000653000000bc0bffff78250000ff2d98642401000f8080e038000f0f0000000000000077b10d0a"));
+
+        verifyAttributes(decoder, binary(
+                "40404300043231334e583230313630303131373700000000004006fa52ce574e53ce57cad1020053020000050c00000d0000000400036401240b0503000000feec0d0a"));
+
+        verifyPosition(decoder, binary(
+                "40403600043231334e583230313630303033343600000000004009ad31a457050810061a35b29bf80ae6da83180300320bbe32580d0a40403600043231334e583230313630303033343600000000004009ad31a457050810061a35b29bf80ae6da83180300320bbe32580d0a"));
+
+        verifyNull(decoder, binary(
+                "4040d400043535333133350000000000000000000000000000100196d499574bd899570000000000000000010000000000000000000000002410000000004944445f3231334730325f532056322e332e345f4e004944445f3231334730325f482056322e332e345f4e0032000110021003100410051006100710081009100a100b100c100d100e1011100111021103110411051106110711011202120312041201130213031301160216011701180218011b011c011d011e011f021f031f041f051f061f071f012102210126012701285b410d0a"));
+
+        verifyPosition(decoder, binary(
+                "24243f00676e6768656636313031313132393030313734002001840d0000d2deb556020602100b35360456cf09e6ebac0200000000030000000001abc10d0a"));
+
+        verifyPosition(decoder, binary(
+                "24243f00676e6768656636313031313132393030313734002001840d000000dfb556020602100b36298256cf0956ebac020000990c7f0000000001b4830d0a"));
+
+        verifyPositions(decoder, binary(
+                "4040590004313030303030303030303800000000000000000040010072f53f56c25240560000000078b00900000000009c3100000000030100011900030001090b0f080106c04fe40b4037310c0060e001ff018d01e05e0d0a"));
+
+        verifyPositions(decoder, binary(
+                "40405900043231334e5832303135303030303336000000000040010073dd735600df7356b9220000270b000000000000000000000400000000240e03000201120c0f0a19050c1e5808ca35530dd902540d9c010000e5300d0a"));
+
+        verifyPositions(decoder, binary(
+                "404055000431303031313132353239393837000000000000001002C1F0695230086A529C911100000000000F890000A60500000000036301014CFF000001190A0D0539191480D60488C5721800000000BF8A640D0A"));
+
+        verifyPositions(decoder, binary(
+                "40406000043130303131313235323939383700000000000000400705000000C1F0695249F469529C9111000000000069830000D80040000400036401014C04030001190A0D04201E1480D60488C5721800000000AF0101060F000F00EA1E0D0A"));
+
+        verifyAttributes(decoder, binary(
+                "404057000431303031313132353239393837000000000000004002C1F06952F0F169529C9111000000000069830000470000000400036401014C01030078000505210C210D210F21102101073BE8030064280AEB930D0A"));
+
+        verifyPositions(decoder, binary(
+                "40405900043130303131313235323939383700000000000000400101C1F06952E7F069529C9111000000000069830000070000000400036401014C00030001190A0D0412041480D60488C57218000000009F01E803ED9A0D0A"));
+
+        verifyAttributes(decoder, binary(
+                "4040B9000431303031313132353239393837000000000000004005C1F069521BF169529C9111000000000069830000130000000400036401014C0003000022032104210521062107210C210D210E210F2110211121132115211C211F21212124212E212F2130213121322133213C214221432144214521472149214A214C214D214E210100643B6232E803003E64280A3C24FE00010E010F00D5805A483C640000000000010000E02E000000066400000500000000A7710D0A"));
+
+        verifyAttributes(decoder, binary(
+                "404043000431303031313132353239393837000000000000004006C1F0695209F169529C91110000000000698300000D0000000400036401014C00030000009AF40D0A"));
+
+        verifyNull(decoder, binary(
+                "404086000431303031313132353239393837000000000000004004C1F0695200F169529C91110000000000698300000D0000000400036401014C00030022032104210521062107210C210D210E210F2110211121132115211C211F21212124212E212F2130213121322133213C214221432144214521472149214A214C214D214E219AE90D0A"));
+
+        verifyPositions(decoder, binary(
+                "40407F000431303031313132353239393837000000000000001001C1F06952FDF069529C91110000000000698300000C0000000000036401014C00030001190A0D04121A1480D60488C5721800000000AF4944445F3231364730325F532056312E322E31004944445F3231364730325F482056312E322E31000000DF640D0A"));
+
+        verifyPositions(decoder, binary(
+                "404044000c3631313135303030303935360000000000000000420600011e0a0f0b1312864fcd08c07a13030100640acf000004000a000000000000007ba083a66ad80d0a"));
+
+        verifyPosition(decoder, binary(
+                "40405c000c363131313530303030393536000000000000000040011c0a0f0e362dca53cd0860831303000000000300000000ff000000000000007ba083a650542d3639305f56312e312e320050542d3639302056312e32008a020d0a"));
+
+        verifyAttributes(decoder, binary(
+                "4040450004323132474c31313433303035303033000000000040082ca89b55a6a99b555c57000000000000c40200000b0000001400036401111f000302f5533bd653f10d0a"));
+
+        verifyNull(decoder, binary(
+                "40404d0004323132474c3131343330303530303300000000004007120000002ca89b55cba99b555c57000000000000c40200000b0000000000036401111f000102000101170000000068850d0a"));
+
+        verifyNull(decoder, binary(
+                "4040420004323132474c31313433303035303033000000000010022ca89b55cca99b555c57000000000000cf0200000b0000000000036401111f0000020013be0d0a"));
+
+        verifyAttributes(decoder, binary(
+                "4040870004323132474c31313433303035303033000000000040052ca89b55e3a89b555c57000000000000c4020000040000001400036401111f0003000012042105210b210c210d210f211021112113211c2121212321242133213421422146214f212b50663603003ce9030dff060000600dffffc25865ffff9e02b43624000000003cbc0d0a"));
+
+        verifyNull(decoder, binary(
+                "4040d00004323132474c31313433303035303033000000000010013ec09b5596c29b555c57000000000000de0200000f0000000000036401111f000000004944445f3231334730325f532056322e322e36004944445f3231334730325f482056322e322e360032000110021003100410051006100710081009100a100b100c100d100e1011100111021103110411051106110711011202120312041201130213031301160216011701180218011b011c011d011e011f021f031f041f051f061f071f012102210126012701288a690d0a"));
+
+        verifyNull(decoder, binary(
+                "40404d0004323132474c3131343330303530303300000000004007050000003ec09b5564c29b555c57000000000000de0200000f0000002000036401111f0000020001010e00000000237e0d0a"));
+
+        verifyNull(decoder, binary(
+                "40401F00043130303131313235323939383700000000000000100303320D0A"));
+
+        verifyPositions(decoder, binary(
+                "40407F000431303031313132353239393837000000000000001001C1F06952FDF069529C91110000000000698300000C0000000000036401014C00030001190A0D04121A1480D60488C5721800000000AF4944445F3231364730325F532056312E322E31004944445F3231364730325F482056312E322E31000000DF640D0A"));
+
+        verifyPositions(decoder, binary(
+                "40405900043130303131313235323939383700000000000000400101C1F06952E7F069529C9111000000000069830000070000000400036401014C00030001190A0D0412041480D60488C57218000000009F01E803ED9A0D0A"));
+        
+        verifyPositions(decoder, binary(
+                "40405900043335343034333035303834343134330000000000400100f61a7355c11b7355710000000b00000000000000000000000400000000240e0200020106060f100b2d5a78a7076ec0fb1d00008c065f010000ac220d0a"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/CastelProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/CastelProtocolEncoderTest.java
new file mode 100644
index 000000000..bcb93a010
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/CastelProtocolEncoderTest.java
@@ -0,0 +1,22 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+public class CastelProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        CastelProtocolEncoder encoder = new CastelProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_ENGINE_STOP);
+
+        verifyCommand(encoder, command, binary("40402000013132333435363738393031323334350000000000458301a94a0d0a"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/CautelaProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/CautelaProtocolDecoderTest.java
new file mode 100644
index 000000000..28236c87f
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/CautelaProtocolDecoderTest.java
@@ -0,0 +1,18 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class CautelaProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        CautelaProtocolDecoder decoder = new CautelaProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "20,010907000000,14,02,18,16.816667,96.166667,1325,S,*2E"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/CellocatorProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/CellocatorProtocolDecoderTest.java
new file mode 100644
index 000000000..769760fa5
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/CellocatorProtocolDecoderTest.java
@@ -0,0 +1,33 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class CellocatorProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        CellocatorProtocolDecoder decoder = new CellocatorProtocolDecoder(null);
+
+        verifyPosition(decoder, binary(
+                "4d4350470041420f000402021226d8a70221d801010000000001000000000000000000000000c4d90000000ca7a741ff0096dd15a40700000000000000001619130c01e307e4"));
+
+        verifyPosition(decoder, binary(
+                "4D434750008AD01500080103011804000000460020000000005E750000000000000000000000C34300040204DA4DA30367195703E803000000000000000001030F0802E10778"));
+
+        verifyPosition(decoder, binary(
+                "4D434750008AD01500080102011804000000360060000000005E750000000000000000000000C24300040204DA4DA30367195703E80300000000000000003B020F0802E107DF"));
+
+        verifyPosition(decoder, binary(
+                "4D4347500006000000081A02021204000000210062300000006B00E100000000000000000000E5A100040206614EA303181A57034E1200000000000000001525071403D60749"));
+        
+        verifyPosition(decoder, binary(
+                "4d434750000101000008011f041804000000200100000000005e750000000000000000000000548500040204da4da30367195703e80300000000000000002014151007dd07f7"));
+        
+        verifyPosition(decoder, binary(
+                "4d434750005e930100080102041804000000200f20000000005e7500000000000000000000005af400040204da4da30367195703e8030000000000000000021a111e08dd0760"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/CellocatorProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/CellocatorProtocolEncoderTest.java
new file mode 100644
index 000000000..89850fb5f
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/CellocatorProtocolEncoderTest.java
@@ -0,0 +1,26 @@
+package org.traccar.protocol;
+
+import org.junit.Ignore;
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+public class CellocatorProtocolEncoderTest extends ProtocolTest {
+
+    @Ignore
+    @Test
+    public void testEncode() throws Exception {
+
+        CellocatorProtocolEncoder encoder = new CellocatorProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_OUTPUT_CONTROL);
+        command.set(Command.KEY_INDEX, 0);
+        command.set(Command.KEY_DATA, "1");
+
+        verifyCommand(encoder, command, binary("4D434750000000000000000000000303101000000000000026"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/CguardProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/CguardProtocolDecoderTest.java
new file mode 100644
index 000000000..a386b6b47
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/CguardProtocolDecoderTest.java
@@ -0,0 +1,78 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class CguardProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        CguardProtocolDecoder decoder = new CguardProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "IDRO:354868050655283"));
+
+        verifyPosition(decoder, text(
+                "NV:190225 144543:55.776505:37.729000:0:10:0:0"));
+
+        verifyAttributes(decoder, text(
+                "BC:190225 144543:CSQ1:64:NSQ1:0:NSQ2:1:BAT1:100"));
+
+        verifyAttributes(decoder, text(
+                "BC:190225 142653:CSQ1:80:NSQ1:0:NSQ2:1:BAT1:3.53"));
+
+        verifyPosition(decoder, text(
+                "NV:170409 031456:56.808553:60.595476:0:NAN:0"));
+
+        verifyAttributes(decoder, text(
+                "BC:170409 031456:CSQ1:64:NSQ1:17:PWR1:0"));
+
+        verifyPosition(decoder, text(
+                "NV:161007 122043:55.812730:37.733689:3.62:NAN:244.05:143.4"));
+
+        verifyPosition(decoder, text(
+                "NV:161007 122044:55.812732:37.733670:3.97:NAN:260.95:143.9"));
+
+        verifyAttributes(decoder, text(
+                "BC:161007 122044:CSQ1:77:NSQ1:18:BAT1:100"));
+
+        verifyPosition(decoder, text(
+                "NV:160711 044023:54.342907:48.582590:0:NAN:0:110.1"));
+
+        verifyPosition(decoder, text(
+                "NV:160711 044023:54.342907:-148.582590:0:NAN:0:110.1"));
+
+        verifyAttributes(decoder, text(
+                "BC:160711 044023:CSQ1:48:NSQ1:7:NSQ2:1:BAT1:98:PWR1:11.7:CLG1:NAN"));
+
+        verifyAttributes(decoder, text(
+                "BC:160711 044524:CSQ1:61:NSQ1:18:BAT1:98:PWR1:11.7:CLG1:NAN"));
+
+        verifyNull(decoder, text(
+                "VERSION:3.3"));
+
+        verifyPosition(decoder, text(
+                "NV:160420 101902:55.799425:37.674033:0.94:NAN:213.59:156.6"));
+
+        verifyAttributes(decoder, text(
+                "BC:160628 081024:CSQ1:32:NSQ1:10:BAT1:100"));
+
+        verifyAttributes(decoder, text(
+                "BC:160628 081033:NSQ2:0"));
+
+        verifyPosition(decoder, text(
+                "NV:160630 151537:55.799913:37.674267:0.7:NAN:10.21:174.9"));
+
+        verifyAttributes(decoder, text(
+                "BC:160630 153316:BAT1:76"));
+
+        verifyAttributes(decoder, text(
+                "BC:160630 153543:NSQ2:0"));
+
+        verifyNull(decoder, text(
+                "PING"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/CityeasyProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/CityeasyProtocolDecoderTest.java
new file mode 100644
index 000000000..146e13ae8
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/CityeasyProtocolDecoderTest.java
@@ -0,0 +1,41 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+
+public class CityeasyProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        CityeasyProtocolDecoder decoder = new CityeasyProtocolDecoder(null);
+
+        verifyNotNull(decoder, binary(
+                "545400853575570249020100033b3430342c34352c31303638312c31313632312c33352c31303638312c31313632322c32332c31303638312c32383938332c32332c31303638312c31313632332c32312c31303638312c32333338312c31372c31303638312c32323538332c31372c31303638312c32363434312c31330000000d352e0d0a"));
+
+        verifyNull(decoder, binary(
+                "54540019357557024902010002520704100000000bbe700d0a"));
+
+        verifyNull(decoder, binary(
+                "5454001735755702490201434a01000000000c24280d0a"));
+
+        verifyNull(decoder, binary(
+                "545400153520000000000100010000000111000D0A"));
+
+        verifyNull(decoder, binary(
+                "54540019357557024902000002520704300000000376390d0a"));
+
+        verifyPosition(decoder, binary(
+                "5454006135200000000001000332303134313131303039353430392C412C342C4E2C32322E3533373232382C452C3131342E3032323737342C302E312C312E392C35302E363B3436302C302C31303137332C343635322C34310000000B63130D0A"),
+                position("2014-11-10 09:54:09.000", true, 22.53723, 114.02277));
+
+        verifyPosition(decoder, binary(
+                "5454006135200000000001000432303134313131303039353330362C412C352C4E2C32322E3533373233352C452C3131342E3032323838312C302E322C312E362C35342E313B3436302C302C31303137332C343635322C343100000045EC620D0A"));
+
+        verifyPosition(decoder, binary(
+                "5454009035755702490200000332303135303732393033303834352c412c362c4e2c31322e3833353735362c452c37372e3638373039362c302e332c312e322c3931302e303b3430342c34352c31303638312c31313632312c34332c31303638312c31313632332c32312c31303638312c32323538332c32302c31303638312c32333338312c31380000000267370d0a"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/CityeasyProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/CityeasyProtocolEncoderTest.java
new file mode 100644
index 000000000..7c03b7d5b
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/CityeasyProtocolEncoderTest.java
@@ -0,0 +1,23 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+public class CityeasyProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        CityeasyProtocolEncoder encoder = new CityeasyProtocolEncoder();
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_SET_TIMEZONE);
+        command.set(Command.KEY_TIMEZONE, "GMT+6");
+
+        verifyCommand(encoder, command, binary("5353001100080001680000000B60820D0A"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/ContinentalProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/ContinentalProtocolDecoderTest.java
new file mode 100644
index 000000000..83722ef97
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/ContinentalProtocolDecoderTest.java
@@ -0,0 +1,29 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class ContinentalProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        ContinentalProtocolDecoder decoder = new ContinentalProtocolDecoder(null);
+
+        verifyPosition(decoder, binary(
+                "5356003216001eb48505025b4001e90f7f18ce0f00522200400001015b4001e9000e820100000c24000100014e0400736a7a"),
+                position("2018-07-06 23:57:29.000", true, -23.46609, -46.54497));
+
+        verifyPosition(decoder, binary(
+                "5356002A1100003039030243A68B5700FEB5AB00FD715F012700000143A68B57000E000000000C2F00000130"),
+                position("2005-12-19 10:28:39.000", true, -23.49027, -46.55138));
+
+        verifyPosition(decoder, binary(
+                "5356002a0d0010a12403025a9ea47f00feb48400fd6e63000c0000015a9ea480000e000100000c000000"));
+
+        verifyPosition(decoder, binary(
+                "5356002a0d0010a1240302581b944100febed800fd9fa30139001300581c73fa000e000000000d000001"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/CradlepointProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/CradlepointProtocolDecoderTest.java
new file mode 100644
index 000000000..7ffad8015
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/CradlepointProtocolDecoderTest.java
@@ -0,0 +1,36 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class CradlepointProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        CradlepointProtocolDecoder decoder = new CradlepointProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "356526070063940,0,4337.19009,N,11612.34705,W,0.0,277.2,AT&T,,,-79,,-14.0,"));
+
+        verifyPosition(decoder, text(
+                "356526070063940,1,4337.19008,N,11612.34705,W,0.0,277.2,AT&T,,,-79,,-14.0,"));
+
+        verifyPosition(decoder, text(
+                "+14063964266,162658,4333.62404,N,11636.23469,W,0.0,,Verizon Wireless,LTE,-107,-74,-16,,100.68.169.178"));
+
+        verifyPosition(decoder, text(
+                "+12084014675,162658,4337.174385,N,11612.338373,W,0.0,,Verizon,,-71,-44,-11,,"));
+
+        verifyPosition(decoder, text(
+                "353547063544681,170515,3613.25,N,11559.14,W,0.0,,,,,,,,"));
+
+        verifyPosition(decoder, text(
+                "353547060558130,170519,4337.17,N,11612.34,W,0.0,294.7,,,,,,,"));
+
+        verifyPosition(decoder, text(
+                "+12084014675,162658,4337.174385,N,11612.338373,W,0.0,,Verizon,,-71,-44,-11,,"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/DishaProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/DishaProtocolDecoderTest.java
new file mode 100644
index 000000000..ddb5aca18
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/DishaProtocolDecoderTest.java
@@ -0,0 +1,25 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class DishaProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        DishaProtocolDecoder decoder = new DishaProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$A#A#864161028848856#A#053523#010216#2232.7733#N#08821.1940#E#002.75#038.1#09#00.8#1800#0#000#0000#9999#11.7#285.7#0001*"));
+
+        verifyPosition(decoder, text(
+                "$A#A#864161028848856#A#182134#090116#2232.0191#N#08821.3278#E#001.74#231.4#04#01.5#1300#0#000#0000#9999#54.4#6407.7#0000*"),
+                position("2016-01-09 18:21:34.000", true, 22.53365, 88.35546));
+
+        verifyPosition(decoder, text(
+                "$A#A#353943046615971#A#064219#281113#1836.7267#N#07347.4177#E#000.00#280.4#09#00.8#3000#2#100#0000#8888#86.5#3919.1#0000*"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/DmtHttpProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/DmtHttpProtocolDecoderTest.java
new file mode 100644
index 000000000..e9d98d6d3
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/DmtHttpProtocolDecoderTest.java
@@ -0,0 +1,19 @@
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.HttpMethod;
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class DmtHttpProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        DmtHttpProtocolDecoder decoder = new DmtHttpProtocolDecoder(null);
+
+        verifyPositions(decoder, request(HttpMethod.POST, "/",
+                buffer("{\"SerNo\":131693,\"IMEI\":\"356692063643328\",\"ICCID\":\"8944538523010771676\",\"ProdId\":33,\"FW\":\"33.4.1.27\",\"Records\":[{\"SeqNo\":125,\"Reason\":11,\"DateUTC\":\"2017-05-11 05:58:44\",\"Fields\":[{\"GpsUTC\":\"2017-05-08 18:04:57\",\"Lat\":43.7370138,\"Long\":-79.3462607,\"Alt\":197,\"Spd\":0,\"SpdAcc\":13,\"Head\":66,\"PDOP\":18,\"PosAcc\":37,\"GpsStat\":7,\"FType\":0},{\"DIn\":2,\"DOut\":0,\"DevStat\":2,\"FType\":2},{\"AnalogueData\":{\"1\":14641,\"3\":2484,\"4\":26,\"5\":10868},\"FType\":6},{\"AnalogueData\":{\"11\":34,\"12\":0,\"13\":309,\"14\":9921,\"15\":3},\"FType\":7}]},{\"SeqNo\":128,\"Reason\":11,\"DateUTC\":\"2017-05-11 17:59:45\",\"Fields\":[{\"GpsUTC\":\"2017-05-08 18:04:57\",\"Lat\":43.7370138,\"Long\":-79.3462607,\"Alt\":197,\"Spd\":0,\"SpdAcc\":13,\"Head\":66,\"PDOP\":18,\"PosAcc\":37,\"GpsStat\":7,\"FType\":0},{\"DIn\":2,\"DOut\":0,\"DevStat\":2,\"FType\":2},{\"AnalogueData\":{\"1\":14607,\"3\":2752,\"4\":26,\"5\":11062},\"FType\":6},{\"AnalogueData\":{\"11\":34,\"12\":1,\"13\":325,\"14\":10881,\"15\":3},\"FType\":7}]},{\"SeqNo\":130,\"Reason\":9,\"DateUTC\":\"2017-05-11 19:30:03\",\"Fields\":[{\"GpsUTC\":\"2017-05-08 18:04:57\",\"Lat\":43.7370138,\"Long\":-79.3462607,\"Alt\":197,\"Spd\":0,\"SpdAcc\":13,\"Head\":66,\"PDOP\":18,\"PosAcc\":37,\"GpsStat\":3,\"FType\":0},{\"DIn\":6,\"DOut\":0,\"DevStat\":2,\"FType\":2},{\"AnalogueData\":{\"1\":14599,\"3\":2731,\"4\":27,\"5\":10965},\"FType\":6},{\"AnalogueData\":{\"11\":34,\"12\":2,\"13\":329,\"14\":11121,\"15\":3},\"FType\":7}]},{\"SeqNo\":131,\"Reason\":11,\"DateUTC\":\"2017-05-11 19:32:03\",\"Fields\":[{\"GpsUTC\":\"2017-05-08 18:04:57\",\"Lat\":43.7370138,\"Long\":-79.3462607,\"Alt\":197,\"Spd\":0,\"SpdAcc\":13,\"Head\":66,\"PDOP\":18,\"PosAcc\":37,\"GpsStat\":7,\"FType\":0},{\"DIn\":6,\"DOut\":0,\"DevStat\":2,\"FType\":2},{\"AnalogueData\":{\"1\":14403,\"3\":2783,\"4\":27,\"5\":10965},\"FType\":6},{\"AnalogueData\":{\"11\":34,\"12\":2,\"13\":330,\"14\":11181,\"15\":3},\"FType\":7}]},{\"SeqNo\":133,\"Reason\":11,\"DateUTC\":\"2017-05-11 19:36:15\",\"Fields\":[{\"GpsUTC\":\"2017-05-08 18:04:57\",\"Lat\":43.7370138,\"Long\":-79.3462607,\"Alt\":197,\"Spd\":0,\"SpdAcc\":13,\"Head\":66,\"PDOP\":18,\"PosAcc\":37,\"GpsStat\":7,\"FType\":0},{\"DIn\":6,\"DOut\":0,\"DevStat\":2,\"FType\":2},{\"AnalogueData\":{\"1\":14319,\"3\":2898,\"4\":23,\"5\":10965},\"FType\":6},{\"AnalogueData\":{\"11\":34,\"12\":3,\"13\":331,\"14\":11241,\"15\":3},\"FType\":7}]}]}")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/DmtProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/DmtProtocolDecoderTest.java
new file mode 100644
index 000000000..ae5e9353c
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/DmtProtocolDecoderTest.java
@@ -0,0 +1,42 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class DmtProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        DmtProtocolDecoder decoder = new DmtProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "0255003300001b00003335333232393032373533393235310038393931353030303030303030313330343539340000000403041910780603"));
+
+        verifyPositions(decoder, false, binary(
+                "02551040000eaca40d00d2b8e562c51f9912f39a6bee00007e420091090903070100000000008b1065360000000000007fd401c4fcf2feffffffffffffffffee0000003f1b"));
+
+        verifyPositions(decoder, false, binary(
+                "02551080000eada40d00d2b8e58ac51f9912f39a6bee00007e42007e090709070000000000009010fc330000000000007fc201a0fc04ffffffffffffffffffe5000000c5d00eaea40d00d2b8e58ac51f9912f39a6bee00007e42007e09070207000000000000851008340000000000007fc201a0fc04ff0000000000000000e5000000c96d"));
+
+        verifyNull(decoder, binary(
+                "025500310038f90100333533333233303831363639373330003839363130313835303031383234383434363330002202010900000000"));
+
+        verifyNull(decoder, binary(
+                "0255220000"));
+
+        verifyPositions(decoder, false, binary(
+                "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"));
+
+        verifyPositions(decoder, false, binary(
+                "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"));
+
+        verifyNull(decoder, binary(
+                "025500310038f90100333533333233303831363639373330003839363130313435363839393333303030303835002202010900000000"));
+
+        verifyPositions(decoder, binary(
+                "0255043D003D004746000096D684020B001502D48402F043F4EC2A6909452B001F00050011230302080000000000000A00060F041D0001FE0F021E0005000003BF08"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/DwayProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/DwayProtocolDecoderTest.java
new file mode 100644
index 000000000..107a2a435
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/DwayProtocolDecoderTest.java
@@ -0,0 +1,30 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class DwayProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        DwayProtocolDecoder decoder = new DwayProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "AA55,36,10024,1,171025,161055,36.0294,-79.7881,201, 2.5,111,1000,0000,00000,3578,0,0,0,D"));
+
+        verifyPosition(decoder, text(
+                "AA55,115,318,1,171024,195059,28.0153,-82.4761,3, 1.0,319,1000,0000,00000,4244,0,0,0,D"));
+
+        verifyPosition(decoder, text(
+                "AA55,117,318,1,171025,153758,28.0152,-82.4759,19, 0.6,319,1000,0000,10000,4242,0,0,0,D"));
+
+        verifyPosition(decoder, text(
+                "AA55,1,123456,1,140101,101132,22.5500,113.6770,75,70.5,320,1100,0011,1110,3950,33000,24000,12345678"));
+
+        verifyNull(decoder, text(
+                "AA55,HB"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/EasyTrackProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/EasyTrackProtocolDecoderTest.java
new file mode 100644
index 000000000..b26991ae7
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/EasyTrackProtocolDecoderTest.java
@@ -0,0 +1,55 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class EasyTrackProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        EasyTrackProtocolDecoder decoder = new EasyTrackProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "*ET,358155100054249,HB,A,100b06,053318,803a0b51,03d507c9,0017,0000,00400000,07,100,0000,1435,63"));
+
+        verifyNull(decoder, text(
+                "*ET,358155100054249,MQ"));
+
+        verifyNull(decoder, text(
+                "*ET,358155100054249,TX,A,100b06,053230"));
+
+        verifyPosition(decoder, text(
+                "*ET,358155100054249,HB,A,100b06,053212,803a0b20,03d507a2,0054,0000,40400000,06,100,0000,1435,44"));
+
+        verifyNull(decoder, text(
+                "*ET,135790246811221,GZ,0001,0005"));
+
+        verifyPosition(decoder, text(
+                "*ET,135790246811221,DW,A,0A090D,101C0D,00CF27C6,0413FA4E,0000,0000,00000000,20,4,0000,00F123"),
+                position("2010-09-13 16:28:13.000", true, 22.62689, 114.03021));
+
+        verifyNull(decoder, text(
+                "*ET,358155100048430,CC,0.0,V,100603,141817,80d77ae8,81ab1ffd,0000,6b08,40000000,19,99,0000,fa9,918"));
+
+        verifyPosition(decoder, text(
+                "*ET,135790246811221,DW,A,050915,0C2A27,00CE5954,04132263,0000,0000,01000000,20,4,0000,001254"));
+
+        verifyPosition(decoder, text(
+                "*ET,135790246811221,DW,A,0A090D,101C0D,00CF27C6,0413FA4E,0000,0000,00000000,20,4,0000,00F123,100"));
+
+        verifyPosition(decoder, text(
+                "*ET,135790246811221,DW,A,0A090D,101C0D,00CF27C6,8413FA4E,0000,0000,00000000,20,4,0000,00F123,100"));
+
+        verifyPosition(decoder, text(
+                "*ET,358155100003016,HB,A,0d081e,07381e,8038ee09,03d2e9be,004f,0000,40c00000,0f,100,0000,00037c,29"));
+
+        verifyPosition(decoder, text(
+                "*ET,358155100003016,HB,A,0d081e,073900,8038ee2f,03d2e9fd,0114,0000,40c00000,12,100,0000,00037c,32"));
+
+        verifyPosition(decoder, text(
+                "*ET,135790246811221,HB,A,050915,0C2A27,00CE5954,04132263,0000,0000,01000000,20,4,0000,00F123,100,200"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/EelinkProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/EelinkProtocolDecoderTest.java
new file mode 100644
index 000000000..e3cff9525
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/EelinkProtocolDecoderTest.java
@@ -0,0 +1,114 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Position;
+
+public class EelinkProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        EelinkProtocolDecoder decoder = new EelinkProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "454C0027E753035254407167747167670100180002035254407167747100200205020500010432000086BD"));
+
+        verifyAttributes(decoder, binary(
+                "676707006502df5c89fde800bc3fa8030302005555045b555555057a5555550b225555550c105c55550d115555550e7e5555550f4555555510017b5555112b5555551f01ed5555208005b0012100005555407ad000004237f5555589000000498a0000aef78b00000000"));
+
+        verifyAttribute(decoder, binary(
+                "676712003400e45c5b0ade02012e03702d87064546aa24066a1086018a0000002dc1a0ffffffff0afd074d000000000000000000000000fce0"),
+                Position.PREFIX_TEMP + 2, -50.0);
+
+        verifyAttribute(decoder, binary(
+                "6767120043000e5c37387c0304e4e1b4f8194fa800160013009408012e03702d8706453c6e5b066f115f05710000001b067f8d248d240313020500000000000000000000000001cc"),
+                Position.PREFIX_TEMP + 2, 28.75);
+
+        verifyPosition(decoder, binary(
+                "676714002414B05AD43A7D03026B92B10C395499FFD7000000000701CC00002495000014203604067B"));
+
+        verifyNotNull(decoder, binary(
+                "676714004F14B0E68CAFE58AA8E68AA5E8ADA621E5B9BFE4B89CE79C81E6B7B1E59CB3E5B882E58D97E5B1B1E58CBAE696B0E8A5BFE8B7AF3138EFBC88E8B79DE5AE87E998B3E5A4A7E58EA63230E7B1B3EFBC89"));
+
+        verifyPosition(decoder, binary(
+                "676780005a000001000000004c61743a4e33312e38333935352c4c6f6e3a5738322e36313334362c436f757273653a302e30302c53706565643a302e30306b6d2f682c4461746554696d653a323031372d31322d30322031313a32393a3433"));
+
+        verifyPosition(decoder, binary(
+                "676780005E5788014C754C754C61743A4E32332E3131313734330A4C6F6E3A453131342E3430393233380A436F757273653A302E30300A53706565643A302E31374B4D2F480A446174652054696D653A323031352D30392D31332032303A32313A3230"));
+
+        verifyPosition(decoder, binary(
+                "454C0050EAE2035254407167747167671200410021590BD93803026B940D0C3952AD0021000000000501CC0001A53F0170F0AB1305890F11000000000000C2D0001C001600000000000000000000000000000000"));
+
+        verifyNull(decoder, binary(
+                "676701000c007b03525440717505180104"));
+
+        verifyPosition(decoder, binary(
+                "6767120048000559c1829213059a7400008e277d000c000000000800cc00080d2a000034df3cf0b429dd82cad3048910320000000000007b7320d005ba0000000019a000000000000000000000"));
+
+        verifyPosition(decoder, binary(
+                "6767050020213b59c6aecdff41dce70b8b977d00000001fe000a36e30078fe010159c6aecd"));
+
+        verifyPosition(decoder, binary(
+                "676705002102b459ae7388fcd360d7034332b1000000028f000a4f64002eb101010159ae7388"));
+
+        verifyPosition(decoder, binary(
+                "676702001c02b259ae7387fcd360d6034332b2000000028f000a4f64002eb10101"));
+
+        verifyPosition(decoder, binary(
+                "6767050022001F59643640000000000000000000000001CC0000249500142000015964A6C0006E"));
+
+        verifyAttributes(decoder, binary(
+                "67670300040021006E"));
+
+        verifyPosition(decoder, binary(
+                "676705002200255964369D000000000000000000000001CC0000249500142000025964A71D006A"));
+
+        verifyAttributes(decoder, binary(
+                "67670300040028006A"));
+
+        verifyPosition(decoder, binary(
+                "676712002d066c592cca6803002631a60b22127700240046005c08020d000301af000da0fd12007f11ce05820000001899c0"));
+
+        verifyPosition(decoder, binary(
+                "676702002509f65868507603a1e92e03cf90fe000000019f000117ee00111e0120631145003101510000"));
+
+        verifyAttributes(decoder, binary(
+                "676712001e0092579714d60201f90001785003a301cd1a006a118504f2000000000000"));
+
+        verifyPosition(decoder, binary(
+                "676712003400505784cc0b130246479b07d05a06001800000000070195039f046100002cc52e6466b391604a4900890e7c00000000000006ca"));
+
+        verifyPosition(decoder, binary(
+                "676714002b00515784cc24130246479b07d05a06001800010000060195039f046100002cc52f6466b391604a49020089"));
+
+        verifyNull(decoder, binary(
+                "676701000c002603541880486128290120"));
+
+        verifyPosition(decoder, binary(
+                "676704001c01a4569ff2dd0517a0f7020b0d9a06011000d8001e005b0004450183"));
+
+        verifyPosition(decoder, binary(
+                "676705002200ba569fc3520517a0d8020b0f740f007100d8001e005b0004460101569fd162001f"));
+
+        verifyPosition(decoder, binary(
+                "676702002500bb569fc3610517a091020b116000001900d8001e005b00044601001f1170003200000000"));
+
+        verifyPosition(decoder, binary(
+                "676704001c00b7569fc3020517a2d7020b08e100000000d8001e005b0004460004"));
+
+        verifyNull(decoder, binary(
+                "676701000b001b035418804661834901"));
+
+        verifyAttributes(decoder, binary(
+                "6767030004001A0001"));
+
+        verifyAttributes(decoder, binary(
+                "6767070088001050E2281400FFFFFFFF02334455660333445566043344556605AA00000007334455660A334455660B334455660C4E2000000DAA0000000E334455660F3344556610AAAA000011334455661C334455661F334455662133445566423344556646334455664D334455665C334455665E33445566880000000089000000008A000000008B00000000"));
+
+        verifyPosition(decoder, binary(
+                "676702001b03c5538086df0190c1790b3482df0f0157020800013beb00342401"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/EelinkProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/EelinkProtocolEncoderTest.java
new file mode 100644
index 000000000..e4502f919
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/EelinkProtocolEncoderTest.java
@@ -0,0 +1,22 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+public class EelinkProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_ENGINE_STOP);
+
+        verifyCommand(new EelinkProtocolEncoder(false), command, binary("676780000f0000010000000052454c41592c3123"));
+
+        verifyCommand(new EelinkProtocolEncoder(true), command, binary("454c001eb41a0123456789012345676780000f0000010000000052454c41592c3123"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/EgtsFrameDecoderTest.java b/src/test/java/org/traccar/protocol/EgtsFrameDecoderTest.java
new file mode 100644
index 000000000..237c849c5
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/EgtsFrameDecoderTest.java
@@ -0,0 +1,19 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class EgtsFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        EgtsFrameDecoder decoder = new EgtsFrameDecoder();
+
+        verifyFrame(
+                binary("0100020B0025003A5701C91A003A5701CD6E68490202101700CBB4740F7617FD924364104F116A0000000000010300001EC2"),
+                decoder.decode(null, null, binary("0100020B0025003A5701C91A003A5701CD6E68490202101700CBB4740F7617FD924364104F116A0000000000010300001EC2")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/EgtsProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/EgtsProtocolDecoderTest.java
new file mode 100644
index 000000000..2210893e7
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/EgtsProtocolDecoderTest.java
@@ -0,0 +1,37 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class EgtsProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        EgtsProtocolDecoder decoder = new EgtsProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "0100010b002200c06401f21700c1640171360d00010101140071360d000238363539303500000000000000000047fc"));
+
+        verifyNull(decoder, binary(
+                "0100000b002400a0d601f01900030081030000000101011600030000004238363434393530333436343333373600014cdc"));
+
+        verifyPositions(decoder, binary(
+                "0100000b002700030e01211800030e8573890100845e980f0202101500f85d980fb37f50aae9653c2b193708317b00000001c51b"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+        verifyPositions(decoder, binary(
+                "0100020B0025003A5701C91A003A5701CD6E68490202101700CBB4740F7617FD924364104F116A0000000000010300001EC2"),
+                position("2018-03-21 05:38:19.000", true, 51.67569, 55.59189));
+
+        verifyPositions(decoder, binary(
+                "0100020B0079000000011F6A001424951CA5CB0F23B5740F020210180023B5740F0A301994DA9C524C9128000A000000100082000011040018110300120900000003150100E803001B0700010000340900001B0700420000000000001B0700430000000000001B0700440000000000001B0700450000000000001B0700460000000000008020"));
+
+        verifyPositions(decoder, binary(
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
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/EnforaProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/EnforaProtocolDecoderTest.java
new file mode 100644
index 000000000..1c2f9492a
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/EnforaProtocolDecoderTest.java
@@ -0,0 +1,31 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class EnforaProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        EnforaProtocolDecoder decoder = new EnforaProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "000A08002020202020303131303730303030353730323637"));
+
+        verifyNull(decoder, binary(
+                "003B000502000000000820202020202030313130373030303035373032363720383A000000000D00508401358E640032B37700000367B00000A804"));
+
+        verifyPosition(decoder, binary(
+                "007100040200202020202020202020382020202020202031323334353637383930313233343520313320244750524D432C3232333135322E30302C412C333530392E3836303539342C4E2C30333332322E3734333838372C452C302E302C302E302C3032303631322C2C2C412A35320D0A"),
+                position("2012-06-02 22:31:52.000", true, 35.16434, 33.37906));
+
+        verifyPosition(decoder, binary(
+                "007600040200202020202020202020382020202020202030313138393230303036303831383920313320244750524D432C3137313834312E30302C412C333530392E3835323431302C4E2C30333332322E3735393131332C452C302E302C302E302C3137303731322C332E342C572C412A32350D0A00"));
+
+        verifyPosition(decoder, binary(
+                "006a000a081000202020202020202020333320202020202038363130373430323137313936353620204750524d432c3136313234382e30302c412c333433322e36393231312c532c30353833312e30323231372c572c302e3034382c2c3232303831342c2c2c412a3734"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/EsealProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/EsealProtocolDecoderTest.java
new file mode 100644
index 000000000..b615e5062
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/EsealProtocolDecoderTest.java
@@ -0,0 +1,33 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class EsealProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        EsealProtocolDecoder decoder = new EsealProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "##S,eSeal,1000821,256,3.0.6,Normal,34,2017-08-31,08:14:40,15,A,25.708828N 100.372870W,10,0,Close,0.71,0:0:3:0,3.8,-73,E##"));
+
+        verifyPosition(decoder, text(
+                "##S,eSeal,1000821,256,3.0.6,Startup,1,2017-08-31,02:01:19,3,V,0.000000N 0.000000E,0,0,Close,3.25,0:0:5:0,3.8,-93,E##"));
+
+        verifyNull(decoder, text(
+                "##S,eSeal,1000821,256,3.0.6,Startup OK,1,180,30,30,16,1,E##"));
+
+        verifyNull(decoder, text(
+                "##S,eSeal,1000821,256,3.0.6,Startup OK,1,180,30,30,16,1,E##"));
+
+        verifyPosition(decoder, text(
+                "##S,eSeal,1000898,256,3.0.6,Normal,6,2017-09-06,23:48:39,3,V,0.000000N 0.000000E,0,0,Close,1.0,0:0:3:0,4.0,-81,E##"));
+
+        verifyNull(decoder, text(
+                "##S,eSeal,1000898,256,3.0.6,RC-NFC DEL ACK,,E##"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/EsealProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/EsealProtocolEncoderTest.java
new file mode 100644
index 000000000..16f00d69b
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/EsealProtocolEncoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+import static org.junit.Assert.assertEquals;
+
+public class EsealProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        EsealProtocolEncoder encoder = new EsealProtocolEncoder();
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_ALARM_DISARM);
+
+        assertEquals("##S,eSeal,123456789012345,256,3.0.8,RC-Unlock,E##", encoder.encodeCommand(command));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/EskyFrameDecoderTest.java b/src/test/java/org/traccar/protocol/EskyFrameDecoderTest.java
new file mode 100644
index 000000000..ed587e4f3
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/EskyFrameDecoderTest.java
@@ -0,0 +1,31 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class EskyFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        EskyFrameDecoder decoder = new EskyFrameDecoder();
+
+        verifyFrame(
+                binary("454f3b303b3836313331313030363436313930383b523b363b3138303432303130343735313b322e39373839363b3130312e36353039313b302e37353b3332303b333339383b313b7c"),
+                decoder.decode(null, null, binary("454f3b303b3836313331313030363436313930383b523b363b3138303432303130343735313b322e39373839363b3130312e36353039313b302e37353b3332303b333339383b313b7c")));
+
+        verifyFrame(
+                binary("454c3b313b3836343930363032393139363632363b3137303832323134333432363b"),
+                decoder.decode(null, null, binary("454c3b313b3836343930363032393139363632363b3137303832323134333432363b")));
+
+        verifyFrame(
+                binary("454f3b303b3836343930363032393139363632363b523b302b3137303830383135353335322b302e30303030302b302e30303030302b302e30302b302b3078312b302b302b302b31323333"),
+                decoder.decode(null, null, binary("454f3b303b3836343930363032393139363632363b523b302b3137303830383135353335322b302e30303030302b302e30303030302b302e30302b302b3078312b302b302b302b31323333")));
+
+        verifyFrame(
+                binary("454f3b303b3836343930363032393139363632363b523b302b3137303830383135353335322b302e30303030302b302e30303030302b302e30302b302b3078312b302b302b302b31323333"),
+                decoder.decode(null, null, binary("454f3b303b3836343930363032393139363632363b523b302b3137303830383135353335322b302e30303030302b302e30303030302b302e30302b302b3078312b302b302b302b31323333454f3b303b3836343930363032393139363632363b523b302b3137303830383135353335322b302e30303030302b302e30303030302b302e30302b302b3078312b302b302b302b31323333")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/EskyProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/EskyProtocolDecoderTest.java
new file mode 100644
index 000000000..da7df0ab2
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/EskyProtocolDecoderTest.java
@@ -0,0 +1,30 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class EskyProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        EskyProtocolDecoder decoder = new EskyProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "EO;0;861311006461908;R;6;180420104751;2.97896;101.65091;0.75;320;3398;1;|"));
+
+        verifyNull(decoder, text(
+                "EL;1;864906029196626;170822143426;"));
+
+        verifyPosition(decoder, text(
+                "EO;0;864906029196626;R;7+170822143646+-26.10806+27.94600+0.40+0+0x1+0+102540+0+1242"));
+
+        verifyPosition(decoder, text(
+                "EO;0;864906029196626;R;0+170808155352+0.00000+0.00000+0.00+0+0x1+0+0+0+1233"));
+
+        verifyPosition(decoder, text(
+                "ET;1;014682000989425;R;0+171216001250+33.34405+-111.96682+0.00+0+0x1+0+25598+0+1257+0"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/ExtremTracProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/ExtremTracProtocolDecoderTest.java
new file mode 100644
index 000000000..c5b3364cf
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/ExtremTracProtocolDecoderTest.java
@@ -0,0 +1,33 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class ExtremTracProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        ExtremTracProtocolDecoder decoder = new ExtremTracProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$GPRMC,862106020628733,050859.000,A,1404.8573,N,08710.9967,W,0.00,0,080117,0,,00C8,00218,99,,,,,,0.00"));
+
+        verifyPosition(decoder, text(
+                "$GPRMC,10000000001,092313.299,A,2238.8947,N,11355.2253,E,0.00,311.19,010307,0,,"));
+
+        verifyPosition(decoder, text(
+                "$GPRMC,00000000000,092244.000,A,0000.0000,S,00000.0000,E,0.00,0.00,101016,0,,8000,0"));
+
+        verifyNull(decoder, text(
+                "$GPRMC,092313.299,A,2238.8947,N,11355.2253,E,0.00,311.19,010307,0,,1111,1111"));
+
+        verifyNull(decoder, text(
+                "$GPRMC,092313.299,A,2238.8947,N,11355.2253,E,0.00,311.19,010307,0,,"));
+
+        verifyNull(decoder, text(
+                "$GPRMC,100936.000,A,0000.0000,S,00000.0000,E,0.00,0.00,101016,0,,8000,0"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/FifotrackProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/FifotrackProtocolDecoderTest.java
new file mode 100644
index 000000000..1dcfc89c4
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/FifotrackProtocolDecoderTest.java
@@ -0,0 +1,30 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class FifotrackProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        FifotrackProtocolDecoder decoder = new FifotrackProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "$$79,868345037864709,382,D05,190220085833,22.643210,114.018176,1,1,1,13152,23FFD339*25"));
+
+        verifyPosition(decoder, text(
+                "$$105,866104023179743,AB,A00,,161007085534,A,54.738791,25.271918,0,350,151,0,17929,0000,0,,246|1|65|96DB,936|0*0B"));
+
+        verifyPosition(decoder, text(
+                "$$103,866104023179743,5,A00,,161006192841,A,54.738791,25.271918,0,342,200,0,4265,0000,0,,246|1|65|96DB,9C4|0*75"));
+
+        verifyPosition(decoder, text(
+                "$$103,866104023179743,4,A00,,161006192810,V,54.738791,25.271918,0,158,122,0,4235,0000,0,,246|1|65|96DB,9C5|0*69"));
+
+        verifyPosition(decoder, text(
+                "$$135,866104023192332,29,A01,,160606093046,A,22.546430,114.079730,0,186,181,0,415322,0000,02,2,460|0|27B3|EA7,A2F|3B9|3|0,940C7E,31.76|30.98*46"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/FlespiProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/FlespiProtocolDecoderTest.java
new file mode 100644
index 000000000..9e5a45a83
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/FlespiProtocolDecoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.HttpMethod;
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class FlespiProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        FlespiProtocolDecoder decoder = new FlespiProtocolDecoder(null);
+
+        verifyPositions(decoder, request(HttpMethod.POST, "/",
+            buffer("[{\"position.speed\":0,\"position.latitude\":53.90573,\"time.valid.status\":true,\"timestamp\":1506956075,\"position.satellites\":10,\"message.buffered.status\":false,\"business.mode.status\":true,\"gps.status\":true,\"position.longitude\":27.455848,\"position.direction\":0,\"ident\":\"605630\"},{\"siren.status\":false,\"business.mode.status\":true,\"position.satellites\":8,\"timestamp\":1506695785,\"led.status\":false,\"position.latitude\":53.905569,\"position.longitude\":27.455986,\"position.speed\":0,\"gradual.stop.status\":false,\"position.direction\":262.643854,\"hardware.version.enum\":223,\"vehicle.mileage\":160,\"message.buffered.status\":false,\"blinkers.status\":false,\"ident\":\"605630\",\"position.altitude\":233.48,\"immobilizer.status\":false}]")));
+
+        verifyPositions(decoder, request(HttpMethod.POST, "/",
+            buffer("[{\"geofence.inside.status\":false,\"position.valid\":false,\"ain#4\":0,\"rs232.sensor.value#1\":0,\"position.direction\":0,\"rs232.sensor.value#0\":0,\"position.speed\":0,\"position.latitude\":10.11223,\"refrigerator.sensor.temperature#1\":62.5,\"gnss.antenna.cut.status\":true,\"din\":3,\"ain#3\":0,\"refrigerator.sensor.temperature#3\":71.4,\"position.altitude\":0,\"shock.event.trigger\":false,\"alarm.mode.status\":false,\"ibutton.event.connect\":false,\"refrigerator.sensor.temperature#4\":66.7,\"internal.battery.voltage.limit.lower.status\":false,\"ain#2\":0,\"gsm.signal.level\":0,\"refrigerator.connection.status\":0,\"position.satellites\":0,\"external.powersource.voltage.range.outside.status\":false,\"refrigerator.sensor.temperature#2\":68.2,\"incline.event.trigger\":false,\"alarm.event.trigger\":false,\"movement.status\":true,\"refrigerator.sensor.temperature#6\":68.9,\"ident\":\"605630\",\"timestamp\":946684840,\"engine.ignition.status\":true,\"gsm.sim.status\":true,\"record.seqnum\":8165,\"external.powersource.voltage\":15.298,\"gnss.enum\":\"glonass\",\"position.longitude\":20.88774,\"battery.voltage\":4.088,\"refrigerator.sensor.temperature#5\":71.3,\"ain#1\":0,\"internal.bus.supply.voltage.range.outside.status\":false},{\"geofence.inside.status\":false,\"position.valid\":true,\"ain#4\":0,\"rs232.sensor.value#1\":0,\"position.direction\":0,\"rs232.sensor.value#0\":0,\"position.speed\":0,\"position.latitude\":57.986744,\"refrigerator.sensor.temperature#1\":74.1,\"gnss.antenna.cut.status\":false,\"ain#3\":0,\"position.hdop\":21.1,\"refrigerator.sensor.temperature#3\":71.4,\"position.altitude\":219,\"shock.event.trigger\":false,\"alarm.mode.status\":false,\"ibutton.event.connect\":false,\"refrigerator.sensor.temperature#4\":70.5,\"internal.battery.voltage.limit.lower.status\":false,\"ain#2\":0,\"gsm.signal.level\":0,\"refrigerator.connection.status\":0,\"position.satellites\":5,\"external.powersource.voltage.range.outside.status\":false,\"refrigerator.sensor.temperature#2\":71.3,\"incline.event.trigger\":false,\"alarm.event.trigger\":false,\"movement.status\":true,\"refrigerator.sensor.temperature#6\":69.3,\"ident\":\"605630\",\"timestamp\":1392272112,\"engine.ignition.status\":true,\"gsm.sim.status\":true,\"record.seqnum\":8174,\"external.powersource.voltage\":15.303,\"gnss.enum\":\"glonass\",\"position.longitude\":56.207576,\"battery.voltage\":3.934,\"refrigerator.sensor.temperature#5\":68.1,\"ain#1\":0,\"internal.bus.supply.voltage.range.outside.status\":false}]")));
+
+        verifyPositions(decoder, request(HttpMethod.POST, "/",
+            buffer("[{\"ain#1\":1,\"ain#2\":0,\"ain#3\":0,\"ain#4\":0,\"alarm.event.trigger\":true,\"custom.SOS\":1,\"custom.dparam\":3.141593,\"custom.ign\":1,\"custom.iparam\":-55,\"custom.tparam\":\"lorem\",\"din\":722,\"dout\":1048576,\"ident\":\"namo:namo\",\"position.altitude\":300,\"position.direction\":0,\"position.hdop\":1.1,\"position.latitude\":53.90821,\"position.longitude\":27.524165,\"position.satellites\":7,\"position.speed\":0,\"timestamp\":1508508510.013227}]")));
+    }
+
+}
\ No newline at end of file
diff --git a/src/test/java/org/traccar/protocol/FlexCommProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/FlexCommProtocolDecoderTest.java
new file mode 100644
index 000000000..28ecaf646
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/FlexCommProtocolDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class FlexCommProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        FlexCommProtocolDecoder decoder = new FlexCommProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "7E00865067022408382201705302358271024932258006712785200700022601010224100040002C5002A2210001000000010012342107"));
+
+        verifyPosition(decoder, text(
+                "7E27865067022408382201705241211301024932197006712794000910022481008234100040002C5002A2200011000000006306941827"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/FlextrackProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/FlextrackProtocolDecoderTest.java
new file mode 100644
index 000000000..3f268fde9
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/FlextrackProtocolDecoderTest.java
@@ -0,0 +1,32 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+
+public class FlextrackProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        FlextrackProtocolDecoder decoder = new FlextrackProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "-1,LOGON,7000000123,8945000000"));
+
+        verifyNull(decoder, text(
+                "-1,LOGON,1080424008,8945020110126633198"));
+
+        verifyPosition(decoder, text(
+                "-2,UNITSTAT,20060101,123442,1080424008,N0.00.0000,E0.00.0000,0,0,0,4129,-61,2,23866,0,999,A214,63,2EE2,3471676"));
+
+        verifyPosition(decoder, text(
+                "-2,UNITSTAT,20050205,181923,7000004634,N55.46.0812,E009.21.1665,122,198,6,3934,-81,01A8,23802,213,55,37FD,45,0055,12878"),
+                position("2005-02-05 18:19:23.000", true, 55.76802, 9.35278));
+
+        verifyPosition(decoder, text(
+                "-2,UNITSTAT,20050205,181923,7000004634,N55.46.0812,E009.21.1665,122,198,6,3934,-81,01A8,23802,213,55,37FD,45,0055,12878"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/FoxProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/FoxProtocolDecoderTest.java
new file mode 100644
index 000000000..837b36b64
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/FoxProtocolDecoderTest.java
@@ -0,0 +1,30 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class FoxProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        FoxProtocolDecoder decoder = new FoxProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "<fox><gps id=\"10\" data=\"51,A,010416,085317,4444.4158,N,02025.4466,E,1,182,,1110111111110111 141 0 0 0 0 0 10010000 10142,018C81851800009B\"/></fox>"));
+
+        verifyPosition(decoder, text(
+                "<fox><gps id=\"90\" data=\"1092,V,010101,000004,0000.0000,N,00000.0000,E,0,0,,1111111111111111 123 0 0 0 0 0 00000000 47664,47664\"/></fox>"));
+
+        verifyPosition(decoder, text(
+                "<fox><gps id=\"90\" data=\"31,V,110316,125952,0000.0000,N,00000.0000,E,0,0,,1111111111111111 123 0 0 0 0 0 00000000 47664,65 60 60 60 60 60 60 60 65 65 55 55 60 60 60 60 60 60 60 60 55 55 60 55 65 60 60 60 60 60 60 55\"/></fox>"));
+
+        verifyPosition(decoder, text(
+                "<fox><gps id=\"90\" data=\"0,V,110316,130154,0000.0000,N,00000.0000,E,0,0,,1111111111111111 123 0 0 0 0 0 00000000 47664,47664 0\"/></fox>"));
+
+        verifyPosition(decoder, text(
+                "<fox><gps id=\"90\" data=\"0,A,110316,131834,4448.8355,N,02028.2021,E,0,217,,1111111111111111 123 0 0 0 0 0 00000000 50020,50020 0\"/></fox>"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/FreedomProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/FreedomProtocolDecoderTest.java
new file mode 100644
index 000000000..b2fc1fd8d
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/FreedomProtocolDecoderTest.java
@@ -0,0 +1,22 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class FreedomProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        FreedomProtocolDecoder decoder = new FreedomProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "IMEI,353358011714362,2014/05/22, 20:49:32, N, Lat:4725.9624, E, Lon:01912.5483, Spd:5.05"),
+                position("2014-05-22 20:49:32.000", true, 47.43271, 19.20914));
+
+        verifyPosition(decoder, text(
+                "IMEI,353358011714362,2014/05/22, 20:49:32, N, Lat:4725.9624, E, Lon:01912.5483, Spd:5.05"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/FreematicsProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/FreematicsProtocolDecoderTest.java
new file mode 100644
index 000000000..a84c4e357
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/FreematicsProtocolDecoderTest.java
@@ -0,0 +1,36 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class FreematicsProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        FreematicsProtocolDecoder decoder = new FreematicsProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "1#EV=2,TS=1871902,ID=ESP32305C06C40A24*AC"));
+
+        verifyNull(decoder, text(
+                "0#EV=1,TS=23930,ID=ID1C6606C40A24,SK=TEST_SERVER_KEY*49"));
+
+        verifyPositions(decoder, text(
+                "1#0:102560,20:0;0;0,24:425,10:4285580,A:-35.803696,B:175.748413,C:0.22,D:0.41,F:5,0:103174,20:0;0;0,24:423,10:4285660,A:-35.803696,B:175.748413,C:0.22,D:0.41,F:5,30:88193792*21"));
+
+        verifyPositions(decoder, text(
+                "1#0:49244,20:0;0;0,24:423,0:50779,20:0;0;0,24:425,30:32924444*38"));
+
+        verifyNotNull(decoder, text(
+                "1#0:47607,20:0;0;0,24:423,0:48732,20:0;0;0,24:428,10:4280140,A:0.000000,B:0.000000,C:0.00,D:18520000.00,F:2,30:32924444*BA"));
+
+        verifyPositions(decoder, text(
+                "1#0:68338,10D:79,30:1010,105:199,10C:4375,104:56,111:62,20:0;-1;95,10:6454200,A:-32.727482,B:150.150301,C:159,D:0,F:5,24:1250*7A"));
+
+        verifyPositions(decoder, text(
+                "1#0=68338,10D=79,30=1010,105=199,10C=4375,104=56,111=62,20=0;-1;95,10=6454200,A=-32.727482,B=150.150301,C=159,D=0,F=5,24=1250*7A"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/GalileoFrameDecoderTest.java b/src/test/java/org/traccar/protocol/GalileoFrameDecoderTest.java
new file mode 100644
index 000000000..4f4972895
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/GalileoFrameDecoderTest.java
@@ -0,0 +1,25 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assert.assertEquals;
+
+public class GalileoFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        GalileoFrameDecoder decoder = new GalileoFrameDecoder();
+
+        assertEquals(
+                binary("011780011102e603383633353931303238393630323437043200801c"),
+                decoder.decode(null, null, binary("011780011102e603383633353931303238393630323437043200801c")));
+
+        assertEquals(
+                binary("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"),
+                decoder.decode(null, null, binary("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")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/GalileoProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/GalileoProtocolDecoderTest.java
new file mode 100644
index 000000000..74612caab
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/GalileoProtocolDecoderTest.java
@@ -0,0 +1,45 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class GalileoProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        GalileoProtocolDecoder decoder = new GalileoProtocolDecoder(null);
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+        verifyNull(decoder, binary(
+                "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"));
+
+        verifyPositions(decoder, false, binary(
+                "01560003383636303530303338343337353836044701e000000000e13c494e414c4c3a696e303d31313230362c696e313d302c696e323d302c696e333d302c696e343d302c696e353d302c4163633d3536363932343732353bfdef"));
+
+        verifyPositions(decoder, false, binary(
+                "012a0003383633353931303233353137333732046600e000000000e1104f555428332e2e3029203d2031313130bb29"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+        verifyNull(decoder, binary(
+                "011380033836383230343030313534393038370432008590"));
+        
+        verifyPositions(decoder, binary(
+                "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"));
+        
+        verifyPositions(decoder, binary(
+                "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"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/GalileoProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/GalileoProtocolEncoderTest.java
new file mode 100644
index 000000000..34423578d
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/GalileoProtocolEncoderTest.java
@@ -0,0 +1,23 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+public class GalileoProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        GalileoProtocolEncoder encoder = new GalileoProtocolEncoder();
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_CUSTOM);
+        command.set(Command.KEY_DATA, "status");
+
+        verifyCommand(encoder, command, binary("01200003313233343536373839303132333435040000e000000000e1067374617475731f64"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/GatorProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/GatorProtocolDecoderTest.java
new file mode 100644
index 000000000..e2be99cb9
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/GatorProtocolDecoderTest.java
@@ -0,0 +1,50 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assert.assertEquals;
+
+public class GatorProtocolDecoderTest extends ProtocolTest {
+    
+    @Test
+    public void testDecodeId() {
+        
+        assertEquals("3512345006", GatorProtocolDecoder.decodeId(12, 162, 50, 134));
+        
+    }
+
+    @Test
+    public void testDecode() throws Exception {
+
+        GatorProtocolDecoder decoder = new GatorProtocolDecoder(null);
+
+        verifyAttributes(decoder, binary(
+                "2424800026364101b31608041108380273453415301532000000008000010000122800000124000000c40d"));
+
+        verifyNull(decoder, binary(
+                "242421000658e3d851150d"));
+
+        verifyAttributes(decoder, binary(
+                "242480002658e3d851a60101c662bc00000000000000000000000000470007a30b0c00b10fc900ff00460d"));
+
+        verifyNull(decoder, binary(
+                "242421000643e30282070d"));
+
+        verifyPosition(decoder, binary(
+                "24248000260009632d141121072702059226180104367500000000c04700079c0c34000ad80b00ff000a0d"),
+                position("2014-11-21 07:27:02.000", true, 59.37697, 10.72792));
+
+        verifyPosition(decoder, binary(
+                "24248100230CA23285100306145907022346901135294700000000C04001012C0E1100000021CB0D"));
+
+        verifyPosition(decoder, binary(
+                "2424800023c2631e00111220104909833268648703804100000000c0470000000b4e00000000550d"),
+                position("2011-12-20 10:49:09.000", true, -33.44773, -70.63402));
+
+        verifyPosition(decoder, binary(
+                "24248000260009632d141121072702059226180104367500000000c04700079c0c34000ad80b00ff000a0d"));
+        
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/GenxProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/GenxProtocolDecoderTest.java
new file mode 100644
index 000000000..373c8c49e
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/GenxProtocolDecoderTest.java
@@ -0,0 +1,36 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class GenxProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        GenxProtocolDecoder decoder = new GenxProtocolDecoder(null);
+
+        decoder.setReportColumns("28,2,3,4,13,17,10,23,27,11,7,8,46,56,59,70,74,75,77,89,90,93,99,107,112,113,114,176,175,178,181,182");
+
+        verifyPosition(decoder, text(
+                "000036004133,11/05/2017 00:03:45,45.54767,-73.75547,0,0,63,569.35,118,ON,10687,0,12,O,9,3669.000,95.0,0.0,1,107.9464,0.0065,583.752,43,0.00,28.26,7.60,NA,U,UUU,0,-95.0,U"));
+
+        decoder.setReportColumns("1,2,3,4");
+
+        verifyPosition(decoder, text(
+                "000036004130,08/31/2017 17:24:13,45.47275,-73.65491,5,19,117,1.14,147,ON,1462,0,6,N,0,0.000,-95.0,-1.0,0,0.0000,0.0000,0.000,0,0.00,0.00,0.00,NA,U,UUU,0,-95.0,U"));
+
+        verifyPosition(decoder, text(
+                "000036004130,08/31/2017 17:24:37,45.47257,-73.65506,3,0,117,1.14,124,ON,1489,0,5,N,0,0.000,-95.0,-1.0,0,0.0000,0.0000,0.000,0,0.00,0.00,0.00,NA,U,UUU,0,-95.0,U"));
+
+        decoder.setReportColumns("1,2,3,4,13,17,10,23,27,11,7,8,46,56,59,70,74,75,77,89,90,93,99,107,112,113,114,176,175,178,181,182");
+
+        verifyPosition(decoder, text(
+                "000036035855,04/16/2017 21:19:07,45.46485,-73.65424,24,32,61:213,342.51,157,ON,20984,0,12,O,18,0.000,95.0,24.0,1990,64.0894,0.0219,316.009,71,0.00,16.78,5.10,NA,U,UUU,0,-95.0,U"));
+
+        verifyPosition(decoder, text(
+                "000036004129,10/20/2017 00:54:27,43.44638,-79.68616,36,310,6,4954.40,321,ON,35377,0,12,O,13,0.000,85.6,36.0,1573,451.2514,0.0012,5260.953,0,0.00,122.48,33.17,NA,U,UUU,0,-95.0,U"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Gl100ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Gl100ProtocolDecoderTest.java
new file mode 100644
index 000000000..ffafcd7b1
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Gl100ProtocolDecoderTest.java
@@ -0,0 +1,56 @@
+package org.traccar.protocol;
+
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Gl100ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Gl100ProtocolDecoder decoder = new Gl100ProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "+RESP:GTLGL,359464030492644,1,2,1,0,0.4,0,299.7,1,5.455551,51.449776,20160311083229,0204,0016,03EC,BD94,00,0036,0102090501"));
+
+        verifyPosition(decoder, text(
+                "+RESP:GTTRI,359464030439249,1,0,61,1,0.0,346,-2.7,2,-80.392825,26.122424,20151214000354,0310,0260,72BC,35F5,00,04B6,0102070407"));
+
+        verifyPosition(decoder, text(
+                "+RESP:GTTRI,135790246811220,1,0,0,1,4.3,92,70.0,1,121.354335,31.222073,20090101000000,0460,0000,18d8,6141,00,11F0,0102070202"));
+
+        verifyPosition(decoder, text(
+                "+RESP:GTTRI,135790246811220,2,0,0,1,4.3,92,70.0,1,121.354335,31.222073,20090101000000,0460,0000,18d8,6141,00,1,-3.6,145,30.0,2,121.354442,31.221940,20090101000100,0460,0000,18d8,6141,00,11F0,0102070202"));
+
+        verifyNull(decoder, text(
+                "AT+GTHBD=HeartBeat,359231030000010,20090101000000,11F0,0102120204"));
+
+        verifyPosition(decoder, text(
+                "+RESP:GTSOS,359231030000010,0,0,0,1,4.3,92,70.0,1,121.354335,31.222073,20090101000000,0460,0000,18d8,6141,00,11F0,0102120204"),
+                position("2009-01-01 00:00:00.000", false, 31.22207, 121.35434));
+
+        verifyPosition(decoder, text(
+                "+RESP:GTRTL,359231030000010,0,0,0,1,4.3,92,70.0,1,121.354335,31.222073,20090101000000,0460,0000,18d8,6141,00,11F0,0102120204"));
+
+        verifyPosition(decoder, text(
+                "+RESP:GTEST,359231030000010,0,0,0,1,4.3,92,70.0,1,121.354335,31.222073,20090101000000,0460,0000,18d8,6141,00,11F0,0102120204"));
+
+        verifyPosition(decoder, text(
+                "+RESP:GTSZI,359231030000010,0,3,0,1,4.3,92,70.0,1,121.354335,31.222073,20090101000000,0460,0000,18d8,6141,00,11F0,0102120204"));
+
+        verifyPosition(decoder, text(
+                "+RESP:GTLBC,359231030000010,02132523415,1,4.3,92,70.0,1,121.354335,31.222073,20090101000000,0460,0000,18d8,6141,00,11F0,0102120204"));
+
+        verifyPosition(decoder, text(
+                "+RESP:GTTRI,359231030000010,1,0,0,1,4.3,92,70.0,1,121.354335,31.222073,20090101000000,0460,0000,18d8,6141,00,11F0,0102120204"));
+
+        verifyPosition(decoder, text(
+                "+RESP:GTTRI,359231030000010,2,0,0,1,4.3,92,70.0,1,121.354335,31.222073,20090101000000,0460,0000,18d8,6141,00,0,0,1,-3.6,145,30.0,2,121.354442,31.221940,20090101000100,0460,0000,18d8,6141,00,11F0,0102120204"));
+
+        verifyPosition(decoder, text(
+                "+RESP:GTTRI,359464030073766,1,0,0,0,1.7,254,-27.8,3,30.474475,50.488383,20131107155511,0255,0003,6995,4761,00,0071,0103090402"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Gl200BinaryProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Gl200BinaryProtocolDecoderTest.java
new file mode 100644
index 000000000..e6fb98340
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Gl200BinaryProtocolDecoderTest.java
@@ -0,0 +1,36 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Gl200BinaryProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Gl200BinaryProtocolDecoder decoder = new Gl200BinaryProtocolDecoder(null);
+
+        verifyPosition(decoder, binary(
+                "2b4556542d00fc1fbf0063450102020956325403000343056437f8220700000200000000010000160100f2007eff75a1f0025c6b1a07e1080108241a02680003189c1ac500000000000002100800000000000000000007e1080108241a19e24e4e0d0a"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+        verifyNotNull(decoder, binary(
+                "2B5253500300FC1FFF0064450102020867623130302D446F642F442105007018217345005F010100000001100045073C4D4101DB86BD07E106130B2B0F0460000018770013000000030000000106020F2300002714301107E106130B2B1003424EFB0D0A"));
+
+        verifyPositions(decoder, binary(
+                "2b5253500700fc1fbf005d4501020209563254030003430564377e42071001000000000000007eff75a151025c6a8107e10801081a2a02680003189c1ac500000000000002100700000000000000000007e1080108241019e17ebe0d0a"));
+
+        verifyAttributes(decoder, binary(
+                "2b494e4601fd7f0076676231303000000045010202090104020500004100054007e107150b061d0000003f010e02580000000000d0312a1013648935103226313921591f1200000000000302680003189c1ac3001b02680003189c1ac4000d02680003189c1ac5001207e107150b0d3704f658060d0a"));
+
+        verifyPosition(decoder, binary(
+                "2b4556540c00fc1fbf005c4501010108563254030003430564312a41090100000000003f007dff75a11a025c6a7807e1070a14041202680003189c1ac500000000000000000000000000000000000007e1070b041134054e5c6e0d0a"));
+
+        verifyNull(decoder, binary(
+                "2b41434b017f244501010108676231303000000000ffff07e1070b03112d054dfe030d0a"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Gl200FrameDecoderTest.java b/src/test/java/org/traccar/protocol/Gl200FrameDecoderTest.java
new file mode 100644
index 000000000..e90c6495a
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Gl200FrameDecoderTest.java
@@ -0,0 +1,29 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assert.assertEquals;
+
+public class Gl200FrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Gl200FrameDecoder decoder = new Gl200FrameDecoder();
+
+        assertEquals(
+                binary("2b41434b017f244501010108676231303000000000ffff07e1070b03112d054dfe030d0a"),
+                decoder.decode(null, null, binary("2b41434b017f244501010108676231303000000000ffff07e1070b03112d054dfe030d0a")));
+
+        assertEquals(
+                binary("2b4556540c00fc1fbf005c4501010108563254030003430564312a41090100000000003f007dff75a11a025c6a7807e1070a14041202680003189c1ac500000000000000000000000000000000000007e1070b041134054e5c6e0d0a"),
+                decoder.decode(null, null, binary("2b4556540c00fc1fbf005c4501010108563254030003430564312a41090100000000003f007dff75a11a025c6a7807e1070a14041202680003189c1ac500000000000000000000000000000000000007e1070b041134054e5c6e0d0a")));
+
+        assertEquals(
+                binary("2b524553503a47545354522c3430303330302c3836323336353033303134323238392c474c3530302c302c302c302c33392e342c39332c312c302e332c31372c3130352e382c32352e3934343234302c34342e3430333733362c32303137303532393134303533302c303232362c303030312c353643322c373038342c2c2c2c32303137303532393136303533302c30324441"),
+                decoder.decode(null, null, binary("2b524553503a47545354522c3430303330302c3836323336353033303134323238392c474c3530302c302c302c302c33392e342c39332c312c302e332c31372c3130352e382c32352e3934343234302c34342e3430333733362c32303137303532393134303533302c303232362c303030312c353643322c373038342c2c2c2c32303137303532393136303533302c3032444124")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Gl200TextProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Gl200TextProtocolDecoderTest.java
new file mode 100644
index 000000000..2fe860573
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Gl200TextProtocolDecoderTest.java
@@ -0,0 +1,390 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Position;
+
+public class Gl200TextProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Gl200TextProtocolDecoder decoder = new Gl200TextProtocolDecoder(null);
+
+        verifyAttribute(decoder, buffer(
+                "+RESP:GTPFA,F50201,866425030235982,GL300M,20190208124849,0BD4$"),
+                Position.KEY_ALARM, Position.ALARM_POWER_OFF);
+
+        verifyAttribute(decoder, buffer(
+                "+RESP:GTPNA,F50201,866425030235982,GL300M,20190208124909,0BD5$"),
+                Position.KEY_ALARM, Position.ALARM_POWER_ON);
+
+        verifyAttributes(decoder, buffer(
+                "+BUFF:GTSTC,410301,864802030022424,,,0,,,,,,,0228,0002,4EE8,1BFF489,00,20181207134332,EC90$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,1A0900,860599000306845,G3-313,0,0,4,1,2.1,0,426.7,8.611466,47.681639,20181214134603,0228,0001,077F,4812,25.2,1,5.7,34,437.3,8.611600,47.681846,20181214134619,0228,0001,077F,4812,25.2,1,4.4,62,438.2,8.611893,47.681983,20181214134633,0228,0001,077F,4812,25.2,1,4.8,78,436.6,8.612236,47.682040,20181214134648,0228,0001,077F,4812,25.2,83,20181214134702,0654$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTCAN,270703,867162025056839,gv300w,0,1,E07FFFFF,,2,H9307659,368713.50,1291,90,91,,P82.40,,61,10.10,6.76,3.34,524.08,,,0000,,00,,,007FFFFF,,,,,,,,,,,,,,,,,,,,,0000,2,0,,,0,88.6,104,117.6,-116.886007,32.543697,20181031202959,0334,0020,5234,7FCC3D0,00,20181031203002,9F50$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTERI,310701,863286023712855,,00000004,28378,10,1,1,0.0,294,358.4,14.271475,50.110771,20181111185001,0230,0003,94D4,3B30,00,14.5,,,,110000,2,0,C03FFFFF,,0,H46400,12310.70,0,0,83,,,,0,,0.53,3.43,,,,40,,0,,,20181111185252,2DFF"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTCAN,310701,863286023712855,,10,0,003FFFFF,,2,H46358,12305.50,601,0,83,,P53.00,,0,2749.15,0.19,2.80,,,,40,,0,,,20181110103016,2945$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTCAN,310701,863286023712855,,10,0,203FFFFF,,2,H46358,12305.50,601,0,83,,P53.00,,0,2749.15,0.19,2.80,,,,40,,0,,,007FFFFF,,,,,,0,,,134,37,6,0.19,,0.00,0,,,,,,0,0,0,20181110112126,299F$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTCAN,310701,863286023712855,,10,0,E03FFFFF,,2,H46358,12305.50,601,0,83,,P53.00,,0,2749.15,0.19,2.80,,,,40,,0,,,007FFFFF,,,,,,0,,,134,37,6,0.19,,0.00,0,,,,,,0,0,0,0,0.0,312,358.4,14.271460,50.110796,20181110103130,0230,0003,94D4,3B30,00,20181110105348,2969$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,1F0301,862193022001432,WF0GXXGBBGBM26503,,14900,41,1,1,11.6,74,356.0,14.120023,50.167894,20181104080703,0230,0003,9B14,5891,00,74.1,,,,83,220000,799,7.3,,20181104080703,099B$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTCAN,4B0201,867995030001575,,10,0,C03FFFFF,,0,H0,,,,,,,,,,0.00,0.03,,,,0,,0,,,0,10.0,310,404.3,14.096743,50.143363,20181102110535,0230,0003,9B14,5066,00,20181102112101,03E0$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTSTR,440502,866427030112088,GL530,0,0,2,,100,3,0.6,0,127.5,2.413963,48.877096,20180704180102,0208,0001,0310,E625,,,0000,20180704180100,004C$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTLSW,300500,860599002636595,,0,0,0,0.0,0,2886.5,-78.467145,-0.165335,20180518221815,,,,,,20180518221817,B6FD$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTLSW,300500,860599002636595,,0,1,0,0.0,0,2886.5,-78.467145,-0.165335,20180518221818,,,,,,20180518221819,B6FF$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTTSW,1A0100,135790246811220,,1,0,0,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,00,20100214093254,11F0$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTLSW,1A0100,135790246811220,,0,1,0,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,00,20100214093254,11F0$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTIGF,270302,867162025085234,,3519,0,0.0,92,111.2,-116.867638,32.450321,20180327070835,0334,0020,2B24,52CC3DE,00,,243.1,20180327070837,2A98$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTDIS,270302,867162025086950,,,21,1,1,0.0,81,117.8,-116.862025,32.453497,20180309084516,0334,0020,2B24,52CA916,00,1286.2,20180309084517,357E$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTIGL,270302,867162025085234,,,01,1,1,0.0,92,111.2,-116.867638,32.450321,20180327070838,0334,0020,2B24,52CC3DE,00,243.1,20180327070839,2A9A$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTERI,310603,863286023345490,,00000002,,10,1,2,0.3,0,155.7,8.000000,52.000000,20171215213040,0262,0002,1450,9F13,00,1130.3,00539:27:19,,,110000,2,1,28FFD5239115034E,1,,20171215213041,27C7$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTERI,250C02,868789023691057,,00000019,,10,1,1,0.0,196,2258.0,-99.201807,19.559242,20180214002957,0334,0003,235B,7F8D,00,6786.7,,,,100,110000,1,0394,1,4,100.0,100.0,20180214003006,C72B$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTCAN,310603,863286023335723,gv65,00,1,C03FFFFF,,0,,719601.00,,,,,,,,274.99,179.02,95.98,84761.00,,,0,,0,,,0,0.0,216,29.8,-2.155296,51.899400,20180209172714,0234,0010,53F3,8D38,00,20180211002128,E94E$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTCAN,310201,153759012347650,gv65,0,1,C03FFFFF,,2,H89394,63.14,200,0,87,,P43.60,0,0,17.53,11.61,5.92,0.00,0,0,4002,0,1,0.76,35.00,0,,,,0,0,,0000,0000,0000,0000,00,20040101000052,05A6$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTCAN,310603,863286023346480,gv65,00,1,C03FFFFF,,2,H2843820,373.76,1440,44,77,M23,P35.00,1810,,59.48,42.68,16.80,15.42,,,610,,0,,,0,42.7,263,27.2,-2.156478,51.899989,20171021151805,0234,0010,15D6,9AD2,00,20171021151807,0B28$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTCAN,310603,863286023346480,gv65,02,1,C03FFFFF,,0,H2843820,373.80,0,4,75,M12,,1800,,59.49,42.69,16.80,15.42,,,0,,0,,,0,0.7,75,24.3,-2.155148,51.899400,20171021151837,0234,0010,15D6,9AD2,00,20171021152355,0B2E$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTERI,380603,869606020025833,gv65,00000002,12003,10,1,1,0.0,172,24.6,-81.931875,26.577439,20171002045352,0310,0260,72BD,8E5B,00,1052.1,01383:52:12,0,100,210700,2,1,28FF4560A3150483,1,05B0,20171002045402,9548$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTINF,04040E,861074023747143,gv200,41,8959301000648637556f,24,0,1,0,1,4.4,0,1,0,0,20170912221854,0,00,01,-0500,1,20170912193448,1D5B$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTINF,210102,354524044950583,,42,89011702272048900184,11,99,0,,,4.08,0,1,1,0,0,20170831170831,87,0.00,,,,20170831171010,0064$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTOBD,360701,864251020253807,LSGTC58UX7Y067312,GV500,0,70FFFF,LSGTC58UX7Y067312,1,12309,983A8140,0,0,33,nan,,0,0,0,,10,0,,0,4.4,0,83.7,36.235142,49.967324,20170829112348,0255,0001,2760,9017,00,690.1,20170829112400,3456$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTERI,060502,861074023620928,,00000002,27822,10,1,1,0.0,84,2870.9,-78.531796,-0.277329,20170825045344,,,,,,0.0,01138:30:24,,,83,220104,2,1,28FF2776A2150308,1,FFAD,0,20170825045348,A88C$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTINF,280500,A1000043D20139,GL300VC,41,,31,0,0,,,3.87,0,1,1,,,20170802150751,70,,48.0,,,20170802112145,03AC$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTINF,2D0300,A1000043D20139,1G1JC5444R7252367,,11,,31,0,1,12986,,4.16,0,2,,,20170802145640,,,,,,+0000,0,20170802145643,CD5A$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTMPN,450102,865084030001323,gb100,0,1.6,0,-93.1,121.393023,31.164105,20170619103113,0460,0000,1806,2142,00,20170619103143,0512$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTTRI,862370030005908,1,0,99,1,0.0,354,18.5,18.821100,-34.084002,20170607152024,0655,0001,00DD,1CAE,00,0103010100,20170607172115,3E7D$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTERI,060800,861074023677175,,00000002,12351,10,1,1,0.0,0,2862.4,-78.467273,-0.164998,20170529181717,,,,,,0.0,00259:11:50,,,0,210104,2,1,28E17436060000E2,1,015F,0,20170529181723,2824$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTSWG,110100,358688000000158,,1,0,2.1,0,27.1,121.390717,31.164424,20110901073917,0460,0000,1878,0873,,20110901154653,0015$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTTMP,110100,358688000000158,,2,60,1,1,4.3,92,70.0,121.354335,31.222073,20110214013254,0460,0000,18d8,6141,00,80,20110214093254,000F$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTSTT,110100,358688000000158,,41,0,4.3,92,70.0,121.354335,31.222073,20110214013254,0460,0000,18d8,6141,,20110214093254,0022$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTBPL,110100,358688000000158,,3.53,0,4.3,92,70.0,121.354335,31.222073,20110214013254,0460,0000,18d8,6141,,20110214093254,001F$"));
+
+        verifyNotNull(decoder, buffer(
+                "+BUFF:GTIGL,060228,862894020180553,,,00,1,1,3.4,199,409.6,-63.174466,-17.739317,20170407121823,0000,0000,0000,0000,00,15989.5,20170407081824,9606$"));
+
+        verifyNotNull(decoder, buffer(
+                "+RESP:GTFRI,060228,862894020180553,,14827,10,1,1,3.4,199,409.6,-63.174466,-17.739317,20170407121823,0000,0000,0000,0000,00,15989.5,01070:43:13,13,180,0,220101,,,,20170407081824,9607$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTERI,060502,861074023376992,,00000002,27239,10,1,1,0.2,312,183.3,-79.320820,-2.499110,20170401212005,0740,0000,EE4E,C98F,00,0.0,02114:36:35,,,90,220504,2,0,0,20170401212007,9E3D$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,060502,861074023689626,,25202,10,1,1,0.0,0,2744.1,-78.261047,0.023452,20170401211940,,,,,,0.0,00079:19:15,,,51,110000,,,,20170401212003,4DA7$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,060100,135790246811220,,,00,1,1,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,00,2000.0,12345:12:34,,,80,210100,,,,20090214093254,11F0$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTERI,06020B,862170010196747,,00000000,,10,1,2,1.8,0,-2.5,117.198440,31.845219,20120802061037,0460,0000,5663,0358,00,0.0,,,,0,410000,20120802061040,0012$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTERI,060502,861074023692562,,00000002,14197,10,1,1,0.2,220,491.8,-79.064212,-2.159754,20170401212007,0740,0000,EE49,CE25,00,0.0,01509:10:58,,,87,220104,2,0,0,20170401212010,D14D$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,210102,354524044925825,,1,1,1,29,2.8,0,133.7,-90.203063,32.265473,20170318005208,,,,,10800,4,20170318005208,0002$"));
+
+        verifyPositions(decoder, false, buffer(
+                "+RESP:GTFRI,210102,354524044925825,,1,1,1,,,,,,,,310,410,51bc,ca1dae6,10800,1,20170318214333,0002$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTGSM,400201,862365030025161,STR,0234,0015,003a,62a2,16,,0234,0015,003a,56a2,14,,0234,0015,003a,062a,13,,0234,0015,003a,32d9,11,,0234,0015,003a,56a0,11,,,,,,,,0234,0015,003a,7489,17,,20170219200048,0033$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTGSM,400201,862365030025161,STR,0234,0015,003a,56a2,18,,0234,0015,003a,77bc,14,,0234,0015,003a,32d9,12,,0234,0015,003a,062a,12,,0234,0015,003a,62a2,11,,0234,0015,003a,56a0,10,,0234,0015,003a,7489,15,,20170219080049,0030$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTGSM,400201,862365030034940,STR,0234,0030,0870,2469,19,,0234,0030,0870,35ee,18,,0234,0030,0870,16ac,12,,0234,0030,0870,16b2,11,,0234,0030,0870,360f,6,,0234,0030,0870,165d,6,,0234,0030,0870,35ef,17,,20170215220049,008D$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTSTR,400201,862365030034940,GL500,0,0,2,21.1,86,0,1.6,0,5.8,0.622831,51.582688,20170215090422,0234,0030,0870,35EF,,,,20170215220049,008C$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,2C0402,867162020000816,,0,0,1,2,0.3,337,245.7,-82.373387,34.634011,20170215003054,,,,,,63,20170215003241,3EAB$"));
+
+        verifyNotNull(decoder, buffer(
+                "+RESP:GTWIF,210102,354524044608058,,4,c413e200ff14,-39,,,,c413e2010e55,-39,,,,c8d3ff04a837,-43,,,,42490f997c6d,-57,,,,,,,,100,20170201020055,0001$"));
+
+        verifyNotNull(decoder, buffer(
+                "+RESP:GTWIF,210102,354524044484948,,1,08626693fb98,-36,,,,,,,,97,20170119071300,05E3$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTINF,210102,A100004D9EF2AE,,41,,8,99,0,17.7,21,3.58,0,1,1,0,0,20161216135038,4,,,,,20161216135038,00AB$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTSTR,400201,862365030034957,GL500,0,0,2,23.1,5,2,0.2,0,36.0,0.623089,51.582744,20161129174625,0234,0015,03C3,3550,,,,20161129174625,0026$"));
+
+        verifyNotNull(decoder, buffer(
+                "+RESP:GTSTR,400201,862365030034957,GL500,0,1,2,21.8,100,0,,,,,,,0234,0015,03C3,3550,,,,20161129174009,0023$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTINF,210102,A10000499AEF9B,,41,,0,0,0,15.0,9,3.87,0,1,1,0,0,20161101140211,72,,,,,20161101140211,00A3$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTNMR,210102,A10000499AEF9B,,0,0,1,9,0.0,0,288.0,-76.902364,39.578828,20161101134145,,,,,00,73,20161101134145,009F$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,210102,A10000499AEF9B,,0,1,1,9,0.5,0,288.0,-76.902364,39.578828,20161101134124,,,,,00,73,20161101134123,009D$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTRTL,210102,A10000499AEF9B,,0,0,1,10,0.2,0,305.4,-76.902274,39.578517,20161101155001,,,,,00,73,20161101155001,00A6$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTINF,110100,358688000000158,,41,898600810906F8048812,18,99,0,33.23,1,4.19,1,1,1,0,0,20110714104934,100,,,,,20110714104934,0014$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTINF,080100,135790246811220,,16,898600810906F8048812,16,0,1,11870,,4.1,0,0,0,,20090214013254,,12340,,00,00,+0800,0,20090214093254,11F0$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTINF,040100,135790246811220,,16,898600810906F8048812,16,0,1,,0,4.4,0,0,0,0,20090214013254,13000,00,00,+0800,0,20090214093254,11F0$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTINF,060100,135790246811220,,16,898600810906F8048812,16,0,1,12000,,4.4,0,0,0,0,20090214013254,0,1300,2000,00,00,+0800,0,20090214093254,11F0$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTINF,1A0800,860599000773978,GL300,41,89701016426133851978,17,0,1,26.6,,3.90,1,1,0,0,0,20161003184043,69,1,44,,,20161004040811,022C$"));
+
+        verifyAttributes(decoder, buffer(
+                "+BUFF:GTINF,1A0800,860599000773978,GL300,41,89701016426133851978,23,0,1,204.7,,3.84,1,1,0,0,0,20161006072548,62,1,38,,,20161006082343,0C98$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,360100,864251020141408,3VWGW6AJ0FM237324,gv500,,10,1,1,0.0,0,2258.4,-99.256948,19.555800,20160929214743,0334,0020,0084,65AC,00,0.0,,,,100,410000,0,nan,,20160929214743,13BA$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTOBD,360201,864251020186064,4T1BE46KX7U018210,,0,19FFFF,4T1BE46KX7U018210,1,14283,983901C0,799,36,18,,33792,0,0,0,,,38,,6,53557,0,0.0,0,219.5,-76.661456,39.832588,20160507132153,20160507132154,0230$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,360201,864251020186064,1G1JC5444R7252367,,12802,10,1,0,0.0,0,219.5,-76.661456,39.832588,20160507132235,,,,,,20460.9,00080:03:37,,,100,210000,791,,56,20160507132239,0233$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,1F0101,135790246811220,1G1JC5444R7252367,,,00,2,1,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,00,0,4.3,92,70.0,121.354335,31.222073,20090101000000,0460,0000,18d8,6141,00,2000.0,12345:12:34,,,80,210100,,,50,20090214093254,11F0$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,1F0101,135790246811220,1G1JC5444R7252367,,,00,1,1,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,00,2000.0,12345:12:34,,92,80,210100,,,50,20090214093254,11F0$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTSTT,060228,862894020178276,,21,0,0.0,0,411.3,-63.169745,-17.776330,20160319132220,0736,0003,6AD4,5BAA,00,20160319092223,1FBD$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTNMR,210102,A10000458356CE,,0,1,1,9,0.0,8,190.7,-85.765865,42.894837,20160316123202,,,,,60,30,20160316123202,0137$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTIDA,060228,862894020178276,,,01C68011010000C7,1,1,0,0.0,0,413.0,-63.169675,-17.776349,20160317222129,0736,0003,6AD4,32CF,00,34.9,,,,,20160317182130,1626$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTIGN,060228,862894020180553,,9860,0,0.2,189,420.0,-63.158195,-17.800608,20160309022951,0736,0003,6AD4,3471,00,,881.2,20160308222956,129A$"));
+
+        verifyPosition(decoder, buffer(
+                "+BUFF:GTIGF,060228,862894020180553,,1958,0,0.0,240,390.3,-63.089213,-17.764712,20160309122854,0736,0003,6AB8,5A23,00,,936.8,20160309082858,1368$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,060228,862894020180553,,,10,1,1,20.0,147,329.7,-62.899703,-17.720434,20160309113548,0736,0003,6AAE,3381,00,913.3,,,,0,220101,,,,20160309073554,132B$"));
+
+        verifyPositions(decoder, buffer(
+                "+BUFF:GTFRI,060402,862894021808798,,,10,1,1,0.0,349,394.3,-63.287717,-17.662410,20160116234031,0736,0003,6ABA,8305,00,3326.8,,,,94,220100,,,,20160116194035,4D83"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,2C0204,867162020003125,GL300W,0,0,2,1,1.7,205,2867.0,-78.481127,-0.206828,20160215210433,0740,0000,7596,5891C,0.0,1,1.7,205,2867.0,-78.481127,-0.206828,20160215210503,0740,0000,7596,5891C,0.0,88,20160215210506,1E78$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,060228,862894020178276,,15153,10,1,1,0.0,0,431.7,-63.169571,-17.776235,20160210153458,0736,0003,6AD4,80EF,00,34.9,00117:31:26,13442,15163,0,210101,,,,20160210113503,38EE$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,110100,A5868800000015,,0,0,1,1,4.3,92,70.0,121.354335,31.222073,20110214013254,0460,0000,18d8,6141,00,80,20110214013254,000C"));
+
+        verifyNotNull(decoder, buffer(
+                "+RESP:GTFRI,210102,A10000458356CE,,0,1,1,15,1.4,0,190.6,-85.765763,42.894896,20160208164505,4126,210,0,18673,00,92,20160208164507,00A6"));
+
+        verifyPositions(decoder, buffer(
+                "+BUFF:GTFRI,060402,862894021808798,,,10,1,1,0.0,349,394.3,-63.287717,-17.662410,20160116234031,0736,0003,6ABA,8305,00,3326.8,,,,94,220100,,,,20160116194035,4D83"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTIDA,06020A,862170013895931,,,D2C4FBC5,1,1,1,0.8,0,22.2,117.198630,31.845229,20120802121626,0460,0000,5663,2BB9,00,0.0,,,,,20120802121627,008E$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTINF,1F0101,135790246811220,1G1JC5444R7252367,,16,898600810906F8048812,16,0,1,12000,,4.2,0,0,,,20090214013254,,,,,,+0800,0,20090214093254,11F0$"));
+
+        verifyPositions(decoder, false, buffer(
+                "+RESP:GTFRI,120113,555564055560555,,1,1,1,,,,,,,,0282,0380,f080,cabf,6900,79,20140824165629,0001$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,0F0106,862193020451183,,,10,1,1,0.0,163,,-57.513617,-25.368191,20150918182145,,,,,,21235.0,,,,0,210100,,,,20150918182149,00B8$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTOBD,1F0109,864251020135483,,gv500,0,78FFFF,,1,12613,,,,,,,,,,,,,,1286,0,0.0,0,17.1,3.379630,6.529701,20150813074639,0621,0030,51C0,A2B3,00,0.0,20150813074641,A7E6$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTOBD,1F0109,864251020135483,4T1BE46KX7U018210,gv500,0,78FFFF,4T1BE46KX7U018210,1,13411,981B81C0,787,3,43,,921,463,1,10,0300030103030304001200310351035203530354,20,55,,1286,0,6.5,74,21.6,3.379710,6.529714,20150813074824,0621,0030,51C0,A2B3,00,0.0,20150813074828,A7E9$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTSTT,1A0401,860599000508846,,41,0,0.0,84,107.5,-76.657998,39.497203,20150623160622,0310,0260,B435,3B81,,20150623160622,0F54$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,1A0401,860599000508846,,0,0,1,1,134.8,154,278.7,-76.671089,39.778885,20150623154301,0310,0260,043F,7761,,99,20150623154314,0F24$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,1A0200,860599000165464,CRI001,0,0,1,2,,41,,-71.153137,42.301634,20150328020301,,,,,280.3,55,20150327220351,320C"));
+        
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,02010D,867844001675407,,0,0,1,2,0.0,0,28.9,8.591011,56.476397,20140915213209,0238,0001,03CB,2871,,97,20140915213459,009A"));
+
+        verifyNull(decoder, buffer(
+                "+RESP:GTINF,359464030073766,8938003990320469804f,18,99,100,1,0,+2.00,0,20131018084015,00EE,0103090402"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,04040C,359231038939904,,,10,1,2,0.0,117,346.0,8.924243,50.798077,20130618122040,0262,0002,0299,109C,00,0.0,,,,,,,,,20130618122045,00F6"));
+        
+        verifyPosition(decoder, buffer(
+                "+RESP:GTSTT,04040C,359231038939904,,42,0,0.0,117,346.0,8.924243,50.798077,20130618125152,0262,0002,0299,109C,00,20130618125154,017A"));
+        
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,020102,000035988863964,,0,0,1,1,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,00,,20090214093254,11F0"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,020102,135790246811220,,0,0,1,1,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,00,,20090214093254,11F0"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,020102,135790246811220,,0,0,2,1,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,00,0,4.3,92,70.0,121.354335,31.222073,20090101000000,0460,0000,18d8,6141,00,,20090214093254,11F0"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTDOG,020102,135790246811220,,0,0,1,1,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,00,2000.0,20090214093254,11F0"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTLBC,020102,135790246811220,,+8613800000000,1,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,00,,20090214093254,11F0"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTGCR,020102,135790246811220,,3,50,180,2,0.4,296,-5.4,121.391055,31.164473,20100714104934,0460,0000,1878,0873,00,,20100714104934,000C"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTFRI,07000D,868487001005941,,0,0,1,1,0.0,0,46.3,-77.039627,38.907573,20120731175232,0310,0260,B44B,EBC9,0015e96913a7,-58,,100,20120731175244,0114"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTHBM,0F0100,135790246811220,,,10,1,1,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,00,2000.0,20090214093254,11F0$"));
+
+        verifyPosition(decoder, buffer(
+                "+RESP:GTHBM,0F0100,135790246811220,,,11,1,1,24.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,00,2000.0,20090214093254,11F0$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,02010C,867844001274144,,0,0,1,1,18.0,233,118.1,7.615551,51.515600,20140106130516,0262,0007,79E6,B956,,72,20140106140524,09CE$"));
+        
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,02010C,867844001274649,,0,0,1,1,0.0,0,122.5,7.684216,51.524512,20140106233722,0262,0007,79EE,1D22,,93,20140107003805,03C4$"));
+
+        verifyPositions(decoder, buffer(
+                "+BUFF:GTFRI,210101,863286020016706,,,10,1,1,,,,49.903915,40.391669,20140818105815,,,,,,,,,,,210100,,,,,000C$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,240100,135790246811220,,,10,1,1,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,00,2000.0,12345:12:34,,80,,,,,,20090214093254,11F0$"));
+
+        verifyPositions(decoder, buffer(
+                "+RESP:GTFRI,240100,135790246811220,,,10,2,1,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,00,0,4.3,92,70.0,121.354335,31.222073,20090101000000,0460,0000,18d8,6141,00,2000.0,12345:12:34,,,80,,,,,20090214093254,11F0$"));
+
+        verifyNotNull(decoder, buffer(
+                "+RESP:GTSTT,280100,A1000043D20139,,42,0,0.1,321,228.6,-76.660884,39.832552,20150615120628,0310,0484,00600019,0A52,,20150615085741,0320$"));
+
+        verifyNotNull(decoder, buffer(
+                "+RESP:GTRTL,280100,A1000043D20139,,0,0,1,1,0.1,321,239.1,-76.661047,39.832501,20150615114455,0310,0484,00600019,0A52,,87,20150615074456,031E$"));
+        
+        verifyAttributes(decoder, buffer(
+                "+BUFF:GTBPL,1A0800,860599000773978,GL300,3.55,0,0.0,0,257.1,60.565437,56.818277,20161006070553,,,,,204.7,20161006071028,0C75$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTTEM,1A0102,860599000000448,,3,33,0,5.8,0,33.4,117.201191,31.832502,20130109061410,0460,0000,5678,2079,,20130109061517,0091$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTJDR,0A0102,135790246811220,,0,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,00,20090214093254,11F0$"));
+
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTJDS,0A0102,135790246811220,,2,0,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,00,20090214093254,11F0$"));
+        
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTSOS,020102,135790246811220,,0,0,1,1,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,00,,20090214093254,11F0$"));
+        
+        verifyAttributes(decoder, buffer(
+                "+RESP:GTVER,1A0800,860599000773978,GL300,GL300,0A03,0103,20161007041531,10F8$"));
+
+        verifyNull(decoder, buffer(
+                "+ACK:GTHBD,1A0401,135790246811220,,20100214093254,11F0"));
+
+        verifyAttributes(decoder, buffer(
+                "+ACK:GTRTO,1A0800,860599000773978,GL300,VER,FFFF,20161006053520,0C19"));
+
+        verifyAttributes(decoder, buffer(
+                "+ACK:GTJDC,0A0102,135790246811220,,0016,20090214093254,11F0"));
+
+        verifyAttributes(decoder, buffer(
+                "+ACK:GTGEO,1A0102,135790246811220,,0,0008,20100310172830,11F0"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/GlobalSatProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/GlobalSatProtocolDecoderTest.java
new file mode 100644
index 000000000..9746845a0
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/GlobalSatProtocolDecoderTest.java
@@ -0,0 +1,56 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class GlobalSatProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        GlobalSatProtocolDecoder decoder = new GlobalSatProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "GSh,131826789036289,3,M,ea04*3d"));
+
+        decoder.setFormat0("SORPZAB27GHKLMN*U!");
+
+        verifyPosition(decoder, text(
+                "GSr,011412001878820,4,5,00,,1,250114,105316,E00610.2925,N4612.1824,0,0.02,0,1,0.0,64*51!"));
+
+        verifyPosition(decoder, text(
+                "GSr,357938020310710,,4,04,,1,170315,060657,E00000.0000,N0000.0000,148,0.00,0,0,0.0,11991mV*6c!"));
+
+        decoder.setFormat0("TSPRXAB27GHKLMnaicz*U!");
+
+        verifyPosition(decoder, text(
+                "GSr,1,135785412249986,01,I,EA02,3,230410,153318,E12129.2839,N2459.8570,0,1.17,212,8,1.0,12.3V*55"));
+
+        verifyPosition(decoder, text(
+                "GSr,GTR-128,012896009148443,0040,5,0080,3,190813,185812,W11203.3661,N3330.2104,344,0.24,78,9,0.8,60%,0,0,12,\"310,410,0bdd,050d,02,21\",\"310,410,0bdd,0639,24,7\"*79"));
+
+        verifyPosition(decoder, text(
+                "$355632004245866,1,1,040202,093633,E12129.2252,N2459.8891,00161,0.0100,147,07,2.4"));
+
+        verifyPosition(decoder, text(
+                "$355632000959420,9,3,160413,230536,E03738.4906,N5546.3148,00000,0.3870,147,07,2.4"));
+        
+        verifyPosition(decoder, text(
+                "$353681041893264,9,3,240913,100833,E08513.0122,N5232.9395,181.3,22.02,251.30,9,1.00"));
+
+        decoder.setFormat0("SPRXYAB27GHKLMmnaefghiotuvwb*U!");
+        
+        verifyPosition(decoder, text(
+                "GSr,GTR-128,013227006963064,0080,1,a080,3,190615,163816,W07407.7134,N0440.8601,2579,0.01,130,12,0.7,11540mV,0,77,14,\"732,123,0744,2fc1,41,23\",\"732,123,0744,2dfe,05,28\",\"732,123,0744,272a,15,21\",\"732,123,0744,2f02,27,23\"*3b!"));
+
+        verifyPosition(decoder, text(
+                "$80050377796567,0,13,281015,173437,E08513.28616,N5232.85432,222.3,0.526,,07*37"),
+                position("2015-10-28 17:34:37.000", true, 52.54757, 85.22144));
+
+        verifyPosition(decoder, text(
+                "$80050377796567,0,18,281015,191919,E08513.93290,N5232.42141,193.4,37.647,305.40,07*37"),
+                position("2015-10-28 19:19:19.000", true, 52.54036, 85.23222));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/GnxProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/GnxProtocolDecoderTest.java
new file mode 100644
index 000000000..91aca50c8
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/GnxProtocolDecoderTest.java
@@ -0,0 +1,30 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class GnxProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        GnxProtocolDecoder decoder = new GnxProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$GNX_MIF,865733022354161,143,0,172642,180316,172642,180316,1,13.034581,N,080.234521,E,0,05396274,ROUTE_2#########,Deo ############,GNX04008,B0*"));
+
+        verifyPosition(decoder, text(
+                "$GNX_LOC,865733022352132,095,0,102134,280914,102134,280914,1,18.765432,N,073.752811,W,032,165.32,12,25,0,A,E,2,000099.9,000099.5,GNX01001,12*"));
+
+        verifyNull(decoder, text(
+                "$GNX_LOC,865733022354161,139,0,142838,160316,142825,160316,0,000000000,N,0000000000,E,000,0.00,00,48,0,e,C,2,000000.0,000000.0,GNX04008,BB*"));
+
+        verifyPosition(decoder, text(
+                "$GNX_DIO,863071015071563,110,1,155627,121214,151244,121214,1,08.878321,N,076.643154,E,0,0,0,0,0,0,GNX01001,B1*"));
+
+        verifyNull(decoder, text(
+                "$GNX_DIO,865733022354161,112,1,142849,160316,142714,160316,0,000000000,N,0000000000,E,0,0,0,0,0,0,0,GNX04008,1A*"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/GoSafeProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/GoSafeProtocolDecoderTest.java
new file mode 100644
index 000000000..70c86bb23
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/GoSafeProtocolDecoderTest.java
@@ -0,0 +1,87 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class GoSafeProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        GoSafeProtocolDecoder decoder = new GoSafeProtocolDecoder(null);
+
+        verifyPositions(decoder, text(
+                "*GS06,860078024226974,101437211218,,SYS:G3SC;V3.36;V1.1.8,GPS:A;7;N3.052302;E101.787216;16;137;48;1.58,COT:4261733103,ADC:22.86;0.58;0.01,DTT:4004;E1;0;0;0;3$101439211218,,SYS:G3SC;V3.36;V1.1.8,GPS:A;8;N3.052265;E101.787200;12;152;46;1.31,COT:4261733103,ADC:22.98;0.58;0.01,DTT:4004;E1;0;0;0;3$101441211218,,SYS:G3SC;V3.36;V1.1.8,GPS:A;8;N3.052247;E101.787232;8;131;46;1.34,COT:4261733103,ADC:23.13;0.58;0.01,DTT:4004;E1;0;0;0;3$101510211218,,SYS:G3SC;V3.36;V1.1.8,GPS:A;8;N3.052150;E101.787152;0;131;40;0.97,COT:4261733160,ADC:22.88;0.58;0.01,DTT:4000;E1;0;0;0;1$101540211218,,SYS:G3SC;V3.36;V1.1.8,GPS:A;7;N3.052150;E101.787152;0;131;40;0.97,COT:4261733160,ADC:22.91;0.58;0.00,DTT:4000;E1;0;0;0;1#"));
+
+        verifyPositions(decoder, text(
+                "*GS06,359568052570135,090349191018,,SYS:G3C;V1.40;V1.0.4,GPS:A;10;S26.112722;E28.078766;0;23;1581;0.80,COT:,ADC:10.86;3.79,DTT:4000;E7;0;0;0;1$090419191018,,SYS:G3C;V1.40;V1.0.4,GPS:A;10;S26.112722;E28.078766;0;23;1581;0.80,COT:,ADC:10.85;3.79,DTT:4000;E7;0;0;0;1#"));
+
+        verifyPositions(decoder, text(
+                "*GS06,359913060650380,152248050718,,SYS:G3C;V1.38;V05,GPS:A;10;N31.914370;E35.914640;0;0,COT:689,ADC:0.18;3.55,DTT:4025;E6;0;0;0;1#"));
+
+        verifyPositions(decoder, text(
+                "*GS06,359913060650380,101019050718,,SYS:G3C;V1.38;V05,GPS:L;6;N31.916576;E35.908480;0;0,GSM:1;4;416;3;627A;A84B;-66,COT:188,ADC:4.31;3.88,DTT:4005;E6;0;0;0;1#"));
+
+        verifyPositions(decoder, text(
+                "*GS06,860078024287174,070120310318,,SYS:G3SC;V3.32;V1.1.8,GPS:A;9;N23.169946;E113.450568;0;0;23;0.86,COT:65;20,ADC:4.27;3.73;0.01;0.02,DTT:4004;E0;0;0;0;1,IWD:0;0;000000000000#"));
+
+        verifyPositions(decoder, text(
+                "*GS06,860078024213915,032544190318,,SYS:G3SC;V3.32;V1.1.8,GPS:A;7;N3.052417;E101.787112;0;0;94;1.38,COT:686;0-0-0,ADC:16.25;4.09,DTT:4000;E0;0;0;0;1#"));
+
+        verifyPositions(decoder, text(
+                "*GS06,351535058659335,062728190318,,SYS:G6S;V3.32;V1.0.5,GPS:A;10;N23.169806;E113.450760;0;0;81;0.77,COT:0,ADC:0.00;0.16,DTT:80;E0;0;0;0;1#"));
+
+        verifyPositions(decoder, text(
+                "*GS26,356449061046586,082522030117,,SYS:G737IC;V1.13;V1.0.5,GPS:V;5;N42.594136;W70.723832;0;0;8;2.06,GSM:;;310;260;C76D;9F1D;-85,ADC:3.86,DTT:3918C;;0;0;0;1,#"));
+
+        verifyPositions(decoder, text(
+                "*GS56,357330051092344,123918301116,10,GPS:L;9;N47.582920;W122.238720;0;0;102;0.99,GSM:0;0;310;410;A7DB;385C;-86,COT:76506,ADC:0.82;3.77,DTT:2184;;0;0;10000;0$000000000000,86,GPS:A;6;N47.582912;W122.238840;0;0;88;2.20,COT:76506,ADC:0.00;3.75,DTT:0;;0;0;40;0$000000000000,86,GPS:A;6;N47.582912;W122.238840;0;0;88;2.20,COT:76506,ADC:0.00;3.74,DTT:0;;0;0;40;0$000000000000,93,GPS:A;6;N47.582912;W122.238840;0;0;88;2.20,COT:76506,ADC:0.00;3.73,DTT:8000;;0;0;80000;0$000000000000,13,GPS:L;6;N47.582912;W122.238840;0;0;88;2.20,COT:76506,ADC:11.09;3.79,DTT:2004;;0;0;80000;0$000000000000,90,GPS:L;6;N47.582912;W122.238840;0;0;88;2.20,COT:76506,ADC:11.13;3.79,DTT:23004;;0;0;10000;0$000000000000,,GPS:L;6;N47.582912;W122.238840;0;0;88;2.20,GSM:5;2;310;410;A7DB;385C;-89,COT:76506,ADC:14.12;3.81,DTT:23184;;0;0;0;6#"));
+
+        verifyPositions(decoder, text(
+                "*GS26,356449061139936,022918011216,,SYS:G737IC;V1.13;V1.0.5,GPS:A;9;N42.651728;W70.623520;0;0;48;1.50,ADC:4.08,DTT:3900C;;0;0;0;1,#"));
+
+        verifyNotNull(decoder, text(
+                "*GS56,356449063230915,052339180916,,SYS:G7S;V1.08;V1.2,GPS:V;4;N24.730006;E46.637816;14;0;630,GSM:;;420;4;5655;507A;-70,COT:75242;2-8-17,ADC:13.22;0.08,DTT:23004;;0;0;0;1#"));
+
+        verifyNotNull(decoder, text(
+                "*GS56,356449063230915,052349180916,,SYS:G7S;V1.08;V1.2,GPS:V;6;N24.730384;E46.637620;47;56;607,GSM:;;420;4;5655;507A;-70,COT:75290;2-8-27,ADC:13.24;0.08,DTT:23004;;0;0;0;1#"));
+
+        verifyNotNull(decoder, text(
+                "*GS56,356449063230915,052444180916,,SYS:G7S;V1.08;V1.2,GPS:V;6;N24.730384;E46.637620;47;56;607,GSM:;;420;4;5655;F319;-102,COT:75290;2-9-27,ADC:13.00;0.08,DTT:23004;;0;0;0;1$052449180916,,SYS:G7S;V1.08;V1.2,GPS:V;6;N24.730384;E46.637620;47;56;607,GSM:;;420;4;5655;F319;-102,COT:75290;2-9-27,ADC:13.13;0.08,DTT:23004;;0;0;0;1#"));
+
+        verifyPositions(decoder, text(
+                "*GS16,356449062643845,141224290316,,SYS:G79;V1.13;V1.0.2,GPS:V;5;N24.694972;E46.680736;46;334;606;1.43,GSM:;;420;4;5655;4EB8;-57,COT:330034,ADC:13.31;3.83,DTT:27004;;0;0;0;1,OBD:064101000400000341057E04410304000341510104411001C203410F4B0341112904411F01AB0641010004000014490201FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF03410D21,FUL:28260"));
+
+        verifyPositions(decoder, text(
+                "*GS16,351535059439208,145425130316,,GPS:V;0;N0.000000;E0.000000;0;0;0;0.00;0.00,GSM:1;3;416;3;A8C;2820;-81;416;3;A8C;281F;-83;416;3;A8C;368A;-87;416;3;A8C;368B;-89;416;3;A8C;2C26;-103;416;3;A8C;3689;-107;416;3;A8C;2D83;-107"));
+
+        verifyPosition(decoder, text(
+                "*GS02,358696043774648,GPS:230040;A;S1.166829;E36.934287;0;0;170116,STT:20;0,MGR:32755204,ADC:0;11.2;1;28.3;2;4.1,GFS:0;0"));
+
+        verifyNull(decoder, text(
+                "*GS02,358696043774648"));
+
+        verifyPositions(decoder, text(
+                "*GS16,351535058709775,100356130215,,SYS:G79W;V1.06;V1.0.2,GPS:A;6;N24.802700;E46.616828;0;0;684;1.35,COT:60,ADC:4.31;0.10,DTT:20000;;0;0;0;1"));
+
+        verifyPositions(decoder, text(
+                "*GS16,351535059439208,074558291015,,GPS:A;9;N31.935942;E35.867092;;345;921;1.03;1.59,GSM:1;3;416;3;A8C;368B;-78;416;3;A8C;2820;-73;416;3;BB8;2CBE;-76;416;3;A8C;368A;-76;416;3;A8C;2C26;-79,OBD:04410C122003410D0F03411C0103410547037F011203411100"));
+
+        verifyPositions(decoder, text(
+                "*GS16,351535059439208,083515281015,,GPS:A;9;N31.959502;E35.908316;;108;890;1.05;1.79,GSM:1;4;416;3;AF0;A3A6;-59;416;3;AF0;A3A3;-50;416;3;AF0;A3A4;-56;416;3;AF0;A3A5;-62;416;3;AF0;B195;-76,OBD:04410C194603410D2303411C0103410583037F011203411115"));
+
+        verifyNull(decoder, text(
+                "*GS16,351535058709775"));
+        
+        verifyPositions(decoder, text(
+                "*GS16,351535059439208,103441131015,,GPS:A;8;N31.960122;E35.921652;27;99;847;1.33;2.41,GSM:1;4;416;3;AF0;9C73;-61;416;3;AF0;9C89;-68,OBD:04410C0DA403410D0B03411C010341057A037F011203411100$103453131015,,GPS:A;8;N31.959976;E35.922144;6;0;835;1.33;2.41,GSM:1;4;416;3;AF0;9C73;-67;416;3;AF0;9C89;-64;416;3;AF0;B389;-83,OBD:04410C0D8E03410D0B03411C010341057D037F011203411100$103503131015,,GPS:A;9;N31.959870;E35.922284;11;127;830;1.33;2.41,GSM:1;4;416;3;AF0;9C73;-67;416;3;AF0;9C89;-64;416;3;AF0;B389;-83,OBD:04410C0D8E03410D0B03411C010341057D037F011203411100$103513131015,,GPS:A;9;N31.959742;E35.922516;10;106;830;1.37;2.91,GSM:1;4;416;3;AF0;9C73;-67;416;3;AF0;9C89;-64;416;3;AF0;B389;-83,OBD:04410C0D1003410D0603411C010341057E037F011203411100$103553131015,,GPS:A;8;N31.959564;E35.923308;6;0;836;1.41;2.43,GSM:1;4;416;3;AF0;9C73;-65;416;3;AF0;B389;-71;416;3;AF0;9C89;-74,OBD:04410C0DAE03410D0403411C010341057C037F011203411100#"));
+
+        verifyPositions(decoder, text(
+                "*GS16,351535059439208,155750220815,,SYS:G79;V1.10;V1.0.2,GPS:A;4;N31.944198;E35.846644;0;0;923;9.47;1.00,COT:155133,ADC:12.21;0.10,DTT:20002;;0;0;0;1#"));
+        
+        verifyPositions(decoder, text(
+                "*GS16,351535059439208,070034220815,,SYS:G79;V1.10;V1.0.2,GPS:A;8;N31.945970;E35.859848;29;65;922;1.14;1.68,COT:147528,ADC:14.07;0.11,DTT:27006;;0;0;0;3,OBD:04410C1ECD03410D2D03411C010341057A037F011203411107$070035220815,,SYS:G79;V1.10;V1.0.2,GPS:A;8;N31.945934;E35.859908;29;86;922;1.14;1.68,COT:147528,ADC:13.94;0.15,DTT:27006;;0;0;0;3,OBD:04410C1ECD03410D2D03411C010341057A037F011203411107$070037220815,,SYS:G79;V1.10;V1.0.2,GPS:A;8;N31.945844;E35.859952;29;123;922;1.14;1.68,COT:147625,ADC:13.75;0.11,DTT:27006;;0;0;0;3,OBD:04410C0FE803410D1803411C010341057C037F011203411100$070038220815,,SYS:G79;V1.10;V1.0.2,GPS:A;8;N31.945808;E35.859940;29;145;923;1.14;1.68,COT:147625,ADC:14.00;0.11,DTT:27006;;0;0;0;3,OBD:04410C0FE803410D1803411C010341057C037F011203411100#"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/GotopProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/GotopProtocolDecoderTest.java
new file mode 100644
index 000000000..ca3ddfda8
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/GotopProtocolDecoderTest.java
@@ -0,0 +1,37 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class GotopProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        GotopProtocolDecoder decoder = new GotopProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                ""));
+        
+        verifyNull(decoder, text(
+                "353327020412763,CMD-X"));
+
+        verifyPosition(decoder, text(
+                "013226009991924,CMD-T,A,DATE:130802,TIME:153721,LAT:25.9757433S,LOT:028.1087816E,Speed:000.0,X-X-X-X-81-26,000,65501-00A0-4B8E"));
+
+        verifyPosition(decoder, text(
+                "353327020115804,CMD-T,A,DATE:090329,TIME:223252,LAT:22.7634066N,LOT:114.3964783E,Speed:000.0,84-20,000"),
+                position("2009-03-29 22:32:52.000", true, 22.76341, 114.39648));
+
+        verifyPosition(decoder, text(
+                "353327020115804,CMD-T,A,DATE:090329,TIME:223252,LAT:22.7634066N,LOT:114.3964783E,Speed:000.0,1-1-0-84-20,000"));
+        
+        verifyPosition(decoder, text(
+                "353327020412763,CMD-F,V,DATE:140125,TIME:183636,LAT:51.6384466N,LOT:000.2863866E,Speed:000.0,61-19,"));
+
+        verifyPosition(decoder, text(
+                "013949008891817,CMD-F,A,DATE:150225,TIME:175441,LAT:50.000000N,LOT:008.000000E,Speed:085.9,0-0-0-0-52-31,000,26201-1073-1DF5"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Gps056FrameDecoderTest.java b/src/test/java/org/traccar/protocol/Gps056FrameDecoderTest.java
new file mode 100644
index 000000000..ce21f733f
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Gps056FrameDecoderTest.java
@@ -0,0 +1,25 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assert.assertEquals;
+
+public class Gps056FrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Gps056FrameDecoder decoder = new Gps056FrameDecoder();
+
+        assertEquals(
+                binary("242435314750534c5f30323836323436323033333738323934361905110f160b0b7710584e1cbd1b9b4500005b100300fb0a071700ffff23"),
+                decoder.decode(null, null, binary("242435314750534c5f30323836323436323033333738323934361905110f160b0b7710584e1cbd1b9b4500005b100300fb0a071700ffff230030")));
+
+        assertEquals(
+                binary("242432354c4f474e5f3131383632343632303333373832393436322e3123"),
+                decoder.decode(null, null, binary("242432354c4f474e5f3131383632343632303333373832393436322e3123")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Gps056ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Gps056ProtocolDecoderTest.java
new file mode 100644
index 000000000..a6d0c024a
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Gps056ProtocolDecoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Gps056ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Gps056ProtocolDecoder decoder = new Gps056ProtocolDecoder(null);
+
+        verifyNull(decoder, buffer(
+                "$$25LOGN_118624620337829462.1#"));
+
+        verifyPosition(decoder, binary(
+                "242435314750534C5F30323836333037313031353034353834391D0A0E091A0A0B1112C34E1E23230A45FF00000000000000000000000023"));
+
+        verifyAttributes(decoder, binary(
+                "2424323853594E435F313138363330373130313530343538343900000000000023"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Gps103ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Gps103ProtocolDecoderTest.java
new file mode 100644
index 000000000..da8d8ff5a
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Gps103ProtocolDecoderTest.java
@@ -0,0 +1,261 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Position;
+
+public class Gps103ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Gps103ProtocolDecoder decoder = new Gps103ProtocolDecoder(null);
+
+        verifyAttribute(decoder, text(
+                "imei:868683023212255,tracker,190205084503,,F,064459.000,A,4915.1221,N,01634.5655,E,3.91,83.95;"),
+                "course", 83.95);
+
+        verifyPosition(decoder, text(
+                "imei:864180034124375,vt14,190116192753,,F,172750.000,A,3649.2186,N,00235.8411,W,0.00,0,,0,0,51.93%,,+22;"));
+
+        verifyNull(decoder, text(
+                "imei:864180034124375,vr,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;"));
+
+        verifyPosition(decoder, text(
+                "imei:868683026321020,T:+11,181217080050,,F,080047.000,A,3227.3057,N,11649.4754,W,0.00,0,,0,0,0.00%,,+11;"));
+
+        verifyAttribute(decoder, text(
+                "imei:868683026321020,tracker,181217080106,,F,080102.000,A,3227.3057,N,11649.4754,W,0.00,0,,0,0,0.00%,0,+11;"),
+                Position.PREFIX_TEMP + 1, 11);
+
+        verifyPosition(decoder, text(
+                "imei:861359038609986,Equipo 1,---,------,----,214734,241018,26,1,-33.42317,-70.61930,067,229,0674,1.00,08,0,1,---,*"));
+
+        verifyPosition(decoder, text(
+                "imei:861359038609986,Equipo 1,---,------,----,214812,241018,14,0,-33.42317,-70.61930,000,000,0000,99.9,00,0,1,---,*"));
+
+        verifyNull(decoder, text(
+                "imei:123451234512345,L,*"));
+
+        verifyAttributes(decoder, text(
+                "imei:868683027758113,OBD,180905200218,,,,0,0,0.39%,70,9.41%,494,0.00,P0137,P0430,,;"));
+
+        verifyAttribute(decoder, text(
+                "imei:353451044508750,001,0809231929,13554900601,F,055403.000,A,2233.1870,N,11354.3067,E,0.00,30.1,65.43,1,0,10.5%,0.0%,28;"),
+                "fuel1", 10.5);
+
+        verifyPosition(decoder, text(
+                "imei:864180036029895,acc on,180508145653,,F,065645.000,A,4729.1497,N,01904.2342,E,0.00,0,,1,,0.00%,,;"));
+
+        verifyNotNull(decoder, text(
+                "imei:864895030279986,ac alarm,180404174252,,L,,,296a,,51f7,,,"));
+
+        verifyAttributes(decoder, text(
+                "imei:359710048977327,OBD,180301094003,5000000,0.00,0.00,98,18,68.63%,55,25.10%,1368,14.24,,,,;"));
+
+        verifyAttributes(decoder, text(
+                "imei:862106025092216,OBD,170605095949,195874,,370.8,808,066,30.0%,+87,13.0%,02444,14.3,,,,;"));
+
+        verifyAttributes(decoder, text(
+                "imei:868683027825532,OBD,170613203014,,,,0,0,0.00%,0,0.00%,0,0.00,,,,;"));
+
+        verifyAttributes(decoder, text(
+                "imei:862106025092216,OBD,170612165656,196043,,145803.9,,000,0.0%,+,0.0%,00000,12.6,,,,;"));
+
+        verifyAttributes(decoder, text(
+                "imei:862106025092216,OBD,170605095949,195874,,370.8,808,066,30.0%,+87,13.0%,02444,14.3,,,,;"));
+
+        verifyPosition(decoder, text(
+                "imei:353451044508750,DTC,0809231929,,F,055403.000,A,2233.1870,N,11354.3067,E,0.00,30.1,,1,0,10.5%,P0021,;"));
+
+        verifyPosition(decoder, text(
+                "imei:353451044508750,oil1,0809231929,,F,055403.000,A,2233.1870,N,11354.3067,E,0.00,,,,51.6,41.7,;"));
+
+        verifyPosition(decoder, text(
+                "imei:353451044508750,oil2,0809231929,,F,055403.000,A,2233.1870,N,11354.3067,E,0.00,,,,51.6,41.7,;"));
+
+        verifyPosition(decoder, text(
+                "imei:353451044508750,oil 51.67,0809231929,,F,055403.000,A,2233.1870,N,11354.3067,E,0.00,,;"));
+
+        verifyPosition(decoder, text(
+                "imei:353451044508750,T:+28.0,0809231929,,F,055403.000,A,2233.1870,N,11354.3067,E,0.00,,;"));
+
+        verifyPosition(decoder, text(
+                "imei:353451044508750,bonnet alarm,0809231929,,F,055403.000,A,2233.1870,N,11354.3067,E,0.00,,;"));
+
+        verifyPosition(decoder, text(
+                "imei:353451044508750,footbrake alarm,0809231929,,F,055403.000,A,2233.1870,N,11354.3067,E,0.00,,;"));
+
+        verifyPosition(decoder, text(
+                "imei:862106021237716,ac alarm,1611291645,,F,204457.000,A,1010.2783,N,06441.0274,W,0.00,,;"));
+
+        verifyAttributes(decoder, text(
+                "imei:359710049057798,OBD,161003192752,1785,,,0,54,96.47%,75,20.00%,1892,0.00,P0134,P0571,,;"));
+
+        verifyAttributes(decoder, text(
+                "imei:359710049090138,OBD,160629022949,51442,0.00,15.88,5632,122,40.39%,95,0.00%,2101,13.80,,,,;"));
+
+        verifyPosition(decoder, text(
+                "imei:359710049090138,tracker,160629022948,,F,182949.000,A,4043.8839,N,11328.8029,W,65.26,271.82,,1,0,31.37%,51442,;"));
+
+        verifyAttributes(decoder, text(
+                "imei:359710049042014,001,160615040011,,F,040011.000,A,2833.0957,N,07711.9465,E,0.01,215.33,,0,,,,;"));
+
+        verifyAttributes(decoder, text(
+                "imei:359710049028435,OBD,160316053657,70430,,,0,49,60.00%,46,19.22%,859,0.00,U1108,,,;"));
+
+        verifyPosition(decoder, text(
+                "359769031878322imei:359769031878322,tracker,1602160718,2,F,221811.000,A,1655.2193,S,14546.6722,E,0.00,,"));
+
+        verifyNull(decoder, text(
+                "imei:865328021049167,OBD,141118115036,,,0.0,,000,0.0%,+,0.0%,00000,,,,,"));
+
+        verifyAttributes(decoder, text(
+                "imei:359710049032874,OBD,160208152900,13555,,,45,0,24.71%,35,13.73%,1230,14.13,U1108,,,"));
+
+        verifyAttributes(decoder, text(
+                "imei:359710049064398,OBD,160101035156,17887,0.00,17.06,0,0,0.00%,0,0.00%,16383,10.82,,,,"));
+
+        verifyPosition(decoder, text(
+                "imei:868683020235846,rfid,160202091347,49121185,F,011344.000,A,0447.7273,N,07538.9934,W,0.00,0,,0,0,0.00%,,"));
+
+        verifyNotNull(decoder, text(
+                "imei:359710049075097,help me,,,L,,,113b,,558f,,,,,0,0,,,"));
+
+        verifyNotNull(decoder, text(
+                "imei:359710041100000,tracker,000000000,,L,,,fa8,,c9af,,,,,0,0,0.00%,,"));
+
+        verifyNotNull(decoder, text(
+                "imei:863070016871385,tracker,0000000119,,L,,,0FB6,,CB5D,,,"));
+
+        verifyPosition(decoder, text(
+                "imei:359710045559474,tracker,151030080103,,F,000101.000,A,5443.3834,N,02512.9071,E,0.00,0;"),
+                position("2015-10-30 00:01:01.000", true, 54.72306, 25.21512));
+
+        verifyPosition(decoder, text(
+                "imei:359710049092324,tracker,151027025958,,F,235957.000,A,2429.5156,N,04424.5828,E,0.01,27.91,,0,0,,,;"),
+                position("2015-10-26 23:59:57.000", true, 24.49193, 44.40971));
+
+        verifyPosition(decoder, text(
+                "imei:865328021058861,tracker,151027041419,,F,011531.000,A,6020.2979,N,02506.1940,E,0.49,113.30,,0,0,0.0%,,;"),
+                position("2015-10-27 01:15:31.000", true, 60.33830, 25.10323));
+
+        // Log on request
+        verifyNull(decoder, text(
+                "##,imei:359586015829802,A"));
+
+        // Heartbeat package
+        verifyNull(decoder, text(
+                "359586015829802"));
+
+        // No GPS signal
+        verifyNull(decoder, text(
+                "imei:359586015829802,tracker,000000000,13554900601,L,;"));
+
+        verifyPosition(decoder, text(
+                "imei:869039001186913,tracker,1308282156,0,F,215630.000,A,5602.11015,N,9246.30767,E,1.4,,175.9,"));
+
+        verifyPosition(decoder, text(
+                "imei:359710040656622,tracker,13/02/27 23:40,,F,125952.000,A,3450.9430,S,13828.6753,E,0.00,0"));
+        
+        verifyPosition(decoder, text(
+                "imei:359710040565419,tracker,13/05/25 14:23,,F,062209.000,A,0626.0411,N,10149.3904,E,0.00,0"));
+
+        verifyPosition(decoder, text(
+                "imei:353451047570260,tracker,1302110948,,F,144807.000,A,0805.6615,S,07859.9763,W,0.00,,"));
+        
+        verifyPosition(decoder, text(
+                "imei:359587016817564,tracker,1301251602,,F,080251.000,A,3223.5832,N,11058.9449,W,0.03,"));
+        
+        verifyPosition(decoder, text(
+                "imei:359587016817564,tracker,1301251602,,F,080251.000,A,3223.5832,N,11058.9449,W,,"));
+
+        verifyPosition(decoder, text(
+                "imei:012497000208821,tracker,1301080525,,F,212511.000,A,2228.5279,S,06855.6328,W,18.62,268.98,"));
+
+        verifyPosition(decoder, text(
+                "imei:012497000208821,tracker,1301072224,,F,142411.077,A,2227.0739,S,06855.2912,,0,0,"));
+
+        verifyPosition(decoder, text(
+                "imei:012497000431811,tracker,1210260609,,F,220925.000,A,0845.5500,N,07024.7673,W,0.00,,"));
+
+        verifyPosition(decoder, text(
+                "imei:100000000000000,help me,1004171910,,F,010203.000,A,0102.0003,N,00102.0003,E,1.02,"));
+
+        verifyPosition(decoder, text(
+                "imei:353451040164707,tracker,1105182344,+36304665439,F,214418.000,A,4804.2222,N,01916.7593,E,0.37,"));
+
+        verifyPosition(decoder, text(
+                "imei:353451042861763,tracker,1106132241,,F,144114.000,A,2301.9052,S,04909.3676,W,0.13,"));
+
+        verifyPosition(decoder, text(
+                "imei:359587010124900,tracker,0809231929,13554900601,F,112909.397,A,2234.4669,N,11354.3287,E,0.11,321.53,"));
+
+        verifyPosition(decoder, text(
+                "imei:353451049926460,tracker,1208042043,123456 99008026,F,124336.000,A,3509.8668,N,03322.7636,E,0.00,,"));
+
+        // SOS alarm
+        verifyPosition(decoder, text(
+                "imei:359586015829802,help me,0809231429,13554900601,F,062947.294,A,2234.4026,N,11354.3277,E,0.00,"));
+
+        // Low battery alarm
+        verifyPosition(decoder, text(
+                "imei:359586015829802,low battery,0809231429,13554900601,F,062947.294,A,2234.4026,N,11354.3277,E,0.00,"));
+
+        // Geo-fence alarm
+        verifyPosition(decoder, text(
+                "imei:359586015829802,stockade,0809231429,13554900601,F,062947.294,A,2234.4026,N,11354.3277,E,0.00,"));
+
+        // Move alarm
+        verifyPosition(decoder, text(
+                "imei:359586015829802,move,0809231429,13554900601,F,062947.294,A,2234.4026,N,11354.3277,E,0.00,"));
+
+        // Over speed alarm
+        verifyPosition(decoder, text(
+                "imei:359586015829802,speed,0809231429,13554900601,F,062947.294,A,2234.4026,N,11354.3277,E,0.00,"));
+
+        verifyPosition(decoder, text(
+                "imei:863070010423167,tracker,1211051840,,F,104000.000,A,2220.6483,N,11407.6377,,0,0,"));
+
+        verifyPosition(decoder, text(
+                "imei:863070010423167,tracker,1211051951,63360926,F,115123.000,A,2220.6322,N,11407.5313,E,0.00,,"));
+
+        verifyPosition(decoder, text(
+                "imei:863070010423167,tracker,1211060621,,F,062152.000,A,2220.6914,N,11407.5506,E,15.85,347.84,"));
+        
+        verifyPosition(decoder, text(
+                "imei:863070012698733,tracker,1303092334,,F,193427.000,A,5139.0369,N,03907.2791,E,0.00,,"));
+        
+        verifyPosition(decoder, text(
+                "imei:869039001186913,tracker,130925065533,0,F,065533.000,A,5604.11015,N,9232.12238,E,0.0,,329.0,"));
+        
+        verifyPosition(decoder, text(
+                "imei:359710041641581,acc alarm,1402231159,,F,065907.000,A,2456.2591,N,06708.8335,E,7.53,76.10,,1,0,0.03%,,"));
+        
+        verifyPosition(decoder, text(
+                "imei:359710041641581,acc alarm,1402231159,,F,065907.000,A,2456.2591,N,06708.8335,E,7.53,76.10,,1,0,0.03%,,"));
+        
+        verifyPosition(decoder, text(
+                "imei:313009071131684,tracker,1403211928,,F,112817.000,A,0610.1133,N,00116.5840,E,0.00,,,0,0,0.0,0.0,"));
+        
+        verifyPosition(decoder, text(
+                "imei:866989771979791,tracker,140527055653,,F,215653.00,A,5050.33113,N,00336.98783,E,0.066,0"));
+        
+        verifyPosition(decoder, text(
+                "imei:353552045375005,tracker,150401165832,61.0,F,31.0,A,1050.73696,N,10636.49489,E,8.0,,22.0,"));
+        
+        verifyPosition(decoder, text(
+                "imei:353552045403597,tracker,150420050648,53.0,F,0.0,A,N,5306.64155,E,00700.77848,0.0,,1.0,;"));
+        
+        verifyPosition(decoder, text(
+                "imei:353552045403597,tracker,150420051153,53.0,F,0.0,A,5306.64155,N,00700.77848,E,0.0,,1.0,;"));
+        
+        verifyPosition(decoder, text(
+                "imei:359710047424644,tracker,150506224036,,F,154037.000,A,0335.2785,N,09841.1543,E,3.03,337.54,,0,0,45.16%,,;"));
+        
+        verifyPosition(decoder, text(
+                "imei:865328023776874,acc off,150619152221,,F,072218.000,A,5439.8489,N,02518.5945,E,0.00,,,1,1,0.0,0.0,23.0,;"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Gps103ProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/Gps103ProtocolEncoderTest.java
new file mode 100644
index 000000000..f888ee252
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Gps103ProtocolEncoderTest.java
@@ -0,0 +1,39 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+import static org.junit.Assert.assertEquals;
+
+public class Gps103ProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncodePositionPeriodic() throws Exception {
+
+        Gps103ProtocolEncoder encoder = new Gps103ProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_POSITION_PERIODIC);
+        command.set(Command.KEY_FREQUENCY, 300);
+        
+        assertEquals("**,imei:123456789012345,C,05m", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodeCustom() throws Exception {
+
+        Gps103ProtocolEncoder encoder = new Gps103ProtocolEncoder();
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_CUSTOM);
+        command.set(Command.KEY_DATA, "H,080");
+
+        assertEquals("**,imei:123456789012345,H,080", encoder.encodeCommand(command));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/GpsGateProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/GpsGateProtocolDecoderTest.java
new file mode 100644
index 000000000..d35666b56
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/GpsGateProtocolDecoderTest.java
@@ -0,0 +1,52 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class GpsGateProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        GpsGateProtocolDecoder decoder = new GpsGateProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$FRCMD,0097,_SendMessage,,7618.51990,S,4002.26182,E,350.0,1.08,0.0,250816,183522.000,0*7F"));
+
+        verifyPosition(decoder, text(
+                "$FRCMD,356406061385182,_SendMessage,,5223.88542,N,11440.45866,W,951.2,0.027,,220716,153507.00,1*5F"));
+
+        verifyPosition(decoder, text(
+                "$FRCMD,353067011068246,_SendMessage,,1918.1942,N,09906.3696,W,2246.5,000.0,295.9,150416,213147.00,1,Odometer=*70"));
+
+        verifyNull(decoder, text(
+                "$FRCMD,862950025974620,_Ping,voltage=4*4F"));
+
+        verifyPosition(decoder, text(
+                "$FRCMD,862950025974620,_SendMessage, ,2721.5781,S,15259.145,E,61,0.00,61,080316,092612,1,SosButton=0,voltage=4*60"));
+
+        verifyNull(decoder, text(
+                "$FRLIN,,user1,8IVHF*7A"));
+        
+        verifyNull(decoder, text(
+                "$FRLIN,,354503026292842,VGZTHKT*0C"));
+
+        verifyNull(decoder, text(
+                "$FRLIN,IMEI,1234123412341234,*7B"));
+        
+        verifyNull(decoder, text(
+                "$FRLIN,,saab93_device,KLRFBGIVDJ*28"));
+
+        verifyPosition(decoder, text(
+                "$GPRMC,154403.000,A,6311.64120,N,01438.02740,E,0.000,0.0,270707,,*0A"),
+                position("2007-07-27 15:44:03.000", true, 63.19402, 14.63379));
+
+        verifyPosition(decoder, text(
+                "$GPRMC,074524,A,5553.73701,N,03728.90491,E,10.39,226.5,160614,0.0,E*75"));
+
+        verifyPosition(decoder, text(
+                "$GPRMC,154403.000,A,6311.64120,N,01438.02740,E,0.000,0.0,270707,,*0A"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/GpsMarkerProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/GpsMarkerProtocolDecoderTest.java
new file mode 100644
index 000000000..d6ba11cb7
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/GpsMarkerProtocolDecoderTest.java
@@ -0,0 +1,32 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+
+public class GpsMarkerProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        GpsMarkerProtocolDecoder decoder = new GpsMarkerProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$GM23D863071014445404T260816142611N55441051E037325071033063C0530304#"));
+
+        verifyNull(decoder, text(
+                "$GM300350123456789012T100511123300G25000001772F185200000000000000005230298#"));
+
+        verifyPosition(decoder, text(
+                "$GM200350123456789012T100511123300N55516789E03756123400000035230298#"),
+                position("2011-05-10 12:33:00.000", true, 55.86132, 37.93539));
+
+        verifyPosition(decoder, text(
+                "$GM1350123456789012T1005111233N55516789E03756123400000035200298#"));
+
+        verifyPosition(decoder, text(
+                "$GM203863071014445404T150715202258N55481576E03729275300000040530301#"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/GpsmtaProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/GpsmtaProtocolDecoderTest.java
new file mode 100644
index 000000000..438d0fb3a
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/GpsmtaProtocolDecoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class GpsmtaProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        GpsmtaProtocolDecoder decoder = new GpsmtaProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "3085a94ef459 1446536867 49.81621 24.054207 1 0 22 0 10 12 24 0 0"));
+
+        verifyPosition(decoder, text(
+                "864528021249771 1446116686 49.85073 24.004438 0 217 6 338 00 59 27 0 0"));
+
+        verifyNotNull(decoder, text(
+                "359144048138856 1442932957 -49.85064 -24.003979 1 0 40 0 10 110 26 0 0"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/GranitFrameDecoderTest.java b/src/test/java/org/traccar/protocol/GranitFrameDecoderTest.java
new file mode 100644
index 000000000..7c4bb06c2
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/GranitFrameDecoderTest.java
@@ -0,0 +1,45 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assert.assertEquals;
+
+public class GranitFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        GranitFrameDecoder decoder = new GranitFrameDecoder();
+
+        assertEquals(
+                binary("2b525243427e1a003e2934757c57b8b03c38d279b4e61e9bd7006b000000001c00002a4533"),
+                decoder.decode(null, null, binary("2b525243427e1a003e2934757c57b8b03c38d279b4e61e9bd7006b000000001c00002a45330d0a")));
+
+        assertEquals(
+                binary("2b525243427e1a000d0a34757c57b8b03c38d279b4e61e9bd7006b000000001c00002a4533"),
+                decoder.decode(null, null, binary("2b525243427e1a000d0a34757c57b8b03c38d279b4e61e9bd7006b000000001c00002a45330d0a")));
+
+        assertEquals(
+                binary("4f4b"),
+                decoder.decode(null, null, binary("4f4b0d0a2b525243427e1a000d0a34757c57b8b03c38d279b4e61e9bd7006b000000001c00002a45330d0a")));
+
+        assertEquals(
+                binary("2b444441547e84003e290401d01690737c57b8903c383c7fa0e5081b64006b000000001c0000b8803c388e7fe7e5102197006c000000001c0000b8813c38ad7f02e6042035006c000000001d0000b8813c38bf7f13e6001d1e006c000000001d0000b8813c38bf7f13e6001d00006c000000001d0000b8903c38977f34e6091065006c000000001e000014002a3932"),
+                decoder.decode(null, null, binary("2b444441547e84003e290401d01690737c57b8903c383c7fa0e5081b64006b000000001c0000b8803c388e7fe7e5102197006c000000001c0000b8813c38ad7f02e6042035006c000000001d0000b8813c38bf7f13e6001d1e006c000000001d0000b8813c38bf7f13e6001d00006c000000001d0000b8903c38977f34e6091065006c000000001e000014002a39320d0a")));
+
+        assertEquals(
+                binary("2b444441547e84003e290401d41680747c57f8a03c38987f50e6005300006c000000001c0000f8b03c38987f50e6005300006c000000001c0000fefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefe14002a4346"),
+                decoder.decode(null, null, binary("2b444441547e84003e290401d41680747c57f8a03c38987f50e6005300006c000000001c0000f8b03c38987f50e6005300006c000000001c0000fefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefe14002a43460d0a")));
+
+        assertEquals(
+                binary("2b49444e543a204e6176696761746f722e30347820204669726d776172652076657273696f6e202030373132474c4e202a3231"),
+                decoder.decode(null, null, binary("2b49444e543a204e6176696761746f722e30347820204669726d776172652076657273696f6e202030373132474c4e202a32310d0a")));
+
+        assertEquals(
+                binary("4552524f522057524f4e4720434845434b53554d5f31"),
+                decoder.decode(null, null, binary("4552524f522057524f4e4720434845434b53554d5f310d0a")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/GranitProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/GranitProtocolDecoderTest.java
new file mode 100644
index 000000000..fc75b2a53
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/GranitProtocolDecoderTest.java
@@ -0,0 +1,49 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class GranitProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        GranitProtocolDecoder decoder = new GranitProtocolDecoder(null);
+
+        verifyPositions(decoder, binary(
+                "2b444441547e8400c500040130050c43495808002839aee3150200000000640000000000000008002839aee3150200000000640000000000000008002839aee3150200000000640000000000000008002839aee3150200000000640000000000000008002839aee3150200000000640000000000000008002839aee3150200000000640000000000000014002a37420d0a"));
+
+        verifyPosition(decoder, binary(
+                "2b525243427e1a00c5008443495808002839aee315020000000064000000000000002a37410d0a"),
+                position("2016-12-08 11:27:00.000", false, 57.00888, 40.97143));
+
+        verifyPosition(decoder, binary(
+                "2b525243427e1a00c500ec904858b842283997e30002000000005e000000000d00002a32390d0a"),
+                position("2016-12-07 22:45:00.000", true, 57.00853, 40.97105));
+
+        verifyPosition(decoder, binary(
+                "2b525243427e1a00c500009148580800283997e30002000000005f000000000000002a33410d0a"));
+
+        verifyPositions(decoder, binary(
+                "2b444441547e84003b6d0401b10e9217445800b051398f35d34a313b000072000000010b000080b051398f35d34a313b000072000000010b0000f0b051390f33314c303b900371000000010b0000f0b05139cd31e54c2f3cd0016f000000010b0000f0b051396831204d303d950071000000010b0000f0b051397530aa4d323c610171000000010b00000a002a30420d0a"));
+
+        verifyPosition(decoder, binary(
+                "2b525243427e1a003e2934757c57b8b03c38d279b4e61e9bd7006b000000001c00002a4533"));
+
+        verifyPositions(decoder, binary(
+                "2b444441547e84003e290401d01690737c57b8903c383c7fa0e5081b64006b000000001c0000b8803c388e7fe7e5102197006c000000001c0000b8813c38ad7f02e6042035006c000000001d0000b8813c38bf7f13e6001d1e006c000000001d0000b8813c38bf7f13e6001d00006c000000001d0000b8903c38977f34e6091065006c000000001e000014002a3932"));
+
+        verifyPositions(decoder, binary(
+                "2b444441547e84003e290401d41680747c57f8a03c38987f50e6005300006c000000001c0000f8b03c38987f50e6005300006c000000001c0000fefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefe14002a4346"));
+
+        // +IDNT: Navigator.04x  Firmware version  0712GLN *21
+        verifyAttributes(decoder, binary(
+                "2b49444e543a204e6176696761746f722e30347820204669726d776172652076657273696f6e202030373132474c4e202a3231"));
+
+        // ERROR WRONG CHECKSUM_1
+        verifyAttributes(decoder, binary(
+                "4552524f522057524f4e4720434845434b53554d5f31"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Gt02ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Gt02ProtocolDecoderTest.java
new file mode 100644
index 000000000..f9b8f6509
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Gt02ProtocolDecoderTest.java
@@ -0,0 +1,43 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Gt02ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Gt02ProtocolDecoder decoder = new Gt02ProtocolDecoder(null);
+
+        verifyAttributes(decoder, binary(
+                "6868150000035889905895258400831c07415045584f4b210d0a"));
+
+        verifyAttributes(decoder, binary(
+                "68682d0000035889905895258400951c1f415045584572726f723a20506172616d65746572203120284f4e2f4f4646290d0a"));
+
+        verifyAttributes(decoder, binary(
+                "68680f0504035889905831401700df1a00000d0a"));
+
+        verifyAttributes(decoder, binary(
+                "6868130504035889905831401700001a040423261e290d0a"));
+
+        verifyAttributes(decoder, binary(
+                "68681905040358899058314017000e1a010a2623211b2722252329000d0a"));
+
+        verifyAttributes(decoder, binary(
+                "68681a060303588990500037252de91a010a171a191b171915191e10000d0a"));
+
+        verifyPosition(decoder, binary(
+                "68682500000123456789012345000110010101010101026B3F3E026B3F3E000000000000000000010D0A"),
+                position("2001-01-01 01:01:01.000", true, -22.54610, -22.54610));
+
+        verifyAttributes(decoder, binary(
+                "6868110603035889905101276600001a0402292d0d0a"));
+
+        verifyPosition(decoder, binary(
+                "68682500a403588990510127660001100e09060a1d1b00ade1c90b79ea3000011b000000000000050d0a"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Gt06FrameDecoderTest.java b/src/test/java/org/traccar/protocol/Gt06FrameDecoderTest.java
new file mode 100644
index 000000000..cf6d1cfd7
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Gt06FrameDecoderTest.java
@@ -0,0 +1,51 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Gt06FrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Gt06FrameDecoder decoder = new Gt06FrameDecoder();
+
+        verifyFrame(
+                binary("787803691604130318491475905BD30E25001E10BBF7635D14759006E626560501CC0028660F213228660F1F2828660EA81E286610731428660F20140D0A"),
+                decoder.decode(null, null, binary("787803691604130318491475905BD30E25001E10BBF7635D14759006E626560501CC0028660F213228660F1F2828660EA81E286610731428660F20140D0A")));
+
+        verifyFrame(
+                binary("78780d0103563140414198583c0d0a"),
+                decoder.decode(null, null, binary("78780d0103563140414198583c0d0a")));
+
+        verifyFrame(
+                binary("787800691709261259400700cc0400d376714600d37a3d5000d37a3c5000d393505a00d3765d5a00d376735a00d32e6b640d0a"),
+                decoder.decode(null, null, binary("787800691709261259400700cc0400d376714600d37a3d5000d37a3c5000d393505a00d3765d5a00d376735a00d32e6b640d0a")));
+
+        verifyFrame(
+                binary("7878121011091c0b1e2e98058507f80097a6ac03344a0d0a"),
+                decoder.decode(null, null, binary("7878121011091c0b1e2e98058507f80097a6ac03344a0d0a")));
+
+        verifyFrame(
+                binary("787808171709281135331491827b75594dc8d719a9708452cad719a9708550cad719a97086521491827b75574cac9e17b308085dc8d71939633947cad71939633a480700cc0400d37a3d5a00d37a3d5a00d37a3d5a00d37a3d5a00d37a3d5a00d37a3d5a00d37a3d5a0d0a"),
+                decoder.decode(null, null, binary("787808171709281135331491827b75594dc8d719a9708452cad719a9708550cad719a97086521491827b75574cac9e17b308085dc8d71939633947cad71939633a480700cc0400d37a3d5a00d37a3d5a00d37a3d5a00d37a3d5a00d37a3d5a00d37a3d5a00d37a3d5a0d0a")));
+
+        verifyFrame(
+                binary("787808134606020002044dc5050d0a"),
+                decoder.decode(null, null, binary("787808134606020002044dc5050d0a")));
+
+        verifyFrame(
+                binary("78781f1210020e14061dcc0476fcd0003e3faf3e14b20000000000000000044ef6740d0a"),
+                decoder.decode(null, null, binary("78781f1210020e14061dcc0476fcd0003e3faf3e14b20000000000000000044ef6740d0a")));
+
+        verifyFrame(
+                binary("78780d010352887071911998000479d00d0a"),
+                decoder.decode(null, null, binary("78780d010352887071911998000479d00d0a")));
+
+        verifyFrame(
+                binary("78782516000000000000c000000000000000000020000900fa0210ef00fb620006640301000468030d0a"),
+                decoder.decode(null, null, binary("78782516000000000000c000000000000000000020000900fa0210ef00fb620006640301000468030d0a")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Gt06ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Gt06ProtocolDecoderTest.java
new file mode 100644
index 000000000..a6008e682
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Gt06ProtocolDecoderTest.java
@@ -0,0 +1,294 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Position;
+
+public class Gt06ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Gt06ProtocolDecoder decoder = new Gt06ProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "787805120099abec0d0a"));
+
+        verifyNull(decoder, binary(
+                "78780D01086471700328358100093F040D0A"));
+
+        verifyPosition(decoder, binary(
+                "787821121303120b2524c70138e363085b549003d43301940057d200cd52c000006aa1ca0d0a"));
+
+        verifyAttribute(decoder, binary(
+                "7878251613020C12141AC5027951430C2A16F60014000900000000001A00007C550300020002F1E70D0A"),
+                Position.KEY_ALARM, Position.ALARM_REMOVING);
+
+        verifyNotNull(decoder, binary(
+                "7878006919012105090303028f01007549e05a00bc9c5c5a007a8d1a5a0d0a"));
+
+        verifyNotNull(decoder, binary(
+                "7878001719011910543607028f0100bc2e695a00bcb3635a00bc27c56400bc447b6400bc46c96400bc33ce6400bc64ca640d0a"));
+
+        verifyAttributes(decoder, binary(
+                "797900de8c120b1502121b013137333d302c3232333d312c3238333d30303030303030302c3436333d30303030303035362c3437333d30303030303030662c3438333d30303030303031312c3242333d30303030303030302c3244333d30303030313839632c3335333d30303030313661382c3336333d30303032386163382c3339333d30303030303230612c3330333d30303030303561612c3439333d30303030303030302c3441333d4b4e4146323431434d4b353031343235352c3341333d30303030303338352c3530333d30303030c0041df0940f89c06700000000c800910d0a"));
+
+        verifyAttributes(decoder, binary(
+                "79790020940A035985708053908307060104900402788950301217070401538F0003E8210D0A"));
+
+        verifyPosition(decoder, binary(
+                "78783c3439000000120a0902093a07031f9e690529be2e00155500000016214901a30308b70000b3fb004aa82b059401a3422100000001000000007d9370b90d0a"));
+
+        verifyAttributes(decoder, binary(
+                "7878079404eb001c705d0d0a"));
+
+        verifyNotNull(decoder, binary(
+                "78781219028f0a29e10036f12003040102000875dc0d0a"));
+
+        verifyAttributes(decoder, binary(
+                "79790008940000ed0289d6860d0a"));
+
+        verifyNull(decoder, binary(
+                "797900a59404414c4d313d34353b414c4d323d44353b414c4d333d35353b535441313d34303b4459443d30313b534f533d303538353036313536372c2c3b43454e5445523d3b46454e43453d46656e63652c4f46462c302c302e3030303030302c302e3030303030302c3330302c494e206f72204f55542c303b49434349443d38393937313033313031303038393539303432463b4d4f44453d4d4f44452c312c3138303b0008f65e0d0a"));
+
+        verifyPosition(decoder, binary(
+                "78782222120616083817c5050cc8c801a819d600152400e8011dbf003332000000004862500d0a"));
+
+        verifyAttributes(decoder, binary(
+                "78780B23C00122040001000818720D0A"));
+
+        verifyNotNull(decoder, binary(
+                "78782EA4110C0C02281BF6026C18720C38D22800149C1181CC00010000260E000000000615F8012C05041102FF001058FD0D0A"));
+
+        verifyNotNull(decoder, binary(
+                "78787aa2110c0e06372c813601040000591200000000009d7c01040000591200000000009d7c01040000591200000000009d7c01040000591200000000009d7c01040000591200000000009d7c01040000591200000000009d7c01040000591200000000009d7c0104ff02001801eb4039d10000000000000004fabeb50d0a"));
+
+        verifyNotNull(decoder, binary(
+                "78782727110c0b0e170f850450059107f461ae001c7e0a81360104cb8a00bef32806030c02ff000316b10d0a"));
+
+        verifyNotNull(decoder, binary(
+                "78782322110c070f1b0270000000000000000000040081360104cb8a00bef3000000000523030d0a"));
+
+        verifyNotNull(decoder, binary(
+                "787880a2110b161010140136040000591200000000009d7c01020000591200000000009d7c01020000591200000000009d7c01020000591200000000009d7c01020000591200000000009d7c01020000591200000000009d7c01020000591200000000009d7c0102ff033c1e04ddc28aa6001801eb4039c90000000000000014db84730d0a"));
+
+        verifyNotNull(decoder, binary(
+                "78782ba701cc000000919100000000090617032b3836313832323038343735363200000000000000000100049fb60d0a"));
+
+        verifyNotNull(decoder, binary(
+                "787819a501cc0000009191000000000906170304050400010005f44d0d0a"));
+
+        verifyNotNull(decoder, binary(
+                "78782ca3110b10081336f000000000000000000004003901cc0000009191000000000906170304050400010003e0940d0a"));
+
+        verifyNotNull(decoder, binary(
+                "7878A3A2110B0603201501CC010000254E000000000615F804000000254E000000000615F804000000254E000000000615F804000000254E000000000615F804000000254E000000000615F804000000254E000000000615F804000000254E000000000615F80400FF08F483CD4DF4C0D750BD5F8BC5CECFB0D59DAFB459CDA8574E8424C6CC50BD5F6C7E1CC9B0D59D8AA718C90087363040E0C83496727B4DE4C7002919670D0A"));
+
+        verifyNotNull(decoder, binary(
+                "78786CA1110B0413093801CC01000025FC000000000618C10201000025FC000000000618C10201000025FC000000000618C10201000025FC000000000618C10201000025FC000000000618C10201000025FC000000000618C10201000025FC000000000618C10201FF0002000541D70D0A"));
+
+        verifyPosition(decoder, binary(
+                "787822220F0C1D023305C9027AC8180C46586000140001CC00287D001F71000001000820860D0A"));
+
+        verifyAttributes(decoder, binary(
+                "797900262100000000020043006f006d006d0061006e00640020006500720072006f0072002100236e850d0a"));
+
+        verifyNotNull(decoder, binary(
+                "787803691604130318491475905BD30E25001E10BBF7635D14759006E626560501CC0028660F213228660F1F2828660EA81E286610731428660F20140D0A"));
+
+        verifyNotNull(decoder, binary(
+                "787800691710231108500200cc080c4e2fa5640c4e2fa66e0d0a"));
+
+        verifyNotNull(decoder, binary(
+                "787800171710231108290200cc080c4e2fa5640c4e2fa5640d0a"));
+
+        verifyNotNull(decoder, binary(
+                "787800691710231109200400cc080c4e2fa55a0c4ec0025a0c4e2fa6640c583918640d0a"));
+
+        verifyNotNull(decoder, binary(
+                "787800691710231111210700cc080c4e2fa55a0c4ec0025a0c4e39295a0c583918640c4e2fa6640c4e2fa4640c4ec854640d0a"));
+
+        verifyNotNull(decoder, binary(
+                "787800171710231112510600cc080c4e2fa55a0c4e2fa55a0c4e2fa55a0c4e2fa55a0c4e2fa55a0c4e2fa55a0d0a"));
+
+        verifyPosition(decoder, binary(
+                "7878121011091c0b1b2999058508040097a89e0034520d0a"));
+
+        verifyNotNull(decoder, binary(
+                "78780869170928113413ac9e17b30808514494fcf6e148596cb0ce2c67bd4a6eb0ce2c67bd4b0018e7d4333e55ec086be7f2df5fe48d8c94fc6657e48d8cb8f378510600cc0400d37a3d4600d37a3c5000d37a3b6400d376716400d305ac6400d393506e0d0a"));
+
+        verifyNotNull(decoder, binary(
+                "787808171709281135331491827b75594dc8d719a9708452cad719a9708550cad719a97086521491827b75574cac9e17b308085dc8d71939633947cad71939633a480700cc0400d37a3d5a00d37a3d5a00d37a3d5a00d37a3d5a00d37a3d5a00d37a3d5a00d37a3d5a0d0a"));
+
+        verifyNotNull(decoder, binary(
+                "78783b281108111002050136041bcf0000bf09000000000000000000000000000000000000000000000000000000000000000000000000ff00020007d3280d0a"));
+
+        verifyNotNull(decoder, binary(
+                "7878412c11030b011c1f013604cb8a00b17754cb8a00bef357cb8a00b73f5fcb8900b0e25fcb8900b6655fcb8a00b74960cb8a00b178620701001801eb40393800bbbde10d0a"));
+
+        verifyNotNull(decoder, binary(
+                "7878412c11030b012629013604cb8a00b17757cb8a00b73f5bcb8a00b7495ecb8900b0e25fcb8a00b1b9620000000000ff0000000000ffff01001801eb40393e00c0e6340d0a"));
+
+        verifyPosition(decoder, binary(
+                "787822221106160a1016c60278019407c7783800040001940504700046fc01030100065f570d0a"));
+
+        verifyAttributes(decoder, binary(
+                "797900143311070609020b00000000a0030046000109e4610d0a"));
+
+        verifyAttributes(decoder, binary(
+                "7979003e32110707083819000901fe0a060f006a1e3f24000000000000000000000000000000000000000000000000000000000000000000000000000000012116ba0d0a"));
+
+        verifyAttributes(decoder, binary(
+                "7979007632110706090217000901fe0a060f006a1c2024060f0053a429060f006a1d21060f0053a720060f006f151d0000000000000000000000003844d9e7f7e1773d60e327a9e442405cf28628b9c640a42bb0fc0d0244d855a38c220a4c802aa8da7dab50b0e235ef32dd5348ee0ce77a52540000010a205a0d0a"));
+
+        verifyAttributes(decoder, binary(
+                "7979006f210000000001426174746572793a352e3536562c4e4f524d414c3b20475052532a4c696e6b2055702047534d205369676e616c204c6576656c3a5374726f6e673b204750533a4f46463b2020204c4f434b3a4f46463b204254204d41433a4234413832383034343436323b007260880d0a"));
+
+        verifyPosition(decoder, binary(
+                "7979004a321106170c1b180cc900a875580b7ab4f00010350901fe0a007c0009112424007c000912240081004efe2100c500100f1200000000000000000000000000000000000000000000bc7c900d0a"));
+
+        verifyNotNull(decoder, binary(
+                "79790045321106170c1b13000901fe0a007c0009112424007c000912230081004efe1e00c500100f120000000000000000000000000000000000000710bef565574e37000000b26f140d0a"));
+
+        verifyNull(decoder, binary(
+                "787811010863586038760942a0010000010aa4000d0a"));
+
+        verifyNull(decoder, binary(
+                "78781f3511061a0b24330503107d06084889cb01000100000cfa20e3acd301333fcb0d0a"));
+
+        verifyPosition(decoder, binary(
+                "78783c340000000011061809130c0903107d2408488a5800144c00000000000001940b00b1000047ff000000000500018f42210000000100050003010b69450d0a"));
+
+        verifyPosition(decoder, binary(
+                "78783c34000000001106190336070903107d51084889b900152e0000000043b101940b00b10000480100000000050001a3422100000001000300011bdc7b5f0d0a"));
+
+        verifyAttributes(decoder, binary(
+                "78780a13c40604000201298f5b0d0a"));
+
+        verifyNotNull(decoder, binary(
+                "78781f12110616091835d0024bb93007d3fb783dd4c501940500f2006c8504a6e0370d0a"));
+
+        verifyPosition(decoder, binary(
+                "787822221106160a1016c60278019407c7783800040001940504700046fc01030100065f570d0a"));
+
+        verifyNotNull(decoder, binary(
+                "7878661500000000004459443d537563636573732100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010009e82b0d0a"));
+
+        verifyAttributes(decoder, binary(
+                "7979000894000000000338ba0d0a"));
+
+        verifyAttributes(decoder, binary(
+                "79790020940a03516080825457290502194200448892980691312079088572f50004d4350d0a"));
+
+        verifyPosition(decoder, binary(
+                "7979007121000000000143757272656e7420706f736974696f6e214c61743a4e35342e3733393333322c4c6f6e3a4532352e3237333237302c436f757273653a3132362e35332c53706565643a302e303030302c4461746554696d653a323031372d30352d3236202031303a32373a3437000bbee30d0a"));
+
+        verifyAttributes(decoder, binary(
+                "7979003F940D110315102A202141494F494C2C30322C3030382E3239302C3032392E3630302C3531394A2C303430302C3030382E3433302C302C30302C4142001678EA0D0A"));
+
+        verifyAttributes(decoder, binary(
+                "79790039940d2141494f494c2c30322c3030322e3732302c3032392e3530302c3532344a2c303130302c3030332e3430302c302c30302c393309ad72000d0a"));
+
+        verifyNull(decoder, binary(
+                "79790005840016BB1A0D0A"));
+
+        verifyAttributes(decoder, binary(
+                "797900089400000002e852d70d0a"));
+
+        verifyAttributes(decoder, binary(
+                "7979000794050000c9b63e0d0a"));
+
+        verifyNotNull(decoder, binary(
+                "78783b18100c0f1201010195271784005ab63617840002fa47178400ff8f4817840019f3491784005ab54b178400ff8e4c17840019f24cff0002012287c80d0a"));
+
+        verifyPosition(decoder, binary(
+                "7878251610051b0f1c34c5022515d504b5dcd20738080902d4022bdf009cba5006640201006759680d0a"));
+
+        verifyNotNull(decoder, binary(
+                "787866150000000000416c726561647920696e20746865207374617465206f66206675656c20737570706c7920746f20726573756d652c74686520636f6d6d616e64206973206e6f742072756e6e696e672100000000000000000000000000000000000001001981e50d0a"));
+
+        verifyAttributes(decoder, binary(
+                "78782d152500000000437574206f666620746865206675656c20737570706c793a2053756363657373210002013b898a0d0a"));
+
+        verifyAttributes(decoder, binary(
+                "787829152100000000526573746f7265206675656c20737570706c793a2053756363657373210002014077ce0d0a"));
+
+        verifyNull(decoder, binary(
+                "78780D01012345678901234500018CDD0D0A"));
+
+        verifyNull(decoder, binary(
+                "78780d0103534190360660610003c3df0d0a"));
+
+        verifyAttributes(decoder, binary(
+                "78780a13440604000201baaf540d0a"));
+
+        verifyAttributes(decoder, binary(
+                "787825160F0C1D0A2B21C8027AC8040C46581000146F0901CC00287D001F714804040301001C84CF0D0A"));
+
+        verifyPosition(decoder, binary(
+                "78781f120f0a140e150bc505e51e780293a9e800540000f601006e0055da00035f240d0a"),
+                position("2015-10-20 14:21:11.000", true, 54.94535, 24.01762));
+
+        verifyPosition(decoder, binary(
+                "787823120f081b121d37cb01c8e2cc08afd3c020d50201940701d600a1190041ee100576d1470d0a"));
+
+        verifyPosition(decoder, binary(
+                "78781F120B081D112E10CC027AC7EB0C46584900148F01CC00287D001FB8000380810D0A"));
+
+        verifyPosition(decoder, binary(
+                "787819100B031A0B1B31CC027AC7FD0C4657BF0115210001001CC6070D0A"));
+
+        verifyPosition(decoder, binary(
+                "787821120C010C0F151FCF027AC8840C4657EC00140001CC00287D001F720001000F53A00D0A"));
+
+        verifyPosition(decoder, binary(
+                "787825160B051B093523CF027AC8360C4657B30014000901CC00266A001E1740050400020008D7B10D0A"));
+
+        verifyPosition(decoder, binary(
+                "787819100e010903230ec803ae32a60653cded00180000020072feb70d0a"));
+
+        verifyPosition(decoder, binary(
+                "7878471e0e03110b0511c501c664fd074db73f0218a602e003433a002fed40433a0056e14e433a0056104e433a0056fd53433a002eed55433a007e4b57433a002ee25aff00020120f6720d0a"));
+
+        verifyNull(decoder, binary(
+                "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"));
+
+        verifyNull(decoder, binary(
+                "78788b818300000000534545464e2626004f04220045042626262b37393035343031353534362626262626260410041b0415041a04210415041926262b373930363433333031313526260410043d044f26262b373936303437383430363426260412043e0432043026262b373932383834373738383126262626262626262626262626262626232300020022155d0d0a"));
+
+        verifyPosition(decoder, binary(
+                "787822220e0914160f07c9021a362805090a7800d8b802d402c30e00a98a0105010213f4bb0d0a"));
+
+        verifyNull(decoder, binary(
+                "787811010864717003664467100f190a0002c6d20d0a"));
+
+        verifyNull(decoder, binary(
+                "787811010123456789012345100B3201000171930D0A"));
+
+        verifyNull(decoder, binary(
+                "78780d1f000000000000000200b196a20d0a"));
+
+        verifyPosition(decoder, binary(
+                "78781f12110819110216d402f250340828924055d4c801944600d300c09501429c830d0a"));
+
+        verifyPosition(decoder, binary(
+                "78782516110819110208d402f264dc08289a4058d4c70901944600d300c0954606040600014057e90d0a"));
+
+        verifyNull(decoder, binary(
+                "78780d010359339075005244340d0a"));
+
+        verifyNotNull(decoder, binary(
+                "787800691709261259400700cc0400d376714600d37a3d5000d37a3c5000d393505a00d3765d5a00d376735a00d32e6b640d0a"));
+
+        verifyNull(decoder, binary(
+                "787801080d0a"));
+
+        verifyNull(decoder, binary(
+                "78782E2A0F0C1D071139CA027AC8000C4658000014D83132353230313335333231373730373900000000000001002A6ECE0D0A"));
+
+        verifyNull(decoder, binary(
+                "7878058A000688290D0A"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Gt06ProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/Gt06ProtocolEncoderTest.java
new file mode 100644
index 000000000..aceaef434
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Gt06ProtocolEncoderTest.java
@@ -0,0 +1,22 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+public class Gt06ProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        Gt06ProtocolEncoder encoder = new Gt06ProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_ENGINE_STOP);
+
+        verifyCommand(encoder, command, binary("787812800c0000000052656c61792c312300009dee0d0a"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Gt30ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Gt30ProtocolDecoderTest.java
new file mode 100644
index 000000000..cb792ba09
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Gt30ProtocolDecoderTest.java
@@ -0,0 +1,30 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Gt30ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Gt30ProtocolDecoder decoder = new Gt30ProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$$005D3037811014    9955102834.000,A,3802.8629,N,02349.7163,E,0.00,,060117,,*13|1.3|26225BD"));
+
+        verifyPosition(decoder, text(
+                "$$005E3037811014    9999\u0003121909.000,A,3802.9133,N,02349.9354,E,0.00,,060117,,*18|1.8|264518B"));
+
+        verifyPosition(decoder, text(
+                "$$00633037811014    9999\u0002121901.000,A,3802.9137,N,02349.9334,E,2.86,18.16,060117,,*3E|1.8|262D752"));
+
+        verifyPosition(decoder, text(
+                "$$005E3037811014    9999\u0001121849.000,A,3802.9094,N,02349.9384,E,0.00,,060117,,*1C|1.2|2683812"));
+
+        verifyPosition(decoder, text(
+                "$$005B3037811124    9955161049.000,A,3802.9474,N,02241.1897,E,0.00,,021115,,*15|2.9|5A639"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/H02FrameDecoderTest.java b/src/test/java/org/traccar/protocol/H02FrameDecoderTest.java
new file mode 100644
index 000000000..bdb2ff37b
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/H02FrameDecoderTest.java
@@ -0,0 +1,71 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assert.assertEquals;
+
+public class H02FrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecodeShort() throws Exception {
+
+        H02FrameDecoder decoder = new H02FrameDecoder(0);
+
+        assertEquals(
+                binary("2a48512c3335353438383032303131333931312c56312c3031323934352c412c353233312e37393238332c4e2c30313332342e31303731382c452c302e30352c302c3137303231372c464646464646464623"),
+                decoder.decode(null, null, binary("2a48512c3335353438383032303131333931312c56312c3031323934352c412c353233312e37393238332c4e2c30313332342e31303731382c452c302e30352c302c3137303231372c4646464646464646230d0a")));
+
+        assertEquals(
+                binary("2441060116601245431311165035313006004318210e000000fffffbffff0024"),
+                decoder.decode(null, null, binary("2441060116601245431311165035313006004318210e000000fffffbffff0024")));
+
+        assertEquals(
+                binary("2441060116601245431311165035313006004318210e000000fffffbffff0024"),
+                decoder.decode(null, null, binary("2441060116601245431311165035313006004318210e000000fffffbffff00242a48512c343130363031313636302c56312c3132343535322c412c353033352e333132392c4e2c30303433312e383231312c452c3030302e32302c3030302c3133313131362c464646464642464623")));
+
+        assertEquals(
+                binary("2a48512c3335333538383036303031353536382c56312c3139333530352c412c3830392e303031302c532c333435342e383939372c572c302e30302c302e30302c3239313031332c65666666666266662c3030303264342c3030303030622c3030353338352c3030353261612c323523"),
+                decoder.decode(null, null, binary("2a48512c3335333538383036303031353536382c56312c3139333530352c412c3830392e303031302c532c333435342e383939372c572c302e30302c302e30302c3239313031332c65666666666266662c3030303264342c3030303030622c3030353338352c3030353261612c323523")));
+
+        assertEquals(
+                binary("24430025645511183817091319355128000465632432000100ffe7fbffff0000"),
+                decoder.decode(null, null, binary("24430025645511183817091319355128000465632432000100ffe7fbffff0000")));
+
+    }
+
+    @Test
+    public void testDecodeLong() throws Exception {
+
+        H02FrameDecoder decoder = new H02FrameDecoder(0);
+
+        assertEquals(
+                binary("24410600082621532131081504419390060740418306000000fffffbfdff0015060000002c02dc0c000000001f"),
+                decoder.decode(null, null, binary("24410600082621532131081504419390060740418306000000fffffbfdff0015060000002c02dc0c000000001f")));
+
+    }
+
+    @Test
+    public void testDecodeAlternative() throws Exception {
+
+        H02FrameDecoder decoder = new H02FrameDecoder(0);
+
+        assertEquals(
+                binary("2a48512c343230363131393133302c4e42522c3130323430332c3233382c312c302c372c313131312c323236342c36332c313131312c323236352c35382c313131312c323236362c35302c313131312c333133352c33372c313131312c3630352c33332c313131312c343932302c33302c313131312c3630372c32382c3131303131372c46464646444646462c3623"),
+                decoder.decode(null, null, binary("2a48512c343230363131393133302c4e42522c3130323430332c3233382c312c302c372c313131312c323236342c36332c313131312c323236352c35382c313131312c323236362c35302c313131312c333133352c33372c313131312c3630352c33332c313131312c343932302c33302c313131312c3630372c32382c3131303131372c46464646444646462c3623")));
+
+        assertEquals(
+                binary("2442061191301024031101175540227006012321670c000095fffffbffff001f00000001f800ee010000000032"),
+                decoder.decode(null, null, binary("2442061191301024031101175540227006012321670c000095fffffbffff001f00000001f800ee010000000032")));
+
+        assertEquals(
+                binary("5800009814991024031101175540227006012321670c000095fffffbffff0033"),
+                decoder.decode(null, null, binary("5800009814991024031101175540227006012321670c000095fffffbffff0033")));
+
+        assertEquals(
+                binary("2a48512c343230363131393133302c4e42522c3130323431362c3233382c312c302c372c313131312c323236342c35332c313131312c323236352c36302c313131312c323236362c34342c313131312c333133352c34332c313131312c3630352c33392c313131312c343932302c32392c313131312c3630372c32342c3131303131372c46464646464246462c3623"),
+                decoder.decode(null, null, binary("2a48512c343230363131393133302c4e42522c3130323431362c3233382c312c302c372c313131312c323236342c35332c313131312c323236352c36302c313131312c323236362c34342c313131312c333133352c34332c313131312c3630352c33392c313131312c343932302c32392c313131312c3630372c32342c3131303131372c46464646464246462c3623")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/H02ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/H02ProtocolDecoderTest.java
new file mode 100644
index 000000000..4a5eadf52
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/H02ProtocolDecoderTest.java
@@ -0,0 +1,261 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Position;
+
+public class H02ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        H02ProtocolDecoder decoder = new H02ProtocolDecoder(null);
+
+        verifyNotNull(decoder, buffer(
+                "*hq,356327081001239,VP1,V,470,002,92,3565,0Y92,19433,30Y92,1340,29#"));
+
+        verifyPosition(decoder, binary(
+                "2435248308419329301047591808172627335900074412294E024138FEFFFFFFFF01120064BA73005ECC"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,4210209006,V1,054048,A,2828.2297,N,07733.4332,E,000.5,047,4,080918,EEE7FBDF,4261193,0#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,353505221264507,V2,100220,0,5238.26259,N,00507.33983,E,0.25,0,280917,FFFFFFFF,cc,28,  db,d75b#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,,V1,173212,A,2225.78879,S,02829.19021,E,0.00,0,290418,FFFFFBFF#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,353505221264507,VI1,075146,0,5238.25900,N,00507.33429,E,0.54,0,250917,FFFFFFFF,cc,28,  db,d75b#"));
+
+        verifyNull(decoder, buffer(
+                "*HQ,353505510948929,V1,,V,,N,,E,0.00,0,,FFFFF7FF,f0,a,11a0,c0c6#"));
+
+        verifyPosition(decoder, buffer(
+                "*hq,356327080425330,VP1,A,2702.7245,S,15251.9311,E,0.48,0.0000,080917#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,4209951296,V19,214452,A,5201.0178,N,01830.5029,E,000.00,000,200417,,195.63.13.195,89480610500392633029,BFFFFBFF#"));
+
+        verifyPosition(decoder, buffer(
+                "*hq,356327080425330,VP1,A,2702.7215,S,15251.9309,E,0.62,0.0000,050917#"));
+
+        verifyNull(decoder, buffer(
+                "*HQ,356327080425330,XT,1,100#"));
+
+        verifyAttributes(decoder, buffer(
+                "*HQ,353111080001055,V3,044855,28403,01,001450,011473,158,-62,0292,0,X,030817,FFFFFBFF#"));
+
+        verifyPosition(decoder, binary(
+                "2442091341332059572807175137358006000183640e000000fffffbfdff001f080000000000ea1e0000000021"));
+
+        verifyNull(decoder, buffer(
+                "*HQ,4109198974,#"));
+
+        verifyAttributes(decoder, buffer(
+                "*HQ,1700086468,LINK,180902,15,0,84,0,0,240517,FFFFFBFF#"));
+
+        verifyAttributes(decoder, buffer(
+                "*HQ,355488020882405,V3,095426,74001,01,010278,045142,128,-92,02DE,0,X,090517,FFFFFBFF#"));
+
+        verifyAttributes(decoder, buffer(
+                "*HQ,355488020882405,V3,095426,74001,04,010278,045142,128,-92,010278,026311,125,,010278,026582,125,,010278,028322,119,,02DD,0,X,090517,FFFFFBFF#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,4109179024,V19,181519,V,3853.2587,S,06205.9175,W,000.00,000,090217,,5492932630888,8954315265044716555?,FFFFFBFF#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,8161289587,V1,181933,A,5444.3994,N,02516.3844,E,000.05,000,090317,FFFFBBFF,246,03,00002,41565#"));
+
+        verifyPosition(decoder, binary(
+                "2421305109380127171003170520046500100286297e003085ffffdfffff03440069129344006400001151415a20"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,2130510938,V1,012632,A,0520.0663,N,10028.6324,E,0.286,023,100317,FFFFDFFF,69129336,0,100.0,18,5141,5A20#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,4210209006,V1,201812,A,2608.9437,N,08016.2521,W,000.80,000,150317,EFE7F9FF,310,260,0,0,6#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,4210209006,V1,201844,A,2608.9437,N,08016.2521,W,000.80,000,150317,FFFFF9FF,310,260,0,0,6#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,4109179024,V19,103732,V,3853.2770,S,06205.8678,W,000.00,000,100217,,5492932630888,8954314165044716555?,FFFFFBFF#"));
+
+        verifyAttributes(decoder, buffer(
+                "*HQ,4109179024,NBR,103732,722,310,0,6,8106,32010,23,8101,22007,25,8106,12010,23,8106,22105,22,8101,22012,16,8106,42010,5,100217,FFFFFBFF,5#"));
+
+        verifyAttributes(decoder, buffer(
+                "*HQ,355488020930796,V3,002339,62160,06,024852,035421,148,0,024852,035425,143,,022251,036482,137,,024852,000335,133,,024852,031751,133,,024852,035423,133,,02A1,0,X,010104,EFE7FBFF#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,4106012736,V1,224434,A,1827.3855,N,06705.7577,W,000.00,000,100117,FFFFFBFF,310,260,49101,1753,5#"));
+
+        verifyAttributes(decoder, buffer(
+                "*HQ,4208150188,NBR,210249,260,6,0,7,1014,50675,37,1014,50633,27,1014,17933,18,1014,17231,15,1014,50632,12,1014,13211,11,1014,17031,10,281216,FFFFFBFF,2#"));
+
+        verifyAttributes(decoder, buffer(
+                "*HQ,1600068812,NBR,141335,262,02,255,6,431,17003,26,431,11101,13,431,6353,13,431,22172,13,431,11093,13,431,60861,10,151216,FFFFFBFF#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,353588020068342,V1,084436,A,3257.01525,N,00655.03865,W,57.78,40,011216,FFFBFFFF,25c,a, 154,b04c#"));
+
+        verifyNull(decoder, buffer(
+                "*HQ,356803210091319,BS,,2d4,a,1b63,1969,26,1b63,10b2,31,0,0,25,,ffffffff,60#"));
+
+        verifyAttributes(decoder, buffer(
+                "*HQ,1400046168,NBR,160169,460,0,1,4,9338,3692,150,9338,3691,145,9338,3690,140,9338,3692,139,180813,FFFFFBFF#"));
+
+        verifyAttributes(decoder, buffer(
+                "*HQ,1600068860,NBR,120156,262,03,255,6,802,54702,46,802,5032,37,802,54782,30,802,5052,28,802,54712,12,802,5042,12,081116,FFFFFBFF#"));
+
+        verifyAttributes(decoder, buffer(
+                "*HQ,1600068860,NBR,110326,262,03,255,6,802,23152,23,812,49449,14,802,35382,13,802,35402,11,812,56622,09,802,23132,04,081116,FFFFFBFF#"));
+
+        verifyAttributes(decoder, buffer(
+                "*HQ,1600068860,LINK,112137,20,8,67,0,0,081116,FFFFFBFF#"));
+
+        verifyAttributes(decoder, buffer(
+                "*HQ,355488020533263,V3,121536,65501,04,000152,014001,156,-64,000161,010642,138,,000152,014003,129,,000152,013973,126,,02E4,0,X,071116,FFFFFBFF#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,4209917484,V19,093043,V,5052.9749,N,00426.4322,E,000.00,000,130916,,0032475874141,8944538530000543700F,FFFFFBFF#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,353505220873067,V1,,V,4605.75732,N,01430.73863,E,0.00,0,,FFFFFFEF,125,194,  64,d3#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,4210051415,V1,164549,A,0956.3869,N,08406.7068,W,000.00,000,221215,FFFFFBFF,712,01,0,0,6#"),
+                position("2015-12-22 16:45:49.000", true, 9.93978, -84.11178));
+
+        verifyAttributes(decoder, buffer(
+                "*HQ,1451316451,NBR,112315,724,10,2,2,215,2135,123,215,2131,121,011215,FFFFFFFF#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,1451316485,V1,121557,A,-23-3.3408,S,-48-2.8926,W,0.1,158,241115,FFFFFFFF#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,1451316485,V1,121557,A,-23-35.3408,S,-48-2.8926,W,0.1,158,241115,FFFFFFFF#"));
+        
+        verifyPosition(decoder, buffer(
+                "*HQ,355488020119695,V1,050418,,2827.61232,N,07703.84822,E,0.00,0,031015,FFFEFBFF#"),
+                position("2015-10-03 05:04:18.000", false, 28.46021, 77.06414));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,1451316409,V1,030149,A,-23-29.0095,S,-46-51.5852,W,2.4,065,070315,FFFFFFFF#"),
+                position("2015-03-07 03:01:49.000", true, -23.48349, -46.85975));
+
+        verifyNull(decoder, buffer(
+                "*HQ,353588020068342,V1,000000,V,0.0000,0,0.0000,0,0.00,0.00,000000,ffffffff,000106,000002,000203,004c87,16#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,3800008786,V1,062507,V,3048.2437,N,03058.5617,E,000.00,000,250413,FFFFFBFF#"));
+        
+        verifyPosition(decoder, buffer(
+                "*HQ,4300256455,V1,111817,A,1935.5128,N,04656.3243,E,0.00,100,170913,FFE7FBFF#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,123456789012345,V1,155850,A,5214.5346,N,2117.4683,E,0.00,270.90,131012,ffffffff,000000,000000,000000,000000#"));
+        
+        verifyPosition(decoder, buffer(
+                "*HQ,353588010001689,V1,221116,A,1548.8220,S,4753.1679,W,0.00,0.00,300413,ffffffff,0002d4,000004,0001cd,000047#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,354188045498669,V1,195200,A,701.8915,S,3450.3399,W,0.00,205.70,050213,ffffffff,000243,000000,000000#"));
+        
+        verifyPosition(decoder, buffer(
+                "*HQ,2705171109,V1,213324,A,5002.5849,N,01433.7822,E,0.00,000,140613,FFFFFFFF#"));
+        
+        verifyPosition(decoder, buffer(
+                "*TH,2020916012,V1,050316,A,2212.8745,N,11346.6574,E,14.28,028,220902,FFFFFBFF#\r\n"));
+        
+        verifyPosition(decoder, buffer(
+                "*TH,2020916012,V4,S17,130305,050316,A,2212.8745,N,11346.6574,E,14.28,028,220902,FFFFFBFF#"));
+        
+        verifyPosition(decoder, buffer(
+                "*TH,2020916012,V4,S14,100,10,1,3,130305,050316,A,2212.8745,N,11346.6574,E,14.28,028,220902,FFFFFBFF#"));
+        
+        verifyPosition(decoder, buffer(
+                "*TH,2020916012,V4,S20,ERROR,130305,050316,A,2212.8745,N,11346.6574,E,14.28,028,220902,FFFFFBFF#"));
+        
+        verifyPosition(decoder, buffer(
+                "*TH,2020916012,V4,S20,DONE,130305,050316,A,2212.8745,N,11346.6574,E,14.28,028,220902,F7FFFBFF#"));
+        
+        verifyPosition(decoder, buffer(
+                "*TH,2020916012,V4,R8,ERROR,130305,050316,A,2212.8745,N,11346.6574,E,14.28,028,220902,FFFFFBFF#"));
+        
+        verifyPosition(decoder, buffer(
+                "*TH,2020916012,V4,S23,165.165.33.250:8800,130305,050316,A,2212.8745,N,11346.6574,E,14.28,028,220902,FFFFFBFF#"));
+        
+        verifyPosition(decoder, buffer(
+                "*TH,2020916012,V4,S24,thit.gd,130305,050316,A,2212.8745,N,11346.6574,E,14.28,028,220902,FFFFFBFF#"));
+        
+        verifyPosition(decoder, buffer(
+                "*TH,2020916012,V4,S1,OK,pass_word,130305,050316,A,2212.8745,N,11346.6574,E,14.28,028,220902,FFFFFBFD#"));
+        
+        verifyPosition(decoder, buffer(
+                "*HQ,353588020068342,V1,062840,A,5241.1249,N,954.9490,E,0.00,0.00,231013,ffffffff,000106,000002,000203,004c87,24#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,353505220903211,V1,075228,A,5227.5039,N,01032.8443,E,0.00,0,231013,FFFBFFFF,106,14, 201,2173#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ,353505220903211,V1,140817,A,5239.3538,N,01003.5292,E,21.03,312,221013,FFFBFFFF,106,14, 203,1cd#"));
+        
+        verifyPosition(decoder, buffer(
+                "*HQ,356823035368767,V1,083618,A,0955.6392,N,07809.0796,E,0.00,0,070414,FFFBFFFF,194,3b5,  71,c9a9#"));
+
+        verifyNull(decoder, buffer(
+                "*HQ,8401016597,BASE,152609,0,0,0,0,211014,FFFFFFFF#"));
+
+        verifyPosition(decoder, binary(
+                "2441060116601245431311165035313006004318210e000000fffffbffff0024"));
+
+        verifyPosition(decoder, binary(
+                "24410600082621532131081504419390060740418306000000fffffbfdff0015060000002c02dc0c000000001f"),
+                position("2015-08-31 21:53:21.000", true, 4.69898, -74.06971));
+
+        verifyPosition(decoder, binary(
+                "2427051711092133391406135002584900014337822e000000ffffffffff0000"));
+
+        verifyPosition(decoder, binary(
+                "2427051711092134091406135002584900014337822e000000ffffffffff0000"));
+
+        verifyPosition(decoder, binary(
+                "2410307310010503162209022212874500113466574C014028fffffbffff0000"));
+
+        verifyPosition(decoder, binary(
+                "2441090013450831250401145047888000008554650e000000fffff9ffff001006000000000106020299109c01"));
+
+        verifyPosition(decoder, binary(
+                "24270517030820321418041423307879000463213792000056fffff9ffff0000"));
+
+        verifyPosition(decoder, binary(
+                "2441091144271222470112142233983006114026520E000000FFFFFBFFFF0014060000000001CC00262B0F170A"));
+        
+        verifyPosition(decoder, binary(
+                "24971305007205201916101533335008000073206976000000effffbffff000252776566060000000000000000000049"));
+
+    }
+
+    @Test
+    public void testDecodeStatus() throws Exception {
+
+        H02ProtocolDecoder decoder = new H02ProtocolDecoder(null);
+
+        verifyAttribute(decoder, buffer(
+                "*HQ,2705171109,V1,213324,A,5002.5849,N,01433.7822,E,0.00,000,140613,FFFFFFFF#"),
+                Position.KEY_STATUS, 0xFFFFFFFFL);
+
+        verifyAttribute(decoder, binary(
+                "2441091144271222470112142233983006114026520E000000FFFFFBFFFF0014060000000001CC00262B0F170A"),
+                Position.KEY_STATUS, 0xFFFFFBFFL);
+
+        verifyAttribute(decoder, buffer(
+                "*HQ,4210051415,V1,164549,A,0956.3869,N,08406.7068,W,000.00,000,221215,FFFFFBFF,712,01,0,0,6#"),
+                Position.KEY_STATUS, 0xFFFFFBFFL);
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/H02ProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/H02ProtocolEncoderTest.java
new file mode 100644
index 000000000..a7ce3fc7e
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/H02ProtocolEncoderTest.java
@@ -0,0 +1,72 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.LocalTime;
+import java.time.ZoneOffset;
+import java.util.Date;
+
+import static org.junit.Assert.assertEquals;
+
+public class H02ProtocolEncoderTest extends ProtocolTest {
+
+    private H02ProtocolEncoder encoder = new H02ProtocolEncoder();
+    private Date time = Date.from(
+            LocalDateTime.of(LocalDate.now(), LocalTime.of(1, 2, 3)).atZone(ZoneOffset.systemDefault()).toInstant());
+
+    @Test
+    public void testAlarmArmEncode() throws Exception {
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_ALARM_ARM);
+
+        assertEquals("*HQ,123456789012345,SCF,010203,0,0#", encoder.encodeCommand(command, time));
+    }
+
+    @Test
+    public void testAlarmDisarmEncode() throws Exception {
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_ALARM_DISARM);
+
+        assertEquals("*HQ,123456789012345,SCF,010203,1,1#", encoder.encodeCommand(command, time));
+    }
+
+    @Test
+    public void testEngineStopEncode() throws Exception {
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_ENGINE_STOP);
+
+        assertEquals("*HQ,123456789012345,S20,010203,1,1#", encoder.encodeCommand(command, time));
+    }
+
+    @Test
+    public void testEngineResumeEncode() throws Exception {
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_ENGINE_RESUME);
+
+        assertEquals("*HQ,123456789012345,S20,010203,1,0#", encoder.encodeCommand(command, time));
+    }
+
+    @Test
+    public void testPositionPeriodicEncode() throws Exception {
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.set(Command.KEY_FREQUENCY, 10);
+        command.setType(Command.TYPE_POSITION_PERIODIC);
+
+        assertEquals("*HQ,123456789012345,S71,010203,22,10#", encoder.encodeCommand(command, time));
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/HaicomProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/HaicomProtocolDecoderTest.java
new file mode 100644
index 000000000..6d879daf2
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/HaicomProtocolDecoderTest.java
@@ -0,0 +1,28 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class HaicomProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        HaicomProtocolDecoder decoder = new HaicomProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$GPRS012497007097169,T100001,150618,230031,5402267400332464,0004,2014,000001,,,1,00#V040*"),
+                position("2015-06-18 23:00:31.000", true, 40.37790, -3.54107));
+
+        verifyPosition(decoder, text(
+                "$GPRS123456789012345,602S19A,100915,063515,7240649312041079,0019,3156,111000,10004,0000,11111,00LH#V037"));
+        
+        verifyPosition(decoder, text(
+                "$GPRS123456789012345,T100001,141112,090751,7240649312041079,0002,1530,000001,,,1,00#V039*"));
+        
+        verifyPosition(decoder, text(
+                "$GPRS012497007101250,T100001,141231,152235,7503733600305643,0000,2285,000001,,,1,00#V041*"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/HomtecsProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/HomtecsProtocolDecoderTest.java
new file mode 100644
index 000000000..9acf2ce87
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/HomtecsProtocolDecoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class HomtecsProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        HomtecsProtocolDecoder decoder = new HomtecsProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "MDS0001_R6d1821f7,170323,143601.00,04,,,,,,,,,"));
+
+        verifyPosition(decoder, text(
+                "MDS0001_R6d1821f7,170323,143621.00,06,5105.29914,N,11400.52675,W,0.223,198.41,1,2.12,1042.3"));
+
+        verifyPosition(decoder, text(
+                "strommabus939_R01272028,160217,191003.00,06,5540.12292,N,01237.49814,E,0.391,,1,1.27,1.2"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/HuaShengFrameDecoderTest.java b/src/test/java/org/traccar/protocol/HuaShengFrameDecoderTest.java
new file mode 100644
index 000000000..0f24d4b5c
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/HuaShengFrameDecoderTest.java
@@ -0,0 +1,33 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assert.assertEquals;
+
+public class HuaShengFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        HuaShengFrameDecoder decoder = new HuaShengFrameDecoder();
+
+        assertEquals(
+                binary("c0010c00120060000000000004000600010100c0"),
+                decoder.decode(null, null, binary("c0010c00120060000000000004000600010100c0")));
+
+        assertEquals(
+                binary("c0010c003e0002000000000010020012a0014f42445f3347315f56312e302e330013a0043335353835353035303434303635380006a08701000006a0a1035fc0"),
+                decoder.decode(null, null, binary("c0010c003e0002000000000010020012a0014f42445f3347315f56312e302e330013a0043335353835353035303434303635380006a08701000006a0a1035fc0")));
+
+        assertEquals(
+                binary("c00000003faa0000000000003ea5a5005a3f00c000000031363037303530373132353700e6d186ffcc7a25002201160010000000010015000000000000000000c0"),
+                decoder.decode(null, null, binary("c00000003faa0000000000003ea5a5005a3f00dbdc00000031363037303530373132353700e6d186ffcc7a25002201160010000000010015000000000000000000c0")));
+
+        assertEquals(
+                binary("C000000041AA00000000000030C000000031353035323630373538323800ADDCC100226AEF0000000000120005000100151206EF0504E99975002903EB80556492CEC0"),
+                decoder.decode(null, null, binary("C000000041AA00000000000030DBDC00000031353035323630373538323800ADDCC100226AEF0000000000120005000100151206EF0504E99975002903EB80556492CEC0")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/HuaShengProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/HuaShengProtocolDecoderTest.java
new file mode 100644
index 000000000..319d34e4c
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/HuaShengProtocolDecoderTest.java
@@ -0,0 +1,45 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class HuaShengProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        HuaShengProtocolDecoder decoder = new HuaShengProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "c0010c003c0002000000000044020010a0014f42445f3347315f56322e320013a0043335353835353035313032303536360006a08700000006a0a105c9c0"));
+
+        verifyNull(decoder, binary(
+                "c000000077aa0200000000000e000100143347315f48312e315f56312e30372e54000300133335353835353035303434303635380004000b3531323030303000050005010006000400070004000800050000090018383936313032353431343533333239313833360d000a000f796573696e7465726e6574c0"));
+
+        verifyPosition(decoder, binary(
+                "c00000004baa0000000000000f8000000031363130323030373236333600e6d4f9ffcc78c700000022003600000001001500000000000000000000059bffffffffff0005000a040300000253c0"));
+
+        verifyPosition(decoder, binary(
+                "c00000004baa000000000000098000000031363130303732323236343700e6d4efffcc789f000000000026000000010015000000000000000000000488ffffffffff0005000a10060000008dc0"));
+
+        verifyPosition(decoder, binary(
+                "c00000004baa000000000000098000000031363130303732323236343700e6d4efffcc789f000000000026000000010015000000000000000000000488ffffffffff0005000a10060000008dc0"));
+
+        verifyPosition(decoder, binary(
+                "c00000004baa00000000000005c400000131363037303630323537303800e6c82effcc7cb0003900a30089000000010015000000000000000000f20559ff577ce3980005000a060500000087c0"));
+
+        verifyNull(decoder, binary(
+                "c0010c003e0002000000000010020012a0014f42445f3347315f56312e302e330013a0043335353835353035303434303635380006a08701000006a0a1035fc0"));
+
+        verifyNull(decoder, binary(
+                "c0010c00120060000000000004000600010100c0"));
+
+        verifyNull(decoder, binary(
+                "C00000007EAA020000000000010001001047315F48312E305F56312E3000030013383632393530303238353334333036000400144C342D56374C673979497A7A2D724A6D0005000501000600084341524400070008434152440008000500000900183839383630303530313931343436313130393134000A0009434D4E4554C0"));
+
+        verifyPosition(decoder, binary(
+                "C000000041AA00000000000030C000000031353035323630373538323800ADDCC100226AEF0000000000120005000100151206EF0504E99975002903EB80556492CEC0"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/HuabaoFrameDecoderTest.java b/src/test/java/org/traccar/protocol/HuabaoFrameDecoderTest.java
new file mode 100644
index 000000000..2d3937903
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/HuabaoFrameDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assert.assertEquals;
+
+public class HuabaoFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        HuabaoFrameDecoder decoder = new HuabaoFrameDecoder();
+
+        assertEquals(
+                binary("7e307e087d557e"),
+                decoder.decode(null, null, binary("7e307d02087d01557e")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/HuabaoProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/HuabaoProtocolDecoderTest.java
new file mode 100644
index 000000000..d4ae3b50c
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/HuabaoProtocolDecoderTest.java
@@ -0,0 +1,69 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class HuabaoProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        HuabaoProtocolDecoder decoder = new HuabaoProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "7E01000021013345678906000F002C012F373031313142534A2D4D3742203030303030303001D4C1423838383838B47E"));
+
+        verifyPosition(decoder, binary(
+                "7e020000400303000002280042000000000000000301618ab406c31ec800000000000518092116145701040000047830011031010aeb16000c00b28986011780108622216500060089ffffffffc37e"));
+
+        verifyPosition(decoder, binary(
+                "7E0200002A013833501744001900000000000000C201597FA806CC01580080000000081508180721210104000002F502020000030200009F7E"));
+
+        verifyPositions(decoder, binary(
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
+
+        verifyAttributes(decoder, binary(
+                "7E0200002F01357888888800B60000000000000003015972B406CBF6B802230000000116061317571301040000000003020000EB0700050001016708B37E"));
+
+        verifyPositions(decoder, binary(
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
+
+        verifyPosition(decoder, binary(
+                "7e02000054093037612710000700000000000000010223aca000dc9dd800000000000017121417122133362a4d30302c34352c31313336393042383030313233303026303030303030303030303030263132333435363738393031323334353623897e"));
+
+        verifyPosition(decoder, binary(
+                "7e0200002c00160128561400020000000000040001005de1f7065c6cef00000000000017011710044201040000a9002a02000030011b3101030c7e"));
+
+        verifyPosition(decoder, binary(
+                "7e0200002c00160128561400030000000000040007005de13c065c6cdb00160000000017011710054201040000a9002a02000030011b310104e47e"));
+
+        verifyNull(decoder, binary(
+                "7e0100002d0141305678720024002c012f373031313142534a2d41362d424400000000000000000000003035363738373201d4c14238383838386d7e"));
+
+        verifyNull(decoder, binary(
+                "7E0100002D013511221122000500000000373031303748422D52303347424400000000000000000000003233363631303402CBD5424136383630387E"));
+
+        verifyNull(decoder, binary(
+                "7e0100002d007089994489002800000000000000000048422d523033474244000000000000000000000031393036373531024142433030303030d17e"));
+
+        verifyNull(decoder, binary(
+                "7E0102000E013511221122000661757468656E7469636174696F6E3F7E"));
+
+        verifyPosition(decoder, binary(
+                "7E02000032013511221122000700000000000C000301578CC006CA3A5C00470000000014072317201501040000000030011631010BD07E"));
+
+        verifyNull(decoder, binary(
+                "7E010200100940278494700084323031313131303831313333323139369F7E"));
+
+        verifyNull(decoder, binary(
+                "7e010000190940278494700012000000000000000000000000000000000000094027849470000a7e"));
+
+        verifyPosition(decoder, binary(
+                "7e0200002e094027587492000a000000010000000a03083db7001329f3000000140000130412164952010400000012360a0002341502cb0c20085c107e"));
+
+        verifyPosition(decoder, binary(
+                "7e020000220014012499170007000000000000400e012af16f02cbd2ba000000000000150101194257010400000077a97e"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/HuabaoProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/HuabaoProtocolEncoderTest.java
new file mode 100644
index 000000000..771e6d28c
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/HuabaoProtocolEncoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Ignore;
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+public class HuabaoProtocolEncoderTest extends ProtocolTest {
+
+    @Ignore
+    @Test
+    public void testEncode() throws Exception {
+
+        HuabaoProtocolEncoder encoder = new HuabaoProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_ENGINE_STOP);
+
+        verifyCommand(encoder, command, binary("7e81050001080201000027001ff0467e"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/HunterProProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/HunterProProtocolDecoderTest.java
new file mode 100644
index 000000000..f0697f423
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/HunterProProtocolDecoderTest.java
@@ -0,0 +1,18 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class HunterProProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        HunterProProtocolDecoder decoder = new HunterProProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                ">0002<$GPRMC,170559.000,A,0328.3045,N,07630.0735,W,0.73,266.16,200816,,,A77, s000078015180\",0MD"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/IdplProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/IdplProtocolDecoderTest.java
new file mode 100644
index 000000000..d211d80ce
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/IdplProtocolDecoderTest.java
@@ -0,0 +1,22 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class IdplProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        IdplProtocolDecoder decoder = new IdplProtocolDecoder(null);
+        
+        verifyPosition(decoder, text(
+                "*ID1,863071011086474,210314,153218,A,1831.4577,N,07351.1433,E,0.79,240.64,9,20,A,1,4.20,0,1,01,1,0,0,A01,R,935D#"),
+                position("2014-03-21 15:32:18.000", true, 18.524295, 73.852388333333));
+
+        verifyPosition(decoder, text(
+                "*ID1,863071011086474,210314,162752,A,1831.4412,N,07351.0983,E,0.04,213.84,9,25,A,1,4.20,0,1,01,1,0,0,A01,L,EA01#"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/IntellitracProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/IntellitracProtocolDecoderTest.java
new file mode 100644
index 000000000..00b7de094
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/IntellitracProtocolDecoderTest.java
@@ -0,0 +1,64 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class IntellitracProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        IntellitracProtocolDecoder decoder = new IntellitracProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "$OK:TRACKING"));
+        
+        verifyPosition(decoder, text(
+                "101000001,20100304075545,121.64547,25.06200,0,0,61,7,2,1,0,0.046,0.000,20100304075546,0"),
+                position("2010-03-04 07:55:45.000", true, 25.06200, 121.64547));
+
+        verifyPosition(decoder, text(
+                "1010000002,20030217132813,121.646060,25.061725,20,157,133,7,0,11,15,0.096,0.000"));
+
+        verifyPosition(decoder, text(
+                "1010000002,20030217132813,121.646060,25.061725,20,157,-133,7,0,11,15,0.096,0.000"));
+
+        verifyPosition(decoder, text(
+                "1001070919,20130405084206,37.903730,48.011377,0,0,235,10,2,2,0,20.211,0.153"));
+        
+        verifyPosition(decoder, text(
+                "1010000002,20030217144230,121.646102,25.061398,0,0,139,0,0,0,0,0.093,0.000"));
+        
+        verifyPosition(decoder, text(
+                "1010000004,20050513153524,121.646075,25.063675,0,166,50,6,1,0,0,0.118,0.000"));
+
+        verifyPosition(decoder, text(
+                "1010000004,20050513154001,121.646075,25.063675,0,166,55,7,1,0,0,0.096,0.000"));
+        
+        verifyPosition(decoder, text(
+                "1010000002,20030217132813,121.646060,25.061725,20,157,0,7,0,11,15"));
+        
+        verifyPosition(decoder, text(
+                "12345,1010000002,20030217132813,121.646060,25.061725,20,157,0,7,0,11,15"));
+        
+        verifyPosition(decoder, text(
+                "1010000002,20030217144230,121.646102,25.061398,0,0,0,7,2,0,0"));
+        
+        verifyPosition(decoder, text(
+                "$RP:12345,1010000002,20030217144230,121.646102,25.061398,0,0,0,7,2,0,0"));
+        
+        verifyPosition(decoder, text(
+                "1010000001,20030105092129,121.651598,25.052325,0,0,33,0,1,0,0"));
+        
+        verifyPosition(decoder, text(
+                "1010000001,20030105092129,-121.651598,-25.052325,0,0,33,0,1,0,0"));
+        
+        verifyPosition(decoder, text(
+                "1015210962,20131010144712,-77.070037,-12.097935,0,0,77,7,2,2,0,0,139446.8,2095,20131010144712,,0.103,0.000"));
+        
+        verifyPosition(decoder, text(
+                "1003269480,20131126100258,10.32989,49.93836,0,304,217,6,2,0,0,0.000,0.000,20131126100258,0,0,0,-40,0,0,-273,0,0,0,0"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/ItsProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/ItsProtocolDecoderTest.java
new file mode 100644
index 000000000..7523e29a0
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/ItsProtocolDecoderTest.java
@@ -0,0 +1,54 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class ItsProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        ItsProtocolDecoder decoder = new ItsProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$NRM,ROADRPA,1.8AIS,EA,01,L,869867036341099,,1,11032019,231048,19.25166667,N,73.04615167,E,0.0,230.21,17,12.8,0.80,0.80,airtel,0,1,13.5,4.2,0,O,22,404,90,0CC9,EBC8,19,0CC9,8992,16,0CC9,AB49,15,0CC9,AB44,14,0CC9,F03C,0000,00,002080,C9FBBF99"));
+
+        verifyPosition(decoder, text(
+                "$NRM,ROADRPA,1.7AIS,NR,01,L,869867036345389,,1,25022019,051716,25.12891000,N,75.85587833,E,7.6,350.00,14,284.8,1.00,1.00,AIRTEL,1,1,28.0,4.2,0,C,13,404,70,4E3B,3C84,11,4E3B,39B8,08,4E3B,3965,07,4E3B,48B5,07,4E3B,3C85,0000,00,000551,71978C6B"));
+
+        verifyPosition(decoder, text(
+                "$,03,XYZ123,0.0.1,TA,16,L,869867035297185,MH12AB1234,1,20,02,2019,10,59,13,023.482630,N,086.399673,E,000.1,015.19,21,212.3,01.12,00.58,NOSERV,0,1,00.0,4.6,1,C,11,404,75,082a,db3a,0000,0000,0000,0000,0000,0000,0000,0000,0000,0000,0000,0000,0000,01,000013,01dbd51f,"));
+
+        verifyPosition(decoder, text(
+                "$NRM,ROADRPA,1.7AIS,NR,01,L,869867036345389,,1,25022019,051716,25.12891000,N,75.85587833,E,7.6,350.00,14,284.8,1.00,1.00,AIRTEL,1,1,28.0,4.2,0,C,13,404,70,4E3B,3C84,11,4E3B,39B8,08,4E3B,3965,07,4E3B,48B5,07,4E3B,3C85,0000,00,000551,71978C6B"));
+
+        verifyPosition(decoder, text(
+                "$,1,CHVTS,CHVTS1.0,DT,16,L,861359039868243,861359039868243,1,05022019,071225,19.965062,N,73.736088,E,0,050,03,0632,6.67,6.75,Idea Cel,1,1,23.96,4.0,0,W,28,404,004,4e2b,49e,4e2bea86727ab3d6704e2bea7714e2be9d72,0000,00,001133,232"));
+
+        verifyPosition(decoder, text(
+                "$,04,XYZ123,0.0.1,TA,16,L,861359034100626,MH12AB1234,1,12,11,2018,08,53,08,018.489645,N,073.855972,E,000.0,220.04,12,593.0,01.13,00.75,AIRTEL,1,1,00.0,4.1,1,C,18,404,90,0c23,781a,5169,0c23,-093,0000,0000,0000,0000,0000,0000,0000,0000,0000,1000,01,000006,f906c65c,"));
+
+        verifyPosition(decoder, text(
+                "$,A,MFR,7.0,NR,01,L,869026034780985,PJ09BU1234,1,12112018,121953,12.756974,N,077.800025,E,000.0,318.03,15,794.0,001.3,000.7,TAMIL NAD,0,1,13.08,04.13,0,O,22,404,80,0919,71C1,0919,7168,19,0919,71c3,17,0919,71c2,11,0919,7167,09,0011,00,000173,D8,000000.00,,,"));
+
+        verifyPosition(decoder, text(
+                "$,04,XYZ123,0.0.1,TA,16,L,861359034100626,MH12AB1234,1,14,10,2018,04,50,52,018.489624,N,073.855980,E,000.0,039.86,13,584.1,01.11,00.75,AIRTEL,1,1,00.0,4.1,1,C,15,404,90,0c23,781a,0000,0000,0000,0000,0000,0000,0000,0000,0000,0000,0000,0000,1000,01,000005,13b75499,"));
+
+        verifyNull(decoder, text(
+                "$,01,XYZ123,0.0.1,861359034137271,MH12AB1234,"));
+
+        verifyNull(decoder, text(
+                "$,02,XYZ123,0.0.1,861359034137271,100,30,00.0,00005,00600,1000,01,00.1,00.0,"));
+
+        verifyPosition(decoder, text(
+                "$,EPB,EMR,861359034100626,SP,00,00,0000,00,00,00,V,000.000000,N,000.000000,E,000.0,000.0,000.00,N,MH12AB1234,0000000000000,d34679e1,"));
+
+        verifyPosition(decoder, text(
+                "$,03,XYZ123,0.0.1,TA,16,L,861359034137271,MH12AB1234,0,00,00,0000,00,00,00,000.000000,N,000.000000,E,000.0,000.00,00,000.0,00.00,00.00,IDEAIN,1,1,00.0,4.0,1,O,16,404,22,2797,11b7,11b9,2797,-087,11b8,2797,-093,11b4,2797,-106,0000,0000,0000,1000,01,000032,8173e058,"));
+
+        verifyPosition(decoder, text(
+                "$,04,XYZ123,0.0.1,BR,06,L,861359034137271,MH12AB1234,0,00,00,0000,00,00,00,000.000000,N,000.000000,E,000.0,000.00,00,000.0,00.00,00.00,IDEAIN,1,1,00.0,3.8,1,O,17,404,22,2797,11b7,11b9,2797,-093,11b8,2797,-098,0000,0000,0000,0000,0000,0000,1000,00,000006,abd26284,"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Ivt401ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Ivt401ProtocolDecoderTest.java
new file mode 100644
index 000000000..b0b416891
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Ivt401ProtocolDecoderTest.java
@@ -0,0 +1,60 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Ivt401ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Ivt401ProtocolDecoder decoder = new Ivt401ProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "(TLA,356917051007891,190118,090211,+16.986606,+82.242416,0,66,4,13,1,5,000,00,0.0,11.59,8.30,37.77,0.0,1,1.02,0,0,208,0,0,0,0,000000000,0,0,0,0,0,0,0,1,8654604,5,9,114)"));
+
+        verifyPosition(decoder, text(
+                "(TLN,862107032006249,230218,180500,+18.479728,+73.896339,30,0,944,13,1,5,111,11,0.00,10.88,6.31,29.55,0.00,0,0.99,66,0,0,88,95)"));
+
+        verifyPosition(decoder, text(
+                "(TLN,865933030026336,250118,063827,+18.598098,+73.806518,0,79,0,1,1,5,1200,0,0.0,11.50,4.00,36,0,0,1.00,0,0,12702,202,0)"));
+
+        verifyPosition(decoder, text(
+                "(TLA,865933030026336,250118,063838,+18.598110,+73.806518,0,334,0,1,1,5,1200,0,0.0,12.20,4.10,36,0,0,1.00,0,0,12704,0,0,0,0,0,0,0,0,0,0,0,0,1,0,3,203,0)"));
+
+        verifyNull(decoder, text(
+                "(TLB,356917050440515,0,0,+0.0,+0.0,0,0,0,0,0,0,000,00,0.00,12.21,7.95,26.57,0.0,1,1.12,0,0,0,1,90)"));
+
+        verifyPosition(decoder, text(
+                "(TLN,356917050440515,250118,094723,+0.0,+0.0,0,0,0,0,3,5,000,00,0.00,12.25,7.95,27.11,0.0,0,1.13,0,0,0,4,86)"));
+
+        verifyPosition(decoder, text(
+                "(TLA,356917050440515,250118,094733,+0.0,+0.0,0,0,0,0,3,5,000,00,0.00,12.25,7.95,27.20,0.0,0,1.12,0,0,0,0,0,0,0,000000000,0,1,0,0,0,0,0,1,0,0,5,70)"));
+
+        verifyPosition(decoder, text(
+                "(TLN,356917050440515,250118,094733,+0.0,+0.0,0,0,0,0,3,5,000,00,0.00,12.25,7.95,27.20,0.0,0,1.13,0,0,0,6,87)"));
+
+        verifyPosition(decoder, text(
+                "(TLN,356917050440515,250118,103541,+17.015546,+54.080841,0,0,31,12,1,5,000,00,0.0,0.00,8.04,28.59,M+0+0+0+0+0,0,1.12,0,0,2,48,30)"));
+
+        verifyPosition(decoder, text(
+                "(TLN,356917050291991,090315,133525,+12.990582,+77.589080,0,0,944,13,1,5,000,00,0.00,10.88,6.31,29.55,0.00,0,0.99,66,0,0,88,95)"));
+
+        verifyPosition(decoder, text(
+                "(TLN,356917050269732,061117,220046,+21.134126,+74.798561,51,28,204,14,1,5,100,00,0.0,13.92,7.82,23.74,0.0,1,1.33,-9,0,429,4848,67)"));
+
+        verifyPosition(decoder, text(
+                "(TLN,356917050269732,061117,220116,+21.137619,+74.800659,52,28,202,14,1,3,100,00,0.0,13.92,7.82,23.74,0.0,1,1.26,-23,0,445,4849,125)"));
+
+        verifyPosition(decoder, text(
+                "(TLA,356917050217335,190115,011336,+12.932403,+79.898887,0,0,71.7,08,3,10,000,00,0.00,10.41,7.07,26.84,0.00,0,0.99,63,0,0,0,0,0,0,000000000,0,0,0,0,0,0,0,2,0,0,14,86)"));
+
+        verifyPosition(decoder, text(
+                "(TLB,356917050291991,090315,133525,+12.990582,+77.589080,0,0,944,13,1,5,000,00,0.00,10.88,6.31,29.55,0.00,0,0.99,66,0,0,88,95)"));
+
+        verifyPosition(decoder, text(
+                "(TLL,356917050217335,190115,011336,+12.932403,+79.898887,0,0,71.7,08,3,10,000,00,0.00,10.41,7.07,26.84,0.00,0,0.99,63,0,0,0,0,0,0,000000000,0,0,0,0,0,0,0,2,0,0,14,86)"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/JpKorjarProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/JpKorjarProtocolDecoderTest.java
new file mode 100644
index 000000000..8179a2bae
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/JpKorjarProtocolDecoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class JpKorjarProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        JpKorjarProtocolDecoder decoder = new JpKorjarProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "KORJAR.PL,329587014519383,160910144240,52.247254N,021.013375E,0.00,1,F:4.18V,1 260 01 794B 3517,"));
+
+        verifyPosition(decoder, text(
+                "KORJAR.PL,329587014519383,160910144240,52.895515N,021.949151E,6.30,212,F:3.94V,0 260 01 794B 3519,"));
+
+        verifyPosition(decoder, text(
+                "KORJAR.PL,329587014519383,160910144240,52.895596N,021.949343E,12.46,087,L:2.18V,1 260 01 794B 3517,"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Jt600FrameDecoderTest.java b/src/test/java/org/traccar/protocol/Jt600FrameDecoderTest.java
new file mode 100644
index 000000000..ae0948987
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Jt600FrameDecoderTest.java
@@ -0,0 +1,39 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Jt600FrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Jt600FrameDecoder decoder = new Jt600FrameDecoder();
+
+        verifyFrame(
+                binary("24315011626912001b21111718095900000000000000000e0000005c000000000000000000"),
+                decoder.decode(null, null, binary("24315011626912001b21111718095900000000000000000e0000005c00000000000000000024315011626912001b22111708130400000000000000000e0000005a00000000000000000024315011626912001b22111708140400000000000000000e0000005a000000723e18a61b01")));
+
+        verifyFrame(
+                binary("2475604055531611002311111600311326144436028210791d016c0000001f070000000020c03c4f6d07d80ccf"),
+                decoder.decode(null, null, binary("2475604055531611002311111600311326144436028210791d016c0000001f070000000020c03c4f6d07d80ccf")));
+
+        verifyFrame(
+                binary("2475605035891613002328091601152806086750106533350c00000000000a000000000000e1ff4f97007f1607"),
+                decoder.decode(null, null, binary("2475605035891613002328091601152806086750106533350c00000000000a000000000000e1ff4f97007f1607")));
+
+        verifyFrame(
+                binary("28333132303832303032392C5730312C30323535332E333535352C452C323433382E303939372C532C412C3137313031322C3035333333392C302C382C32302C362C33312C352C32302C323029"),
+                decoder.decode(null, null, binary("28333132303832303032392C5730312C30323535332E333535352C452C323433382E303939372C532C412C3137313031322C3035333333392C302C382C32302C362C33312C352C32302C323029")));
+
+        verifyFrame(
+                binary("24312082002911001B171012053405243809970255335555000406140003EE2B91044D1F02"),
+                decoder.decode(null, null, binary("24312082002911001B171012053405243809970255335555000406140003EE2B91044D1F02")));
+
+        verifyFrame(
+                binary("28373536303430353535332c404a5429"),
+                decoder.decode(null, null, binary("28373536303430353535332c404a5429")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Jt600ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Jt600ProtocolDecoderTest.java
new file mode 100644
index 000000000..2bb4b0fa3
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Jt600ProtocolDecoderTest.java
@@ -0,0 +1,108 @@
+package org.traccar.protocol;
+
+import org.traccar.ProtocolTest;
+
+import org.junit.Test;
+
+public class Jt600ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Jt600ProtocolDecoder decoder = new Jt600ProtocolDecoder(null);
+
+        verifyPositions(decoder, binary(
+                "2475801263981711002713061813333723501622090221558f012f0000002a070000000020c055b88552191f000f0f0f07"));
+
+        verifyPositions(decoder, binary(
+                "24408111888821001B09060908045322564025113242329F0598000001003F0000002D00AB"));
+
+        verifyPositions(decoder, binary(
+                "2475609213701711002701010000020200000000000000000e00000000000f000000000020c164cd7b00d516000f0f0f02"));
+
+        verifyPositions(decoder, binary(
+                "24657060730131001b13111710361906538525079524797f000000000000000003f300036c"));
+
+        verifyPositions(decoder, binary(
+                "24624090196121001b19071703493631277203074235752f295800005308010000768b0822"));
+
+        verifyPositions(decoder, binary(
+                "24624090196123019519071703412131285623074214252f10560000130801000076850819071703420631282832074215165f172c0000030801000076850919071703422131282792074216635f222e0000130801000076850919071703423631282808074218261f212a0000130801000076860819071703435131283678074222928f08350000930801000076860919071703440631283003074223174f19500000930801000076870819071703445131279872074224584f07380000930801000076870819071703453631280643074227091f1b220000530801000076880919071703455131281043074228216f0a260000530801000076880819071703460631281229074228988f0c260000530801000076880819071703462131281551074229954f1f220000530801000076880919071703463631281289074230503f114e0000530801000076880819071703465131281186074230884f094f0000530801000076880819071703470631280308074231240f17500000530801000076880619071703472131280358074231636f0b1d0000530801000076890821"));
+
+        verifyPositions(decoder, binary(
+                "2475604055531611002311111600311326144436028210791d016c0000001f070000000020c03c4f6d07d80ccf"));
+
+        verifyPositions(decoder, binary(
+                "2475201509260111002313101503464722331560113555309F00000000002D0500CB206800F064109326381A03"));
+
+        verifyPositions(decoder, binary(
+                "2475605035891613002328091601152806086750106533350c00000000000a000000000000e1ff4f97007f1607"));
+
+        verifyPosition(decoder, buffer(
+                "(3301210003,U01,040812,185302,T,22.564025,N,113.242329,E,5.21,152,9,32%,00000000000011,10133,5173,22,100,1)"));
+
+        verifyPosition(decoder, buffer(
+                "(3301210003,U02,040812,185302,T,22.564025,N,113.242329,E,5,152,9,32%,00000000000011,10133,5173,22,100,1)"));
+
+        verifyPosition(decoder, buffer(
+                "(3301210003,U03,040812,185302,T,22.564025,N,113.242329,E,5,152,9,32%,00000000000011,10133,5173,22,100,1)"));
+
+        verifyNull(decoder, buffer(
+                "(3301210003,U04)"));
+
+        verifyPosition(decoder, buffer(
+                "(3301210003,U06,1,040812,185302,T,22.564025,N,113.242329,E,5,152,9,32%,0000000000011,10133,5173,22,100,1,300,100,10)"));
+
+        verifyPosition(decoder, buffer(
+                "(3460311327,U01,220916,135251,T,9.552607,N,13.658292,W,0.31,0,9,0%,00001001000000,11012,10,27,0,0,33)"));
+
+        verifyPosition(decoder, buffer(
+                "(3460311327,U01,010100,000024,F,0.000000,N,0.000000,E,0.00,0,0,100%,00000001000000,263,1,18,0,0,33)"));
+
+        verifyNull(decoder, buffer(
+                "(3460311327,@JT)"));
+
+        verifyPosition(decoder, buffer(
+                "(3460311327,U06,11,220916,135643,T,9.552553,N,13.658265,W,0.61,0,9,100%,00000001000000,11012,10,30,0,0,126,0,30)"));
+
+        verifyPosition(decoder, buffer(
+                "(3460311327,U06,10,220916,140619,T,9.552495,N,13.658227,W,0.43,0,7,0%,00101001000000,11012,10,0,0,0,126,0,30)"));
+
+        verifyPositions(decoder, binary(
+                "24311021600111001B16021105591022329862114046227B0598095080012327951435161F"),
+                position("2011-02-16 05:59:10.000", true, 22.54977, -114.07705));
+
+        verifyPositions(decoder, binary(
+                "24312082002911001B171012052831243810120255336425001907190003FD2B91044D1FA0"));
+
+        verifyPositions(decoder, binary(
+                "24312082002911001B1710120533052438099702553358450004061E0003EE000000000C00"));
+
+        verifyPositions(decoder, binary(
+                "24608111888821001B09060908045322564025113242329F0598000001003F0000002D00AB"));
+
+        verifyPosition(decoder, buffer(
+                "(3110312099,W01,11404.6204,E,2232.9961,N,A,040511,063736,4,7,100,4,17,1,1,company)"),
+                position("2011-05-04 06:37:36.000", true, 22.54994, 114.07701));
+
+        verifyPosition(decoder, buffer(
+                "(3120820029,W01,02553.3555,E,2438.0997,S,A,171012,053339,0,8,20,6,31,5,20,20)"));
+
+        verifyPosition(decoder, buffer(
+                "(3330104377,U01,010100,010228,F,00.000000,N,000.000000,E,0,0,0,0%,00001000000000,741,14,22,0,206)"));
+
+        verifyNull(decoder, buffer(
+                "(6221107674,2,U09,129,2,A,280513113036,E,02711.0500,S,1721.0876,A,030613171243,E,02756.7618,S,2300.0325,3491,538200,14400,1)"));
+
+        verifyPosition(decoder, buffer(
+                "(3301210003,U02,040812,185302,T,00.000000,N,000.000000,E,0,0,0,0%,00000000000011,741,51,22,0,1,05)"));
+
+        verifyPosition(decoder, buffer(
+                "(3301210003,U06,4,250916,133207,T,7.011013,N,25.060708,W,27.61,102,10,0%,00101011000000,0,1,0,448,0,126,1,30)"));
+
+        verifyPosition(decoder, buffer(
+                "(3551001012,U01,010100,000032,F,0.000000,N,0.000000,E,0.00,0,0,10%,00000000010000,15748,7923,23,0,0,3E)"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Jt600ProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/Jt600ProtocolEncoderTest.java
new file mode 100644
index 000000000..100d7492a
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Jt600ProtocolEncoderTest.java
@@ -0,0 +1,37 @@
+package org.traccar.protocol;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+public class Jt600ProtocolEncoderTest extends ProtocolTest {
+    Jt600ProtocolEncoder encoder = new Jt600ProtocolEncoder();
+    Command command = new Command();
+
+    @Test
+    public void testEngineStop() throws Exception {
+        command.setType(Command.TYPE_ENGINE_STOP);
+        assertEquals("(S07,0)", encoder.encodeCommand(command));
+    }
+
+    @Test
+    public void testEngineResume() throws Exception {
+        command.setType(Command.TYPE_ENGINE_RESUME);
+        assertEquals("(S07,1)", encoder.encodeCommand(command));
+    }
+
+    @Test
+    public void testSetTimezone() throws Exception {
+        command.setType(Command.TYPE_SET_TIMEZONE);
+        command.set(Command.KEY_TIMEZONE, "GMT+4");
+        assertEquals("(S09,1,240)", encoder.encodeCommand(command));
+    }
+
+    @Test
+    public void testReboot() throws Exception {
+        command.setType(Command.TYPE_REBOOT_DEVICE);
+        assertEquals("(S17)", encoder.encodeCommand(command));
+    }
+}
diff --git a/src/test/java/org/traccar/protocol/KenjiProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/KenjiProtocolDecoderTest.java
new file mode 100755
index 000000000..5596913c9
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/KenjiProtocolDecoderTest.java
@@ -0,0 +1,18 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class KenjiProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        KenjiProtocolDecoder decoder = new KenjiProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                ">C800000,M005004,O0000,I0002,D124057,A,S3137.2783,W05830.2978,T000.0,H254.3,Y240116,G06*17"),
+                position("2016-01-24 12:40:57.000", true, -31.62131, -58.50496));
+    }    
+
+}
diff --git a/src/test/java/org/traccar/protocol/KhdProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/KhdProtocolDecoderTest.java
new file mode 100644
index 000000000..62b6070b6
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/KhdProtocolDecoderTest.java
@@ -0,0 +1,48 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class KhdProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        KhdProtocolDecoder decoder = new KhdProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "2929b1000605162935b80d"));
+
+        verifyPosition(decoder, binary(
+                "29298e006d1f29402d181117083846801193910365274500000000f80000227ffc3f00001e00500000000000060088000000220019ffc100000000000000000000000000000000007080002000000016ff893839323534303231303734313134323334333639000800233030302e30306e0d"));
+
+        verifyPosition(decoder, binary(
+                "2929a3002e1780c663170216203353003060811013839500000114f8000000ffff5000000a00000000000000060102003db70d"));
+
+        verifyPosition(decoder, binary(
+                "292980002805162935140108074727801129670365336900000103ffff000082fc0000001e78091b000000360d"));
+
+        verifyPosition(decoder, binary(
+                "29298100280A9F9538081228160131022394301140372500000330FF0000007FFC0F00001E000000000034290D"));
+
+        verifyPosition(decoder, binary(
+                "29298000280A81850A120310095750005281370061190800000232F848FFBBFFFF0000001E000000000000ED0D"));
+
+        verifyPosition(decoder, binary(
+                "29298E00280F80815A121218203116022318461140227000720262FB00077C7FBF5600001E3C3200000000850D"));
+
+        verifyPosition(decoder, binary(
+                "29298200230AA2CC391205030505220285947903109550008002078400000002000000000000750D"));
+
+        verifyPosition(decoder, binary(
+                "29298500081DD08C22120312174026026545710312541700000000F819C839FFFF1D00001E00500000003AF90D"));
+
+        verifyPosition(decoder, binary(
+                "292980002822836665140825142037045343770193879200000050ffff000082fc000004b0780b170000002a0d"));
+
+        verifyPosition(decoder, binary(
+                "292980002802425349120811032137022373011140211100000334FFFF000082FC0000001E780913000034DF0D"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/KhdProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/KhdProtocolEncoderTest.java
new file mode 100644
index 000000000..ab858041a
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/KhdProtocolEncoderTest.java
@@ -0,0 +1,22 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+public class KhdProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        KhdProtocolEncoder encoder = new KhdProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_ENGINE_STOP);
+
+        verifyCommand(encoder, command, binary("29293900065981972d5d0d"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/L100FrameDecoderTest.java b/src/test/java/org/traccar/protocol/L100FrameDecoderTest.java
new file mode 100644
index 000000000..5ffa3d8d1
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/L100FrameDecoderTest.java
@@ -0,0 +1,31 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class L100FrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        L100FrameDecoder decoder = new L100FrameDecoder();
+
+        verifyFrame(
+                binary("41544c2c4c2c3836383334353033383137313936332c4e2c3230313231382c3039333031362c412c3032352e3036373134342c4e2c3035352e3134343833332c452c3030302e302c4750532c333933392c3432342c30332c30303430352c303038383334"),
+                decoder.decode(null, null, binary("41544c2c4c2c3836383334353033383137313936332c4e2c3230313231382c3039333031362c412c3032352e3036373134342c4e2c3035352e3134343833332c452c3030302e302c4750532c333933392c3432342c30332c30303430352c30303838333440")));
+
+        verifyFrame(
+                binary("4c2c41544c2c3836363739353033303437373935322c30312c303033352c"),
+                decoder.decode(null, null, binary("4c2c41544c2c3836363739353033303437373935322c30312c303033352c2a28")));
+
+        verifyFrame(
+                binary("41544c3335363839353033373533333734352c244750524d432c3131313731392e3030302c412c323833382e303034352c4e2c30373731332e333730372c452c302e30302c2c3132303831302c2c2c412a3735242c2330313130303131313030313031302c4e2e432c4e2e432c4e2e432c31323334352e36372c33312e342c342e322c32312c4d43432c4d4e432c4c41432c43656c6c494441544c"),
+                decoder.decode(null, null, binary("200141544c3335363839353033373533333734352c244750524d432c3131313731392e3030302c412c323833382e303034352c4e2c30373731332e333730372c452c302e30302c2c3132303831302c2c2c412a3735242c2330313130303131313030313031302c4e2e432c4e2e432c4e2e432c31323334352e36372c33312e342c342e322c32312c4d43432c4d4e432c4c41432c43656c6c494441544c027a")));
+
+        verifyFrame(
+                binary("41544c3335363839353033373533333734352c244750524d432c3131313731392e3030302c412c323833382e303034352c4e2c30373731332e333730372c452c302e30302c2c3132303831302c2c2c412a3735244c4f432c436f6e6e61756768742043697263757320c2a0436f6e6e617567687420506c61636520c2a04e65772044656c686920c2a044656c6869c2a0496e6469612c2330313130303130313130313031302c322e332c33352e36372c38302c31323334352e36372c33312e342c342e322c32312c4d43432c4d4e432c4c41432c43656c6c494441544c"),
+                decoder.decode(null, null, binary("200341544c3335363839353033373533333734352c244750524d432c3131313731392e3030302c412c323833382e303034352c4e2c30373731332e333730372c452c302e30302c2c3132303831302c2c2c412a3735244c4f432c436f6e6e61756768742043697263757320c2a0436f6e6e617567687420506c61636520c2a04e65772044656c686920c2a044656c6869c2a0496e6469612c2330313130303130313130313031302c322e332c33352e36372c38302c31323334352e36372c33312e342c342e322c32312c4d43432c4d4e432c4c41432c43656c6c494441544c047a")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/L100ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/L100ProtocolDecoderTest.java
new file mode 100644
index 000000000..04f586f7a
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/L100ProtocolDecoderTest.java
@@ -0,0 +1,51 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class L100ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        L100ProtocolDecoder decoder = new L100ProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "ATL,NP,868004029750174,$GPRMC,062943,A,2533.6719,N,09154.3203,E,0,179,311218,,,*39,#01111011000000,0,0,0,934.82,27.13,4.0,25,405,755,15af,974b,0,0,0,ATL"));
+
+        verifyPosition(decoder, text(
+                "ATL,L,868345038171963,N,201218,093016,A,025.067144,N,055.144833,E,000.0,GPS,3939,424,03,00405,008834"));
+
+        verifyPosition(decoder, text(
+                "N,111116,090031,A,028.123456,N,077.123456,E,000.0,GPS,4180,404,11,00159,064753"));
+
+        verifyAttributes(decoder, text(
+                "L,ATLOBD,866795030475584,03,7429,143344,130918,CAN,0101:00076100,0103:0200,0104:3C,0105:84,010A:XX,010B:19,010C:0F98,010D:22,010E:68,010F:5A,0110:XXXX,0111:28,011C:20,011F:XXXX,0121:0000,0122:XXXX,012F:XX,0162:XX,0132:XXXX,0133:61,0143:00A8,0145:0F,0146:XX,0147:30,0148:XX,0149:31,014A:18,014B:XX,014C:92,0151:XX,0131:00BB,0144:8000,015E:XXXX,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,0902:XXXXXXXXXXXXXXX"));
+
+        verifyPosition(decoder, text(
+                "H,ATL,866795030478513,02,0981,054448,230318,A,28.633486;N,77.222595;E,0,154,1.14,4.2,18,404,4,88,ad7b,#1031,0,ATL,"));
+
+        verifyNull(decoder, text(
+                "L,ATL,866795030477952,01,0035,"));
+
+        verifyPosition(decoder, text(
+                "ATL861693039769518,$GPRMC,074930.000,A,2838.0112,N,07713.3602,E,0000,223.36,290518,,,A*7E,#01111011000100,0.012689,0,0,2.572415,0,4.015,22,404,4,88,3ad5,0,0.01,1.4_800F_VTS3D3_gen_peri_myn,,internet,00000000,ATL"));
+
+        verifyPosition(decoder, text(
+                "ATL867857039216564,$GPRMC,131101,A,2838.010010,N,7713.354980,E,0,0,240418,,,*09,#00011011000000,0,0,0,10.70,24.31,3.8,0,0,0,0,0ATL"));
+
+        verifyPosition(decoder, text(
+                "ATL867857039216564,$GPRMC,131033,A,2838.010010,N,7713.354980,E,0,51,240418,,,*3D,#00011011000000,0,0,0,10.70,24.31,3.8,20,404,4,88,cfaaATL"));
+
+        verifyPosition(decoder, text(
+                "ATL868004026997257,$GPRMC,095542,A,2838.0107,N,07713.3579,E,0,98,010617,,,*03,#01111011000000,0,0,0,0.01,45.94,4.0,25,404,4,88,3ad5ATL"));
+
+        verifyPosition(decoder, text(
+                "ATL861693035285253,$GPRMC,022040,A,2954.0481,N,07353.1694,E,0,150,280417,,,*36,#01111011000000,0,0,0,82.92,37.92,4.0,23,404,70,163,b178ATL"));
+
+        verifyPosition(decoder, text(
+                "ATL356895037533745,$GPRMC,111719.000,A,2838.0045,N,07713.3707,E,0.00,,120810,,,A*75,#01100111001010,N.C,N.C,N.C,12345.67,31.4,4.2,21,100,000,000001,00000ATL"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/LaipacProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/LaipacProtocolDecoderTest.java
new file mode 100644
index 000000000..31a0434bc
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/LaipacProtocolDecoderTest.java
@@ -0,0 +1,125 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class LaipacProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        LaipacProtocolDecoder decoder = new LaipacProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$AVRMC,80006405,212645,r,3013.9938,N,08133.3998,W,0.00,0.00,010317,a,4076,0,1,0,0,53170583,310260*78"));
+
+        verifyNull(decoder, text(
+                "$AVSYS,99999999,V1.50,SN0000103,32768*15"));
+        
+        verifyNull(decoder, text(
+                "$ECHK,99999999,0*35"));
+        
+        verifyNull(decoder, text(
+                "$AVSYS,MSG00002,14406,7046811160,64*1A"));
+
+        verifyNull(decoder, text(
+                "$EAVSYS,MSG00002,8931086013104404999,,Owner,0x52014406*76"));
+
+        verifyNull(decoder, text(
+                "$ECHK,MSG00002,0*5E"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,99999999,164339,A,4351.0542,N,07923.5445,W,0.29,78.66,180703,0,3.727,17,1,0,0*37"),
+                position("2003-07-18 16:43:39.000", true, 43.85090, -79.39241));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,99999999,164339,a,4351.0542,N,07923.5445,W,0.29,78.66,180703,0,3.727,17,1,0,0*17"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,99999999,164339,v,4351.0542,N,07923.5445,W,0.29,78.66,180703,0,3.727,17,1,0,0*00"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,99999999,164339,r,4351.0542,N,07923.5445,W,0.29,78.66,180703,0,3.727,17,1,0,0*04"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,99999999,164339,A,4351.0542,N,07923.5445,W,0.29,78.66,180703,S,3.727,17,1,0,0*54"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,99999999,164339,A,4351.0542,N,07923.5445,W,0.29,78.66,180703,T,3.727,17,1,0,0*53"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,99999999,164339,A,4351.0542,N,07923.5445,W,0.29,78.66,180703,3,3.727,17,1,0,0*34"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,99999999,164339,A,4351.0542,N,07923.5445,W,0.29,78.66,180703,X,3.727,17,1,0,0*5F"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,99999999,164339,A,4351.0542,N,07923.5445,W,0.29,78.66,180703,4,3.727,17,1,0,0*33"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,MSG00002,003016,v,0000.0000,N,00000.0000,E,0.00,0.00,200614,0,3804,167,1,0,0,0D7AB913,020408*23"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,MSG00002,003049,V,0000.0000,N,00000.0000,E,0.00,0.00,200614,H,3804,167,1,0,0,0D7AB913,020408*71"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,MSG00002,041942,V,0000.0000,N,00000.0000,E,0.00,0.00,200614,H,4115,167,1,0,0*0E"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,MSG00002,043703,V,0000.0000,N,00000.0000,E,0.00,0.00,200614,H,4115,167,1,0,0*07"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,MSG00002,043750,V,0000.0000,N,00000.0000,E,0.00,0.00,200614,H,4115,167,1,0,0*01"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,MSG00002,124022,V,0000.0000,N,00000.0000,E,0.00,0.00,240614,3,4076,167,1,0,0,0D7AB913,020408*0D"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,MSG00002,124058,A,5053.0447,N,00557.8549,E,0.45,65.06,240614,0,4037,167,1,0,0,0D7AB913,020408*26"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,MSG00002,124144,A,5053.0450,N,00557.8544,E,0.00,65.06,240614,3,4076,167,1,0,0,0D7AB913,020408*26"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,MSG00002,125142,R,5053.0442,N,00557.8694,E,1.21,40.90,240614,0,4037,167,1,0,0,0D7AB913,020408*33"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,MSG00002,125517,R,5053.0442,N,00557.8694,E,0.00,0.00,240614,H,4076,167,1,0,0,0D7AB913,020408*75"));
+        
+        verifyPosition(decoder, text(
+                "$AVRMC,MSG00002,043104,p,5114.4664,N,00534.3308,E,0.00,0.00,280614,0,4115,495,1,0,0,0D48C3DC,020408*52"));
+        
+        verifyPosition(decoder, text(
+                "$AVRMC,MSG00002,050601,P,5114.4751,N,00534.3175,E,0.00,0.00,280614,0,4115,495,1,0,0,0D48C3DC,020408*7D"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,96414215,170046,p,4310.7965,N,07652.0816,E,0.00,0.00,071016,0,4069,98,1,0,0*04"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,999999999999999,111602,r,5050.1262,N,00419.9660,E,0.00,0.00,120318,0,3843,95,1,0,0,3EE4A617,020610*47"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,358174067149865,143456,R,5050.1285,N,00420.0620,E,0.00,309.27,190318,0,3455,119,1,0,0,3EE4A617,020610*54"));
+
+        verifyPosition(decoder, text(
+                "$AVRMC,999999999999999,084514,r,5050.1314,N,00419.9719,E,0.68,306.39,120318,0,3882,84,1,0,0,3EE4A617,020610*4D"));
+
+        //Alarm button
+        verifyPosition(decoder, text(
+                "$AVRMC,358174067149865,142945,R,5050.1254,N,00420.0490,E,0.00,0.00,190318,3,3455,119,1,0,0,3EE4A617,020610*53"));
+
+        //G-Sensor
+        verifyPosition(decoder, text(
+                "$AVRMC,358174067149865,143407,R,5050.1254,N,00420.0490,E,0.00,0.00,190318,8,3455,119,1,0,0,3EE4A617,020610*52"));
+
+        //Powered off
+        verifyPosition(decoder, text(
+                "$AVRMC,358174067149865,143648,A,5050.1141,N,00420.0525,E,1.24,174.38,190318,H,3455,119,1,0,0,3EE4A617,020610*3E"));
+
+        //No network
+        verifyPosition(decoder, text(
+                "$AVRMC,358174067149865,143747,R,5050.1124,N,00420.0542,E,1.34,161.96,190318,a,3416,119,1,0,0*7D"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/M2cProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/M2cProtocolDecoderTest.java
new file mode 100644
index 000000000..65c9cc43b
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/M2cProtocolDecoderTest.java
@@ -0,0 +1,27 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class M2cProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        M2cProtocolDecoder decoder = new M2cProtocolDecoder(null);
+
+        verifyPositions(decoder, text(
+                "[#M2C,2020,P1.B1.H3.F9.R1,102,864547034433966,1,L,0,20,171221,062016,28.647552,77.192841,0,0,0.0,0,0,64,255,11983,0,0,0,0.0,0,0,0,404,4,1F6,4D77,31,0*7524\r\n",
+                "#M2C,2020,P1.B1.H3.F9.R1,102,864547034433966,2,L,0,20,171221,062019,28.647552,77.192841,0,0,0.0,0,0,64,255,11983,0,0,0,0.0,0,0,0,404,4,1F6,4D77,31,0*7528\r\n",
+                "#M2C,2020,P1.B1.H3.F9.R1,102,864547034433966,3,L,0,20,171221,062024,28.647552,77.192841,0,0,0.0,0,0,64,255,16292,0,0,0,0.0,0,0,0,404,4,1F6,4D77,31,0*7523\r\n"));
+
+        verifyPositions(decoder, text(
+                "[#M2C,2020,P1.B1.H1.F1.R1,101,862462038980016,2,L,1,100,170704,074933,28.647556,77.192940,900,194,0.0,0,0,0,255,11942,0,0,0,0,0,0,0,0,30068,5051,0,0,1*8159\r\n"));
+
+        verifyPositions(decoder, text(
+                "[#M2C,2020,P1.B1.H1.F1.R1,101,862462038980016,7,L,0,31,170704,075905,28.647615,77.192970,300,260,0.0,6,7,3,255,11967,0,12,0,0,0,0,0,0,19500,5051,0,27,1*8234\r\n",
+                "#M2C,2020,P1.B1.H1.F1.R1,101,862462038980016,8,L,0,33,170704,075905,28.647615,77.192970,300,260,0.0,6,7,0,255,11942,0,12,0,0,0,0,0,0,20300,5051,0,27,1*8217\r\n"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/M2mProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/M2mProtocolDecoderTest.java
new file mode 100644
index 000000000..1c45c976b
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/M2mProtocolDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class M2mProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        M2mProtocolDecoder decoder = new M2mProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "235A3C2A2624215C287D70212A21254C7C6421220B0B0B"));
+
+        verifyPosition(decoder, binary(
+                "A6E12C2AAADA4628326B2059576E30202A2FE85D20200B"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/MaestroProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/MaestroProtocolDecoderTest.java
new file mode 100644
index 000000000..c7a7624c0
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/MaestroProtocolDecoderTest.java
@@ -0,0 +1,30 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class MaestroProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        MaestroProtocolDecoder decoder = new MaestroProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "@353893040202807,705,UPV-02,1,13.2,17,0,0,16/09/11,11:42:49,0.352705,32.647918,1210.5,0.000000,35.33,11,0.8,0.000,0!\0"));
+
+        verifyPosition(decoder, text(
+                "@353893040202807,705,UPV-02,1,13.4,18,0,0,16/09/11,11:43:30,0.352808,32.647990,1211.0,0.000000,80.96,11,0.8,0.000,0!\0"));
+
+        verifyPosition(decoder, text(
+                "@353893040202807,601,UPV-02,0,13.4,10,0,0,16/11/04,17:21:14,0.352793,32.647927,0,0,0,0,99,0.000,0!\0"));
+
+        verifyPosition(decoder, text(
+                "@123451234512345,531,M2MGTW,1,12.5,30,0,0,11/10/10,09:09:09,22.222222,114.141414,45.6,0.0,160.0,8,1,20!"));
+
+        verifyPosition(decoder, text(
+                "@123451234512345,702,M2MGTW,1,14.7,30,0,1,11/10/10,09:09:09,22.222222,114.141414,45.6,25.12,160.0,8,1,25!"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/ManPowerProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/ManPowerProtocolDecoderTest.java
new file mode 100644
index 000000000..1d6f80ae3
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/ManPowerProtocolDecoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class ManPowerProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        ManPowerProtocolDecoder decoder = new ManPowerProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "simei:352581250259539,,,tracker,51,24,1.73,130426023608,A,3201.5462,N,03452.2975,E,0.01,28B9,1DED,425,01,1x0x0*0x1*60x+2,en-us,"),
+                position("2013-04-26 02:36:08.000", true, 32.02577, 34.87163));
+
+        verifyPosition(decoder, text(
+                "simei:352581250259539,,,weather,99,20,0.00,130426032310,V,3201.5517,N,03452.3064,E,1.24,28B9,25A1,425,01,1x0x0*0x1*60x+2,en-us,"));
+        
+        verifyPosition(decoder, text(
+                "simei:352581250259539,,,SMS,54,19,90.41,130426172308,V,3201.5523,N,03452.2705,E,0.14,28B9,01A5,425,01,1x0x0*0x1*60x+2,en-us,"));
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/MegastekFrameDecoderTest.java b/src/test/java/org/traccar/protocol/MegastekFrameDecoderTest.java
new file mode 100644
index 000000000..68606a98a
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/MegastekFrameDecoderTest.java
@@ -0,0 +1,27 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class MegastekFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        MegastekFrameDecoder decoder = new MegastekFrameDecoder();
+
+        verifyFrame(
+                binary("30313337244d47563030322c3335343535303035303239323636392c4756543930302c522c3134313231352c3033313830342c412c2c532c2c452c30302c30332c30302c332e36372c302e3030302c302e30302c3131372e312c302e302c3531302c31302c2c2c2c303030302c303030302c32322c31322c302c202c202c2c312d312c39382c5057204f4e3b21"),
+                decoder.decode(null, null, binary("30313337244d47563030322c3335343535303035303239323636392c4756543930302c522c3134313231352c3033313830342c412c2c532c2c452c30302c30332c30302c332e36372c302e3030302c302e30302c3131372e312c302e302c3531302c31302c2c2c2c303030302c303030302c32322c31322c302c202c202c2c312d312c39382c5057204f4e3b21")));
+
+        verifyFrame(
+                binary("244d47563030322c3031333737373030373533363433342c2c522c3031303131342c3030303035372c562c303030302e303030302c4e2c30303030302e303030302c452c30302c30302c30302c39392e392c302e3030302c302e30302c302e302c38302e3236332c3531302c38392c323334322c303330422c2c303030302c303030302c3230302c39362c302c202c202c2c2c2c54696d65723b21"),
+                decoder.decode(null, null, binary("244d47563030322c3031333737373030373533363433342c2c522c3031303131342c3030303035372c562c303030302e303030302c4e2c30303030302e303030302c452c30302c30302c30302c39392e392c302e3030302c302e30302c302e302c38302e3236332c3531302c38392c323334322c303330422c2c303030302c303030302c3230302c39362c302c202c202c2c2c2c54696d65723b210d0a")));
+
+        verifyFrame(
+                binary("53545832363034373520202020202020202020024f244750524d432c3133313131302e30302c562c2c2c2c2c2c2c3036303931332c2c2c4e2a37362c3232322c30312c383135412c443435352c31312c39372c303030302c303030312c302c54696d65723b3735"),
+                decoder.decode(null, null, binary("53545832363034373520202020202020202020024f244750524d432c3133313131302e30302c562c2c2c2c2c2c2c3036303931332c2c2c4e2a37362c3232322c30312c383135412c443435352c31312c39372c303030302c303030312c302c54696d65723b37350d0a")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/MegastekProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/MegastekProtocolDecoderTest.java
new file mode 100644
index 000000000..1bf3dbd25
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/MegastekProtocolDecoderTest.java
@@ -0,0 +1,100 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class MegastekProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        MegastekProtocolDecoder decoder = new MegastekProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "0132$MGV002,869152024261561,,S,310818,133945,V,3814.35442,N,02144.50662,E,00,00,00,99.9,,,44.2,,202,10,,,13,0,0,0,0,90,,,,11,100,Timer;!"));
+
+        verifyPosition(decoder, text(
+                "0151$MGV002,869152024261561,ID,S,070918,155544,V,3814.35419,N,02144.52113,E,00,00,00,99.9,0.062,,12.3,,202,01,0898,D1BE,8,34,1055,0,0,600,,,,11,010,Timer;!"));
+
+        verifyPosition(decoder, text(
+                "0174$MGV002,014682001957744,014682001957744,R,260318,042537,A,3853.77301,N,07728.66673,W,00,09,00,1.06,0.147,329.51,123.3,,310,26,B46C,5E69375,5,0000,0000,0,,,,,,10,019,Timer,,;!"));
+
+        verifyNull(decoder, text(
+                "0112$MGV002,,GVT900-3,S,010114,000003,,,,,,00,00,00,,0.000,0.00,,0.0,,,,,,0000,0000,14,10,0, , ,,1-0,0,Low Ext Vol;!"));
+
+        verifyPosition(decoder, text(
+                "0170$MGV002,354550056642321,GVT900-3,S,011017,090208,A,1635.8484,N,10446.6095,E,00,09,00,0.91,16.980,257.73,177.6,0.0,457,01,0741,00C0,21,0000,0000,20,10,0, , ,,1-1,54,Dist;!"));
+
+        verifyNull(decoder, text(
+                "0140$MGV002,354550056642321,GVT900-3,S,300917,071731,V,,,,,00,00,00,99.9,0.000,0.00,,0.0,457,01,0741,00CD,,0000,0000,20,10,0, , ,,1-1,94,PW ON;!"));
+
+        verifyPosition(decoder, text(
+                "$MGV002,869152024446923,,S,290816,200627,V,5056.21059,N,00439.25034,E,00,00,00,99.9,,,-25.1,,206,01,0BBB,4418,28,,,,,,,,,01,093,Timer;"));
+
+        verifyPosition(decoder, text(
+                "$MGV002,869152024446923,869152024446923,S,240816,151631,A,5053.83335,N,00424.05702,E,00,10,00,0.88,2.645,76.09,22.7,,206,01,07D1,6600,28,,,,,,,,,01,100,Timer;!"));
+
+        verifyPosition(decoder, text(
+                "STX,013950007137061,$GPRMC,191959.000,A,5203.09602,N,00830.77057,E,5.73,255.27,240716,,,A*62,L,Belt Up,imei:013950007137061,0/5,,Battery=52%,,1,262,03,0084,B20E;FD"));
+
+        verifyPosition(decoder, text(
+                "STX,865067021328417,$GPRMC,064721.000,A,4241.2793,N,02321.9762,E,6.74,346.90,300316,,,1*CA,F,Nil-Alarms,imei:865067021328417,9,559.8,Battery=82%,0,284,03,047E,2B5F;99"));
+
+        verifyNull(decoder, text(
+                "0147$MGV002,354550050292669,GVT900,S,141215,031804,A,,S,,E,00,04,00,5.17,0.000,193.05,117.1,0.0,510,10,041B,0A5E,,0000,0000,22,12,0, , ,,1-1,98,Timer;!"));
+
+        verifyNull(decoder, text(
+                "0137$MGV002,354550050292669,GVT900,R,141215,031804,A,,S,,E,00,03,00,3.67,0.000,0.00,117.1,0.0,510,10,,,,0000,0000,22,12,0, , ,,1-1,98,PW ON;!"));
+
+        verifyPosition(decoder, text(
+                "0125$MGV002,860719020193193,DeviceName,R,240214,104742,A,2238.20471,N,11401.97967,E,00,03,00,1.20,0.462,356.23,137.9,1.5,460,07,262C,0F54,25,0000,0000,0,0,0,28.5,28.3,,,100,Timer;"));
+
+        verifyPosition(decoder, text(
+                "$MGV002,860719020193193,DeviceName,R,240214,104742,A,2238.20471,N,11401.97967,E,00,03,00,1.20,0.462,356.23,137.9,1.5,460,07,262C,0F54,25,0000,0000,0,0,0,28.5,28.3,,,100,Timer;!"),
+                position("2014-02-24 10:47:42.000", true, 22.63675, 114.03299));
+
+        verifyPosition(decoder, text(
+                "STX2010101801      j$GPRMC,101053.000,A,2232.7607,N,11404.7669,E,0.00,,231110,,,A*7F,460,00,2795,0E6A,14,94,1000,0000,91,Timer;1D"));
+
+        verifyPosition(decoder, text(
+                "STX,861001005215757,$GPRMC,180118.000,A,4241.330116,N,2321.931251,E,0.00,182.19,130915,,E,A,F,Nil-Alarms,imei:861001005215757,8,577.0,Battery=38%,0,284,03,03E8,3139;7A"));
+
+        verifyPosition(decoder, text(
+                "STX,865067020439090,$GPRMC,171013.000,A,5919.1411,N,01804.1681,E,0.000,294.41,140815,,,A"));
+
+        verifyPosition(decoder, text(
+                "$MGV002,013777007536434,,R,010114,000057,V,0000.0000,N,00000.0000,E,00,00,00,99.9,0.000,0.00,0.0,80.263,510,89,2342,030B,,0000,0000,200,96,0, , ,,,,Timer;!"));
+
+        verifyPosition(decoder, text(
+                "STX,GerAL22,$GPRMC,174752.000,A,3637.060059,S,6416.2354,W,0.00,0.00,030812,,,A*55,F,,imei:861785000249353,05,180.6,Battery=100%,,1,722,310,0FA6,39D0;8F"));
+
+        verifyPosition(decoder, text(
+                "STX,GerAL22,$GPRMC,000051.000,A,3637.079590,S,6416.2148,W,1.72,332.98,010109,,,A*52,L,,imei:861785000249353,03,275.3,Battery=68%,,1,722,07,0515,1413;41"));
+        
+        verifyPosition(decoder, text(
+                "STX,,$GPRMC,001339.000,A,4710.85395,N,02733.58209,E,1.65,238.00,010109,,,A*67,L,Help,imei:013227009737796,0/8,137.1,Battery=100%,,0,226,01,2B9B,BBBF;8D"));
+
+        verifyPosition(decoder, text(
+                "STX,102110830074542,$GPRMC,114229.000,A,2238.2024,N,11401.9619,E,0.00,0.00,310811,,,A*64,F,LowBattery,imei:012207005553885,03,113.1,Battery=24%,,1,460,01,2531,647E;57"));
+
+        verifyPosition(decoder, text(
+                "STX863070014949464   $GPRMC,215942.290,A,4200.1831,N,02128.5904,E,003.1,079.8,090813,,,A*6E,294,02,0064,0F3D,18,17,0000,000000,0000,0.00,0.02,0.00,Store;D8"));
+
+        verifyPosition(decoder, text(
+                "STX123456            $GPRMC,063709.000,A,2238.1998,N,11401.9670,E,0.00,,250313,,,A*7F,460,01,2531,647E,11,87,1000,001001,0000,0.00,0.02,0.00,Timer;4A"));
+
+        verifyPosition(decoder, text(
+                "STX260475            $GPRMC,104032.001,A,4022.1119,N,01811.4081,E,000.0,000.0,060913,,,A*67,222,01,815A,D455,11,99,0000,0001,0,Timer;"));
+
+        verifyPosition(decoder, text(
+                "LOGSTX,123456789012345,$GPRMC,225419.000,A,3841.82201,N,09494.73357,W,12.46,135.33,270914,,,A*47,F,,imei:123456789012345,0/6,,Battery=100%,,0,,,5856,78A3;24"));
+
+        verifyPosition(decoder, text(
+                "LOGSTX,123456789012345,$GPRMC,230551.000,A,3841.81956,N,09494.45403,W,0.00,0.00,270914,,,A*7C,L,,imei:123456789012345,0/7,269.7,Battery=100%,,0,,,5856,78A3;83"));
+
+        verifyPosition(decoder, text(
+                "LOGSTX,123456789012345,$GPRMC,230739.000,A,3841.81895,N,09494.12409,W,0.00,0.00,270914,,,A*70,L,,imei:123456789012345,0/7,269.7,Battery=100%,,0,,,5856,78A3;78"));
+        
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/MeiligaoFrameDecoderTest.java b/src/test/java/org/traccar/protocol/MeiligaoFrameDecoderTest.java
new file mode 100644
index 000000000..2d09c626b
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/MeiligaoFrameDecoderTest.java
@@ -0,0 +1,29 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+public class MeiligaoFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        MeiligaoFrameDecoder decoder = new MeiligaoFrameDecoder();
+
+        assertNull(
+                decoder.decode(null, null, binary("00")));
+
+        assertEquals(
+                binary("2424007b8621700151517899553233323835372e3030302c562c333632372e313835342c4e2c30313034352e323130392c452c302e30302c372c3239303131332c2c2a31347c302e307c347c303030307c303030382c303030357c303235443030303230303541374432327c30367c303030314530353527f40d0a"),
+                decoder.decode(null, null, binary("2424007B8621700151517899553233323835372E3030302C562C333632372E313835342C4E2C30313034352E323130392C452C302E30302C372C3239303131332C2C2A31347C302E307C347C303030307C303030382C303030357C303235443030303230303541374432327C30367C303030314530353527F40D0A")));
+
+        assertEquals(
+                binary("2424007b8621700151517899553233323835372e3030302c562c333632372e313835342c4e2c30313034352e323130392c452c302e30302c372c3239303131332c2c2a31347c302e307c347c303030307c303030382c303030357c303235443030303230303541374432327c30367c303030314530353527f40d0a"),
+                decoder.decode(null, null, binary("002424007B8621700151517899553233323835372E3030302C562C333632372E313835342C4E2C30313034352E323130392C452C302E30302C372C3239303131332C2C2A31347C302E307C347C303030307C303030382C303030357C303235443030303230303541374432327C30367C303030314530353527F40D0A")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/MeiligaoProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/MeiligaoProtocolDecoderTest.java
new file mode 100644
index 000000000..da5a81144
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/MeiligaoProtocolDecoderTest.java
@@ -0,0 +1,137 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class MeiligaoProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        MeiligaoProtocolDecoder decoder = new MeiligaoProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "24240012254748594772ff080002ffff0d0a"));
+
+        verifyNull(decoder, binary(
+                "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"));
+
+        verifyPosition(decoder, binary(
+                "242400716578902405843299553136323533332e3937382c412c343632332e313137392c4e2c30373932342e323437312c572c303030302c3030302c3139313231372c2c2a31437c31312e357c3139347c303030307c313139322c303030307c3835383030307c30303331343809540d0a"));
+
+        verifyPosition(decoder, binary(
+                "242400716578902405843299553136323533332e3937382c412c343632332e313137392c4e2c30373932342e323437312c572c303030302c3030302c3139313231372c2c2a31437c31312e357c3139347c303030307c313139322c303030307c3835383030307c30303331343809540d0a"));
+
+        verifyPosition(decoder, binary(
+                "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"));
+
+        verifyPositions(decoder, binary(
+                "2424006661172036237118668801003039333630342e3030302c562c303330332e333231352c4e2c31303134372e313530302c452c302e30302c2c3235313031377c302e307c302e307c303030307c303030302c303030307c30303030303230343259ca0d0a"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+        verifyPosition(decoder, binary(
+                "2424007f1092ffffffffff9999523232303534392e3030302c412c333533372e313231372c4e2c30313130302e303633332c452c362e34382c3139332c3238303631372c2c2a30357c302e387c32347c323030307c303030432c303030417c303235443030303230303833354437427c31357c3037303636424142f7310d0a"));
+
+        verifyAttributes(decoder, binary(
+                "242400561001ffffffffff99553030303030302e3030302c562c303030302e303030302c532c30303030302e303030302c572c302e30302c302e30302c3232303839392c2c2c412a37457c7c307c3030303059ae0d0a0000"));
+
+        verifyPosition(decoder, binary(
+                "242400706573402852404799553130313932372e3030302c412c313732362e38323739332c4e2c30373832382e31393637312c452c312e382c362e342c3137313131362c2c2a32427c312e36387c3534342e327c313030307c303030302c303030307c3030303032383638373a1a0d0a"));
+
+        verifyPosition(decoder, binary(
+                "2424007d0000000000000099553231303333302e3030302c562c343533342e333832342c532c30373230332e303630302c572c302e30302c302c3231313031362c2c2a31327c302e307c3332397c323030307c303030452c303030437c303244413030303145413634393541417c31307c30303030303030306e540d0a"));
+
+        verifyAttributes(decoder, binary(
+                "4040005066104020094432990131302E312C302C3135362C302E30302C31392E36312C2D33342C33342E32362C32312E38332C372E39312C313033332C322E36392C362E35352C302C302C309DBF0D0A"));
+        
+        verifyAttributes(decoder, binary(
+                "242400736610402421174399553130353033342e3937382c412c333933352e333638392c4e2c30303233382e313638342c452c303034382c3034322c3038313231362c2c2a31437c31312e357c3139347c313030317c303341362c303030307c30303130343030307c3030303030303cd00d0a2424004e66104024211743990131342e312c323638372c39302c32312e35372c342e37312c38352c372e31302c382e31362c342e32372c3130342c302e33342c392e33342c302c312c30b7160d0a2424003266104024211743990232352c322e34302c302e37392c32322c34332c3131392c333735362c37352c3132e4c90d0a"));
+
+        verifyPosition(decoder, binary(
+                "242400746251103044ffff99553033353033392e3939392c412c323832332e373632312c4e2c31303635322e303730342c572c3030302e302c3030302e302c3136303631362c2c2c412a37357c302e397c323038332e327c303030307c303030302c303030307c31303034333736333265780d0a"));
+
+        verifyPosition(decoder, binary(
+                "24240072190820157fffff99553039343335342e3030302c412c313930372e303631392c4e2c30373235312e333235312c452c3031302e312c3138382e352c3234303231362c2c2c412a36427c302e387c36352e327c303830307c303030302c303030307c303336343838373532c73f0d0a"));
+
+        verifyPosition(decoder, binary(
+                "242400680790209818ffff99553038333235382e3030302c412c303131352e393338302c532c30333634382e313430392c452c302e30302c3331352e35352c3132303131367c302e37347c313930322e337c303430307c303030302c303030307c302e30f41b0d0a"));
+
+        verifyNull(decoder, binary(
+                "24240011671440258855405000b24d0d0a"));
+
+        verifyPosition(decoder, binary(
+                "242400706796502079108999553131333131382e3030302c412c313033372e393637382c4e2c30363132312e353637392c572c302e35342c322e34322c3330303931352c2c2c412a37307c302e37377c392e397c303030307c303030302c303161327c3030313138373132374cae0d0a"),
+                position("2015-09-30 11:31:18.000", true, 10.63280, -61.35947));
+
+        verifyPosition(decoder, binary(
+                "24240074630700194707719966009E1F7F00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000007C3132303334302C3238303630362C323430302E303030302C4E2C31323130302E303030302C458F7E0D0A"),
+                position("2006-06-28 12:03:40.000", true, 24.00000, 121.00000));
+
+        verifyPosition(decoder, binary(
+                "24240076220720151fffff99660012b3ab00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000007c3135303634382c3233303731352c313931352e37323835362c4e2c30373235322e35333034342c456dd00d0a"));
+
+        verifyNull(decoder, binary(
+                "24240000123456FFFFFFFF50008B9B0D0A"));
+
+        verifyPosition(decoder, binary(
+                "242400722015032700004299553134313131352e3030302c412c353031312e343335342c4e2c30303834332e373039322c452c3030302e302c3034342e362c3134303431352c2c2c412a36437c322e317c39392e347c303030307c303030302c303030307c3030303032343730350e480d0a"));
+        
+        verifyPosition(decoder, binary(
+                "2424006e241120141fffff99553039333931302e30302c412c313931342e37373736352c4e2c30373235302e36383037322c452c302e3035312c2c3230313231342c2c2c442a37357c302e38327c322e387c303030307c303030302c303030307c3031303833373433311d170d0a"));
+
+        verifyPosition(decoder, binary(
+                "24240000123456FFFFFFFF99553033353634342E3030302C412C323233322E363038332C4E2C31313430342E383133372C452C302E30302C2C3031303830392C2C2A31437C31312E357C3139347C303030307C303030302C3030303069620D0A"));
+
+        verifyPosition(decoder, binary(
+                "242400003358019703581F99553133343335312E3030302C412C303932352E353032352C4E2C30363931342E383130372C572C302E30302C32332C3330313031322C2C2A32437C302E387C3138367C323030307C303132362C303046467C303244453030303244384344423431357C30367C303046443642373995820D0A"));
+
+        verifyPosition(decoder, binary(
+                "242400001691000484124F99553134303630332E3030302C412C303933342E323535342C4E2C30363931332E303936362C572C302E30302C2C3330313031322C2C2A30327C302E387C3230377C30303030FA420D0A"));
+
+        verifyPosition(decoder, binary(
+                "2424000045124220306FFF9999143135353432322E3030302C562C323233302E373632332C4E2C31313430332E343231382C452C302E30302C302C3036303231312C2C2A31417C302E307C32367C303030307C303030302C303030307C303030303030303030303030303030307C36337C3030303030303030BAC10D0A"));
+
+        verifyPosition(decoder, binary(
+                "242400008621700142458F9999503139323935382E3030302C412C333632372E313639392C4E2C30313034332E353632372C452C302E30302C3233392C3039313231322C2C2A30467C312E307C377C303030307C303141392C303139377C303235443030303230303541383639467C31327C3030303333424233E2480D0A"));
+
+        verifyPosition(decoder, binary(
+                "24240000123456789FFFFF99553032303630302E3933302C412C323330392E323035312C4E2C31313331382E383434392C452C302E30302C302E30302C3039303731302C2C2C412A36417C322E367C39362E377C303030307C303030302C334646467C303030303030303030C4520D0A"));
+        
+        verifyPosition(decoder, binary(
+                "242400005977203744058499553032303131372E3030302C412C343131372E393231322C4E2C30383133302E323039362C572C302E30302C3330332E38352C3236303231337C312E367C30307C303030307C303030302C3030303071CD0D0A"));
+
+        verifyPosition(decoder, binary(
+                "242400003511111111111199553133343734332e3030332c412c303634382e393836362c532c31303730372e353739352c452c3030302e302c3030302e302c323630333133f3150d0a"));
+
+        verifyPosition(decoder, binary(
+                "242400000091800369764199553038353133302e3030302c412c333035332e313634352c4e2c30373535352e373437362c452c302e30302c32372c3136303431332c2c2a33467c302e387c3234357c323030307c303346372c303030302c303030302c303031422c303030302c303030302c303030302c303030307c303139343030303230314343363237437c31417c3031313630383439e6a70d0a"));
+        
+        verifyPosition(decoder, binary(
+                "2424000026016100901fff99553136353835332c412c343130392e36303231322c4e2c3833382e35393131392c572c332e3838332c31322e30302c3034303731332c2c2a34467c322e357c3131307c000600007c0000010f7c303242302c3042333697740d0a"));
+
+        verifyNull(decoder, binary(
+                "2424000067622010053562aa0000010001ae4f00000007800000003039353135362e3030302c412c323632332e383936362c4e2c30353030352e303638302c452c32342e352c3234312e302c323231303133599c0d0a"));
+
+        verifyPosition(decoder, binary(
+                "242400001007ffffffffff99553136323330392e3035342c562c303933312e393136332c4e2c30363931312e383233332c572c2c2c3235313131332c2c2c4e2a36437c7c3135387c303030309cc60d0a"));
+
+        verifyAttributes(decoder, binary(
+                "242400003563070435652099553035323034322e3030302c412c343435382e333536352c4e2c30343130342e343831332c452c302e30302c302e30302c3139303131342c2c2a39437c302e3730303030307c2d3835393131373337367c303130307c307c7c7c4f2a0d0a"));
+        
+        verifyPosition(decoder, binary(
+                "2424005035784251ffffff99553030303033362e3938312c562c303933312e333437312c4e2c30363931312e383431322c572c2c2c3238303131342c2c2c4e2a36357c7c3136387c323030305e420d0a"));
+
+        verifyPosition(decoder, binary(
+                "2424007811223344ffffff99553031303735372e3030302c412c323935392e313337342c4e2c30393534302e333238342c572c3030302e302c3038382e372c3234303631342c2c2c412a37397c312e347c33352e317c303030307c303030312c303030307c3030303030333732337c3030303030e39f0d0a"));
+
+        verifyPosition(decoder, binary(
+                "2424007f3568960306760199553131303932342e3030302c412c343533342e323538352c4e2c30313933382e363531342c452c302e30302c2c3237303731342c2c2c412a37317c312e377c3130307c383030307c303737422c303030302c303030302c303030302c303030302c303030302c303030302c303030305dfc0d0a"));
+        
+        verifyPosition(decoder, binary(
+                "2424007f2015603256ffff99553230303230392e30302c412c313734342e36393434382c4e2c30383331392e30353537302c452c31302e3236322c3234382e35352c3236303631352c2c2c442a35437c302e39397c33312e397c303830317c303030302c303030637c3030303933303131367c3030376165313035d5550d0a"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/MeiligaoProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/MeiligaoProtocolEncoderTest.java
new file mode 100644
index 000000000..ee4a869f9
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/MeiligaoProtocolEncoderTest.java
@@ -0,0 +1,41 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+public class MeiligaoProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        MeiligaoProtocolEncoder encoder = new MeiligaoProtocolEncoder();
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_POSITION_SINGLE);
+
+        verifyCommand(encoder, command, binary("404000111234567890123441016cf70d0a"));
+
+        command.setType(Command.TYPE_POSITION_PERIODIC);
+        command.set(Command.KEY_FREQUENCY, 100);
+
+        verifyCommand(encoder, command, binary("40400013123456789012344102000a2f4f0d0a"));
+
+        command.setType(Command.TYPE_SET_TIMEZONE);
+        command.set(Command.KEY_TIMEZONE, "GMT+8");
+
+        verifyCommand(encoder, command, binary("4040001412345678901234413234383030ad0d0a"));
+
+        command.setType(Command.TYPE_REBOOT_DEVICE);
+
+        verifyCommand(encoder, command, binary("40400011123456789012344902d53d0d0a"));
+
+        command.setType(Command.TYPE_ALARM_GEOFENCE);
+        command.set(Command.KEY_RADIUS, 1000);
+
+        verifyCommand(encoder, command, binary("4040001312345678901234410603e87bb00d0a"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/MeitrackFrameDecoderTest.java b/src/test/java/org/traccar/protocol/MeitrackFrameDecoderTest.java
new file mode 100644
index 000000000..53749816e
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/MeitrackFrameDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assert.assertEquals;
+
+public class MeitrackFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        MeitrackFrameDecoder decoder = new MeitrackFrameDecoder();
+
+        assertEquals(
+                binary("24244e3132372c3836333037313031333830333036362c4141412c33352c2d312e3330323638302c33362e3835323133352c3135303430393231313032362c412c392c302c302e312c302c352c313635332c343039362c33323634382c3633397c30327c313030347c3930432c303030302c307c307c307c3346467c3330302c2a37430d0a"),
+                decoder.decode(null, null, binary("24244e3132372c3836333037313031333830333036362c4141412c33352c2d312e3330323638302c33362e3835323133352c3135303430393231313032362c412c392c302c302e312c302c352c313635332c343039362c33323634382c3633397c30327c313030347c3930432c303030302c307c307c307c3346467c3330302c2a37430d0a")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/MeitrackProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/MeitrackProtocolDecoderTest.java
new file mode 100644
index 000000000..3e05d5243
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/MeitrackProtocolDecoderTest.java
@@ -0,0 +1,110 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class MeitrackProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        MeitrackProtocolDecoder decoder = new MeitrackProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "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"));
+
+        verifyPositions(decoder, binary(
+                "24246b3131342c3836353738393032343134303439352c4343452c0000000001005000130006011f05010607071415001b00060800000949010a0c000b9b0119a1011afe010602e934ce0203fc9aeb0004309f13220cafc503000d97741e001c01000000010e0ce8000300092f2e060000b7ff2a33330d0a"));
+
+        verifyPosition(decoder, buffer(
+                "$$^182,864507031245110,AAA,109,13.844553,100.644360,171227173141,A,11,19,0,359,0.8,8,15075,934591,520|4|0643|07D20555,8400,0000|0000|0000|018D|04CB,,,108,0000,,6,0,,,,,10|171227173100*7C"));
+
+        verifyPosition(decoder, buffer(
+                "$$S214,864507031219974,AAA,109,13.844643,100.644395,171207021520,A,10,28,0,31,0.8,6,390,421327,520|0|0016|000F2DB0,8400,0000|0000|0000|018D|04C6,,,108,0000,,6,0,,,,,11|171207091500|171207091500|78|3500|000000|000003*12"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+        verifyPosition(decoder, buffer(
+                "$$V177,863835026871173,AAA,35,34.516428,10.470160,170915154043,A,9,12,68,74,0.9,9,1988259,525882,605|2|008C|0007B5A6,0200,0003|0000|0000|01A6|0571,00000001,,3,0000,06FB2E,360,511*74"));
+
+        verifyPosition(decoder, buffer(
+                "$$V177,863835026871173,AAA,35,34.516428,10.470160,170915154043,A,9,12,68,74,0.9,9,1988259,525882,605|2|008C|0007B5A6,0200,0003|0000|0000|01A6|0571,00000001,,3,0000,010A92,360,511*74"));
+
+        verifyPosition(decoder, buffer(
+                "$$B136,011691002364761,AAA,29,47.055220,28.893193,170914144240,V,0,7,0,0,0,132,129754946,129793197,259|2|02F8|413F,0000,000D|000C||028C|,*9E"));
+
+        verifyNotNull(decoder, buffer(
+                "$$F153,863835026880190,AAA,29,25.313160,55.422473,170628150902,V,0,0,0,0,0.0,0,6553,6697,0|0|0000|00000000,0000,0002|0000|0000|018B|0000,,,3,0000,,110,386*22"));
+
+        verifyPosition(decoder, buffer(
+                "$$T143,869013024733944,AAA,1,18.459575,-69.947161,170220142912,A,5,15,10,300,1.6,115,3989,187884,370|2|5337|2B2C,0100,0000|0000|0000|0964|0B04,,*C2"));
+
+        verifyPosition(decoder, buffer(
+                "$$K157,866771027160687,AAA,3,37.040231,10.042391,160412151656,A,10,11,0,48,0.8,21,1035518,774980,605|2|0010|307B,0400,0000|0000|0000|0A47|03E3,,,1,0000,001206*2C"));
+
+        verifyNull(decoder, buffer(
+                "$$D28,353358017784062,D03,OK*F3"));
+
+        verifyPosition(decoder, buffer(
+                "$$A158,79007001520234,AAA,35,40.996370,-8.575065,150730184834,A,8,24,0,1,1.3,173,32573389,31405012,268|3|2BC0|250B,2000,|||0A2D|0000,00000001,,50,,,,,,,,,,,,,*4A"),
+                position("2015-07-30 18:48:34.000", true, 40.99637, -8.57507));
+
+        verifyPosition(decoder, buffer(
+                "$$G145,862106024274815,AAA,35,-1.287125,36.906061,150530054639,A,10,13,12,67,0.8,1621,38359791,42330881,639|2|FB2|2F3,0000,3|0|0|A58|432,,,1,0009,*26"));
+
+        verifyPosition(decoder, buffer(
+                "$$I152,013949004569813,AAA,37,54.739468,25.273648,150208173414,A,5,24,0,73,1.5,165,74,3381,246|1|0065|118A,0000,0003|0003|0000|08D4|0002,006380DF,,1,0008*7C"));
+
+        verifyPosition(decoder, buffer(
+                "$$E141,863071013799553,AAA,35,-1.264521,36.801128,150307132846,A,11,20,0.2,0,5,1767,84045888,36496633,639|02|100E|844,1234,0018|||025D|00CB,*17"));
+
+        verifyPosition(decoder, buffer(
+                "$$m140,013777008931857,AAA,1,54.739580,25.273263,141120144603,V,0,25,0,6,50.0,159,19825,13940,246|1|0065|118A,0100,0000|0000|0000|092A|0001,,*1C"));
+        
+        verifyPosition(decoder, buffer(
+                "$$X138,862170010187175,AAA,35,-29.960365,-51.655455,130507201625,A,8,9,0,107,0.9,7,169322,126582,724|6|0547|132B,0000,0009|000A||0278|0000,*BE"));
+        
+        verifyPosition(decoder, buffer(
+                "$$X138,862170010187175,AAA,35,-29.960365,-51.655455,130507201625,A,8,9,0,107,0.9,-7,169322,126582,724|6|0547|132B,0000,0009|000A||0278|0000,*BE"));
+
+        verifyPosition(decoder, buffer(
+                "$$]138,012896000475498,AAA,35,-6.138255,106.910545,121205074600,A,5,18,0,0,0,49,3800,24826,510|10|0081|4F4F,0000,0011|0012|0010|0963|0000,,*94"));
+
+        verifyPosition(decoder, buffer(
+                "$$d138,012896000475498,AAA,35,-6.138255,106.910545,121205074819,A,7,18,0,0,0,49,3800,24965,510|10|0081|4F4F,0000,000D|0010|0012|0963|0000,,*BF"));
+
+        verifyPosition(decoder, buffer(
+                "$$j138,012896000475498,AAA,35,-6.138306,106.910655,121205103708,A,3,11,0,0,1,36,4182,35025,510|10|0081|4F4F,0000,000A|000C|000A|0915|0000,,*BF"));
+
+        verifyPosition(decoder, buffer(
+                "$$m139,012896005334567,AAA,35,-33.866423,151.190060,121208020649,A,7,27,0,32,4,13,6150,49517,505|2|0B67|5A6C,0000,0000|0000|0000|0977|0000,,*F1"));
+
+        verifyPosition(decoder, buffer(
+                "$$A141,012896005334567,AAA,35,-33.866543,151.190148,121209081758,A,6,27,0,16,1,48,65551,152784,505|2|0B5F|D9D3,0000,0000|0000|0000|0A39|0000,,*5B"));
+        
+        verifyPosition(decoder, buffer(
+                "$$_128,861074020109479,AAA,34,22.512618,114.057065,090215000318,V,0,31,0,0,0,0,0,733,302|720|3EE4|BBB5,0000,0006|0006||028C|0000,*E3"));
+        
+        verifyPosition(decoder, buffer(
+                "$$K146,013227004985762,AAA,35,28.618005,-81.246783,131101213828,A,9,22,0,209,1.1,23,80974,1187923,310|260|2A13|634E,0000,0000|0000|0000|09DA|0B34,,*51"));
+        
+        verifyPosition(decoder, buffer(
+                "$$E150,013777001165479,AAA,35,10.296601,123.872115,140501161505,A,4,22,1,170,1.4,77,39097,393563,515|3|A0CC|ED96,0000,0008|0003|0000|09D5|0000,,,1,0009*1E"));
+
+        verifyPosition(decoder, buffer(
+                "$$B140,013777001293701,AAA,35,-7.266760,112.743550,140521095314,A,3,22,0,275,2.7,45,1984,8059,510|1|3504|EBFE,0000,0000|0000|0000|0914|0002,,*F9\r\n"));
+
+        verifyPosition(decoder, buffer(
+                "$$J163,123123123123123,AFF,0004,35,58.588926,16.180473,140928192856,A,10,27,0,161,1.2,19,1648894,435695,240|24|88B9|E435,0000,|||0A22|0000,00000001,,50,,,,,,,,,,,,,*70\r\n"));
+
+        verifyPositions(decoder, binary(
+                "24245838362c3336393830303031343039303032312c4343432c020134000100000023381f91ffe354b806c5e3121b0009130000000000000000d33801007cbf0200fe0101000435feeb02000500a3010000000000002a62650d0a"),
+                position("2014-05-24 04:59:49.000", false, -7.26650, 112.74365));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/MeitrackProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/MeitrackProtocolEncoderTest.java
new file mode 100644
index 000000000..b63ce5051
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/MeitrackProtocolEncoderTest.java
@@ -0,0 +1,36 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+import static org.junit.Assert.assertEquals;
+
+public class MeitrackProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        MeitrackProtocolEncoder encoder = new MeitrackProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_POSITION_SINGLE);
+
+        assertEquals("@@Q25,123456789012345,A10*68\r\n", encoder.encodeCommand(command));
+
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_REQUEST_PHOTO);
+
+        assertEquals("@@D46,123456789012345,D03,1,camera_picture.jpg*1F\r\n", encoder.encodeCommand(command));
+
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_SEND_SMS);
+        command.set(Command.KEY_PHONE, "15360853789");
+        command.set(Command.KEY_MESSAGE, "Meitrack");
+
+        assertEquals("@@f48,123456789012345,C02,0,15360853789,Meitrack*B0\r\n", encoder.encodeCommand(command));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/MilesmateProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/MilesmateProtocolDecoderTest.java
new file mode 100644
index 000000000..be0209975
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/MilesmateProtocolDecoderTest.java
@@ -0,0 +1,25 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class MilesmateProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        MilesmateProtocolDecoder decoder = new MilesmateProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "ApiString={A:861359037373030,B:09.8,C:00.0,D:083506,E:2838.5529N,F:07717.8049E,G:000.00,H:170918,I:G,J:00004100,K:0000000A,L:1234,M:126.86}"));
+
+        verifyPosition(decoder, text(
+                "ApiString={A:861359037496211,B:12.7,C:06.0,D:060218,E:2837.1003N,F:07723.3162E,G:016.80,H:310818,I:G,J:10010100,K:0000000A,L:1234,M:358.33}"),
+                position("2018-08-31 06:02:18.000", true, 28.61834, 77.38860));
+
+        verifyPosition(decoder, text(
+                "ApiString={A:862631032208018,B:12.1,C:24.4,D:055852,E:2838.5310N,F:07717.8126E,G:000.0,H:200117,I:G,J:10100100,K:1000000A,L:1234,M:324.45}"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/MiniFinderProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/MiniFinderProtocolDecoderTest.java
new file mode 100644
index 000000000..afa930e5b
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/MiniFinderProtocolDecoderTest.java
@@ -0,0 +1,73 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class MiniFinderProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        MiniFinderProtocolDecoder decoder = new MiniFinderProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "!1,867273023933661,V07S.5701.1621,100"));
+
+        verifyAttributes(decoder, text(
+                "!3,ok"));
+
+        verifyNull(decoder, text(
+                "!1,123456789012345"));
+
+        verifyNull(decoder, text(
+                "!5,17,V"));
+
+        verifyNull(decoder, text(
+                "!1,860719027585011"));
+
+        verifyPosition(decoder, text(
+                "!D,02/05/17,19:56:17,47.083542,15.482373,0,0,100001,479.3,100,4,9,0"));
+
+        verifyPosition(decoder, text(
+                "!D,15/04/17,13:58:53,51.483067,-0.452548,60,180,140001,28.7,47,4,13,0"));
+
+        verifyPosition(decoder, text(
+                "!D,07/04/17,05:42:26,-37.588970,145.121231,0,0,0c0001,185.2,92,7,14,1.2"));
+
+        verifyPosition(decoder, text(
+                "!D,28/11/16,00:04:09,42.926067,-85.747589,124,236,140001,179.8,60,11,16,0"));
+
+        verifyPosition(decoder, text(
+                "!C,30/1/16,1:1:6,31.259157,30.020910,0,0,100001,25.32,100,0.03,0.01,0"));
+
+        verifyPosition(decoder, text(
+                "!A,26/10/12,00:28:41,7.770385,-72.215706,0.0,25101,0"));
+
+        verifyPosition(decoder, text(
+                "!A,01/12/10,13:25:35,22.641724,114.023666,000.1,281.6,0"));
+
+        verifyPosition(decoder, text(
+                "!D,08/07/15,04:01:32,40.428257,-3.704808,0,0,170001,701.7,22,5,14,0"));
+
+        verifyPosition(decoder, text(
+                "!D,08/07/15,04:55:13,40.428257,-3.704932,0,0,180001,680.0,8,8,13,0"));
+
+        verifyPosition(decoder, text(
+                "!D,08/07/15,02:01:32,40.428230,-3.704950,4,170,170001,682.7,43,6,13,0"));
+
+        verifyNull(decoder, text(
+                "!1,860719020212696"));
+
+        verifyPosition(decoder, text(
+                "!D,22/2/14,13:40:58,56.899601,14.811541,0,0,1,176.0,98,5,16,0"),
+                position("2014-02-22 13:40:58.000", true, 56.89960, 14.81154));
+
+        verifyPosition(decoder, text(
+                "!D,22/2/14,13:47:51,56.899517,14.811665,0,0,b0001,179.3,97,5,16,0"));
+
+        verifyPosition(decoder, text(
+                "!D,3/7/13,6:35:30,22.645952,114.040436,0.0,225.8,1f0001,12.11,98,0,0,0"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/MiniFinderProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/MiniFinderProtocolEncoderTest.java
new file mode 100644
index 000000000..e9422da9f
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/MiniFinderProtocolEncoderTest.java
@@ -0,0 +1,33 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+import static org.junit.Assert.assertEquals;
+
+public class MiniFinderProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        MiniFinderProtocolEncoder encoder = new MiniFinderProtocolEncoder();
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_SET_TIMEZONE);
+        command.set(Command.KEY_TIMEZONE, "GMT+1");
+
+        assertEquals("123456L+01", encoder.encodeCommand(command));
+
+        command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_SOS_NUMBER);
+        command.set(Command.KEY_INDEX, 2);
+        command.set(Command.KEY_PHONE, "1111111111");
+
+        assertEquals("123456C1,1111111111", encoder.encodeCommand(command));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/MtxProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/MtxProtocolDecoderTest.java
new file mode 100644
index 000000000..c4f15d907
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/MtxProtocolDecoderTest.java
@@ -0,0 +1,18 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class MtxProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        MtxProtocolDecoder decoder = new MtxProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "#MTX,353815011138124,20101226,195550,41.6296399,002.3611174,000,035,000000.00,X,X,1111,000,0,0"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/MxtProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/MxtProtocolDecoderTest.java
new file mode 100644
index 000000000..834a35011
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/MxtProtocolDecoderTest.java
@@ -0,0 +1,45 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class MxtProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        MxtProtocolDecoder decoder = new MxtProtocolDecoder(null);
+
+        verifyPosition(decoder, binary(
+                "01a631144c7e0008643ad2f456fb2d49747cfe4cbe0ffd002008800000001021000fd43d3f1403000000ff300000f42760001031102445a81fda04"));
+
+        verifyPosition(decoder, binary(
+                "01a631361e7a00082471418b052a2c46b587ffc01ae3fd000008800000000000003345422203000000f000f00000000000ea1e04"));
+
+        verifyPosition(decoder, binary(
+                "01a63118787d00086440628d226e2bc26a97feac8a3afd10210010308000000000000018003d2b10240000005e2f0000f427f21031feff0000593804"));
+
+        verifyPosition(decoder, binary(
+                "01a631bd777d0008646e319e17292ce86798fed4cd3afd102110211030800000102403001f15003e2b102400000034300000f4271021007b175535a7be04"));
+
+        verifyPosition(decoder, binary(
+                "01a631e3f97e00087cf40a98151c2cc46898fee0ce3afd1021001030c0000006102116072e003829bb00000036102100001024000000062b0000f42730004b06a6384b4304"));
+
+        verifyPosition(decoder, binary(
+                "01a63118787d00086468457a466a2bc26a97feac8a3afd10212010308000000000001fe1053d291024000000922f0000f4271021007b17553599bb04"));
+
+        verifyPosition(decoder, binary(
+                "01a63118787d0008648645ec486a2bc26a97feac8a3afd1021001030c0000000001419eb05372b1024000000982a0000f4271021007b17000010308c04"));
+
+        verifyPosition(decoder, binary(
+                "01a631e3f97e00087cfa0af3151c2c126798febace3afd1021801030c0000006102122082f003e29bb00000037102100001024000000ab2f0000f42730004b060000488c04"));
+
+        verifyPosition(decoder, binary(
+                "01a631e3f97e00087cfe0a4b161c2c126798febace3afd1021801030800000071021240731003e2abb00000038102100001024000000c12f0000f42730004b06a638633104"));
+
+        verifyPosition(decoder, binary(
+                "01a63118787d0008648645ec486a2bc26a97feac8a3afd1021001030c0000000001419eb05372b1024000000982a0000f4271021007b17000010308c04"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/NavigilProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/NavigilProtocolDecoderTest.java
new file mode 100644
index 000000000..2db4afbf2
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/NavigilProtocolDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class NavigilProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        NavigilProtocolDecoder decoder = new NavigilProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "01004300040020000000f60203080200e7cd0f510c0000003b00000000000000"));
+
+        verifyPosition(decoder, binary(
+                "0100b3000f0024000000f4a803080200ca0c1151ef8885f0b82e6d130400c00403000000"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/NavisFrameDecoderTest.java b/src/test/java/org/traccar/protocol/NavisFrameDecoderTest.java
new file mode 100644
index 000000000..0ebfeacd2
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/NavisFrameDecoderTest.java
@@ -0,0 +1,36 @@
+package org.traccar.protocol;
+
+import org.traccar.ProtocolTest;
+
+import org.junit.Test;
+
+public class NavisFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecodeNtcb() throws Exception {
+
+        NavisFrameDecoder frameDecoder = new NavisFrameDecoder();
+
+        verifyFrame(binary(
+                "404e5443010000000000000059009adb2a3e54250000000000ff1500040b0a1008291838001200760ee600000000000000000000000f1500040b0a10ac20703fb1aec23f00000000320149668f430000000000000000000000000000000000000000000000f3808080"),
+                frameDecoder.decode(null, null, binary("404e5443010000000000000059009adb2a3e54250000000000ff1500040b0a1008291838001200760ee600000000000000000000000f1500040b0a10ac20703fb1aec23f00000000320149668f430000000000000000000000000000000000000000000000f3808080")));
+
+    }
+
+    @Test
+    public void testDecodeFlex10() throws Exception {
+
+        NavisFrameDecoder frameDecoder = new NavisFrameDecoder();
+
+        frameDecoder.setFlexDataSize(73);
+
+        verifyFrame(binary(
+                "7e54040000000400000030129957405c000b00632f9857405ccace03021e129101a103000000000000c4005ba3fe3b00000000120046100000000000001aff7f000080bfffff80000080bfffffffff9f"),
+                frameDecoder.decode(null, null, binary("7e54040000000400000030129957405c000b00632f9857405ccace03021e129101a103000000000000c4005ba3fe3b00000000120046100000000000001aff7f000080bfffff80000080bfffffffff9f")));
+
+        verifyFrame(binary(
+                "7e4101080000000917c057405c002b001833c057405cbbce030225129101a00300007c6102408900400c1b3cfce3b23a12004710e000000000001bff7f000080bfffff80000080bfffffffffb2"),
+                frameDecoder.decode(null, null, binary("7e4101080000000917c057405c002b001833c057405cbbce030225129101a00300007c6102408900400c1b3cfce3b23a12004710e000000000001bff7f000080bfffff80000080bfffffffffb2")));
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/NavisProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/NavisProtocolDecoderTest.java
new file mode 100644
index 000000000..33a6bab24
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/NavisProtocolDecoderTest.java
@@ -0,0 +1,79 @@
+package org.traccar.protocol;
+
+import org.traccar.ProtocolTest;
+
+import org.junit.Test;
+
+public class NavisProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecodeNtcb() throws Exception {
+
+        NavisProtocolDecoder decoder = new NavisProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "404E5443010000007B000000130044342A3E533A383631373835303035323035303739"));
+
+        verifyNull(decoder, binary(
+                "404E5443010000007B000000130047372A3E533A383631373835303035313236303639"));
+
+        verifyPosition(decoder, binary(
+                "404e5443010000000000000059009adb2a3e54250000000000ff1500040b0a1008291838001200760ee600000000000000000000000f1500040b0a10ac20703fb1aec23f00000000320149668f430000000000000000000000000000000000000000000000f3808080"),
+                position("2016-11-11 21:00:04.000", true, 53.74336, 87.14437));
+
+        verifyPositions(decoder, binary(
+                "404e544300000000040000005a00c6812a3e410125e3a60700011705071503011030210c0000fa200910e6000000000000000000000001082106150010ae97643f88a39f3f0000000090001fcc6c450000000000000000000000000000000000000000000000f6808080"));
+
+        verifyPositions(decoder, binary(
+                "404e544301000000000000005a002e6c2a3e410125d7540100001512233a0b0a0f08026300000a000b000b00020000000000000000000c12233b0b0a0f03fd6d3f0fde603f00000000ba0051e0c845000000000000000000000000000000000000000000000080808080"));
+
+        verifyPositions(decoder, binary(
+                "404E5443010000007B0000005A0050692A3E410125DB0E00000015110707110A0C0880630000AA39A2381600020000000000000000000C110708110A0CB389793F1AEF263F00000000120034F516440000000000000000000000FAFF000000FAFF000000FAFF80808080"));
+
+        verifyPosition(decoder, binary(
+                "404e544301000000cdfbf5027200852e2a3e5406aa170000c11116162410001310a9110e80996b281003000a0008000000000000000000d207d207ffffff00fbff00fbff00fbff00fbff00fbff00fbff00fbff2d808080ffffffffffff2b161624100013509b0302b0f89201830500000000000037002fb8cf43eed5843a35003500"),
+                position("2019-01-16 22:22:36.000", true, 56.31800, 44.01523));
+
+        verifyPositions(decoder, binary(
+                "404e54430100000045635902730081972a3e4101060b7e0e000b171328050d00133029110e00bc6141100200000000000000000000000000d207d307ffffff00fbff00fbff00fbff00fbff00fbff00fbff00fbff02808080ffffffffffff4f1328050d001371cd0302c5109101a60300000000000000003d1b37470000000096009600"));
+    }
+
+    @Test
+    public void testDecodeFlex10() throws Exception {
+
+        NavisProtocolDecoder decoder = new NavisProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "404e544301000000c9b5f602130046c52a3e533a383639363936303439373232383235"));
+
+        verifyNull(decoder, binary(
+                "404e544301000000aaecf6021300c8712a3e464c4558b00a0a45ffff300a08080f8388"));
+
+        verifyPosition(decoder, binary(
+                "7e54040000000400000030129957405c000b00632f9857405ccace03021e129101a103000000000000c4005ba3fe3b00000000120046100000000000001aff7f000080bfffff80000080bfffffffff9f"),
+                position("2019-01-17 10:23:20.000", true, 56.33996, 43.80762));
+
+        verifyPositions(decoder, binary(
+                "7e4101080000000917c057405c002b001833c057405cbbce030225129101a00300007c6102408900400c1b3cfce3b23a12004710e000000000001bff7f000080bfffff80000080bfffffffffb2"));
+    }
+
+    @Test
+    public void testDecodeFlex20() throws Exception {
+
+        NavisProtocolDecoder decoder = new NavisProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "404e544301000000a9eef602130043fb2a3e533a383639363936303439373337333835"));
+
+        verifyNull(decoder, binary(
+                "404e544301000000a9eef6021a003f8e2a3e464c4558b014147afffff008080800000e00000000000000"));
+
+        verifyPosition(decoder, binary(
+                "7e5428000000280000002111d16b435c00a900154bd16b435ce19e030259f6920133050000b7623e429300c9e7f03f2ba45a3e1f001f007b6c5910850f0100001629080a000000000000060947"),
+                position("2019-01-19 18:26:25.000", true, 56.31952, 44.01423));
+
+        verifyPositions(decoder, binary(
+                "7e4101270000000b17b16b435c00a9000d4bb26b435caaa2030229f29201620500000000000093004493d53fee892d3e1f001f00ac6c591081f00000001700080a0000000000000609f2"));
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/NeosProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/NeosProtocolDecoderTest.java
new file mode 100644
index 000000000..a8db30476
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/NeosProtocolDecoderTest.java
@@ -0,0 +1,18 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class NeosProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        NeosProtocolDecoder decoder = new NeosProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                ">12345678,1,1,070201,144111,W05829.2613,S3435.2313,,00,034,25,00,126-000,0,3,11111111*2d!\r\n"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/NoranProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/NoranProtocolDecoderTest.java
new file mode 100644
index 000000000..7c02402b1
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/NoranProtocolDecoderTest.java
@@ -0,0 +1,45 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class NoranProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        NoranProtocolDecoder decoder = new NoranProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "0d0a2a4b57000d000080010d0a"));
+
+        verifyPosition(decoder, binary(
+                "34000800010b0000000000003f43bb8da6c2ebe229424e523039423233343439000031362d30392d31352030373a30303a303700"));
+
+        verifyPosition(decoder, binary(
+                "28003200c380000000469458408c4ad340ad381e3f4e52303947313336303900000001ff00002041"));
+
+        verifyPosition(decoder, binary(
+                "28003200c38000d900fcc97a416b1a7a42b43eef3d4e523039473034383737000000000092fcda4a"));
+
+        verifyPosition(decoder, binary(
+                "3400080001090000000000001D43A29BE842E62520424E523039423036363932000031322D30332D30352031313A34373A343300"));
+        
+        verifyPosition(decoder, binary(
+                "34000800010c000000000080a3438e20944149bd07c24e523039423139323832000031352d30342d32362030383a34333a353300"));
+
+        verifyNull(decoder, binary(
+                "0f0000004e52303946303431353500"));
+
+        verifyPosition(decoder, binary(
+                "22000800010c008a007e9daa42317bdd41a7f3e2384e523039463034313535000000"));
+
+        verifyPosition(decoder, binary(
+                "34000800010c0000000000001c4291251143388d17c24e523039423131303930000031342d31322d32352030303a33333a303700"));
+        
+        verifyPosition(decoder, binary(
+                "34000800010c00000000000000006520944141bd07c24e523039423139323832000031352d30342d32352030303a30333a323200"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/NoranProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/NoranProtocolEncoderTest.java
new file mode 100644
index 000000000..38599e0ba
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/NoranProtocolEncoderTest.java
@@ -0,0 +1,23 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+public class NoranProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        NoranProtocolEncoder encoder = new NoranProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_ENGINE_STOP);
+
+        verifyCommand(encoder, command, binary(
+                "0d0a2a4b5700440002000000000000002a4b572c3030302c3030372c3030303030302c302300000000000000000000000000000000000000000000000000000000000d0a"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/NvsFrameDecoderTest.java b/src/test/java/org/traccar/protocol/NvsFrameDecoderTest.java
new file mode 100644
index 000000000..8a00207eb
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/NvsFrameDecoderTest.java
@@ -0,0 +1,25 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assert.assertEquals;
+
+public class NvsFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        NvsFrameDecoder decoder = new NvsFrameDecoder();
+
+        assertEquals(
+                binary("0012333537303430303630303137383234312e38"),
+                decoder.decode(null, null, binary("0012333537303430303630303137383234312e38")));
+
+        assertEquals(
+                binary("cccccccc0073000144b9ddf2aca002015694823d1f165d80902139a44f00aa001e1400000103000a080115001a001d001e0141004001f00065001301061600001700001800004231da430000440000085000000000480000000049000000004a0000000047ffffffff6900000004c700000000e10000000100954a"),
+                decoder.decode(null, null, binary("cccccccc0073000144b9ddf2aca002015694823d1f165d80902139a44f00aa001e1400000103000a080115001a001d001e0141004001f00065001301061600001700001800004231da430000440000085000000000480000000049000000004a0000000047ffffffff6900000004c700000000e10000000100954a")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/NvsProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/NvsProtocolDecoderTest.java
new file mode 100644
index 000000000..9a516e733
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/NvsProtocolDecoderTest.java
@@ -0,0 +1,30 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class NvsProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        NvsProtocolDecoder decoder = new NvsProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "0012333537303430303630303137383234312e38"));
+
+        verifyNull(decoder, binary(
+                "0012313233343536373839303132333435312E31"));
+
+        verifyPositions(decoder, binary(
+                "cccccccc0073000144b9ddf2aca002015694823d1f165d80902139a44f00aa001e1400000103000a080115001a001d001e0141004001f00065001301061600001700001800004231da430000440000085000000000480000000049000000004a0000000047ffffffff6900000004c700000000e10000000100954a"));
+
+        verifyPositions(decoder, binary(
+                "CCCCCCCC00FE00007048860DDF79020446a6f1ce010f14f650209cca80006f00d6040004010300030101150316030001460000015d0046a6f1dc0d0f14ffe0209cc580006e00c7050001010300030101150316010001460000015e0046a6f1ea0e0f150f00209cd20000950108040000010300030101150016030001460000015d0046a6f1ff0b0f150a50209cccc000930068040000010300030101150016030001460000015b006123"));
+
+        verifyPositions(decoder, binary(
+                "cccccccc0217000144b9ddf2aca002055683f72b01165d80632139a3c800ab00ce0a00000403000a080115bf1a001d001e0141004001f00065011301061600001700001800004231a9430000440000085000000000480000000049000000004a0000000047ffffffff69000000b7c700000000e100000001005683f74901165d80632139a3c800ab012a0a00000403000a080115bf1a001d001e0141004001f00065011301061600001700001800004231a9430000440000085000000000480000000049000000004a0000000047ffffffff69000000b8c700000000e100000001005683f76801165d80632139a3c800ab00590a00000403000a080115bf1a001d001e0141004001f00065011301061600001700001800004231a9430000440000085000000000480000000049000000004a0000000047ffffffff69000000b9c700000000e100000001005683f78601165d80632139a3c800ab00c80a00000403000a080115bf1a001d001e0141004001f00065011301061600001700001800004231a9430000440000085000000000480000000049000000004a0000000047ffffffff69000000bac700000000e100000001005683f7a401165d80632139a3c800ab01310a00000403000a080115bf1a001d001e0141004001f00065011301061600001700001800004231a9430000440000085000000000480000000049000000004a0000000047ffffffff69000000bbc700000000e100000001001d72"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/NyitechProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/NyitechProtocolDecoderTest.java
new file mode 100644
index 000000000..4cafd7612
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/NyitechProtocolDecoderTest.java
@@ -0,0 +1,30 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class NyitechProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        NyitechProtocolDecoder decoder = new NyitechProtocolDecoder(null);
+
+        verifyPosition(decoder, binary(
+                "4040690030313436383230303238373201201c0c12031a308080801c0c12031a3007d67e7e08aceb841002000000ae08000000000000000000000000001e002900f0ffdd002700f2ffe0002700f2ffe1002400f0ffdf002400f3ffe3008a00ffff01010000a9c70d0a"));
+
+        verifyPosition(decoder, binary(
+                "4040390030313436383230303238373203200100010c000000001c0c1203192a1b0c12171d3104fed87d089288801000000000000011ec0d0a"));
+
+        verifyPosition(decoder, binary(
+                "4040480030313436383230303238373201101c0c12031a2907fa7e7e08b8eb841002000000bc080101040904040300010100000a818283848586878862611c0c12031a293f9c0d0a"));
+
+        verifyPosition(decoder, binary(
+                "40404b003247512d313630313030313901101e0b100604190c02c83707f887ac0f000000002d130101030304020000010100000d426162636465666768696a6ba51e0b1006041965c30d0a"));
+
+        verifyPosition(decoder, binary(
+                "4040490030313436383230303238373202201c0c120319348080001b0c12171d3104fed87d0892888010000000000000000000000000000000000000008b00ffff010100008a480d0a"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/ObdDongleProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/ObdDongleProtocolDecoderTest.java
new file mode 100644
index 000000000..4c33d1766
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/ObdDongleProtocolDecoderTest.java
@@ -0,0 +1,22 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class ObdDongleProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        ObdDongleProtocolDecoder decoder = new ObdDongleProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "55550003383634383637303232353131303135010009010011023402010201ABAAAA"));
+
+        verifyPosition(decoder, binary(
+                "5555000338363438363730323235313130313503000100010355AABBCC184F1ABC614E21C1FA08712A84ABAAAA"),
+                position("2015-07-18 20:49:16.000", true, 22.12346, -123.45678));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/OigoProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/OigoProtocolDecoderTest.java
new file mode 100644
index 000000000..c79978f88
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/OigoProtocolDecoderTest.java
@@ -0,0 +1,42 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class OigoProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        OigoProtocolDecoder decoder = new OigoProtocolDecoder(null);
+
+        verifyPosition(decoder, binary(
+                "7e002e000000146310002523830400001bfb000369150f310c0591594d062ac0c0141508011303cd63101604fd00000000"));
+
+        verifyPosition(decoder, binary(
+                "0103537820628365110310410790660962521813380026EE4EFF8593AA0065003E00794C020600100500000000"));
+
+        verifyPosition(decoder, binary(
+                "0E03537820628344660204043255862749531B100E0026EE3AFF8593A3FFFE00BF00044C20090710C300000000"));
+
+        verifyPosition(decoder, binary(
+                "00035378206638500203340201271426226b190203001ac000ff72eedd00370097238b4c34116a130b000094d9"));
+
+        verifyPosition(decoder, binary(
+                "1d035378206638500203340201271426226b19020c001ab144ff72f74d005f0097298a4c1d066d130b000094de"));
+
+        verifyPosition(decoder, binary(
+                "00035378206638500203340201271426226b191016001c04e5ff760081013d002900814c1a0f5e130b00009576"));
+
+        verifyPosition(decoder, binary(
+                "7e004200000014631000258257000000ffff02d0690e000220690e0002200696dbd204bdfde31a070000b307101135de106e05f500000000010908010402200104ffff8001"));
+
+        verifyPosition(decoder, binary(
+                "7e004200000014631000258257000000ffff02d1690e00051f690e00051f0696dbd204bdfde31a070000b307100f35c0106305f500000000010908010402200104ffff8001"));
+
+        verifyPosition(decoder, binary(
+                "7e004200000014631000258257000000ffff0d82691300001669130000160696dbd804bdfdbb1a0800000007101035a2106905f500000000010908010402200104ffff8001"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/OkoProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/OkoProtocolDecoderTest.java
new file mode 100644
index 000000000..e2f72c161
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/OkoProtocolDecoderTest.java
@@ -0,0 +1,33 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class OkoProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        OkoProtocolDecoder decoder = new OkoProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "{861694033681089,045403.00,A,4924.14181,N,03207.43787,E,0.080,,151117,07,0.00,01,24.8,1,02,5n4}"));
+
+        verifyPosition(decoder, text(
+                "{045411.00,A,4924.14243,N,03207.43754,E,0.172,,151117,07,0.00,F9,28.1,2,C2,5n4}"));
+
+        verifyPosition(decoder, text(
+                "{861001001016415,115031.000,A,4804.101180,N,02255.227002,E,4.121,111.0,211215,6,0.00,F7,13.6,1,00"));
+
+        verifyPosition(decoder, text(
+                "{132810.000,A,4926.4243,N,03203.6831,E,25.0,183,131011,07,5.69,05,14.1,1,82,3N5"));
+
+        verifyPosition(decoder, text(
+                "{115034.000,A,4804.098944,N,02255.233436,E,7.858,120.9,211215,7,0.00,F7,13.7,1,00"));
+
+        verifyPosition(decoder, text(
+                "{115038.000,A,4804.091227,N,02255.250213,E,17.621,128.1,211215,8,0.00,00,13.7,2,00"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/OpenGtsProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/OpenGtsProtocolDecoderTest.java
new file mode 100644
index 000000000..a04cf4e72
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/OpenGtsProtocolDecoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class OpenGtsProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        OpenGtsProtocolDecoder decoder = new OpenGtsProtocolDecoder(null);
+
+        verifyPosition(decoder, request(
+                "/?id=999000000000003&gprmc=$GPRMC,082202.0,A,5006.747329,N,01416.512315,E,0.0,,131018,1.2,E,A*2E"));
+
+        verifyPosition(decoder, request(
+                "/?id=gprmc_999000000000003&gprmc=$GPRMC,143013.0,A,5006.728217,N,01416.437869,E,0.0,329.6,281017,1.2,E,A*0E"));
+
+        verifyPosition(decoder, request(
+                "/?id=123456789012345&dev=dev_name&acct=account&batt=0&code=0xF020&alt=160.5&gprmc=$GPRMC,191555,A,5025.46624,N,3030.39937,E,0.000000,0.000000,200218,,*2F"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/OrionProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/OrionProtocolDecoderTest.java
new file mode 100644
index 000000000..bb5f1f135
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/OrionProtocolDecoderTest.java
@@ -0,0 +1,30 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class OrionProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        OrionProtocolDecoder decoder = new OrionProtocolDecoder(null);
+
+        verifyPositions(decoder, binary(
+                "5057000137bf6236235a0331b5c6e402a3b5ecff5102980003000e0c1d172936080e0c1d172936b03b01000882050000008e080000000000008c0300940500000084030085030003067600900113150000000000000000000000000000000000000004a4c8"));
+
+        verifyPositions(decoder, binary(
+                "5057004107367C242B440901ADE97D0163143B07B003000000000D041917382D000B0101000511000000000682050000008E080000000000008C0300840300850300090A0000000048010000008AFC"));
+
+        verifyPositions(decoder, binary(
+                "5057004107367C242C440901ADE97D0163143B07B003000000000D041917382D000B0101000513000000000682050000008E080000000000008C0300840300850300090A000000003BFEFFFF01FAE5"));
+
+        verifyPositions(decoder, binary(
+                "5057004107367C242D440901ADE97D0163143B07B003000000000D041917382D000B0101000514000000000682050000008E080000000000008C0300840300850300090A00000000FDFDFFFF023721"));
+
+        verifyPositions(decoder, binary(
+                "505700412ac86236354009114d20e402210f1f00d204000000000e06110d3414000b0101001228000000000682050000008e080000000000008c030084030085030003067b006801000930"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/OsmAndProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/OsmAndProtocolDecoderTest.java
new file mode 100644
index 000000000..3c38bd831
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/OsmAndProtocolDecoderTest.java
@@ -0,0 +1,48 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class OsmAndProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        OsmAndProtocolDecoder decoder = new OsmAndProtocolDecoder(null);
+
+        verifyNotNull(decoder, request(
+                "/?id=123456&timestamp=1377177267&cell=257,02,16,2224&cell=257,02,16,2223,-90&wifi=00-14-22-01-23-45,-80&wifi=00-1C-B3-09-85-15,-70"));
+
+        verifyNull(decoder, request(
+                "/?timestamp=1377177267&lat=60.0&lon=30.0"));
+
+        verifyPosition(decoder, request(
+                "/?id=902064&lat=42.06288&lon=-88.23412&timestamp=2016-01-27T18%3A55%3A47Z&hdop=6.0&altitude=224.0&speed=0.0"));
+
+        verifyPosition(decoder, request(
+                "/?id=902064&lat=42.06288&lon=-88.23412&timestamp=1442068686579&hdop=6.0&altitude=224.0&speed=0.0"));
+
+        verifyPosition(decoder, request(
+                "/?lat=49.60688&lon=6.15788&timestamp=2014-06-04+09%3A10%3A11&altitude=384.7&speed=0.0&id=353861053849681"));
+        
+        verifyPosition(decoder, request(
+                "/?id=123456&timestamp=1377177267&lat=60.0&lon=30.0&speed=0.0&bearing=0.0&altitude=0&hdop=0.0"));
+        
+        verifyPosition(decoder, request(
+                "/?id=123456&timestamp=1377177267&lat=60.0&lon=30.0"));
+        
+        verifyPosition(decoder, request(
+                "/?lat=60.0&lon=30.0&speed=0.0&heading=0.0&vacc=0&hacc=0&altitude=0&deviceid=123456"));
+
+        verifyPosition(decoder, request(
+                "/?id=861001000719969&lat=41.666667&lon=-0.883333&altitude=350.059479&speed=0.000000&batt=87"));
+
+        verifyPosition(decoder, request(
+                "/?id=123456&timestamp=1377177267&location=60.0,30.0"));
+
+        verifyPosition(decoder, request(
+                "/?id=123456789012345&timestamp=1504763810&lat=40.7232948571&lon=-74.0061408571&bearing=7.19889788244&speed=40&ignition=true&rpm=933&fuel=24"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/OwnTracksProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/OwnTracksProtocolDecoderTest.java
new file mode 100644
index 000000000..248920e21
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/OwnTracksProtocolDecoderTest.java
@@ -0,0 +1,27 @@
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.HttpMethod;
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class OwnTracksProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        OwnTracksProtocolDecoder decoder = new OwnTracksProtocolDecoder(null);
+
+        verifyPosition(decoder, request(HttpMethod.POST, "/",
+                buffer("{\"_type\":\"location\",\"acc\":15,\"alt\":440,\"batt\":46,\"conn\":\"w\",\"lat\":46.0681247,\"lon\":11.1512805,\"t\":\"u\",\"tid\":\"5t\",\"tst\":1551874878,\"vac\":2,\"vel\":0}")));
+
+        verifyPosition(decoder, request(HttpMethod.POST, "/",
+                buffer("{\"lon\":2.29513,\"lat\":48.85833,\"tst\":1497349316,\"_type\":\"location\",\"tid\":\"JJ\"}")));
+
+        verifyPosition(decoder, request(HttpMethod.POST, "/",
+                buffer("{\"cog\":271,\"lon\":2.29513,\"acc\":5,\"vel\":61,\"vac\":21,\"lat\":48.85833,\"tst\":1497349316,\"alt\":167,\"_type\":\"location\",\"tid\":\"JJ\",\"t\":\"u\",\"batt\":67}")));
+
+        verifyPosition(decoder, request(HttpMethod.POST, "/",
+                buffer("{\"lat\":48.85,\"lon\":2.295,\"_type\":\"location\",\"tid\":\"JJ\",\"tst\":1497476456}")));
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/PathAwayProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/PathAwayProtocolDecoderTest.java
new file mode 100644
index 000000000..4b9739242
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/PathAwayProtocolDecoderTest.java
@@ -0,0 +1,18 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class PathAwayProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        PathAwayProtocolDecoder decoder = new PathAwayProtocolDecoder(null);
+        
+        verifyPosition(decoder, request(
+                "?UserName=name&Password=pass&LOC=$PWS,1,\"Roger\",,,100107,122846,45.317270,-79.642219,45.00,42,1,\"Comment\",0*58"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/PiligrimProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/PiligrimProtocolDecoderTest.java
new file mode 100644
index 000000000..03d0dd7b9
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/PiligrimProtocolDecoderTest.java
@@ -0,0 +1,20 @@
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.HttpMethod;
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class PiligrimProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        PiligrimProtocolDecoder decoder = new PiligrimProtocolDecoder(null);
+        
+        verifyPositions(decoder, request(HttpMethod.POST,
+                "/bingps?imei=868204005544720&csq=18&vout=00&vin=4050&dataid=00000000",
+                binary("fff2200d4110061a32354f3422310062000a0005173b0000a101000300005e00fff2200d4110100932354f2b22310042000b000e173b00009f01000700006000")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/PretraceProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/PretraceProtocolDecoderTest.java
new file mode 100644
index 000000000..61a057dd7
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/PretraceProtocolDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class PretraceProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        PretraceProtocolDecoder decoder = new PretraceProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "(867967021915915U1110A1701201500102238.1700N11401.9324E000264000000000009001790000000,&P11A4,F1050^47"));
+
+        verifyPosition(decoder, text(
+                "(864244029498838U1110A1509250653072238.1641N11401.9213E000196000000000406002990000000,&P195%,T1050,F14A5,R104C51E47B^30"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/PretraceProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/PretraceProtocolEncoderTest.java
new file mode 100644
index 000000000..1b2780325
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/PretraceProtocolEncoderTest.java
@@ -0,0 +1,39 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+import static org.junit.Assert.assertEquals;
+
+public class PretraceProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncodePositionPeriodic() throws Exception {
+
+        PretraceProtocolEncoder encoder = new PretraceProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_POSITION_PERIODIC);
+        command.set(Command.KEY_FREQUENCY, 300);
+        
+        assertEquals("(123456789012345D221300,300,,^69)", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodeCustom() throws Exception {
+
+        PretraceProtocolEncoder encoder = new PretraceProtocolEncoder();
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_CUSTOM);
+        command.set(Command.KEY_DATA, "D21012");
+
+        assertEquals("(123456789012345D21012^44)", encoder.encodeCommand(command));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/PricolProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/PricolProtocolDecoderTest.java
new file mode 100644
index 000000000..dbc1665fb
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/PricolProtocolDecoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class PricolProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        PricolProtocolDecoder decoder = new PricolProtocolDecoder(null);
+
+        verifyPosition(decoder, binary(
+                "3c5052493030303350020000011402110b222b0455152e4e001de819ca450000000000000003820249000000000000000000000000000000000000000040003e"));
+
+        verifyNotNull(decoder, binary(
+                "3c544553303030324b02000000000000000000000000000000000000000000000000000000037c01f4000000000000000000000000000000000000000000003e"));
+
+        verifyPosition(decoder, binary(
+                "3c4944303030303150FFFFFFFF1C050C121D38045D09FA4e001DE815F4452FFFFFFFFFFF03FF03FF03FF03FF03FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF113e"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/ProgressProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/ProgressProtocolDecoderTest.java
new file mode 100644
index 000000000..5f6f564b1
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/ProgressProtocolDecoderTest.java
@@ -0,0 +1,18 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class ProgressProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        ProgressProtocolDecoder decoder = new ProgressProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "020037000100000003003131310f003335343836383035313339303036320f00323530303136333832383531353535010000000100000000000000e6bb97b6"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Pt3000ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Pt3000ProtocolDecoderTest.java
new file mode 100644
index 000000000..e7d87d583
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Pt3000ProtocolDecoderTest.java
@@ -0,0 +1,22 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Pt3000ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Pt3000ProtocolDecoder decoder = new Pt3000ProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "%356939010012099,$GPRMC,124945.752,A,4436.6245,N,01054.4634,E,0.11,358.52,060408,,,A,+393334347445,N028d"),
+                position("2008-04-06 12:49:45.000", true, 44.61041, 10.90772));
+
+        verifyPosition(decoder, text(
+                "%356939010014433,$GPRMC,172821.000,A,4019.5147,N,00919.1160,E,0.00,,010613,,,A,+393998525043,N098d"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Pt502FrameDecoderTest.java b/src/test/java/org/traccar/protocol/Pt502FrameDecoderTest.java
new file mode 100644
index 000000000..487a8500c
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Pt502FrameDecoderTest.java
@@ -0,0 +1,39 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Pt502FrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Pt502FrameDecoder decoder = new Pt502FrameDecoder();
+
+        verifyFrame(
+                binary("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"),
+                decoder.decode(null, null, binary("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")));
+
+        verifyFrame(
+                binary("244655533836353332383032363234333836342c3531302d56312e31322c4131312d56332e30"),
+                decoder.decode(null, null, binary("bffb192d00244655533836353332383032363234333836342c3531302d56312e31322c4131312d56332e300d0d")));
+
+        verifyFrame(
+                binary("24504f532c313336303030303237372c3138323234312e3030302c412c303834362e303839362c4e2c30373535322e313733382c572c31332e35382c32362e38382c3239313031372c2c2c412f30303030302c30303030302f3134322c302c302c302f36323739323930302f2f6636352f2f23"),
+                decoder.decode(null, null, binary("bffb57d50124504f532c313336303030303237372c3138323234312e3030302c412c303834362e303839362c4e2c30373535322e313733382c572c31332e35382c32362e38382c3239313031372c2c2c412f30303030302c30303030302f3134322c302c302c302f36323739323930302f2f6636352f2f230a24504f532c313336303030303237372c3138323235312e3030302c412c303834362e313234382c4e2c30373535322e313534352c572c31352e35322c33362e39332c3239313031372c2c2c412f30303030302c30303030302f3134312c302c302c302f36323739333030302f2f6636382f2f230a24504f532c313336303030303237372c3138323332342e3030302c412c303834362e323633362c4e2c30373535322e303630352c572c31382e39342c32392e39302c3239313031372c2c2c412f30303030302c30303030302f3133652c302c302c302f36323739333330302f2f6639372f2f230a24504f532c313336303030303237372c3138323332362e3030302c412c303834362e323733302c4e2c30373535322e303535342c572c31392e31322c33302e34322c3239313031372c2c2c412f30303030302c30303030302f3134302c302c302c302f36323739333330302f2f6639382f2f230a")));
+
+        verifyFrame(
+                binary("24504f532c3836353332383032363234333836342c3134343733352e3030302c412c313333322e373038332c4e2c3230342e363833312c452c302e302c3233302e30302c3032303531372c2c2c412f30303030302c31302f312c302f3233342f2f4646392f"),
+                decoder.decode(null, null, binary("24504f532c3836353332383032363234333836342c3134343733352e3030302c412c313333322e373038332c4e2c3230342e363833312c452c302e302c3233302e30302c3032303531372c2c2c412f30303030302c31302f312c302f3233342f2f4646392f0d0a")));
+
+        verifyFrame(
+                binary("24504f532c3335333435313030303136342c3038323430352e3030302c412c313235342e383530312c4e2c31303035312e363735322c452c302e30302c3233372e39392c3136303531332c2c2c412f303030302c302f302f35353030302f2f6137312f"),
+                decoder.decode(null, null, binary("24504f532c3335333435313030303136342c3038323430352e3030302c412c313235342e383530312c4e2c31303035312e363735322c452c302e30302c3233372e39392c3136303531332c2c2c412f303030302c302f302f35353030302f2f6137312f0d0a")));
+
+        verifyFrame(
+                binary("24504f532c3335333435313030303136342c3038323430352e3030302c412c313235342e383530312c4e2c31303035312e363735322c452c302e30302c3233372e39392c3136303531332c2c2c412f303030302c302f302f35353030302f2f6137312f"),
+                decoder.decode(null, null, binary("bffb1b6a0024504f532c3335333435313030303136342c3038323430352e3030302c412c313235342e383530312c4e2c31303035312e363735322c452c302e30302c3233372e39392c3136303531332c2c2c412f303030302c302f302f35353030302f2f6137312f0d0a")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Pt502ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Pt502ProtocolDecoderTest.java
new file mode 100644
index 000000000..cb1c1eb0e
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Pt502ProtocolDecoderTest.java
@@ -0,0 +1,86 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Position;
+
+public class Pt502ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Pt502ProtocolDecoder decoder = new Pt502ProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "24504844302c3936302cffd8ffdb008400140e0f120f0d14121012171514181e32211e1c1c1e3d2c2e243249404c4b47404645505a736250556d5645466488656d777b8182814e608d978c7d96737e817c011517171e1a1e3b21213b7c5346537c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7c7cffc000110800f0014003012100021101031101ffdd0004000affc401a20000010501010101010100000000000000000102030405060708090a0b100002010303020403050504040000017d01020300041105122131410613516107227114328191a1082342b1c11552d1f02433627282090a161718191a25262728292a3435363738393a434445464748494a535455565758595a636465666768696a737475767778797a838485868788898a92939495969798999aa2a3a4a5a6a7a8a9aab2b3b4b5b6b7b8b9bac2c3c4c5c6c7c8c9cad2d3d4d5d6d7d8d9dae1e2e3e4e5e6e7e8e9eaf1f2f3f4f5f6f7f8f9fa0100030101010101010101010000000000000102030405060708090a0b1100020102040403040705040400010277000102031104052131061241510761711322328108144291a1b1c109233352f0156272d10a162434e125f11718191a262728292a35363738393a434445464748494a535455565758595a636465666768696a737475767778797a82838485868788898a92939495969798999aa2a3a4a5a6a7a8a9aab2b3b4b5b6b7b8b9bac2c3c4c5c6c7c8c9cad2d3d4d5d6d7d8d9dae2e3e4e5e6e7e8e9eaf2f3f4f5f6f7f8f9faffda000c03010002110311003f00e5292800ef450020a2800a2801d49400b450014b40052e2800a69340094a05007fffd0e5d14b10055b51b00c76a00527273494005250014500251400525001450015347c25003a928010d25007ffd1e52909a00290d0014b40052d0014500145002e297b50018a280109a6d002d2e2803fffd2e7a04da3777a94fbd0025140052500145002514005250014940054e381400b494008690d007fffd3e4f345001486800a5a005a2800a2801680280168a002909e280100cd028016a48937bfb5007fffd4c5038a42280128a004a280128a003ad2500251400945002a8cb0a9a80133450026692803ffd5e4e8a004a2801694500145002d18a005c5140052e280109a69a0029680140abb147b139eb401ffd6c62290d00251400949400114940052500252d002525003e31c93525002521a004a4a00ffd7e4a8a00281400a29d40094b40053ba500252d0018a31400d3cd250018cd2d005ab58777ccdd074ab645007ffd0c72290d00348a2801280"));
+
+        verifyPosition(decoder, buffer(
+                "$PHO3821-1,1156802639,022125.000,A,0707.0014,N,07307.3725,W,0.0,0.1,110418,,,A/00000,00000/0,0,0,0/500//fd4//"));
+
+        verifyPosition(decoder, buffer(
+                "$POS,1360000277,182241.000,A,0846.0896,N,07552.1738,W,13.58,26.88,291017,,,A/00000,00000/142,0,0,0/62792900//f65//#"));
+
+        verifyPosition(decoder, buffer(
+                "$PHO0-1,1360000260,123012.000,A,0913.9644,N,07548.8345,W,0.0,309.8,111017,,,A/00000,10000/0,0,0,0/64551600//f98//"));
+
+        verifyPosition(decoder, buffer(
+                "$POS,865328026243864,151105.000,A,1332.7096,N,204.6787,E,0.0,10.00,050517,,,A/00000,10/1,0/234//FD9/"));
+
+        verifyNull(decoder, buffer(
+                "$FUS865328026243864,510-V1.12,A11-V3.0"));
+
+        verifyPosition(decoder, buffer(
+                "$HDA,20007,134657.000,A,0626.1607,N,00330.2245,E,33.38,81.79,041016,,,A/00010,00000/270,0,0,0/19948900//fa4//"));
+
+        verifyPosition(decoder, buffer(
+                "$HDB,20007,134708.000,A,0626.1759,N,00330.3192,E,26.55,80.37,041016,,,A/00010,00000/23b,0,0,0/19949100//fa4//"));
+
+        verifyPosition(decoder, buffer(
+                "$POS,20007,134704.000,A,0626.1698,N,00330.2870,E,31.23,79.58,041016,,,A/00010,00000/26c,0,0,0/19949100//fa4//#"));
+
+        verifyPosition(decoder, buffer(
+                "$PHO6608,115099,133140.000,A,1307.1238,N,05936.4194,W,0.00,21.50,290816,,,A/00010,00000/0,0,0,0/185100//f59/"));
+
+        verifyPosition(decoder, buffer(
+                "$DFR,40456789,083125.000,A,2232.0971,N,11400.9504,E,0.0,5.00,090714,,,A/00000,00/0,0/200076//FE7/"));
+
+        verifyPosition(decoder, buffer(
+                "$FDA,40456789,083125.000,A,2232.0971,N,11400.9504,E,0.0,5.00,090714,,,A/00000,00/0,0/200076//FE7/"));
+
+        verifyAttribute(decoder, buffer(
+                "$CPA,40456789,083125.000,A,2232.0971,N,11400.9504,E,7.62,265.24,291117,,,A/00000,00000/0/1200//#"), Position.KEY_ALARM, Position.ALARM_POWER_CUT);
+
+        verifyPosition(decoder, buffer(
+                "$POS,216769295715,163237.000,A,3258.1738,S,02755.4350,E,0.00,215.88,100915,,,A/0000,0//232300//5b3/"),
+                position("2015-09-10 16:32:37.000", true, -32.96956, 27.92392));
+
+        verifyPosition(decoder, buffer(
+                "$POS,11023456,033731.000,A,0335.2617,N,09841.1587,E,0.00,88.12,210615,,,A/0000,0/1f8/388900//f33//"));
+
+        verifyPosition(decoder, buffer(
+                "$POS,6094,205523.000,A,1013.6223,N,06728.4248,W,0.0,99.3,011112,,,A/00000,00000/0/23895000//"));
+
+        verifyPosition(decoder, buffer(
+                "$POS,6120,233326.000,V,0935.1201,N,06914.6933,W,0.00,,151112,,,A/00000,00000/0/0/"));
+
+        verifyPosition(decoder, buffer(
+                "$POS,6002,233257.000,A,0931.0430,N,06912.8707,W,0.05,146.98,141112,,,A/00010,00000/0/5360872"));
+
+        verifyPosition(decoder, buffer(
+                "$POS,6095,233344.000,V,0933.0451,N,06912.3360,W,,,151112,,,N/00000,00000/0/1677600/"));
+
+        verifyPosition(decoder, buffer(
+                "$PHO0,6091,233606.000,A,0902.9855,N,06944.3654,W,0.0,43.8,141112,,,A/00010,00000/0/224000//"));
+
+        verifyPosition(decoder, buffer(
+                "$POS,353451000164,082405.000,A,1254.8501,N,10051.6752,E,0.00,237.99,160513,,,A/0000,0/0/55000//a71/"));
+
+        verifyPosition(decoder, buffer(
+                "$POS,012896008586486,154215.000,A,0118.0143,S,03646.9144,E,0.00,83.29,180714,,,A/0000,0/0/29200//644/"));
+
+        verifyPosition(decoder, buffer(
+                "$POS,1151000,205326.000,A,0901.3037,N,07928.2751,W,48.79,30.55,170814,,,A/00010,10000/0,0,0,0/15986500//fb8/"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Pt502ProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/Pt502ProtocolEncoderTest.java
new file mode 100644
index 000000000..a6c8bb50f
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Pt502ProtocolEncoderTest.java
@@ -0,0 +1,69 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+import static org.junit.Assert.assertEquals;
+
+public class Pt502ProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncodeCustom() throws Exception {
+
+        Pt502ProtocolEncoder encoder = new Pt502ProtocolEncoder();
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_CUSTOM);
+        command.set(Command.KEY_DATA, "#PTI300");
+
+        assertEquals("#PTI300\r\n", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodeOutputControl() throws Exception {
+
+        Pt502ProtocolEncoder encoder = new Pt502ProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_OUTPUT_CONTROL);
+        command.set(Command.KEY_INDEX, 2);
+        command.set(Command.KEY_DATA, "1");
+        
+        assertEquals("#OPC2,1\r\n", encoder.encodeCommand(command));
+
+    }
+    
+    @Test
+    public void testEncodeTimezone() throws Exception {
+
+        Pt502ProtocolEncoder encoder = new Pt502ProtocolEncoder();
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_SET_TIMEZONE);
+        command.set(Command.KEY_TIMEZONE, "GMT+8");
+
+        assertEquals("#TMZ8\r\n", encoder.encodeCommand(command));
+
+    }
+
+
+    @Test
+    public void testEncodeAlarmSpeed() throws Exception {
+
+        Pt502ProtocolEncoder encoder = new Pt502ProtocolEncoder();
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_ALARM_SPEED);
+        command.set(Command.KEY_DATA, 120);
+
+        assertEquals("#SPD120\r\n", encoder.encodeCommand(command));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Pt60ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Pt60ProtocolDecoderTest.java
new file mode 100644
index 000000000..1ba8d25c7
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Pt60ProtocolDecoderTest.java
@@ -0,0 +1,54 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Pt60ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Pt60ProtocolDecoder decoder = new Pt60ProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "@B#@|01|006|864891030184954|9425010450971470|20181213093127|2|1|"));
+
+        verifyNull(decoder, text(
+                "@B#@|01|006|864891030184954|9425010450971470|20181213093235|40412,10461,1,425,4|2|1|"));
+
+        verifyNotNull(decoder, text(
+                "@B#@|01|001|864891030184852|9425010450971470|1|84|20181205161005|40412,10461,1,425,10|2|"));
+
+        verifyPosition(decoder, text(
+                "@B#@|01|001|864891030184852|9425010450971470|1|45|20181127122717|32.701093|35.570938|1|"));
+
+        verifyNull(decoder, text(
+                "@B#@|01|003|864891030184954|9425010450971470|S6_EN_A_V1.3.7|0|66|20181122113251|40412,10461,1,425,18|49382,10461,1,425,9|40411,10461,1,425,7|2|"));
+
+        verifyNull(decoder, text(
+                "@B#@|01|033|864891030184954|9425010450971470|0|4|20181120151744|"));
+
+        verifyPosition(decoder, text(
+                "@B#@|01|001|111112222233333|8888888888888888|1|55|20160715150323|37.615124|125.48276|111.059279|49.346383|1|"));
+
+        verifyPosition(decoder, text(
+                "@B#@|01|001|111112222233333|8888888888888888|1|55|20160715150323|37.615124|125.48276|1|"));
+
+        verifyAttributes(decoder, text(
+                "@G#@,V01,14,357653051059785,9404223001501310,20180419165604,101,26,"));
+
+        verifyAttributes(decoder, text(
+                "@G#@,V01,13,357653051059785,9404223001501310,20180419112656,1180,"));
+
+        verifyPosition(decoder, text(
+                "@G#@,V01,6,111112222233333,8888888888888888,20150312010203,23.2014050;104.235212,"));
+
+        verifyNull(decoder, text(
+                "@G#@,V01,1,353882080015633,9460025014649193,"));
+
+        verifyNull(decoder, text(
+                "@G#@,V01,43,105681639001701,9460000412618231,20180410092923,5,460;0;9763;3852;-63|460;0;9763;3851;-26|460;0;9763;4080;-22|460;0;9763;3593;-18|460;0;9763;3591;-10,5,14:b8:37:26:64:88;004300680069006e0061004e00650074002d006e0047006e0058;-76|08:9b:4b:93:b5:b1;005400480049004e004b0052004100430045;-77|ec:3d:fd:c9:38:4a;004b00460052006f0075007400650072;-78|b0:d5:9d:c6:f8:82;003300360030514d8d390057006900460069002d00380032;-81|02:fa:84:3b:fa:6a;00470075006500730074005f0032002e003400470048007a;-82,"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/RaveonProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/RaveonProtocolDecoderTest.java
new file mode 100644
index 000000000..165027351
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/RaveonProtocolDecoderTest.java
@@ -0,0 +1,18 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class RaveonProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        RaveonProtocolDecoder decoder = new RaveonProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$PRAVE,0001,0001,3308.9051,-11713.1164,195348,1,10,168,31,13.3,3,-83,0,0,,1003.4*66"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/RecodaProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/RecodaProtocolDecoderTest.java
new file mode 100644
index 000000000..668879787
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/RecodaProtocolDecoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class RecodaProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        RecodaProtocolDecoder decoder = new RecodaProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "01100020480000000300000030393535360000000000000001000000303030303000000000000000000000000000000000000000006100004531313037353500ffffffffffff0000"));
+
+        verifyNull(decoder, binary(
+                "01200020100000000300000002000000"));
+
+        verifyNull(decoder, binary(
+                "0110000008000000"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/RetranslatorProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/RetranslatorProtocolDecoderTest.java
new file mode 100644
index 000000000..779e21823
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/RetranslatorProtocolDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class RetranslatorProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        RetranslatorProtocolDecoder decoder = new RetranslatorProtocolDecoder(null);
+
+        verifyPosition(decoder, binary(
+                "74000000333533393736303133343435343835004B0BFB70000000030BBB000000270102706F73696E666F00A027AFDF5D9848403AC7253383DD4B400000000000805A40003601460B0BBB0000001200047077725F657874002B8716D9CE973B400BBB00000011010361766C5F696E707574730000000001"));
+
+        verifyPosition(decoder, binary(
+                "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"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/RitiProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/RitiProtocolDecoderTest.java
new file mode 100644
index 000000000..73d07efd6
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/RitiProtocolDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class RitiProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        RitiProtocolDecoder decoder = new RitiProtocolDecoder(null);
+
+        verifyPosition(decoder, binary(
+                "3b28a2a2056315316d4000008100000000000000005f710000244750524d432c3138303535332e3030302c412c353532342e383437312c4e2c30313133342e313837382c452c302e30302c2c3032313231332c2c2c412a37340d0a00000000000000000000000000000000040404"));
+
+        verifyPosition(decoder, binary(
+                "3b2864a3056300006d40000003000000000000000000000000244750524d432c3231313734332e3030302c412c313335372e333637352c4e2c31303033362e363939322c452c302e30302c2c3031303931342c2c2c412a37380d0a00000000000000000000000000000000040404"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/RoboTrackFrameDecoderTest.java b/src/test/java/org/traccar/protocol/RoboTrackFrameDecoderTest.java
new file mode 100644
index 000000000..2e3853f86
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/RoboTrackFrameDecoderTest.java
@@ -0,0 +1,19 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class RoboTrackFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        RoboTrackFrameDecoder decoder = new RoboTrackFrameDecoder();
+
+        verifyFrame(
+                binary("00524f424f545241434b00000000000000383638323034303032323533343136313233343536373839303132312e313261000000312e353761000000312e3030000000003e"),
+                decoder.decode(null, null, binary("00524f424f545241434b00000000000000383638323034303032323533343136313233343536373839303132312e313261000000312e353761000000312e3030000000003e")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/RoboTrackProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/RoboTrackProtocolDecoderTest.java
new file mode 100644
index 000000000..0c969ab68
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/RoboTrackProtocolDecoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class RoboTrackProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        RoboTrackProtocolDecoder decoder = new RoboTrackProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "00524f424f545241434b00000000000000383638323034303032323533343136313233343536373839303132312e313261000000312e353761000000312e3030000000003e"));
+
+        verifyPosition(decoder, binary(
+                "03e020bb5a034409034862120210a9e105000000000000b9"));
+
+        verifyPosition(decoder, binary(
+                "03f120bb5a30460903426312021798e105000000000000cd"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/RuptelaProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/RuptelaProtocolDecoderTest.java
new file mode 100644
index 000000000..12f63ef7d
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/RuptelaProtocolDecoderTest.java
@@ -0,0 +1,48 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class RuptelaProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        RuptelaProtocolDecoder decoder = new RuptelaProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "002e000315bc70d3e2ff0f4f42443130302e30312e30382e30300000c2b30ea77e430000601b000001f40000003c00144aa0"));
+
+        verifyAttributes(decoder, binary(
+                "0011000315A07F440B1D07534554494f20636f6e66696775726174696f6e2064617461206f6b341C"));
+
+        verifyAttributes(decoder, binary(
+                "0044000313612d76c5cb0744494e313d312c44494e323d302c44494e333d302c44494e343d302c444f5554313d312c444f5554323d312c41494e313d31372c41494e323d3236ac80"));
+
+        verifyPositions(decoder, binary(
+                "000B00000B1A29F64B1A0902FF4E9CAF2C07D608F11A1480BA015030303130FF4E9CAF2C07D608F11A1480BA0250303031318C91"));
+
+        verifyPositions(decoder, binary(
+                "01a4000315bc70f9b69244000458068f4a0030000d11398a1c0c19fd056524040b000c0a00090c0005010031f40032fd0033f200ce47002400002500001c010199000195010196010086000900aa0000001e0ff000d3ffff0043ffff01930000019200000194000002220000022300000200300000000200af000e872401008e000000000000000058068f4a0031000d11398a1c0c19fd056524040b000c0a00090400870000880000a90000820010008b0002021e0000021f0000021d0000021c0000022400000225000000890000008505f00220000002210000008300000084000002260000022700000228000003008a00000000008d00000000008c000000000058068f4a0032000d11398a1c0c19fd056524040b000c0a000905019f01005800001b1f00ad0000cfb10b02290000022a0000022b0000022c0000022d00000012000000130000001d367400c52f8000740055023e0502060097000000000096000058520041007746cb00d0000003f1005c0007c21b0072001864880058068f4a0033000d11398a1c0c19fd056524040b000c0a000900000001008e0000000000000000e815"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+        
+        verifyPositions(decoder, binary(
+                "0050000310f5615f419c0100015613d8ed0000fff5b37a035af37801e700000900000d07071b0c020003001c01202cad000500064302a81d33e61e100116317cd3ffff174ad60241000077fa960000f232003c2e"));
+
+        verifyPositions(decoder, binary(
+                "00560003116e7438a7a50100015565cbb9000020fd21300f113f4600005f000600090d090805011b13cf00020003001c012029ad00041d31dd1e0ebd160000c50000047200000000d0000000004100016a2a960000a5a300c9ee"));
+
+        verifyPositions(decoder, binary(
+                "00a10003116e7438a7a5010002553dddbe000020fddaff0f12289b007200000600000c070805011b18cf00020003001c01201dad01041d32d81e0d7d160000c50000047200000000d000000000410000b1ae960000a5a300553dddd4000020fdd96f0f122bfe005c16f80700050b090805011b18cf00020003001c01201ead01041d338a1e0d8d160000c50000047200000000d000000000410000b1bd960000a5a3001681"));
+
+        verifyPositions(decoder, binary(
+                "007900000b1a2a5585c30100024e9c036900000f101733208ff45e07b31b570a001009090605011b1a020003001c01ad01021d338e16000002960000601a41014bc16d004e9c038400000f104fdf20900d20075103b00a001308090605011b1a020003001c01ad01021d33b116000002960000601a41014bc1ea0028f9"));
+
+        verifyPositions(decoder, binary(
+                "009200000c07a6bacd4701000552db5cc20000187b8b251ace478e087c044c0a000009070000000052db5cfe0000187b8ab01ace47190879044c0900000b070000000052db5d3a0000187b8b251ace474b089d044c09000009070000000052db5d760000187b8b9a1ace475c08cd044c08000009070000000052db5db20000187b8b141ace46e708b3044c08000009070000000041cb"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/RuptelaProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/RuptelaProtocolEncoderTest.java
new file mode 100644
index 000000000..8a00caa09
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/RuptelaProtocolEncoderTest.java
@@ -0,0 +1,23 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+public class RuptelaProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        RuptelaProtocolEncoder encoder = new RuptelaProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_CUSTOM);
+        command.set(Command.KEY_DATA, " Setio 2,1");
+
+        verifyCommand(encoder, command, binary("000b6c20536574696F20322C31eb3e"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/SabertekFrameDecoderTest.java b/src/test/java/org/traccar/protocol/SabertekFrameDecoderTest.java
new file mode 100644
index 000000000..7a42a71a0
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/SabertekFrameDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assert.assertEquals;
+
+public class SabertekFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        SabertekFrameDecoder decoder = new SabertekFrameDecoder();
+
+        assertEquals(
+                binary("2c3939393939393939392c332c34302c36352c372c302c312c2d32352e3738313636362c32382e3235343730322c34302c3236382c313431342c382c35353632332c"),
+                decoder.decode(null, null, binary("022c3939393939393939392c332c34302c36352c372c302c312c2d32352e3738313636362c32382e3235343730322c34302c3236382c313431342c382c35353632332c030d0a")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/SabertekProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/SabertekProtocolDecoderTest.java
new file mode 100644
index 000000000..20b02841e
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/SabertekProtocolDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class SabertekProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        SabertekProtocolDecoder decoder = new SabertekProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                ",999999999,3,40,65,7,0,1,-25.781666,28.254702,40,268,1414,8,55623,"));
+
+        verifyPosition(decoder, text(
+                ",999999999,4,356495040613400,89270200120171498287,+27821234123,20180525145412,60,75,15,1,1,-25.781666,28.254702,40,268,1414,8,24844,"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/SanavProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/SanavProtocolDecoderTest.java
new file mode 100644
index 000000000..36fd7ecba
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/SanavProtocolDecoderTest.java
@@ -0,0 +1,37 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class SanavProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        SanavProtocolDecoder decoder = new SanavProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "imei=353197040023431&rmc=$GPRMC,015258.000,A,2457.8101,N,12125.5393,E,0.00,0.00,210111,,*18,AUTO,0300,2.1,10,466,97,34E7,3391,74,466,9 7,3F2D,3391,65,466,97,39C9,3391,79,466,97,3F2C,3391,81,466,97,0000,00 00,83,466,97,0000,0000,85,466,97,0000,0000,85,1,24"));
+
+        verifyPosition(decoder, text(
+                "imei=1234567890&rmc=$GPRMC,091950.00,V,5300.10000,N,00900.14000,E,0.160,,200513,,,A*68,STOP,V3.872;67%,S4,H8.3,D2.38"));
+        
+        verifyPosition(decoder, text(
+                "imei=352024028982787&rmc=$GPRMC,103048.000,A,4735.0399,N,01905.2895,E,0.00,0.00,171013,,*05,AUTO-4095mv"),
+                position("2013-10-17 10:30:48.000", true, 47.58400, 19.08816));
+
+        verifyPosition(decoder, text(
+                "imei:352024028980000rmc:$GPRMC,093604.354,A,4735.0862,N,01905.2146,E,0.00,0.00,171013,,*09,AUTO-4103mv"));
+
+        verifyPosition(decoder, text(
+                "imei:352024027800000rmc:$GPRMC,000025.000,A,4735.0349,N,01905.2899,E,0.00,202.97,171013,,*03,3950mV,AUTO"));
+
+        verifyPosition(decoder, text(
+                "imei:352024020976845rmc:$GPRMC,000201.000,A,4655.7043,N,01941.3796,E,0.54,159.14,171013,,,A*65,AUTO"));
+
+        verifyPosition(decoder, text(
+                "imei:352024020976845rmc:$GPRMC,000201.000,A,4655.7043,N,01941.3796,E,0.54,159.14,171013,,,A*65,AUTO"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/SatsolProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/SatsolProtocolDecoderTest.java
new file mode 100644
index 000000000..45e919bbb
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/SatsolProtocolDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class SatsolProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        SatsolProtocolDecoder decoder = new SatsolProtocolDecoder(null);
+
+        verifyPositions(decoder, binary(
+                "f0e1bf4cb2ec1600e1005f8791e901000000c959515c2cc24a03aeadcd010e01a800250001090201878e92e901000000cb59515c2dc24a03b8adcd018801a8001d0001080201325993e901000000cc59515c2fc24a03bfadcd01ab01a800220001080201dd8194e901000000cd59515c32c24a03ceadcd015801a8002500010802015f3795e905000900ce59515c32c24a03d8adcd01f600a700250001091401000000000000000000863496e901000000cf59515c34c24a03ddadcd019b00a700280001090201714197e904000600cf59515c34c24a03ddadcd019b00a7002800010a1401becd07001901"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/SigfoxProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/SigfoxProtocolDecoderTest.java
new file mode 100644
index 000000000..48adb0ccb
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/SigfoxProtocolDecoderTest.java
@@ -0,0 +1,19 @@
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.HttpMethod;
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class SigfoxProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        SigfoxProtocolDecoder decoder = new SigfoxProtocolDecoder(null);
+
+        verifyPosition(decoder, request(HttpMethod.POST, "/",
+                buffer("%7B++%22device%22%3A%222BF839%22%2C++%22time%22%3A1510605882%2C++%22duplicate%22%3Afalse%2C++%22snr%22%3A45.61%2C++%22station%22%3A%2235A9%22%2C++%22data%22%3A%2200bd6475e907398e562d01b9%22%2C++%22avgSnr%22%3A45.16%2C++%22lat%22%3A-38.0%2C++%22lng%22%3A145.0%2C++%22rssi%22%3A-98.00%2C++%22seqNumber%22%3A228+%7D=")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/SiwiProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/SiwiProtocolDecoderTest.java
new file mode 100644
index 000000000..3a91d8482
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/SiwiProtocolDecoderTest.java
@@ -0,0 +1,36 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class SiwiProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        SiwiProtocolDecoder decoder = new SiwiProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$SIWI,9803932,23992,E,0,,0,1,1,0,5055,0,5,A,22.289887,70.807192,152,168,102922,090317,28,1,12,5,4098,1,0,13,0,0,0,1.0,3.1CHKS_4.82,0!"));
+
+        verifyPosition(decoder, text(
+                "$SIWI,2845,1320,Q,10,airtelgprs.com,1,1,0,0,876578,43,9,A,19.0123456,72.65347,45,0,055929,071107,22,5,1,0,3700,1210,0,2500,1230,321,0,1.1,4.0,1!"));
+
+        verifyPosition(decoder, text(
+                "$SIWI,9803849,953,R,9,,0,1,1,0,0,0,8,A,19.066145,73.002278,213,178,122738,210217,28,5,12,6,4066,1,0,2,0,0,0,1.0,3.1CHKS_4.82,0"));
+
+        verifyPosition(decoder, text(
+                "$EIT,9803849,953,R,9,,0,1,1,0,0,0,8,A,19.066145,73.002278,213,178,122738,210217,28,5,12,6,4066,1,0,2,0,0,0,1.0,3.1CHKS_4.82,0"));
+
+        verifyPosition(decoder, text(
+                "$SIWI,9803849,954,E,0,,0,1,1,0,0,0,0,V,0.000000,0.000000,0,0,122855,210217,29,5,12,5,4104,1,0,2,0,0,0,1.0,3.1CHKS_4.82,0"));
+
+        verifyPosition(decoder, text(
+                "$SIWI,2845,1320,A,0,,1,1,0,0,876578,43,10,A,19.0123456,72.65347,45,0,055929,071107,22,5,1,0,3700,1210,0,2500,1230,321,0,1.1,4.0,1!"));
+
+        verifyPosition(decoder, text(
+                "$SIWI,9803849,956,E,0,,0,1,1,0,0,0,3,V,19.066935,73.003383,0,111,123037,210217,28,5,12,5,4071,1,0,2,0,0,0,1.0,3.1CHKS_4.82,0"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/SkypatrolProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/SkypatrolProtocolDecoderTest.java
new file mode 100644
index 000000000..bc2dac7e9
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/SkypatrolProtocolDecoderTest.java
@@ -0,0 +1,34 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class SkypatrolProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        SkypatrolProtocolDecoder decoder = new SkypatrolProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "000a02171101303131373232303031333537393833060200000006202020202020202020312020202020202030313137323230303133353739383320"));
+
+        verifyNull(decoder, binary(
+                "000402171101303131373232303031333537393833060200081046202020202020202020392020202020202030313137323230303133353739383320244750524d432c3134303931372e30302c412c333330322e3230313132352c532c30373133352e3837383338332c572c302e302c302e302c3036303731372c322e382c572c412a32370d0a00"));
+
+        verifyPosition(decoder, binary(
+                "0005021004FFFFFFFF0000000D313134373735383300CB000000000E11070C010184D032FB3841370000000016072B000017050032000000000000024E0C071116072C105900050000000000050000000000050000000003100260B7363B6306C11A00B73637F206BF19B73637F106B50EB73638B106BB0BB7363B6106B80AB73637F306B709000000000000000000"));
+
+        verifyNull(decoder, binary(
+                "000500030101383637383434303031373832333336420102000c0000fa07b5e101876c5b0e0a111606131c1b5e"));
+
+        // Enfora TT8750
+        verifyNull(decoder, binary(
+                "000502000000f1143035303031393031d1df002f00000d0187120115e556ff762aa90000000000aae40005d2000ee1bc0e010a042530000000000000070004000002233c096c00ee2a00233c008500f022233c0b0500f21d233c000000fb23000000000000000000000000000000000000000000000000000000"));
+
+        verifyNull(decoder, binary(
+                "00040200202020202020202020382020202020202030313137323230303131383531373820313220244750524d432c3232343833392e30302c412c303332382e3433383830362c4e2c30373633312e3630373731372c572c302e302c302e302c3139303731342c332e382c452c412a32420d0a00"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/SmartSoleProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/SmartSoleProtocolDecoderTest.java
new file mode 100644
index 000000000..183af899b
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/SmartSoleProtocolDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class SmartSoleProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        SmartSoleProtocolDecoder decoder = new SmartSoleProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "#GTXRP=359366080000385,8,180514200051,34.041981,-118.255806,60,1,1,7,1.80,180514200051,4.16,11"));
+
+        verifyPosition(decoder, text(
+                "#GTXRP=359372090000290,11,180919105751,46.477173,6.445475,389,0,0,0,1.08,180919105751,4.10,10"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/SmokeyProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/SmokeyProtocolDecoderTest.java
new file mode 100644
index 000000000..c2d74b433
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/SmokeyProtocolDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class SmokeyProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        SmokeyProtocolDecoder decoder = new SmokeyProtocolDecoder(null);
+
+        verifyAttributes(decoder, binary(
+                "534d0300865101019383025f0403000000000b86250200000c0000028f000102f8cc0900127f08"));
+
+        verifyAttributes(decoder, binary(
+                "534d0300865101019383025f0403000000000bcf260200000c0000028f000102f8cc090012360b"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/SpotProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/SpotProtocolDecoderTest.java
new file mode 100644
index 000000000..7191f31ef
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/SpotProtocolDecoderTest.java
@@ -0,0 +1,19 @@
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.HttpMethod;
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class SpotProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        SpotProtocolDecoder decoder = new SpotProtocolDecoder(null);
+
+        verifyPositions(decoder, request(HttpMethod.POST, "/",
+                buffer("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n<messageList xmlns=\"http://v2.shared.globalstar.com\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://v2.shared.globalstar.com http://share.findmespot.com/shared/schema/spotXml-v2.xsd\">\n    <header>\n        <totalCount>1</totalCount>\n        <mode>LIVE</mode>\n    </header>\n    <message>\n        <id>891801957</id>\n        <esn>0-3112123</esn>\n        <esnName>0-3112123a</esnName>\n        <messageType>NEWMOVEMENT</messageType>\n        <messageDetail> SPOT Trace has detected that the asset has moved.</messageDetail>\n        <timestamp>2017-12-27T13:19:38.000Z</timestamp>\n        <timeInGMTSecond>1514380778</timeInGMTSecond>\n        <latitude>-1.28781</latitude>\n        <longitude>-47.93042</longitude>\n        <batteryState>GOOD</batteryState>\n    </message>\n</messageList>")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/StarLinkProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/StarLinkProtocolDecoderTest.java
new file mode 100644
index 000000000..70e173284
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/StarLinkProtocolDecoderTest.java
@@ -0,0 +1,54 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class StarLinkProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        StarLinkProtocolDecoder decoder = new StarLinkProtocolDecoder(null);
+
+        verifyAttributes(decoder, text(
+                "$SLU068328,06,55,170518122023,16,,,,,,000000,1,1,0,0,0,0,0,0,10443,32722,12.664,03.910,,0,0,,01000001FDB3A9*BF"));
+
+        verifyAttributes(decoder, text(
+                "$SLU068328,06,56,170518122023,20,,,,,,000000,1,1,0,0,0,0,0,0,10443,32722,12.664,03.910,,0,0,2,01000001FDB3A9,00000000000000000000*D9"));
+
+        verifyAttributes(decoder, text(
+                "$SLU068328,06,57,170518122038,01,,,,,,000000,1,1,0,0,1,0,0,0,10443,32722,12.669,03.910,,0,0,0,99*6E"));
+
+        verifyAttributes(decoder, text(
+                "$SLU068328,06,58,170518122045,19,,,,,,000000,1,1,0,0,1,0,0,0,10443,32722,12.678,03.910,,0,0*7C"));
+
+        verifyAttributes(decoder, text(
+                "$SLU068328,06,59,170518122054,16,,,,,,000000,1,1,0,0,0,0,0,0,10443,32723,12.678,03.910,,0,0,01000001FDB3A9,01000001ACE0A6*BF"));
+
+        verifyPosition(decoder, text(
+                "$SLU031B2B,06,622,170329035057,01,170329035057,+3158.0018,+03446.6968,004.9,007,000099,1,1,0,0,0,0,0,0,,,14.176,03.826,,1,1,1,4*B0"));
+
+        verifyPosition(decoder, text(
+                "$SLU031B2B,06,624,170329035143,01,170329035143,+3158.0171,+03446.6742,006.8,326,000099,1,1,0,0,0,0,0,0,10452,8723,14.212,03.827,,1,1,1,4*6D"));
+
+        verifyPosition(decoder, text(
+                "$SLU0330D5,06,3556,170314063523,19,170314061634,+3211.7187,+03452.8106,000.0,332,015074,1,1,0,0,0,0,0,0,10443,32722,12.870,03.790,,0,0*FC"));
+
+        verifyPosition(decoder, text(
+                "$SLU0330D5,06,3555,170314063453,20,170314061634,+3211.7187,+03452.8106,000.0,332,015074,1,1,0,0,0,0,0,0,10443,32722,12.838,03.790,,0,0,1,,1122*74"));
+
+        verifyPosition(decoder, text(
+                "$SLU006968,06,375153,170117051824,01,170117051823,+3203.2073,+03448.1360,000.0,300,085725,1,1,0,0,0,0,0,0,10422,36201,12.655,04.085,,0,0,0,99*45"));
+
+        verifyPosition(decoder, text(
+                "$SLU006968,06,375155,170117052615,24,170117052613,+3203.2079,+03448.1369,000.0,300,085725,1,1,0,0,0,0,0,0,10422,36201,14.290,04.083,,1,1*5B"));
+
+        verifyPosition(decoder, text(
+                "$SLU006968,06,375156,170117052616,34,170117052614,+3203.2079,+03448.1369,000.0,300,085725,1,1,0,0,0,0,0,0,10422,36201,14.277,04.084,1,1,1,1*F3"));
+
+        verifyPosition(decoder, text(
+                "$SLU006968,06,375154,170117052613,04,170117052612,+3203.2079,+03448.1369,000.0,300,085725,1,1,0,0,0,0,0,0,10422,36201,14.287,04.084,,1,0*5B"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Stl060ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Stl060ProtocolDecoderTest.java
new file mode 100644
index 000000000..e2be2028e
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Stl060ProtocolDecoderTest.java
@@ -0,0 +1,28 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Stl060ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Stl060ProtocolDecoder decoder = new Stl060ProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$1,357804048043099,D001,AP29AW0963,23/02/14,14:06:54,17248488N,078342226E,0.08,193.12,1,1,1,1,1,A"),
+                position("2014-02-23 14:06:54.000", true, 17.41415, 78.57038));
+
+        verifyPosition(decoder, text(
+                "$1,357804048043099,D001,AP29AW0963,12/05/14,07:39:57,1724.8564N,07834.2199E,0.00,302.84,1,1,1,1,1,A"));
+        
+        verifyPosition(decoder, text(
+                "$1,357804047969310,D001,AP29AW0963,01/01/13,13:24:47,1723.9582N,07834.0945E,00100,010,0,0,0,0,0,A,"));
+
+        verifyPosition(decoder, text(
+                "$1,357804047969310,D001,AP29AW0963,01/01/13,13:24:47,1723.9582N,07834.0945E,00100,010,0,0,0,0,0,0008478660,1450,40,34,0,0,0,A"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/SuntechProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/SuntechProtocolDecoderTest.java
new file mode 100644
index 000000000..355cda783
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/SuntechProtocolDecoderTest.java
@@ -0,0 +1,167 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Position;
+
+public class SuntechProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecodeTemperature() throws Exception {
+
+        SuntechProtocolDecoder decoder = new SuntechProtocolDecoder(null);
+
+        decoder.setHbm(true);
+        decoder.setIncludeAdc(true);
+        decoder.setIncludeTemp(true);
+
+        verifyPosition(decoder, text(
+                "ST300STT;205173382;07;564;20160322;23:23:18;232e19;+19.288278;-099.128750;000.122;000.00;9;1;478391;11.53;000100;1;9498;079324;4.3;1;0.00;0.00;0.00;00000000000000;0;2898E16006000058:-20.8;2861626006000039:+2.5;:"));
+
+        verifyPosition(decoder, text(
+                "ST300EVT;205173382;07;564;20160322;23:23:18;232e19;+19.288278;-099.128750;000.122;000.00;9;1;478391;11.53;000100;2;1;9498;079324;4.3;1;0.00;0.00;0.00;00000000000000;0;2898E16006000058:-20.8;2861626006000039:+2.5;:"));
+
+        verifyPosition(decoder, text(
+                "ST600STT;008349958;35;523;20181112;00:49:30;0bf10d4e;334;20;2f19;22;+20.552718;-100.824478;050.021;095.41;12;1;1303603;14.30;10000000;4;8911;001987;4.1;0;0.00;;;;00000000000000;0;2826C8A70800000C:+26.6;:;:"));
+
+    }
+
+    @Test
+    public void testDecodeHours() throws Exception {
+
+        SuntechProtocolDecoder decoder = new SuntechProtocolDecoder(null);
+
+        decoder.setHbm(true);
+
+        verifyPosition(decoder, text(
+                "ST300STT;007238270;40;313;20190220;12:05:04;c99e48;+04.644623;-074.076922;010.390;202.77;20;1;997100;14.10;100000;2;8384;003634;4.1;1"));
+
+        verifyPosition(decoder, text(
+                "ST300STT;109002029;08;1080;20190220;13:00:55;85405;+04.645710;-074.078525;007.760;005.19;10;1;6520802;13.86;100100;4;1716;0000039863;4.1;1;0.00;0000;0000;0;0"));
+
+        verifyAttribute(decoder, text(
+                "ST300ALT;007239104;40;313;20190112;01:07:16;c99139;+04.703287;-074.148897;000.000;189.72;21;1;425512;12.61;100000;33;003188;4.1;1"),
+                Position.KEY_HOURS, 3188 * 60000L);
+
+    }
+
+    @Test
+    public void testDecode() throws Exception {
+
+        SuntechProtocolDecoder decoder = new SuntechProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "SA200STT;608945;129;20190215;15:04:53;3dce071558;+22.006721;-098.771016;001.198;000.00;11;1;2632589;12.21;010000;1;3211"));
+
+        verifyPosition(decoder, text(
+                "ST410STT;007272376;408;01;10217;732;103;-87;51511;1;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;3.8;1;2503;6;20181031;20:12:58;+04.741277;-074.048238;052.375;189.87;20;1"));
+
+        verifyPosition(decoder, text(
+                "ST410STT;007272376;408;01;21651;732;123;-65;1824;1;21654;732;123;1824;0;0;22542;732;123;1824;0;0;21656;732;123;1824;0;0;21655;732;123;1824;0;0;22541;732;123;1824;0;0;0;0;0;0;0;0;3.7;1;0156;1;20180816;05:18:52;+04.722322;-074.052776;000.074;000.00;10;1"));
+
+        verifyPosition(decoder, text(
+                "ST600STT;008084783;20;419;20180308;18:00:36;0032cc3e;736;3;445c;41;-16.530023;-068.084267;018.640;267.99;10;1;11655;13.33;100000;2;0336;000061;4.5;0;0.00"));
+
+        verifyPosition(decoder, text(
+                "ST600STT;107850496;20;419;20180227;14:30:45;00462b08;736;3;4524;50;-16.479091;-068.119119;000.346;000.00;4;1;0;13.89;000000;1;0223;000003;0.0;0;0.00"));
+
+        verifyPosition(decoder, text(
+                "ST600STT;100850000;01;010;20081017;07:41:56;0000004f;450;20;0023;24;+37.478519;+126.886819;000.012;000.00;9;1;0;15.30;00110000;1;0072;0;4.5;1;12.35"));
+
+        verifyPosition(decoder, text(
+                "STT;100850000;3FFFFF;26;010;1;20161117;08:37:39;0000004F;450;0;0014;20;+37.479323;+126.887827;62.03;65.43;10;1;00000101;00001000;1;2;0492"));
+
+        verifyPosition(decoder, text(
+                "STT;6009999006;3FFFFF;26;398;0;20170827;20:04:37;087d4760;310;410;0ba0;23;+40.123420;-074.995971;000.031;000.00;8;1;00000001;00000000;1;1;0006"));
+
+        verifyPosition(decoder, text(
+                "ST500STT;205450135;07;843;20170816;23:24:45;+19.338432;-099.179817;000.283;000.00;6;1;141121;12.89;0;0;1;4659;002.795;0;001.891;611;4.0"));
+
+        verifyPosition(decoder, text(
+                "ST300STT;205170303;12;561;20170816;09:10:34;173f53;+19.082370;-098.214287;006.776;000.00;0;0;52982186;12.75;100000;2;6328;155747;4.2;1;0.00;0;0.00;0.00;00000000000000;0;28F2B7600600005D:+5.2;:;:"));
+
+        verifyPosition(decoder, text(
+                "ST910;Location;205576803;500;20170319;12:18:17;-22.846014;-046.322176;000.000;000.00;0;3.8;0;1;9159"));
+
+        verifyPosition(decoder, text(
+                "ST910;Emergency;205576803;500;20170319;12:15:22;-22.846014;-046.322176;000.000;000.00;0;2"));
+
+        verifyPosition(decoder, text(
+                "ST910;Location;205576803;500;20170312;12:56:52;-22.846014;-046.322176;000.000;000.00;0;3.8;0;0;0019"));
+
+        verifyPosition(decoder, text(
+                "ST300STT;100850000;01;010;20081017;07:41:56;00100;+37.478519;+126.886819;000.012;000.00;9;1;0;15.30;001100;1;0072;0;4.5;1;1750;012497F1160000;1;004f001454;450;00;-320;20;255;1"));
+
+        verifyPosition(decoder, text(
+                "ST300STT;205589913;05;527;20170304;02:21:33;be139;-25.398868;-049.325636;000.476;000.00;6;1;427;12.57;100000010;1;0172;017.159;0;002.327;12;4.0"));
+
+        verifyPosition(decoder, text(
+                "SA200STT;638947;803;20170117;07:40:44;5d309;-01.287213;-047.917462;000.035;000.00;10;1;2036194;12.57;000000;1;0376;010360;4.2;1"));
+
+        verifyPosition(decoder, text(
+                "ST300ALT;205174410;14;712;20110101;00:00:07;00000;+20.593923;-100.336716;000.000;000.00;0;0;0;16.57;000000;81;000000;4.0;0;0.00;0000;0000;0;0"));
+
+        verifyNull(decoder, text(
+                "SA200ALV;317652"));
+
+        verifyPosition(decoder, text(
+                "ST910;Alert;123456;410;20141018;18:30:12;+37.478774;+126.889690;000.000;000.00;0;4.0;1;6002"),
+                position("2014-10-18 18:30:12.000", false, 37.47877, 126.88969));
+
+        verifyPosition(decoder, text(
+                "ST910;Alert;123456;410;20141018;18:30:12;+37.478774;+126.889690;000.000;000.00;0;4.0;1;6002;02;0;0310000100;450;01;-282;70;255;3;0"));
+
+        verifyPosition(decoder, text(
+                "SA200STT;317652;042;20120718;15:37:12;16d41;-15.618755;-056.083241;000.024;000.00;8;1;41548;12.17;100000;2;1979"),
+                position("2012-07-18 15:37:12.000", true, -15.61876, -56.08324));
+
+        verifyPosition(decoder, text(
+                "SA200STT;317652;042;20120721;19:04:30;16d41;-15.618743;-056.083221;000.001;000.00;12;1;41557;12.21;000000;1;3125"));
+
+        verifyPosition(decoder, text(
+                "SA200STT;317652;042;20120722;00:24:23;4f310;-15.618767;-056.083214;000.011;000.00;11;1;41557;12.21;000000;1;3205"));
+
+        verifyPosition(decoder, text(
+                "SA200STT;315198;042;20120808;20:37:34;3fac25;-15.618731;-056.083216;000.007;000.00;12;1;48;0.00;000000;1;0127"));
+
+        verifyPosition(decoder, text(
+                "SA200STT;315198;042;20120809;13:43:34;4f310;-15.618709;-056.083223;000.025;000.00;8;1;49;12.10;100000;2;0231"));
+
+        verifyPosition(decoder, text(
+                "SA200EMG;317652;042;20120718;15:35:41;16d41;-15.618740;-056.083252;000.034;000.00;8;1;41548;12.17;110000;1"));
+
+        verifyPosition(decoder, text(
+                "SA200ALT;317652;042;20120829;14:25:58;16d41;-15.618770;-056.083242;000.029;000.00;0;0;2404240;0.00;000000;10"));
+
+        verifyPosition(decoder, text(
+                "SA200STT;430070;133;20130615;22:22:32;151347;+02.860514;-060.653351;000.003;000.00;12;1;0;12.39;000000;1;0208"));
+
+        verifyPosition(decoder, text(
+                "ST910;Location;344506;017;20130727;14:10:00;-25.398714;-049.296818;000.187;000.00;1;4.32;1;1;0001"));
+
+        verifyPosition(decoder, text(
+                "ST300STT;205027329;03;374;20150108;17:54:42;177b38;-23.566052;-046.477588;000.000;000.00;0;0;0;12.11;000000;1;0312"));
+        
+        verifyPosition(decoder, text(
+                "ST910;Emergency;205283272;500;20150716;19:12:01;-23.659019;-046.695403;000.602;000.00;0;4.2;1;1;02;10820;2fdb090736;724;05;0;2311;255;0;100"));
+
+        decoder.setProtocolType(1);
+
+        verifyPosition(decoder, text(
+                "ST910;Location;907510186;552;20180504;23:15:45;3af54e5331;+19.301833;-099.190657;000.246;000.00;1;28462;80;1;0;0423;02;334;05;-215;20051;1;4;100"));
+
+        verifyPosition(decoder, text(
+                "ST910;Alert;485195;20170409;22:37:41;3be0133057;+24.882410;-107.509152;000.070;000.00;1;286734;72;02;295;05;-415;4912;255;10;10"));
+
+        verifyPosition(decoder, text(
+                "ST910;Location;485195;528;20170410;01:18:57;f1dd134840;+24.787139;-107.434679;000.020;000.00;1;286734;100;1;0;0188;02;295;05;-339;4936;255;4;74"));
+
+        verifyPosition(decoder, text(
+                "ST910;Location;560266;500;20161207;21:33:11;af910be101;-25.504234;-049.278003;000.080;000.00;1;10054889;70;1;1;1311;02;724;06;-317;3041;2;10;92"));
+
+        verifyPosition(decoder, text(
+                "ST910;Emergency;238569;528;20170403;00:02:09;7574160020;+19.661292;-099.144473;000.176;000.00;1;228638;1"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/SupermateProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/SupermateProtocolDecoderTest.java
new file mode 100755
index 000000000..2a7ab2dee
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/SupermateProtocolDecoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class SupermateProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        SupermateProtocolDecoder decoder = new SupermateProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "2:359672050130411:1:*,00000000,XT,A,10031b,140b28,80ad4c72,81ba2d2c,06ab,238c,020204010000,12,0,0000,0003e6"));
+
+        verifyPosition(decoder, text(
+                "2:359672050130411:2:*,00000000,UP,A,10031b,140a1c,80ad4bf6,81ba2dc3,0000,0000,020204000000,14,0,0000,0003e6"));
+
+        verifyPosition(decoder, text(
+                "2:359672050130411:1:*,00000000,BJ,A,10031b,140c2f,80ad5012,81ba1f27,0f4c,2e18,020204014000,14,0,0000,0003ed"));
+
+    }
+
+}
\ No newline at end of file
diff --git a/src/test/java/org/traccar/protocol/SviasProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/SviasProtocolDecoderTest.java
new file mode 100644
index 000000000..f7b15ca2e
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/SviasProtocolDecoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class SviasProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        SviasProtocolDecoder decoder = new SviasProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "[7061,3041,57,20324277,710,40618,141342,-93155840,-371754060,0,20469,0,16,1,0,0,11323,100,9,,32,4695"));
+
+        verifyPosition(decoder, text(
+                "[7041,3041,8629,20856286,710,60618,201027,-92268040,-371346250,7994,31844,38271,16,1,0,0,13416,100,0,0,5089"));
+
+        verifyPosition(decoder, text(
+                "[7051,3041,15270,30179873,710,70618,40335,-94679080,-360604930,0,35454,23148,0,1,0,0,12542,100,13,32,4971"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/T55ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/T55ProtocolDecoderTest.java
new file mode 100644
index 000000000..f21acdee7
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/T55ProtocolDecoderTest.java
@@ -0,0 +1,126 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class T55ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        T55ProtocolDecoder decoder = new T55ProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "$DEVID,0x0103846677F21422*41"));
+
+        verifyPosition(decoder, text(
+                "660420156A0066AA$GPRMC,122806.0,A,0119.212178,N,10355.000942,E,0.0,,230119,0.0,E,A*27"));
+
+        verifyNull(decoder, text(
+                "$IMEI=355797031609284"));
+
+        verifyNull(decoder, text(
+                "086415031C20"));
+
+        verifyNull(decoder, text(
+                "358244017671308"));
+
+        verifyPosition(decoder, text(
+                "$GPGGA,082350.000,5355.0314,N,01044.1271,E,1,10,0.7,-46.0,M,0.0,M,0.0,0000"));
+
+        verifyPosition(decoder, text(
+                "$GPRMC,082350.000,A,5355.0314,N,01044.1271,E,26.20,184.27,080518,,"));
+
+        verifyPosition(decoder, text(
+                "$GPRMC,192350.000,V,0000.0000,N,00000.0000,E,,,110318,,*12"));
+
+        verifyPosition(decoder, text(
+                "$GPRMC,073446.000,A,1255.5125,N,07738.2948,E,0.00,0.53,080316,D*71,11,865733027593268,1,090,086,123,456,789,987,12345"));
+
+        verifyNotNull(decoder, text(
+                "$GPRMC,161223.000,A,2517.0545,S,05739.1788,W,0.0,0.0,011196,,,A*61"));
+
+        verifyPosition(decoder, text(
+                "4711/022789000688081/$GPRMC,133343,A,5308.56325,N,1029.12850,E,0.000000,0.000000,290316,,*2A"));
+
+        verifyPosition(decoder, text(
+                "$GPRMC,073446.000,A,1255.5125,N,07738.2948,E,0.00,0.53,080316,D*71,11,865733027593268,1,090,086"));
+
+        verifyNull(decoder, text(
+                "$GPFID,ID123456ABC"));
+
+        verifyNull(decoder, text(
+                "$PGID,359853000144328*0F"));
+
+        verifyNull(decoder, text(
+                "$PCPTI,CradlePoint Test,184453,184453.0,6F*57"));
+        
+        verifyNull(decoder, text(
+                "IMEI 351467108700000"));
+        
+        verifyPosition(decoder, text(
+                "$GPRMC,012006,A,4828.10,N,1353.52,E,0.00,0.00,180915,020.3,E*42"));
+
+        verifyPosition(decoder, text(
+                "$GPRMC,094907.000,A,6000.5332,N,03020.5192,E,1.17,60.26,091111,,*33"));
+
+        verifyPosition(decoder, text(
+                "$GPRMC,115528.000,A,6000.5432,N,03020.4948,E,,,091111,,*06"));
+        
+        verifyPosition(decoder, text(
+                "$GPRMC,064411.000,A,3717.240078,N,00603.046984,W,0.000,1,010313,,,A*6C"));
+        
+        verifyPosition(decoder, text(
+                "$GPGGA,000000.0,4337.200755,N,11611.955704,W,1,05,3.5,825.5,M,-11.0,M,,*6F"));
+        
+        verifyPosition(decoder, text(
+                "$GPGGA,000000,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47"));
+        
+        verifyPosition(decoder, text(
+                "$GPRMA,V,0000.00,S,00000.00,E,,,00.0,000.,11.,E*7"));
+        
+        verifyPosition(decoder, text(
+                "$TRCCR,20140101001122.333,V,60.0,-100.0,1.1,2.2,3.3,4.4,*00"));
+        
+        verifyPosition(decoder, text(
+                "$TRCCR,20140111000000.000,A,60.000000,60.000000,0.00,0.00,0.00,50,*3a"));
+        
+        verifyPosition(decoder, text(
+                "$GPRMC,125735.000,A,6010.34349,N,02445.72838,E,1.0,101.7,050509,6.9,W,A*1F"));
+
+        verifyPosition(decoder, text(
+                "$GPGGA,000000.000,6010.34349,N,02445.72838,E,1,05,1.7,0.9,M,35.1,M,,*59"));
+        
+        verifyPosition(decoder, text(
+                "123456789$GPGGA,000000.000,4610.1676,N,00606.4586,E,0,00,4.3,0.0,M,50.7,M,,0000*59"));
+        
+        verifyPosition(decoder, text(
+                "123456789$GPRMC,155708.252,V,4610.1676,N,00606.4586,E,000.0,000.0,060214,,,N*76"));
+        
+        verifyPosition(decoder, text(
+                "990000561287964,$GPRMC,213516.0,A,4337.216791,N,11611.995877,W,0.0,335.4,181214,,,A * 72"));
+
+        verifyPosition(decoder, text(
+                "355096030432529$GPGGA,000000.00,3136.599,S,5213.981,W,1,7,2.13,250.00,M,-16.384,M,3550960304325290.0,1"));
+
+        verifyPosition(decoder, text(
+                "355096030432529$GPGGA,000000.00,3136.628,S,5213.990,W,1,7,2.13,250.00,M,-16.384,M,0.0,1"));
+
+    }
+
+    @Test
+    public void testMaxonDecode() throws Exception {
+
+        // Maxon devices can send NMEA before identification
+
+        T55ProtocolDecoder decoder = new T55ProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "$GPRMC,012006,A,4828.10,N,1353.52,E,0.00,0.00,180915,020.3,E*42"));
+
+        verifyPosition(decoder, text(
+                "$GPFID,ID123456ABC"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/T57FrameDecoderTest.java b/src/test/java/org/traccar/protocol/T57FrameDecoderTest.java
new file mode 100644
index 000000000..f74d3c350
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/T57FrameDecoderTest.java
@@ -0,0 +1,19 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class T57FrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        T57FrameDecoder decoder = new T57FrameDecoder();
+
+        verifyFrame(
+                binary("2a5435372346312354353731313137303031233330313131372330303038343323323233342e31333033234e2330383832362e313731342345232b302e3234322c2b302e3130392c2d302e37383923302e30303023362e323030303023413223342e3223"),
+                decoder.decode(null, null, binary("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")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/T57ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/T57ProtocolDecoderTest.java
new file mode 100644
index 000000000..c457b4602
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/T57ProtocolDecoderTest.java
@@ -0,0 +1,27 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class T57ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        T57ProtocolDecoder decoder = new T57ProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "*T57#F1#T571117001#301117#000843#2234.1303#N#08826.1714#E#+0.242,+0.109,-0.789#0.000#6.20000#A2#4.2#"));
+
+        verifyPosition(decoder, text(
+                "*T57#F1#0123456789#041117#152900#1258.9653#N#07738.4169#E#00000000000000000000#0.000#926.300#A2#4.0#"));
+
+        verifyPosition(decoder, text(
+                "*T57#F2#0123456789#041117#152900#1258.9653#N#07738.4169#E#00000000000000000000#0.000#926.300#A2#4.0#"));
+
+        verifyNull(decoder, text(
+                "*T57#F3#0123456789#041117#152900#1258.9653#N#07738.4169#E#I#9674432345#340#"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/T800xProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/T800xProtocolDecoderTest.java
new file mode 100644
index 000000000..fe77d91b7
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/T800xProtocolDecoderTest.java
@@ -0,0 +1,48 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class T800xProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        T800xProtocolDecoder decoder = new T800xProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "252501001504050880061689888888111111250350"));
+
+        verifyPosition(decoder, binary(
+                "2525020044a66d0862522030401350001403841409c40064edc000051100960000071701370000003ea7ee0019032010581300000000aad3e1bda6f24d42000000001281"));
+
+        verifyPosition(decoder, binary(
+                "252502004400010880616898888888000A00FF2001000020409600989910101010055501550000101005050005051010050558866B4276D6E342912AB441111500051010"));
+
+        verifyNull(decoder, binary(
+                "232301001500000880316890202968140197625020"));
+
+        verifyNull(decoder, binary(
+                "232303000f00000880316890202968"));
+
+        verifyAttributes(decoder, binary(
+                "232302004200000880316890202968001e02582d00000000000000050000320000018901920000001dc1e2001601081154255d0202005a0053875a00a57e5a00af80"));
+
+        verifyNull(decoder, binary(
+                "232301001500020357367031063979150208625010"));
+
+        verifyNull(decoder, binary(
+                "232303000f00000357367031063979"));
+
+        verifyPosition(decoder, binary(
+                "232304004200030357367031063979003c03842307d00000c80000050100008000008900890100000017b100151022121648b8ef0c4422969342cec5944100000110"));
+
+        verifyPosition(decoder, binary(
+                "232302004200150357367031063979003c03842307d000004a0000050100004001009500940000000285ab001510281350477f710d4452819342d1ba944101160038"));
+
+        verifyAttributes(decoder, binary(
+                "232302004200000357367031063979003c03842307d000008000000501000000010094009400000002a0b90015102814590694015a00620cf698620cf49e620cf498"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/T800xProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/T800xProtocolEncoderTest.java
new file mode 100644
index 000000000..af3700225
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/T800xProtocolEncoderTest.java
@@ -0,0 +1,23 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+public class T800xProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        T800xProtocolEncoder encoder = new T800xProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_CUSTOM);
+        command.set(Command.KEY_DATA, "RELAY,0000,On#");
+
+        verifyCommand(encoder, command, binary("232381001e000101234567890123450152454c41592c303030302c4f6e23"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TaipProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/TaipProtocolDecoderTest.java
new file mode 100644
index 000000000..bdbaec8aa
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TaipProtocolDecoderTest.java
@@ -0,0 +1,86 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TaipProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TaipProtocolDecoder decoder = new TaipProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                ">RGP211217112154-2748332-058946350000000FF7F2100;ID=AA01;#0002;*2D<"));
+
+        verifyPosition(decoder, text(
+                ">RCV12270218010247-3471349-058400030002057F001200020A1D013010600001509+0000FF+0000FF;#1DE2;ID=7196;*03<"));
+
+        verifyPosition(decoder, text(
+                ">RPV03874+3477708-0923453100029212;ID=0017;*71<"));
+
+        verifyNull(decoder, text(
+                ">RAL03874+00185+00012;ID=0017;*4A<"));
+
+        verifyNull(decoder, text(
+                ">RCP03874+347771-092345312;ID=0017;*65<"));
+
+        verifyNull(decoder, text(
+                ">RLN03874000+347770828-0923453071+000608270000+0000292309000000000000000000000000000000000000000000000012;ID=0017;*49<"));
+
+        verifyPosition(decoder, text(
+                ">RPV46640+4197412-0752857900015802;ID=5102;*71<"));
+
+        verifyNull(decoder, text(
+                ">RCP46640+419741-075285802;ID=5102;*6C<"));
+
+        verifyPosition(decoder, text(
+                ">REV001958003965+0307178+1016144900031532;IO=300;SV=8;BL=4159;CF=8161,C,13;AD=14145;IX=10233040;FF=0,0,0,0;VO=338578;ID=357042063052352<"));
+
+        verifyPosition(decoder, text(
+                ">REV011958000369+0307185+1016144400000032;IO=200;SV=9;BL=4158;CF=0,0,0;AD=12347;IX=10213040;FF=0,0,0,0;VO=338572;ID=357042063052352<"));
+
+        verifyPosition(decoder, text(
+                ">REV421942237017+1170957-0701880200000032;ID=356612022463055<"));
+
+        verifyPosition(decoder, text(
+                ">RGP200317010815-3852.9306-06204.88560000003000101;&01;ID=5555;#7AD7*51<"));
+
+        verifyPosition(decoder, text(
+                ">RCQ09000000000000-3460365-058381460000007F0000000000000115000FFFF1099;#0000;ID=555224;*05<"));
+
+        verifyPosition(decoder, text(
+                ">RBR00130217040848-3462200-05846708000175FF0022900003B3C13010800001118410+24061A;ID=555224;*07<"));
+
+        verifyPosition(decoder, text(
+                ">REV451891352379+0307152+1016143700000012;SV=8;BL=4416;VO=8055;ID=356612026322000<"));
+
+        verifyPosition(decoder, text(
+                ">RGP230615010248-2682523-065236820000003007F4101;ID=0005;#0002;*2A<"),
+                position("2015-06-23 01:02:48.000", true, -26.82523, -65.23682));
+
+        verifyPosition(decoder, text(
+                ">RGP190805211932-3457215-058493640000000FFBF0300;ID=8251;#2122;*54<"));
+
+        verifyPosition(decoder, text(
+                ">RPV00000+3739438-1220384601512612;ID=1234;*7F"));
+
+        verifyPosition(decoder, text(
+                "\r\n>REV691615354941+3570173+1397742703203212;ID=Test"));
+
+        verifyPosition(decoder, text(
+                ">REV481599462982+2578391-0802945201228512;ID=Test"),
+                position("2010-09-02 17:29:42.000", true, 25.78391, -80.29452));
+        
+        verifyPosition(decoder, text(
+                ">REV131756153215+3359479-0075299001031332;VO=10568798;IO=310;SV=10;BL=4190;CV09=0;AD=0;AL=+47;ID=356612021059680"));
+
+        verifyPosition(decoder, text(
+                ">RPV02138+4555512-0735478000000032;ID=1005;*76<"));
+
+        verifyPosition(decoder, text(
+                ">RPV19105+4538405-0739518900000012;ID=9999;*7A<\r\n"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TekFrameDecoderTest.java b/src/test/java/org/traccar/protocol/TekFrameDecoderTest.java
new file mode 100644
index 000000000..0446670d8
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TekFrameDecoderTest.java
@@ -0,0 +1,23 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TekFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TekFrameDecoder decoder = new TekFrameDecoder();
+
+        verifyFrame(
+                binary("020315048715E70861074028023219026200400A0340002C007F0009000000000000000000402842064028420641284206402844064128440640284406402844064028440641284406402844060010010C04052B000253000000000001060A0000000000000228330000FF0000FF360014B394"),
+                decoder.decode(null, null, binary("020315048715E70861074028023219026200400A0340002C007F0009000000000000000000402842064028420641284206402844064128440640284406402844064028440641284406402844060010010C04052B000253000000000001060A0000000000000228330000FF0000FF360014B394")));
+
+        verifyFrame(
+                binary("0501C2828E14750861075021004551047B00019700000082010F0A5B28770A5B28770A5B28760A5B28770A5B28770A5B28770A5B28770A5B28760A5B28760A5B28760A5B28770A5B28760A5B28760A5B28760A5D28770A5D28770A5D28770A5D28770A5D28770A5D28770A5D28770A5D28770A5D28770A5D28770A5F2877000000000000000000000000EEBA"),
+                decoder.decode(null, null, binary("0501C2828E14750861075021004551047B00019700000082010F0A5B28770A5B28770A5B28760A5B28770A5B28770A5B28770A5B28770A5B28760A5B28760A5B28760A5B28770A5B28760A5B28760A5B28760A5D28770A5D28770A5D28770A5D28770A5D28770A5D28770A5D28770A5D28770A5D28770A5D28770A5F2877000000000000000000000000EEBA")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TekProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/TekProtocolDecoderTest.java
new file mode 100644
index 000000000..f67ae9c3f
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TekProtocolDecoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TekProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TekProtocolDecoder decoder = new TekProtocolDecoder(null);
+
+        verifyPosition(decoder, binary(
+                "0501E304E00E76086107502100455111492C33332C3137303935342E302C353235352E393933344E2C30303833322E34333935572C322E312C3133342E382C322C302E30302C302E302C302E302C3234303931352C30362C3C45"));
+
+        verifyAttributes(decoder, binary(
+                "0501C2828E14750861075021004551047B00019700000082010F0A5B28770A5B28770A5B28760A5B28770A5B28770A5B28770A5B28770A5B28760A5B28760A5B28760A5B28770A5B28760A5B28760A5B28760A5D28770A5D28770A5D28770A5D28770A5D28770A5D28770A5D28770A5D28770A5D28770A5D28770A5F2877000000000000000000000000EEBA"));
+
+        verifyAttributes(decoder, binary(
+                "0509220886157E0863835020373564087B00018C0000018003160A6E28790A6E28790A6E287A0A6E287A0A6E287A0A6E287A0A6E287A0A6E287A0A6E287A0A6E287A000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000BD35"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TelemaxProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/TelemaxProtocolDecoderTest.java
new file mode 100644
index 000000000..e330600e5
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TelemaxProtocolDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TelemaxProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TelemaxProtocolDecoder decoder = new TelemaxProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "%067374070128"));
+
+        verifyPositions(decoder, text(
+                "Y000007C6999999067374074649003C00A7018074666F60D66818051304321900000000C5"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TelicFrameDecoderTest.java b/src/test/java/org/traccar/protocol/TelicFrameDecoderTest.java
new file mode 100644
index 000000000..5fcbcbb57
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TelicFrameDecoderTest.java
@@ -0,0 +1,42 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TelicFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TelicFrameDecoder decoder = new TelicFrameDecoder();
+
+        verifyFrame(
+                binary("303032363230333339337c3232367c31307c303032303034303130"),
+                decoder.decode(null, null, binary("303032363230333339337c3232367c31307c30303230303430313000")));
+
+        verifyFrame(
+                binary("3030333032303333393332352c3139303331373038333035322c302c3138303331373130333132372c3235393932342c3434353133332c332c302c302c392c2c2c39332c31323231303134312c2c303031302c30302c34302c3234302c302c30343036"),
+                decoder.decode(null, null, binary("630000003030333032303333393332352c3139303331373038333035322c302c3138303331373130333132372c3235393932342c3434353133332c332c302c302c392c2c2c39332c31323231303134312c2c303031302c30302c34302c3234302c302c3034303600")));
+
+        verifyFrame(
+                binary("303032363239363231385343434530315f534343457c3232367c31307c30323637"),
+                decoder.decode(null, null, binary("303032363239363231385343434530315f534343457c3232367c31307c3032363700")));
+
+        verifyFrame(
+                binary("30303434323936323138544c4f43303236372c30302c3031313030393030303239363231382c3139303331373038333033362c3235353137382c3434353037322c332c302c38322c2c2c2c3136382c31343734313239362c2c30302c30302c302c323137"),
+                decoder.decode(null, null, binary("6400000030303434323936323138544c4f43303236372c30302c3031313030393030303239363231382c3139303331373038333033362c3235353137382c3434353037322c332c302c38322c2c2c2c3136382c31343734313239362c2c30302c30302c302c32313700")));
+
+        verifyNull(
+                decoder.decode(null, null, binary("00303032363937393238317c3233327c30337c30303230303430313000")));
+
+        verifyFrame(
+                binary("303032363937393238317c3233327c30337c303032303034303130"),
+                decoder.decode(null, null, binary("303032363937393238317c3233327c30337c30303230303430313000")));
+
+        verifyFrame(
+                binary("3030323039373932383139392c3231303231363038313930302c302c3231303231363038313835392c3031333839333338352c34363635383639352c332c302c302c382c2c2c3534312c36313239382c2c303030302c30302c302c3139362c302c30343037"),
+                decoder.decode(null, null, binary("650000003030323039373932383139392c3231303231363038313930302c302c3231303231363038313835392c3031333839333338352c34363635383639352c332c302c302c382c2c2c3534312c36313239382c2c303030302c30302c302c3139362c302c3034303700")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TelicProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/TelicProtocolDecoderTest.java
new file mode 100644
index 000000000..b743cef96
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TelicProtocolDecoderTest.java
@@ -0,0 +1,94 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TelicProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TelicProtocolDecoder decoder = new TelicProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "0026355565071347499|206|01|001002008"));
+
+        verifyPosition(decoder, text(
+                "052028495198,160917073641,0,160917073642,43879,511958,3,24,223,17,,,-3,142379,,0010,00,64,205,0,0499"));
+
+        verifyPosition(decoder, text(
+                "01302849516,160917073503,0,160917073504,43907,512006,3,11,160,14,,,-7,141811,,0010,00,64,206,0,0499"));
+
+        verifyPosition(decoder, text(
+                "002135556507134749999,010817171138,0,010817171138,004560973,50667173,3,0,0,11,1,1,100,958071,20601,000000,00,4142,0000,0000,0208,10395,0"));
+
+        verifyPosition(decoder, text(
+                "442045993198,290317131935,0,290317131935,269158,465748,3,26,183,,,,184,85316567,226,01,00,68,218"));
+
+        verifyPosition(decoder, text(
+                "673091036017,290317131801,0,290317131801,262214,450536,3,40,199,8,,,154,19969553,,0011,00,59,240,0,0406"));
+
+        verifyPosition(decoder, text(
+                "092020621198,280317084155,0,280317084156,259762,444356,3,42,278,9,,,89,56793311,,0110,00,67,0,,0400"));
+
+        verifyPosition(decoder, text(
+                "502091227598,280317084149,0,280317084149,261756,444358,3,33,286,9,,,77,3143031,,0010,00,171,240,0,0406"));
+
+        verifyPosition(decoder, text(
+                "232027997498,230317083900,0,230317083900,260105,444112,3,22,259,,,,111,61110817,226,01,00,255,218,00000000000000"));
+
+        verifyPosition(decoder, text(
+                "072027997498,230317082635,0,230317082635,260332,444265,3,28,165,,,,124,61107582,226,01,00,255,219,00000000000000"));
+
+        verifyNull(decoder, text(
+                "0026203393|226|10|002004010"));
+
+        verifyPosition(decoder, text(
+                "003020339325,190317083052,0,180317103127,259924,445133,3,0,0,9,,,93,12210141,,0010,00,40,240,0,0406"));
+
+        verifyNull(decoder, text(
+                "0026296218SCCE01_SCCE|226|10|0267"));
+
+        verifyNull(decoder, text(
+                "1242022592TTUV0100,0201,351266000022592,170403114305,0115859,480323,3,30,5,9,3,4,650,250000000,26202,1001,0001,211,233,111,0"));
+
+        verifyPosition(decoder, text(
+                "123002259213,170403114305,1234,170403114305,0115859,480323,3,30,5,9,3,4,650,250000000,26202,1001,0001,211,233,111,0,600"));
+
+        verifyNull(decoder, text(
+                "0044296218TLOC0267,00,011009000296218,190317083036,255178,445072,3,0,82,,,,168,14741296,,00,00,0,217"));
+
+        verifyPosition(decoder, text(
+                "003097061325,220616044200,0,220616044200,247169,593911,3,48,248,8,,,50,1024846,,1111,00,48,0,51,0406"));
+
+        verifyPosition(decoder, text(
+                "003097061325,210216112630,0,210216001405,246985,594078,3,0,283,12,,,23,4418669,,0010,00,117,0,0,0108"));
+
+        verifyPosition(decoder, text(
+                "592078222222,010100030200,0,240516133500,222222,222222,3,0,0,5,,,37,324,,1010,00,48,0,0,0406"));
+
+        verifyPosition(decoder, text(
+                "002017297899,220216111100,0,220216111059,014306446,46626713,3,7,137,7,,,448,266643,,0000,00,0,206,0,0407"));
+
+        verifyPosition(decoder, text(
+                "003097061325,210216112630,0,210216001405,246985,594078,3,0,283,12,,,23,4418669,,0010,00,117,0,0,0108"));
+
+        verifyNull(decoder, text(
+                "0026970613|248|01|004006011"));
+
+        verifyPosition(decoder, text(
+                "032097061399,210216112800,0,210216112759,246912,594076,3,47,291,10,,,46,4419290,,0010,00,100,0,0,0108"));
+
+        verifyPosition(decoder, text(
+                "002017297899,190216202500,0,190216202459,014221890,46492170,3,0,0,6,,,1034,43841,,0000,00,0,209,0,0407"));
+
+        verifyPosition(decoder, text(
+                "182043672999,010100001301,0,270613041652,166653,475341,3,0,355,6,2,1,231,8112432,23201,01,00,217,0,0,0,0,7"),
+                position("2013-06-27 04:16:52.000", true, 47.53410, 16.66530));
+
+        verifyPosition(decoder, text(
+                "182043672999,010100001301,0,270613041652,166653,475341,3,0,355,6,2,1,231,8112432,23201,01,00,217,0,0,0,0,7"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TeltonikaProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/TeltonikaProtocolDecoderTest.java
new file mode 100644
index 000000000..f94cd9460
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TeltonikaProtocolDecoderTest.java
@@ -0,0 +1,134 @@
+package org.traccar.protocol;
+
+import org.junit.Ignore;
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Position;
+
+public class TeltonikaProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TeltonikaProtocolDecoder decoder = new TeltonikaProtocolDecoder(null, false);
+
+        verifyNull(decoder, binary(
+                "000F313233343536373839303132333435"));
+
+        verifyPositions(decoder, binary(
+                "000000000000004c08010000016818d500580009c28d9f1cb3757a00be00c60f0053000f06f0011503c80001011d00fc0007423799180053cdf80dce426f430f88190bb8560bb802f100005aa110002887e000010000ee8d"));
+
+        verifyPositions(decoder, binary(
+                "00000000000000818e0100000166e368a510000f0d8b5b20961c35008d010308000000000014000900ef0000f00100500100150400c800004501001e00002500002900000a00b5000800b60007004230dc0018000000430fcb0044005f001103de001200e50013001200240000000000000001010000113141314a433534343452373235323336370100005e99"));
+
+        verifyPositions(decoder, binary(
+                "000000000000009D10020000013feb55ff74000f0ea850209a690000AE00B90B00000000070A050001000002000003000004000120000200180000004601290200C700000000004C0000000001003E00000000000000000000015B198C7498000F0DBC502095872F00AE00B90B00000000070A050001000002000003000004000120000200180000004601290200C700000000004C0000000001003E000000000000000002000009A5"));
+
+        verifyPositions(decoder, binary(
+                "000000000000009F100100000164D855401800D5E3B744EC11C762023B011A060000000007200A010000010500010600010D00010E00010F00011600011700011800011F001301010000010700000108000001090000010A0000010B0000010C000001100000011100000112000001130000011400000115000001190000011A0000011B0000011C0000011D0000011E000003010200000000010300000000010400000000000100000D3B"));
+
+        verifyPositions(decoder, binary(
+                "000000000000008c08010000013feb55ff74000f0ea850209a690000940000120000001e09FD01FE210300040016014703f0001504c8000c0900730a00460b00501300464306d7440000b5000bb60007422e9f180000cd0386ce000107c700000000f10000601a46000001344800000bb84900000bb84a00000bb84c00000000024e0000000000000000cf00000000000000000100003fca"));
+
+        verifyPositions(decoder, binary(
+                "00000000000000A708010000016269E7D9A8000A5A0F0A1CBF8F3300880046120000001C0801014F005100550F740073007801790103430000440000426F980B540000000056000045275700000047580000022659000000005D0000000068000003D07100007355870000000288000000008A000045270669584C5241534834336A30304731363538326B3600FFFFFF0000008155412055414430308230303039383236368330303000000000000100008396"));
+
+        verifyPositions(decoder, binary(
+                "0000000000000035080100000161f37c50500020de5ba60ef11450000000000000000006040100b300b400ef000109002000014e0000000000000000010000be52"));
+
+        verifyPositions(decoder, binary(
+                "000000000000008c08010000013feb55ff74000f0ea850209a690000940000120000001e09010002000300040016014703f0001504c8000c0900730a00460b00501300464306d7440000b5000bb60007422e9f180000cd0386ce000107c700000000f10000601a46000001344800000bb84900000bb84a00000bb84c00000000024e0000000000000000cf00000000000000000100003fca"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+        verifyPositions(decoder, binary(
+                "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"));
+
+        verifyPositions(decoder, binary(
+                "0000000000000000080100000113fc208dff00209cca800f14f650006f00d60400040004030101150316030001460000015d000100000000")); // invalid length and checksum
+
+        verifyPositions(decoder, binary(
+                "000000000000009f080400000159738f76b8012e13b796110ab27600d700000b00004e01000000014e000000000000000000000159738f6ee8012e13b796110ab27600d700000a00004e01000000014e01000b00791c179300000159738f6b00012e13b796110ab27600d700000a00004e01000000014e000000000000000000000159738f5f48012e13b796110ab27600d700000b00004e01000000014e01000b00791c17930400009671"));
+
+        verifyPositions(decoder, false, binary(
+                "00000000000000710c0106000000694154244d5347534e443d342c225354474234302c50522c3335363630313036303236353035302c313630343232313531372c313630343232313531382c432c2b3032332e332c302c2b3032332e312c302c4445414354492c302c4445414354492c302c312c30220d0a010000d8db"));
+
+        verifyPositions(decoder, false, binary(
+                "0000000000000055070450aa14320201f00150aa17f3031f42332a4c4193d68c008d00020901f00150aa1b6a031f423383f54193624f009d00000a01f00150aa1c230fc01a0000552b040164f400dd00f0010143100c0105000000050400006846"));
+
+        verifyPositions(decoder, binary(
+                "000000000000003508010000014f8e016420002141bbaf0f4e96a7fffa0000120000000602010047030242669c92000002c7000000009100000000000100002df3"));
+        
+        verifyPositions(decoder, binary(
+                "00000000000000A7080400000113fc208dff000f14f650209cca80006f00d60400040004030101150316030001460000015d0000000113fc17610b000f14ffe0209cc580006e00c00500010004030101150316010001460000015e0000000113fc284945000f150f00209cd200009501080400000004030101150016030001460000015d0000000113fc267c5b000f150a50209cccc0009300680400000004030101150016030001460000015b00040000"));
+        
+        verifyPositions(decoder, binary(
+                "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"));
+
+        verifyPositions(decoder, binary(
+                "000000000000002c08010000013eff8d6f9800173295002111f400008100ae0b0000000401010003090016432980422f7200000100007a5d"));
+        
+        verifyPositions(decoder, binary(
+                "00000000000000c7070441bf9db00fff425adbd741ca6e1e009e1205070001030b160000601a02015e02000314006615000a160067010500000ce441bf9d920fff425adbb141ca6fc900a2b218070001030b160000601a02015e02000314006615000a160067010500000cc641bf9d740fff425adbee41ca739200b6c91e070001030b1f0000601a02015f02000314006615000a160066010500000ca841bf9cfc0fff425adba041ca70c100b93813070001030b1f0000601a02015f02000314002315000a160025010500000c3004000000"));
+
+        verifyPositions(decoder, binary(
+                "000000000000003107024c61410b013f4231c2c141d0beb9003d000005006483ff4c6140eb013f4231c2c141d0beb9003d000005006483ff02000041df"));
+
+        verifyPositions(decoder, binary(
+                "000000000000002b080100000140d4e3ec6e000cc661d01674a5e0fffc00000900000004020100f0000242322318000000000100007a04"));
+
+        verifyPositions(decoder, false, binary(
+                "000000000000002d0c01060000002523464d323d3236323033323736313732313339362c32363230332c30372e30322e30350d0a0100009a2e"));
+
+        verifyPositions(decoder, binary(
+                "00000000000000a608010000013f14a1d1ce000f0eb790209a778000ab010c0500000000000000000100003390"));
+
+        verifyPositions(decoder, binary(
+                "000000000000004508010000015eb70a86d00024089d4d21dee3860137005f12005f000e06ef01f00150011503c800450108b5000bb6000642382718005fcd057ace19d3430f57440000000001000002bf"));
+
+        verifyPositions(decoder, binary(
+                "000000000000004a08010000015ebc1da508002411926621f15246010b00b913005e000f06ef01f00150011505c800450108b5000bb6000642381b18005ecd0318ce19cd430f5844000001f1000061a900010000c8e1"));
+
+        decoder.setExtended(true);
+
+        verifyPositions(decoder, false, binary(
+                "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"));
+
+        verifyPositions(decoder, false, binary(
+                "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"));
+
+    }
+
+
+    @Test
+    public void testDecodePhoto() throws Exception {
+
+        TeltonikaProtocolDecoder decoder = new TeltonikaProtocolDecoder(null, false);
+
+        verifyNull(decoder, binary(
+                "000F313233343536373839303132333435"));
+
+        verifyNull(decoder, binary(
+                "00000000000000090c010D00000001000100000CD8"));
+
+        verifyNull(decoder, binary(
+                "000000000000000D0c010D0000000501598493ED01000018B2"));
+
+        verifyNull(decoder, binary(
+                "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"));
+
+    }
+
+    @Ignore
+    @Test
+    public void testDecodeConnectionless() throws Exception {
+
+        TeltonikaProtocolDecoder decoder = new TeltonikaProtocolDecoder(null, true);
+
+        verifyPositions(decoder, false, binary(
+                "0049cafe0122000f33353734353430373237313339373508010000015d3766f6a800003eef961ec6215e0063006d09003100070401000200f001c8000242381c18003201c7000000e10001"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TeltonikaProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/TeltonikaProtocolEncoderTest.java
new file mode 100644
index 000000000..83ea961b4
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TeltonikaProtocolEncoderTest.java
@@ -0,0 +1,23 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+public class TeltonikaProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        TeltonikaProtocolEncoder encoder = new TeltonikaProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_CUSTOM);
+        command.set(Command.KEY_DATA, "setdigout 11");
+
+        verifyCommand(encoder, command, binary("00000000000000160C01050000000E7365746469676F75742031310D0A010000E258"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/ThinkRaceProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/ThinkRaceProtocolDecoderTest.java
new file mode 100644
index 000000000..a30d17502
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/ThinkRaceProtocolDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class ThinkRaceProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        ThinkRaceProtocolDecoder decoder = new ThinkRaceProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "48415349483031343730303134382C8000100134363030303134363139363239343806FF"));
+
+        verifyPosition(decoder, binary(
+                "48415349483031343730303134382C90001755701674D70155466406CBB813003D24A410F5000000770B4C"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Tk102ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Tk102ProtocolDecoderTest.java
new file mode 100644
index 000000000..f1ba7c593
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Tk102ProtocolDecoderTest.java
@@ -0,0 +1,51 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Tk102ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Tk102ProtocolDecoder decoder = new Tk102ProtocolDecoder(null);
+
+        verifyNull(decoder, buffer(
+                "[\u00800000000000\u000821315452]"));
+
+        verifyNull(decoder, buffer(
+                "[\u00f00000000000\u000821315452]"));
+
+        verifyPosition(decoder, buffer(
+                "[\u00900100100001\u0036(ONE025857A2232.0729N11356.0030E000.02109110100000000)]"));
+
+        verifyPosition(decoder, buffer(
+                "[\u00900100100001\u0036(ITV025857A2232.0729N11356.0030E000.02109110100000000)]"));
+
+        verifyNull(decoder, buffer(
+                "[\u00210000000081\u0072(353327023367238,TK102-W998_01_V1.1.001_130219,255,001,255,001,0,100,100,0,internet,0000,0000,0,0,255,0,4,1,11,00)]"));
+        
+        verifyNull(decoder, buffer(
+                "[\u004c0000001323\u004e(GSM,0,0,07410001,20120101162600,404,010,9261,130,0,2353,130,35,9263,130,33,1)]"));
+
+        verifyNull(decoder, buffer(
+                "[\u00250000000082\u001d(100100000000000600-30-65535)]"));
+
+        verifyNull(decoder, buffer(
+                "[\u00230000000004\u0018(062100000000000600-0-0)]"));
+
+        verifyPosition(decoder, buffer(
+                "[\u003d0000000083\u0036(ITV013939A4913.8317N02824.9241E000.90018031310010000)]"));
+        
+        verifyPosition(decoder, buffer(
+                "[\u003d0000000036\u0036(ITV012209A4913.8281N02824.9258E000.32018031310010000)]"));
+        
+        verifyPosition(decoder, buffer(
+                "[\u003b0000000010\u0036(ONE200834A5952.8114N01046.0832E003.93212071305010000)]"));
+
+        verifyPosition(decoder, buffer(
+                "[\u00930000000000\u0046(ITV153047A1534.0805N03233.0888E000.00029041500000400&Wsz-wl001&B0000)]"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Tk103FrameDecoderTest.java b/src/test/java/org/traccar/protocol/Tk103FrameDecoderTest.java
new file mode 100644
index 000000000..1f42e588f
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Tk103FrameDecoderTest.java
@@ -0,0 +1,44 @@
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Tk103FrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Tk103FrameDecoder decoder = new Tk103FrameDecoder();
+
+        verifyFrame(
+                binary("283836343735353535353535353535352C445733422C3133313131372C412C353536322E30323837304E2C30313334382E3038313934452C312E3539372C3232333730372C3239312E36352C2D302E31302C3429"),
+                decoder.decode(null, null, binary("283836343735353535353535353535352C445733422C3133313131372C412C353536322E30323837304E2C30313334382E3038313934452C312E3539372C3232333730372C3239312E36352C2D302E31302C3429283836343735353535353535353535352C5A4332302C3133313131372C3232333730362C362C3339342C36353533352C32353529")));
+
+        ByteBuf buf = binary("283836343535353535353535353535352C445735422C3231302C362C353939352C34373730312C352C33303A45453A43433A45373A38363A44442A2D35392A31312C34433A36303A43433A45413A42423A45452A2D36382A312C34323A41413A44453A45413A42423A30302A2D36392A312C33323A43443A42423A43333A34463A43432A2D38362A332C31303A30303A34333A42413A32323A31352A2D38382A312C3135313131372C31363337323229283836343735353535353535353535352C5A4332302C3133313131372C3232333730362C362C3339342C36353533352C32353529");
+
+        verifyFrame(
+                binary("283836343535353535353535353535352C445735422C3231302C362C353939352C34373730312C352C33303A45453A43433A45373A38363A44442A2D35392A31312C34433A36303A43433A45413A42423A45452A2D36382A312C34323A41413A44453A45413A42423A30302A2D36392A312C33323A43443A42423A43333A34463A43432A2D38362A332C31303A30303A34333A42413A32323A31352A2D38382A312C3135313131372C31363337323229"),
+                decoder.decode(null, null, buf));
+
+        verifyFrame(
+                binary("283836343735353535353535353535352C5A4332302C3133313131372C3232333730362C362C3339342C36353533352C32353529"),
+                decoder.decode(null, null, buf));
+
+        verifyFrame(
+                binary("283836343735353535353535353535352C445733422C3133313131372C412C353536322E30323837304E2C30313334382E3038313934452C312E3539372C3232333730372C3239312E36352C2D302E31302C3429"),
+                decoder.decode(null, null, binary("676172626167652540232A5E242D2B3C3E3F2429292924242D2D283836343735353535353535353535352C445733422C3133313131372C412C353536322E30323837304E2C30313334382E3038313934452C312E3539372C3232333730372C3239312E36352C2D302E31302C3429283836343735353535353535353535352C5A4332302C3133313131372C3232333730362C362C3339342C36353533352C32353529")));
+
+        verifyNull(decoder.decode(null, null, binary("67")));
+
+        verifyNull(decoder.decode(null, null, binary("676172626167652540232a5e242d2b3c3e3f24")));
+
+        verifyFrame(
+                binary("2838363437353535353535352C5A4330332C3139313131372C3233343432312C24294E6F746963653A0D0A446576696365732073657269616C206E756D6265723A200D0A3538303535353535353535292E0D0A536F6674776172652076657273696F6E3A0D0A56322E3030302C323031362F30382F32332031313A3137292429"),
+                decoder.decode(null, null, binary("610D0A676172626167652540232A5E242D2B3C3E3F2429292924242D2D2838363437353535353535352C5A4330332C3139313131372C3233343432312C24294E6F746963653A0D0A446576696365732073657269616C206E756D6265723A200D0A3538303535353535353535292E0D0A536F6674776172652076657273696F6E3A0D0A56322E3030302C323031362F30382F32332031313A3137292429283836343735353535353535353535352C5A4332302C3133313131372C3232333730362C362C3339342C36353533352C32353529")));
+
+        verifyNull(decoder.decode(null, null, binary("610D0A676172626167652540232A5E242D2B3C3E3F2429292924242D2D2838363437353535353535352C5A4330332C3139313131372C3233343432312C24294E6F746963653A0D0A446576696365732073657269616C206E756D6265723A200D0A3538303535353535353535292E0D0A536F6674776172652076657273696F6E3A0D0A56322E3030302C323031362F30382F32332031313A31372929283836343735353535353535353535352C5A4332302C3133313131372C3232333730362C362C3339342C36353533352C32353529")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Tk103ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Tk103ProtocolDecoderTest.java
new file mode 100644
index 000000000..db636893b
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Tk103ProtocolDecoderTest.java
@@ -0,0 +1,202 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Position;
+
+public class Tk103ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Tk103ProtocolDecoder decoder = new Tk103ProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "(094625928000BR00190213A1156.0431S07705.6145W000.000023521.40000000007L00000314T113)"));
+
+        verifyPosition(decoder, text(
+                "(019358704260BR00180725A2300.0957N07235.2748E032.412092187.58001100166L000D9779)"));
+
+        verifyPosition(decoder, text(
+                "(358511020000026,DW5B,310,6,29876,30393,0,041217,102211)"));
+
+        verifyPosition(decoder, text(
+                "(007611121184BR00170816A2401.5217N07447.0788E000.0221352232.340000004FL0030F14F)"));
+
+        verifyNull(decoder, text(
+                "(027044702512BP00027044702512HSO01A4)"));
+
+        verifyPosition(decoder, text(
+                "(864768011069660,ZC11,250517,V,0000.0000N,00000.0000E,000.0,114725,000.0,0.00,11)"));
+
+        verifyPosition(decoder, text(
+                "(864768011069660,ZC17,250517,A,3211.7118N,03452.8086E,0.68,115525,208.19,64.50,9)"));
+
+        verifyNull(decoder, text(
+                "(357593060760397BP02,G,2,170304A6015.7466N01101.8460E001.609445591.048,7)"));
+
+        verifyPosition(decoder, text(
+                "(325031693849BR00170228A5750.8012N02700.7476E000.2154529000.0000000200L00000000,170228,194530)"));
+
+        verifyAttribute(decoder, text(
+                "(087073803649BR00170221A6142.0334N02712.2197E000.3203149000.00,00000000L00000000)"),
+                Position.KEY_FUEL_LEVEL, 0);
+
+        verifyPosition(decoder, text(
+                "(864768010869060,DW30,050117,A,5135.82713N,00001.17918E,0.089,154745,000.0,43.40,12)"));
+
+        verifyNotNull(decoder, text(
+                "(087073104337BZ00,740,000,3bf7,0425,3bf7,0bf5,3bf7,09e7,3bf7,cbad,3bf7,0dcf,3bf7,c7b2,01000000)"));
+
+        verifyNull(decoder, text(
+                "(087073005534BP00HSO)"));
+
+        verifyNull(decoder, text(
+                "(027028258309BQ86,0,05550c21b10d1d0f431008bd114c0ea5078400010007a100423932,161117005322,01000001)"));
+
+        verifyNull(decoder, text(
+                "(027028258309BQ86,0,05470c0eb20d040f4410022911360e92077e00010007a1004237c7,161117005232,01000001)"));
+
+        verifyPosition(decoder, text(
+                "(01602009983BR00160830V1855.7022S4817.8731W000.0002729000.0010000000L00000000)"));
+
+        verifyPosition(decoder, text(
+                "(088046338039BR00160727A3354.7768N03540.7258E000.0140832068.4700000000L00BEB0D4+017.7)"));
+
+        verifyPosition(decoder, text(
+                "(088046338039BP05000088046338039160727A3354.7768N03540.7258E000.0140309065.1000000000L00BEB0D4+017.3)"));
+
+        verifyAttributes(decoder, text(
+                "(013632651491,ZC20,180716,144222,6,392,65535,255)"));
+
+        verifyAttributes(decoder, text(
+                "(087072009461BR00000007V0000.0000N00000.0000E000.00014039900000000L00000000)"));
+
+        verifyPosition(decoder, text(
+                "(013612345678BO012061830A2934.0133N10627.2544E040.0080331309.6200000000L000770AD)"));
+
+        verifyNotNull(decoder, text(
+                "(088047194605BZ00,510,010,36e6,932c,43,36e6,766b,36,36e6,7668,32)"));
+
+        verifyAttributes(decoder, text(
+                "(013632651491,ZC20,040613,040137,6,421,112,0)"));
+
+        verifyAttributes(decoder, text(
+                "(864768010159785,ZC20,291015,030413,3,362,65535,255)"));
+
+        verifyPosition(decoder, text(
+                "(088047365460BR00151024A2555.3531S02855.3329E004.7055148276.1701000000L00009AA3)"),
+                position("2015-10-24 05:51:48.000", true, -25.92255, 28.92222));
+
+        verifyPosition(decoder, text(
+                "(088047365460BP05354188047365460150929A3258.1754S02755.4323E009.4193927301.9000000000L00000000)"));
+
+        verifyPosition(decoder, text(
+                "(088048003342BP05354188048003342150917A1352.9801N10030.9050E000.0103115265.5600010000L000003F9)"));
+
+        verifyPosition(decoder, text(
+                "(088048003342BR00150917A1352.9801N10030.9050E000.0103224000.0000010000L000003F9)"));
+        
+        verifyPosition(decoder, text(
+                "(088048003342BR00150807A1352.9871N10030.9084E000.0110718000.0001010000L00000000)"));
+
+        verifyNull(decoder, text(
+                "(090411121854BP0000001234567890HSO)"));
+
+        verifyPosition(decoder, text(
+                "(01029131573BR00150428A3801.6382N02351.0159E000.0080729278.7800000000LEF9ECB9C)"));
+
+        verifyPosition(decoder, text(
+                "(035988863964BP05000035988863964110524A4241.7977N02318.7561E000.0123536356.5100000000L000946BB)"));
+
+        verifyPosition(decoder, text(
+                "(013632782450BP05000013632782450120803V0000.0000N00000.0000E000.0174654000.0000000000L00000000)"));
+
+        verifyPosition(decoder, text(
+                "(013666666666BP05000013666666666110925A1234.5678N01234.5678W000.002033490.00000000000L000024DE)"));
+        
+        verifyPosition(decoder, text(
+                "(013666666666BO012110925A1234.5678N01234.5678W000.0025948118.7200000000L000024DE)"));
+
+        verifyPosition(decoder, text(
+                "(088045133878BR00130228A5124.5526N00117.7152W000.0233614352.2200000000L01B0CF1C)"));
+        
+        verifyPosition(decoder, text(
+                "(008600410203BP05000008600410203130721A4152.5790N01239.2770E000.0145238173.870100000AL0000000)"));
+        
+        verifyPosition(decoder, text(
+                "(013012345678BR00130515A4843.9703N01907.6211E000.019232800000000000000L00009239)"));
+        
+        verifyPosition(decoder, text(
+                "(012345678901BP05000012345678901130520A3439.9629S05826.3504W000.1175622323.8700000000L000450AC)"));
+        
+        verifyPosition(decoder, text(
+                "(012345678901BR00130520A3439.9629S05826.3504W000.1175622323.8700000000L000450AC)"));
+        
+        verifyPosition(decoder, text(
+                "(352606090042050,BP05,240414,V,0000.0000N,00000.0000E,000.0,193133,000.0)"));
+        
+        verifyPosition(decoder, text(
+                "(352606090042050,BP05,240414,A,4527.3513N,00909.9758E,4.80,112825,155.49)"),
+                position("2014-04-24 11:28:25.000", true, 45.45586, 9.16626));
+
+        verifyPosition(decoder, text(
+                "(013632782450,BP05,101201,A,2234.0297N,11405.9101E,000.0,040137,178.48,00000000,L00000000)"));
+        
+        verifyPosition(decoder, text(
+                "(864768010009188,BP05,271114,V,4012.19376N,00824.05638E,000.0,154436,000.0)"));
+
+        verifyPosition(decoder, text(
+                "(013632651491,BP05,040613,A,2234.0297N,11405.9101E,000.0,040137,178.48)"));
+
+        verifyPosition(decoder, text(
+                "(013632651491,ZC07,040613,A,2234.0297N,11405.9101E,000.0,040137,178.48)"));
+
+        verifyPosition(decoder, text(
+                "(013632651491,ZC11,040613,A,2234.0297N,11405.9101E,000.0,040137,178.48)"));
+
+        verifyPosition(decoder, text(
+                "(013632651491,ZC12,040613,A,2234.0297N,11405.9101E,000.0,040137,178.48)"));
+
+        verifyPosition(decoder, text(
+                "(013632651491,ZC13,040613,A,2234.0297N,11405.9101E,000.0,040137,178.48)"));
+
+        verifyPosition(decoder, text(
+                "(013632651491,ZC17,040613,A,2234.0297N,11405.9101E,000.0,040137,178.48)"));
+
+        verifyPosition(decoder, text(
+                "(094050000111BP05000094050000111150808A3804.2418N04616.7468E000.0201447133.3501000011L0028019DT000)"));
+
+        verifyPosition(decoder, text(
+                "(864555555555555,DW3B,131117,A,5544.02870N,01315.08194E,1.597,223707,291.65,-0.10,4)"));
+
+        verifyPosition(decoder, text(
+                "(864555555555555,DW3B,131117,A,5544.02870N,01315.08194E,1.597,223707,291.65,0.10,8)"));
+
+        verifyPosition(decoder, text(
+                "(013632651491,ZC07,040613,A,2234.0297N,11405.9101E,000.0,040137,178.48)"));
+
+        verifyAttributes(decoder, text(
+                "(013632651491,ZC20,040613,040137,6,42,112,0)"));
+
+        verifyNotNull(decoder, text(
+                "(864555555555555,DW51,200,1,3215,43370,2,58:F3:BB:3B:AA:82*-65*1,1C:6A:BB:AA:81:95*-78*1,151117,154419)"));
+
+        verifyNotNull(decoder, text(
+                "(864555555555555,DW5B,210,6,5995,47701,5,30:EE:CC:E7:86:DD*-59*11,4C:60:CC:EA:BB:EE*-68*1,42:AA:DE:EA:BB:00*-69*1,32:CD:BB:C3:4F:CC*-86*3,10:00:43:BA:22:15*-88*1,151117,163722)"));
+
+        verifyNotNull(decoder, text(
+                "(013632651491,DW50,460,0,0,6,2,aa:bb:cc:dd:ee:ff*-8*0,aa:bb:cc:dd:ee:ff*-8*0,040613,040137)"));
+
+        verifyNotNull(decoder, text(
+                "(013632651491,DW50,460,0,0,6,0,040613,040137)"));
+
+        verifyNotNull(decoder, text(
+                "(864555555555555,ZC03,191117,234207,$Notice: Device version: 1.0$)"));
+
+        verifyNotNull(decoder, text(
+                "(864555555555555,ZC03,191117,234207,$1 .Sensor sensitivity: 1\r\n2 .Alert status: Off\r\n3 .Check interval is set to 240 minute(s).\r\n4 .Checkgsm interval is set to 60 minute(s).\r\n5 .SOS SMS Alert: On\r\n6 .SOS Call Alert: On\r\n7 . Power: 95%$)"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Tk103ProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/Tk103ProtocolEncoderTest.java
new file mode 100644
index 000000000..34b2acf86
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Tk103ProtocolEncoderTest.java
@@ -0,0 +1,282 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+import static org.junit.Assert.assertEquals;
+
+public class Tk103ProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncodeOutputControl() {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder();
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_OUTPUT_CONTROL);
+        command.set(Command.KEY_DATA, "1");
+
+        assertEquals("(123456789012345AV001)", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodeEngineStop() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_ENGINE_STOP);
+
+        assertEquals("(123456789012345AV010)", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodePositionSingle() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_POSITION_SINGLE);
+
+        assertEquals("(123456789012345AP00)", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodePositionPeriodic() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_POSITION_PERIODIC);
+        command.set(Command.KEY_FREQUENCY, 60);
+
+        assertEquals("(123456789012345AR00003C0000)", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodePositionStop() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_POSITION_STOP);
+
+        assertEquals("(123456789012345AR0000000000)", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodeGetVersion() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_GET_VERSION);
+
+        assertEquals("(123456789012345AP07)", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodeRebootDevice() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_REBOOT_DEVICE);
+
+        assertEquals("(123456789012345AT00)", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodeSetOdometer() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_SET_ODOMETER);
+
+        assertEquals("(123456789012345AX01)", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodePositionSingleAlternative() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder(true);
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_POSITION_SINGLE);
+
+        assertEquals("[begin]sms2,*getposl*,[end]", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodePositionPeriodicAlternative() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder(true);
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_POSITION_PERIODIC);
+
+        assertEquals("[begin]sms2,*routetrack*99*,[end]", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodePositionStopAlternative() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder(true);
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_POSITION_STOP);
+
+        assertEquals("[begin]sms2,*routetrackoff*,[end]", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodeGetVersionAlternative() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder(true);
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_GET_VERSION);
+
+        assertEquals("[begin]sms2,*about*,[end]", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodeRebootDeviceAlternative() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder(true);
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_REBOOT_DEVICE);
+
+        assertEquals("[begin]sms2,88888888,[end]", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodeIdentificationAlternative() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder(true);
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_IDENTIFICATION);
+
+        assertEquals("[begin]sms2,999999,[end]", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodeSosOnAlternative() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder(true);
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_ALARM_SOS);
+        command.set(Command.KEY_ENABLE, true);
+
+        assertEquals("[begin]sms2,*soson*,[end]", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodeSosOffAlternative() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder(true);
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_ALARM_SOS);
+        command.set(Command.KEY_ENABLE, false);
+
+        assertEquals("[begin]sms2,*sosoff*,[end]", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodeCustom() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder();
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_CUSTOM);
+        command.set(Command.KEY_DATA, "AA00");
+
+        assertEquals("(123456789012345AA00)", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodeCustomAlternative() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder(true);
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_CUSTOM);
+        command.set(Command.KEY_DATA, "any text is ok");
+
+        assertEquals("[begin]sms2,any text is ok,[end]", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodeSetConnectionAlternative() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder(true);
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_SET_CONNECTION);
+        command.set(Command.KEY_SERVER, "1.2.3.4");
+        command.set(Command.KEY_PORT, "5555");
+
+        assertEquals("[begin]sms2,*setip*1*2*3*4*5555*,[end]", encoder.encodeCommand(command));
+
+    }
+
+    @Test
+    public void testEncodeSosNumberAlternative() throws Exception {
+
+        Tk103ProtocolEncoder encoder = new Tk103ProtocolEncoder(true);
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_SOS_NUMBER);
+        command.set(Command.KEY_INDEX, "0");
+        command.set(Command.KEY_PHONE, "+55555555555");
+        command.set(Command.KEY_DEVICE_PASSWORD, "232323");
+
+        assertEquals("[begin]sms2,*master*232323*+55555555555*,[end]", encoder.encodeCommand(command));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Tlt2hProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Tlt2hProtocolDecoderTest.java
new file mode 100644
index 000000000..83caae208
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Tlt2hProtocolDecoderTest.java
@@ -0,0 +1,64 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Tlt2hProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Tlt2hProtocolDecoder decoder = new Tlt2hProtocolDecoder(null);
+
+        verifyPositions(decoder, text(
+                "#867962040161955#MT600#0000#0#0#137#41#0#AUTO#1\r\n" +
+                "#00019023402$GPRMC,084702.00,A,3228.6772,S,11545.9684,E,,159.80,251018,,,A*56\r\n"));
+
+        verifyPositions(decoder, text(
+                "#868323028789359#MT600#0000#AUTOLOW#1\r\n",
+                "#07d8cd5198$GPRMC,164934.00,A,1814.4854,N,09926.0566,E,0.03,,240417,,,A*4A\r\n"));
+
+        verifyNull(decoder, text(
+                "#861075026000000#\r\n",
+                "#0000#AUTO#1\r\n",
+                "#002c4968045$GPRMC,001556.00,A,3542.1569,N,13938.9814,E,7.38,185.71,160417,,,A*55\r\n"));
+
+        verifyPositions(decoder, text(
+                "#863835026938048#MT500#0000#AUTO#1\r\n",
+                "#67904917c0e$GPRMC,173926.00,A,4247.8476,N,08342.6996,W,0.03,,160417,,,A*59\r\n"));
+
+        verifyPositions(decoder, text(
+                "#357671030108689##0000#AUTO#1\r\n",
+                "#13AE2F8F$GPRMC,211452.000,A,0017.378794,S,03603.441981,E,0.000,0,060216,,,A*68\r\n"));
+
+        verifyPositions(decoder, text(
+                "#357671030946351#V500#0000#AUTO#1\r\n",
+                "#$GPRMC,223835.000,A,0615.3545,S,10708.5779,E,14.62,97.41,070313,,,D*70\r\n"),
+                position("2013-03-07 22:38:35.000", true, -6.25591, 107.14297));
+
+        verifyPositions(decoder, text(
+                "\r\n#357671030946351#V500#0000#AUTO#1\r\n",
+                "#$GPRMC,223835.000,A,0615.3545,S,10708.5779,E,14.62,97.41,070313,,,D*70\r\n"));
+
+        verifyPositions(decoder, text(
+                "#357671030938911#V500#0000#AUTOSTOP#1\r\n",
+                "#00b34d3c$GPRMC,140026.000,A,2623.6452,S,02828.8990,E,0.00,65.44,130213,,,A*4B\r\n"));
+
+        verifyPositions(decoder, text(
+                "#123456789000001#V3338#0000#SMS#3\r\n",
+                "#25ee0dff$GPRMC,083945.180,A,2233.4249,N,11406.0046,E,0.00,315.00,251207,,,A*6E\r\n",
+                "#25ee0dff$GPRMC,083950.180,A,2233.4249,N,11406.0046,E,0.00,315.00,251207,,,A*6E\r\n",
+                "#25ee0dff$GPRMC,083955.180,A,2233.4249,N,11406.0046,E,0.00,315.00,251207,,,A*6E"));
+
+        verifyPositions(decoder, text(
+                "#353686009063310#353686009063310#0000#AUTO#2\r\n",
+                "#239757a9$GPRMC,150252.001,A,2326.6856,S,4631.8154,W,,,260513,,,A*52\r\n",
+                "#239757a9$GPRMC,150322.001,A,2326.6854,S,4631.8157,W,,,260513,,,A*55"));
+
+        verifyPositions(decoder, text(
+                "#357671031289215#V600#0000#AUTOLOW#1\r\n",
+                "#00735e1c$GPRMC,115647.000,A,5553.6524,N,02632.3128,E,0.00,0.0,130614,0.0,W,A*28"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TlvProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/TlvProtocolDecoderTest.java
new file mode 100644
index 000000000..0aaf567e8
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TlvProtocolDecoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TlvProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TlvProtocolDecoder decoder = new TlvProtocolDecoder(null);
+
+        verifyNull(decoder, binary(
+                "30430f383630323437303330303934333931ff10393233323132323030303834353433340f533636385f415f56312e30315f454eff1130303a30433a45373a30303a30303a30300132"));
+
+        verifyNull(decoder, binary(
+                "30410f383630323437303330303934333931"));
+
+        verifyNull(decoder, binary(
+                "30420f3836303234373033303039343339310131"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TmgFrameDecoderTest.java b/src/test/java/org/traccar/protocol/TmgFrameDecoderTest.java
new file mode 100644
index 000000000..4f7be1b28
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TmgFrameDecoderTest.java
@@ -0,0 +1,23 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TmgFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TmgFrameDecoder decoder = new TmgFrameDecoder();
+
+        verifyFrame(
+                binary("24696f662c3836343530323033373939393630342c323238323133323031372c383132343238302c302c3239393133363231362e2d3438323235383537362ca52c313337393234353339382e3831383733343637362c142c2d36393936393937332e302c313135333435343433372e2d313938363833343039322c3439323039373739392c32302c302c2d3332302c302c4c4c4c4c2c4e4e544e2c48482c302e31372c332e30312c3330313131363030312c302c56455230302e3161"),
+                decoder.decode(null, null, binary("111538360b383634353032303337393939363034eb0b1c8d00ffff23000000000000000000000000000000001c9401008c320c00188901000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000044ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00000000000000000000000000001d940100c8950100bd0024696f662c3836343530323033373939393630342c323238323133323031372c383132343238302c302c3239393133363231362e2d3438323235383537362ca52c313337393234353339382e3831383733343637362c142c2d36393936393937332e302c313135333435343433372e2d313938363833343039322c3439323039373739392c32302c302c2d3332302c302c4c4c4c4c2c4e4e544e2c48482c302e31372c332e30312c3330313131363030312c302c56455230302e31610a000195010090960100bd0024746d702c3836343530323033373939393630342c323238323133323031372c383132343238302c302c3239393133363231362e2d3438323235383537362ca52c313337393234353339382e3831383733343637362c142c2d36393936393937332e302c313135333435343433372e2d313938363833343039322c3439323039373739392c32302c302c2d3237372c302c4c4c4c4c2c4e4e544e2c48482c302e31372c332e30312c3330313131363030312c302c56455230302e31610a00c9950100289701008b002462616b2c3836343530323033373939393630342c32313131323031372c3132303230312c312c323832362e353938312c4e2c30373731382e363436352c452c3030302e302c3239382e35322c35323834372c32322c332c2d3233392c302c4c4c4c4c2c4e4e544e2c48482c302e32342c332e30332c3330313131363030312c302c56455230302e31610a00000091960100c09701008b002462616b2c3836343530323033373939393630342c32313131323031372c3132303231322c312c323832362e353938312c4e2c30373731382e363437322c452c3030302e302c3037392e34322c35323834372c32332c332c2d3230352c302c4c4c4c4c2c4e4e544e2c48482c302e31352c332e30332c3330313131363030312c302c56455230302e31610a00000029970100589801008a002462616b2c3836343530323033373939393630342c32313131323031372c3132303232322c312c323832362e353938302c4e2c30373731382e363438352c452c3030302e302c3037372e332c35323834372c32332c332c2d3137342c302c4c4c4c4c2c4e4e544e2c48482c302e31382c332e30332c3330313131363030312c302c56455230302e31610a00000000c1970100f09801008a002462616b2c3836343530323033373939393630342c32313131323031372c3132303233312c312c323832362e353936342c4e2c30373731382e363437312c452c3030302e302c3133312e352c35323834372c32322c342c2d3134362c302c4c4c4c4c2c4e4e544e2c48482c302e31392c332e30332c3330313131363030312c302c56455230302e31610a0000000059980100889901008b002462616b2c3836343530323033373939393630342c32313131323031372c3132303234332c312c323832362e353935382c4e2c30373731382e363436382c452c3030302e302c3133392e36362c35323834372c32322c342c2d3132312c302c4c4c4c4c2c4e4e544e2c48482c302e31322c332e30332c3330313131363030312c302c56455230302e31610a000000f1980100209a01008a002462616b2c3836343530323033373939393630342c32313131323031372c3132303235332c312c323832362e353934392c4e2c30373731382e363436")));
+
+        verifyFrame(
+                binary("246c6f632c3836343530323033303335323734342c32393131323031372c3038333034392c312c323533342e363733312c4e2c30383733342e363735352c452c3033382e302c3037372e31392c35343234312c362c31312c3130302c302c48484c4c2c4e4e4e4e2c48482c302e31342c332e31312c3330313131363030312c332c56455230302e3161"),
+                decoder.decode(null, null, binary("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")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TmgProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/TmgProtocolDecoderTest.java
new file mode 100644
index 000000000..5df2378d9
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TmgProtocolDecoderTest.java
@@ -0,0 +1,54 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TmgProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TmgProtocolDecoder decoder = new TmgProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$loc,869309013800417,08032014,094459,1,2826.1956,N,07659.7690,E,0.0,2.5,4441,31,6,95,1,LLLL,NNTN,HH,0.15,0.26,HR38AU1389,0,SW0.1a"));
+
+        verifyPosition(decoder, text(
+                "$bak,864502037999604,21112017,120243,1,2826.5958,N,07718.6468,E,000.0,139.66,52847,22,4,-174,0,LLLL,NNTN,HH,0.12,3.03,301116001,0,VER00.1a"));
+
+        verifyNull(decoder, text(
+                "$iof,864502037999604,2282132017,8124280,0,299136216.-482258576,¥,1379245398.818734676,,-69969973.0,1153454437.-1986834092,492097799,20,0,-320,0,LLLL,NNTN,HH,0.17,3.01,301116001,0,VER00.1a"));
+
+        verifyPosition(decoder, text(
+                "$nor,L,868325023006341,14022017,103947,1,2836.6542,N,07706.2504,E,0.0,0.0,0.0,0.0,0,22,VODAFONE - DELH,15,49B7,1,2.57,13.2,00000010,00000000,0111,00.0,00.0,0.0,SW10.12,NA,#"));
+
+        verifyPosition(decoder, text(
+                "$rid,L,868325023006341,14022017,103706,1,2836.6542,N,07706.2504,E,0.0,0.0,0.0,0.0,0,22,VODAFONE - DELH,15,49B7,1,2.57,13.2,00000011,00000000,0111,00.0,00.0,0.0,SW10.12,0004909463,#"));
+
+        verifyPosition(decoder, text(
+                "$ion,H,868324023777431,27012017,101057,4,2830.2952,N,07705.2532,E,0.0,202.38,225.9,1.22,8,20,N.A,0,N.A,1,4.09,00.0,00000111,00000000,1101,00.0-00.0,00.0-0.0,4.42,01.02,#"));
+
+        verifyPosition(decoder, text(
+                "$iof,H,868324023777431,27012017,101111,4,2830.2952,N,07705.2532,E,0.0,202.38,225.9,0.87,11,21,N.A,25,N.A,0,4.09,00.0,00000111,00000000,1110,00.0-00.0,00.0-0.0,4.42,01.02,#"));
+
+        verifyPosition(decoder, text(
+                "$rmv,L,868324023777431,27012017,101141,4,2830.2952,N,07705.2532,E,0.0,202.38,225.9,0.86,12,21,VODAFONE - DELH,24,3220,0,4.11,00.0,00000111,00000000,1110,00.0-00.0,00.0-0.0,4.42,01.02,#"));
+
+        verifyPosition(decoder, text(
+                "$rnc,H,868324023777431,27012017,101013,4,2830.2923,N,07705.2551,E,0.0,9.65,226.0,0.88,12,21,VODAFONE - DELH,28,3220,0,4.14,07.4,00000111,00000000,1111,00.0-00.0,00.0-0.0,4.42,01.02,#"));
+
+        verifyPosition(decoder, text(
+                "$ebl,H,868324023777431,27012017,101046,4,2830.2923,N,07705.2551,E,0.0,9.65,226.0,0.97,11,21,VODAFONE - DELH,25,3220,0,4.11,00.0,00000111,00000000,1110,00.0-00.0,00.0-0.0,4.42,01.02,#"));
+
+        verifyPosition(decoder, text(
+                "$nor,L,868324023777431,17012017,001023,4,2830.2977,N,07705.2478,E,0.0,207.07,229.2,0.97,11,22,IDEA CELLULAR L,18,DCDE,0,4.09,12.9,00000111,00000000,1111,00.0-00.0,00.0-0.0,3.59,01.02,#"));
+
+        verifyPosition(decoder, text(
+                "$nor,L,868324023777431,17012017,001523,4,2830.2939,N,07705.2527,E,0.0,50.96,236.5,1.05,11,21,IDEA CELLULAR L,18,DCDE,0,4.09,12.8,00000111,00000000,1111,00.0-00.0,00.0-0.0,3.59,01.02,#"));
+
+        verifyPosition(decoder, text(
+                "$nor,L,869309999985699,24062015,094459,4,2826.1956,N,07659.7690,E,67.5,2.5,167,0.82,15,22,airtel,31,4441,1,4.1,12.7,00000011,00000011,1111,0.0,0.0,21.3,SW00.01,#"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TopflytechProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/TopflytechProtocolDecoderTest.java
new file mode 100644
index 000000000..666a48bfa
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TopflytechProtocolDecoderTest.java
@@ -0,0 +1,18 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TopflytechProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TopflytechProtocolDecoder decoder = new TopflytechProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "(880316890094910BP00XG00b600000000L00074b54S00000000R0C0F0014000100f0130531152205A0706.1395S11024.0965E000.0251.25"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TotemFrameDecoderTest.java b/src/test/java/org/traccar/protocol/TotemFrameDecoderTest.java
new file mode 100644
index 000000000..8fb5f8d54
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TotemFrameDecoderTest.java
@@ -0,0 +1,35 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TotemFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TotemFrameDecoder decoder = new TotemFrameDecoder();
+
+        verifyFrame(
+                binary("24243030323542423836323031303033373239343836313345"),
+                decoder.decode(null, null, binary("24243030323542423836323031303033373239343836313345")));
+
+        verifyFrame(
+                binary("24243030363545363836313137323033353932363639357c3137303931323135333235372c2d37392e3337333835332c34332e3736353631392c302c302c7c3441"),
+                decoder.decode(null, null, binary("24243030363545363836313137323033353932363639357c3137303931323135333235372c2d37392e3337333835332c34332e3736353631392c302c302c7c3441")));
+
+        verifyFrame(
+                binary("24243031303841413836343234343032363036333433377c3141303030303030313430313031303130313031343131313030303032374241304535373030333130303030303030302e3030303030303030303030302e303030304e30303030302e3030303045303438313536"),
+                decoder.decode(null, null, binary("24243031303841413836343234343032363036333433377c3141303030303030313430313031303130313031343131313030303032374241304535373030333130303030303030302e3030303030303030303030302e303030304e30303030302e3030303045303438313536")));
+
+        verifyFrame(
+                binary("242442393335363839353033373537383531387c4141244750524d432c3036313730382e3030302c412c333734302e323033332c4e2c30323132382e383132312c452c33382e38352c3237322e33362c3132313131332c2c2c412a35327c30322e337c30312e337c30312e397c3030303030303030303030307c32303133313131323036313730387c31343034313430327c30303030303030307c30303245323137317c303030307c302e323137327c383930327c34463945"),
+                decoder.decode(null, null, binary("242442393335363839353033373537383531387c4141244750524d432c3036313730382e3030302c412c333734302e323033332c4e2c30323132382e383132312c452c33382e38352c3237322e33362c3132313131332c2c2c412a35327c30322e337c30312e337c30312e397c3030303030303030303030307c32303133313131323036313730387c31343034313430327c30303030303030307c30303245323137317c303030307c302e323137327c383930327c344639450d0a")));
+
+        verifyFrame(
+                binary("242442393335363839353033373537383531387c4141244750524d432c3036313730382e3030302c412c333734302e323033332c4e2c30323132382e383132312c452c33382e38352c3237322e33362c3132313131332c2c2c412a35327c30322e337c30312e337c30312e397c3030303030303030303030307c32303133313131323036313730387c31343034313430327c30303030303030307c30303245323137317c303030307c302e323137327c383930327c34463945"),
+                decoder.decode(null, null, binary("0d0a242442393335363839353033373537383531387c4141244750524d432c3036313730382e3030302c412c333734302e323033332c4e2c30323132382e383132312c452c33382e38352c3237322e33362c3132313131332c2c2c412a35327c30322e337c30312e337c30312e397c3030303030303030303030307c32303133313131323036313730387c31343034313430327c30303030303030307c30303245323137317c303030307c302e323137327c383930327c344639450d0a")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TotemProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/TotemProtocolDecoderTest.java
new file mode 100644
index 000000000..287c54968
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TotemProtocolDecoderTest.java
@@ -0,0 +1,116 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TotemProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TotemProtocolDecoder decoder = new TotemProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$$0113AA862010037348253|588040001901220851494212000000753AE901655121700100000.800000002632.6084S02803.3289E29497E"),
+                position("2019-01-22 08:51:49.000", true, -26.54347, 28.05548));
+
+        verifyPosition(decoder, text(
+                "$$011602867119025755430|50099800180420045019401400000000000000B8797D110816811201.500002132615.7037S02801.8099E056149"));
+
+        verifyPosition(decoder, text(
+                "$$0108AB863835028447675|5004C0001710250234064214059828A058AE121010604000.600000320304.7772N10134.8238E11625B"));
+
+        verifyPosition(decoder, text(
+                "$$0108AA863835028447675|5004C0001710250234134114057728A058AE112108305100.600000660304.7787N10134.8719E116458"));
+
+        verifyPosition(decoder, text(
+                "$$0112AA864244026065291|180018001409160205244011000027BA0E57063100000001.200000002237.8119N11403.5075E05202D"));
+
+        verifyPosition(decoder, text(
+                "$$0116AA864244026065291|18001800140916020524401100000000000027BA0E57063100000001.200000002237.8119N11403.5075E052020"));
+
+        verifyPosition(decoder, text(
+                "$$0116AA867119025683137|108000001611020925324112000000000000616027F7001300000099.900000000000.0000N00000.0000E531824"));
+
+        verifyPosition(decoder, text(
+                "$$0128AA864244026065291|18001800140916020524401100000000000000000000000027BA0E57063100000001.200000002237.8119N11403.5075E05202D"));
+
+        verifyPosition(decoder, text(
+                "$$0128AA867965024919124|10010800160223032415401203270321032103270189000027BA0E4E001800200001.000000002237.7581N11403.5088E000957"),
+                position("2016-02-23 03:24:15.000", false, 22.62930, 114.05848));
+
+        verifyPosition(decoder, text(
+                "$$0108AA863835024426319|18004000160216160756411100007DCD0000111000000000.800000000316.3519N10228.5086E126522"));
+
+        verifyPosition(decoder, text(
+                "$$0128AA867521029231005|1880100015101802314842140000000000000000000000001AB48366093127600000.900000000806.1947N09818.4795E080355"));
+
+        verifyPosition(decoder, text(
+                "$$0108AA864244026063437|1A0000001401010101014111000027BA0E57003100000000.000000000000.0000N00000.0000E048156"));
+
+        verifyPosition(decoder, text(
+                "$$BE863771024392112|AA$GPRMC,044704.000,A,1439.3334,N,12059.1417,E,0.00,0.00,200815,,,A*67|01.7|00.8|01.4|000000000000|20150820044704|14291265|00000000|4EECBF8B31|0000|0.0000|0002|00000|56E7"),
+                position("2015-08-20 04:47:04.000", true, 14.65556, 120.98570));
+
+        verifyPosition(decoder, text(
+                "$$AE860990002922822|AA$GPRMC,051002.00,A,0439.26245,N,10108.94448,E,0.023,,140315,,,A*71|02.98|01.95|02.26|000000000000|20150314051003|13841157|105A3B1C|0000|0.0000|0005|5324"),
+                position("2015-03-14 05:10:02.000", true, 4.65437, 101.14907));
+
+        verifyPosition(decoder, text(
+                "$$AE860990002922822|AA$GPRMC,051002.00,A,0439.26245,N,10108.94448,E,0.023,,140315,,,A*71|02.98|01.95|02.26|000000000000|20150314051003|13841157|105A3B1C|0000|0.0000|0005|5324\r"));
+
+        verifyNull(decoder, text(
+                "$$BB862170017856731|AA$GPRMC,000000.00,V,0000.0000,N,00000.0000,E,000.0,000.0,000000,,,A*73|00.0|00.0|00.0|000000001000|20000000000000|13790000|00000000|00000000|00000000|0.0000|0007|8C23"));
+
+        verifyPosition(decoder, text(
+                "$$B8862170017856731|AA$GPRMC,171849.00,A,3644.9893,N,01012.9927,E,0.049,51,200813,,,A*73|1.59|0.97|1.25|100000001000|20130820171849|13690000|00000000|019BD508|00000000|0.0000|0026|1B2C"));
+
+        verifyPosition(decoder, text(
+                "$$B2359772032984289|AA$GPRMC,104446.000,A,5011.3944,N,01439.6637,E,0.00,,290212,,,A*7D|01.8|00.9|01.5|000000100000|20120229104446|14151221|00050000|046D085E|0000|0.0000|1170|29A7"));
+
+        verifyPosition(decoder, text(
+                "$$8B862170017861566|AA180613080657|A|2237.1901|N|11402.1369|E|1.579|178|8.70|100000001000|13811|00000000|253162F5|00000000|0.0000|0014|2B16"),
+                position("2013-06-18 08:06:57.000", true, 22.61984, 114.03562));
+
+        verifyPosition(decoder, text(
+                "$$72862170017856731|3913090911165280000370000000000000000019BD508A0400000003.400000093644.9817N01012.9944E00506F2E"));
+
+        verifyPosition(decoder, text(
+                "$$B0456123|61$GPRMC,114725.00,A,1258.68276,N,07730.60237,E,0.410,,080113,,,A*79|1.44|0.66|1.27|000000000000|20130108114425|03600000|00000000|053C2BFE|0000|0.3325|0063|2005"));
+
+        verifyNull(decoder, text(
+                "$$AE359772033395899|AA000000000000000000000000000000000000000000000000000000000000|00.0|00.0|00.0|000000000000|20090215000153|13601435|00000000|00000000|0000|0.0000|0007|2DAA"));
+
+        verifyNull(decoder, text(
+                "$$AE359772033395899|AA000000000000000000000000000000000000000000000000000000000000|00.0|00.0|00.0|00000000|20090215001204|14182037|00000000|0012D888|0000|0.0000|0016|5B51"));
+
+        verifyNull(decoder, text(
+                "$$AE359772033395899|AA00000000000000000000000000000000000000000000000000000000000|00.0|00.0|00.0|00000000000|20090215001337|14182013|00000000|0012D888|0000|0.0000|0017|346E"));
+
+        verifyPosition(decoder, text(
+                "$$B3359772032399074|60$GPRMC,094859.000,A,3648.2229,N,01008.0976,E,0.00,,221211,,,A*79|02.3|01.3|02.0|000000000000|20111222094858|13360808|00000000|00000000|0000|0.0000|0001||A977"));
+
+        verifyPosition(decoder, text(
+                "$$B3359772032399074|09$GPRMC,094905.000,A,3648.2229,N,01008.0976,E,0.00,,221211,,,A*71|02.1|01.3|01.7|000000000000|20111222094905|03210533|00000000|00000000|0000|0.0000|0002||FA58"));
+
+        verifyPosition(decoder, text(
+                "$$B3359772032399074|AA$GPRMC,093911.000,A,3648.2146,N,01008.0977,E,0.00,,140312,,,A*7E|02.1|01.1|01.8|000000000000|20120314093910|04100057|00000000|0012D887|0000|0.0000|1128||C50E"));
+
+        verifyPosition(decoder, text(
+                "$$B3359772032399074|AA$GPRMC,094258.000,A,3648.2146,N,01008.0977,E,0.00,,140312,,,A*7F|02.1|01.1|01.8|000000000000|20120314094257|04120057|00000000|0012D887|0000|0.0000|1136||CA32"));
+
+        verifyPosition(decoder, text(
+                "$$B3359772032399074|AA$GPRMC,234603.000,A,3648.2179,N,01008.0962,E,0.00,,030412,,,A*74|01.8|01.0|01.5|000000000000|20120403234603|14251914|00000000|0012D888|0000|0.0000|3674||940B"));
+
+        verifyPosition(decoder, text(
+                "$$B3359772032399074|AA$GPRMC,234603.000,A,3648.2179,N,01008.0962,E,0.00,,030412,,,A*74|01.8|01.0|01.5|000000000000|20120403234603|14251914|00000000|0012D888|0000|0.0000|3674|940B"));
+        
+        verifyPosition(decoder, text(
+                "$$B2356895037578518|AA$GPRMC,173829.000,A,3740.4107,N,02129.9815,E,0.00,,111113,,,A*7B|02.6|01.6|02.1|000000000000|20131111173829|14041251|00000000|002E0DD7|0000|0.0240|6010|8128"));
+
+        verifyPosition(decoder, text(
+                "$$B2356895037578518|AA$GPRMC,203823.000,A,3740.3285,N,02129.9295,E,0.00,,111113,,,A*79|01.5|01.0|01.1|000000000000|20131111203823|14041251|00000000|002E0DD7|0000|0.0000|6371|3824"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TotemProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/TotemProtocolEncoderTest.java
new file mode 100644
index 000000000..5a47f74cc
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TotemProtocolEncoderTest.java
@@ -0,0 +1,25 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+import static org.junit.Assert.assertEquals;
+
+public class TotemProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        TotemProtocolEncoder encoder = new TotemProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(2);
+        command.setType(Command.TYPE_ENGINE_STOP);
+        command.set(Command.KEY_DEVICE_PASSWORD, "000000");
+        
+        assertEquals("*000000,025,C,1#", encoder.encodeCommand(command));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Tr20ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Tr20ProtocolDecoderTest.java
new file mode 100644
index 000000000..76355066b
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Tr20ProtocolDecoderTest.java
@@ -0,0 +1,31 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Tr20ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Tr20ProtocolDecoder decoder = new Tr20ProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "%%123456789012345,A,120101121800,N6000.0000E13000.0000,0,000,0,01034802,150,[Message]"));
+
+        verifyNull(decoder, text(
+                "%%TRACKPRO01,1"));
+
+        verifyPosition(decoder, text(
+                "%%868873457748532,A,181109121248,N2237.4181E11403.2857,000,282,NA,47010000,108"));
+
+        verifyPosition(decoder, text(
+                "%%TR-10,A,050916070549,N2240.8887E11359.2994,0,000,NA,D3800000,150,CFG:resend|"),
+                position("2005-09-16 07:05:49.000", true, 22.68148, 113.98832));
+
+        verifyPosition(decoder, text(
+                "%%TR-10,A,050916070549,N2240.8887E11359.2994,0,000,NA,D3800000,150,CFG:resend|"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Tr900ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Tr900ProtocolDecoderTest.java
new file mode 100644
index 000000000..92fe0da29
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Tr900ProtocolDecoderTest.java
@@ -0,0 +1,25 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Tr900ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Tr900ProtocolDecoder decoder = new Tr900ProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                ">00001001,4,1,150626,131252,W05830.2978,S3137.2783,,00,348,18,00,003-000,0,3,11111011*3b!"),
+                position("2015-06-26 13:12:52.000", true, -31.62131, -58.50496));
+
+        verifyPosition(decoder, text(
+                ">12345678,1,1,070201,144111,W05829.2613,S3435.2313,,00,034,25,00,126-000,0,3,11111111*2d!"));
+
+        verifyPosition(decoder, text(
+                ">00001001,4,1,150626,131252,W05830.2978,S3137.2783,,00,348,18,00,003-000,0,3,11111011*3b!\r\n"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TrackboxProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/TrackboxProtocolDecoderTest.java
new file mode 100644
index 000000000..e83824fb4
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TrackboxProtocolDecoderTest.java
@@ -0,0 +1,25 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TrackboxProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TrackboxProtocolDecoder decoder = new TrackboxProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "a=connect&v=11&i=111111111111111"));
+
+        verifyPosition(decoder, text(
+                "183457.999,5126.0247N,00002.8686E,5.2,70.4,3,57.63,32.11,17.32,150507,05"),
+                position("2007-05-15 18:34:57.999", true, 51.43375, 0.04781));
+
+        verifyPosition(decoder, text(
+                "183558.999,5126.3979N,00003.0745E,5.2,70.4,3,57.63,32.11,17.32,150507,05"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TrakMateProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/TrakMateProtocolDecoderTest.java
new file mode 100644
index 000000000..4352fc935
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TrakMateProtocolDecoderTest.java
@@ -0,0 +1,27 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TrakMateProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TrakMateProtocolDecoder decoder = new TrakMateProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "^TMSTP|352984083995323|116|13.07809|77.55979|131508|131118|0.0|146.51|7|0|71 -2 248|0|13.1|0.0|10.5|1|0|0|0|#"));
+
+        verifyPosition(decoder, text(
+                "^TMPER|354678456723764|1|12.59675|77.56789|123456|030414|2.3|34.0|1|0|0|0.015|3.9|12.0|23.4|23.4|1|1|0|#"));
+
+        verifyPosition(decoder, text(
+                "^TMALT|354678456723764|3|2|1|12.59675|77.56789|123456|030414|1.2|34.0|#"));
+
+        verifyPosition(decoder, text(
+                "^TMSRT|354678456723764|12.59675|77.56789|123456|030414|1.03|1.01|#"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TramigoFrameDecoderTest.java b/src/test/java/org/traccar/protocol/TramigoFrameDecoderTest.java
new file mode 100644
index 000000000..f482a00bb
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TramigoFrameDecoderTest.java
@@ -0,0 +1,23 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TramigoFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TramigoFrameDecoder decoder = new TramigoFrameDecoder();
+
+        verifyFrame(
+                binary("8000ed2bb0009c000101bee000050b09633d925b5472616d69676f3a205472697020737461727465642c2053686f636b2053656e736f722c206174204b696e6720437265656b20526f61642d46726565746f776e205374726565742c20506f727420486172636f7572742c205269766572732c204e472c20342e37363336312c20372e30313836382c2030373a31383a333620536570203320454f46"),
+                decoder.decode(null, null, binary("8000ed2bb0009c000101bee000050b09633d925b5472616d69676f3a205472697020737461727465642c2053686f636b2053656e736f722c206174204b696e6720437265656b20526f61642d46726565746f776e205374726565742c20506f727420486172636f7572742c205269766572732c204e472c20342e37363336312c20372e30313836382c2030373a31383a333620536570203320454f46")));
+
+        verifyFrame(
+                binary("80003d1ac0001c00010100000367152b13bc1d5970696e6720454f46"),
+                decoder.decode(null, null, binary("80003d1ac0001c00010100000367152b13bc1d5970696e6720454f46")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TramigoProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/TramigoProtocolDecoderTest.java
new file mode 100644
index 000000000..d35c5c54e
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TramigoProtocolDecoderTest.java
@@ -0,0 +1,63 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TramigoProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TramigoProtocolDecoder decoder = new TramigoProtocolDecoder(null);
+
+        verifyAttributes(decoder, binary(
+                "8000c426b000a6000101c557037598050d5c8a595472616d69676f3a204d6f76696e672c20302e3132206b6d2045206f66204c617275742054696e2049736c616d6963205072696d617279205363686f6f6c2c2054616970696e672c20506572616b2c204d592c20342e38333134392c203130302e37333038352c204e572077697468207370656564203130206b6d2f682c2030303a34393a30382041756720392020454f46"));
+
+        verifyAttributes(decoder, binary(
+                "8000c526b000a6000101f17d03759805115c8a595472616d69676f3a204d6f76696e672c20302e3133206b6d205345206f66204c617275742054696e2049736c616d6963205072696d617279205363686f6f6c2c2054616970696e672c20506572616b2c204d592c20342e38333132322c203130302e37333037382c204e4520776974682073706565642039206b6d2f682c2030303a34383a35332041756720392020454f46"));
+
+        verifyAttributes(decoder, binary(
+                "8000d426b0009f00010184f20375980593638a595472616d69676f3a204d6f76696e672c20302e3039206b6d204e57206f66204a616c616e2053696d70616e672042617475204d61726b65742c2054616970696e672c20506572616b2c204d592c20342e38333034332c203130302e37323230342c20532077697468207370656564203130206b6d2f682c2030313a32313a31322041756720392020454f46"));
+
+        verifyAttributes(decoder, binary(
+                "8000d626b0007f0001013c0b037598051d648a595472616d69676f3a2053746f707065642c206174204a616c616e2053696d70616e672042617475204d61726b65742c2054616970696e672c20506572616b2c204d592c20342e38323937322c203130302e37323233322c2030313a32323a34342041756720392020454f46"));
+
+        verifyNull(decoder, binary(
+                "80003d1ac0001c00010100000367152b13bc1d5970696e6720454f46"));
+
+        verifyAttributes(decoder, binary(
+                "8000d316b000860001018f8703771bee11fdf2585472616d69676f3a205061726b65642c20302e3131206b6d2053206f6620492e452e532e2050756572746120426f6e6974612c204361726162616e6368656c2c204d61647269642c2045532c2034302e33373736362c202d332e37333833352c2030353a3131204170722031362020454f46"));
+
+        verifyAttributes(decoder, binary(
+                "80009e08b00086000101bc1803778a59c58dea57546573742054323320547261636b65723a204d6f76696e672c20312e3639206b6d204e57206f66205574656b6f6e2c2045646f2c204e472c20362e34363137302c20352e36313938322c20452077697468207370656564203333206b6d2f682c2031363a3138205365702032372020454f46"));
+
+        verifyAttributes(decoder, binary(
+                "8000853eb000b8000101fcff032f14665a89e2564176656e7369732053797353657276653a2049676e6974696f6e206f6e2064657465637465642c206d6f76696e672c20302e3135206b6d205357206f66204261626120416e696d61736861756e205374726565742d426f64652054686f6d61732053742e2c20537572756c6572652c204c61676f7320436974792c204e472c20362e34383736352c20332e33343735352c2031303a3031204d6172203131202020454f46"));
+
+        verifyAttributes(decoder, binary(
+                "8000973eb000b90001012128032f14667794e2564176656e7369732053797353657276653a2049676e6974696f6e206f6e2064657465637465642c2073746f707065642c20302e3134206b6d205357206f66204261626120416e696d61736861756e205374726565742d426f64652054686f6d61732053742e2c20537572756c6572652c204c61676f7320436974792c204e472c20362e34383736372c20332e33343737332c2031303a3438204d6172203131202020454f46"));
+
+        verifyAttributes(decoder, binary(
+                "8000b73eb000ad000101fdd2032f1466c9cbe2564176656e7369732053797353657276653a2049676e6974696f6e206f6e2064657465637465642c206d6f76696e672c20302e3131206b6d2045206f6620416c68616a69204d6173686120526f616420466f6f746272696467652c20537572756c6572652c204c61676f7320436974792c204e472c20362e35303031342c20332e33353434332c2031343a3434204d6172203131202020454f46"));
+
+        verifyAttributes(decoder, binary(
+                "8000883eb000d3000101b223032f1466fc89e2564176656e7369732053797353657276653a2049676e6974696f6e206f66662064657465637465642c2049676e4f6e506572696f643a2030303a30323a34312c2073746f707065642c20302e3039206b6d205345206f66204a696e616475205072696d617279205363686f6f6c20416465204f6e6974696d6572696e2053742e2c20537572756c6572652c204c61676f7320436974792c204e472c20362e34383639332c20332e33343636302c2031303a3033204d6172203131202020454f46"));
+
+        verifyAttributes(decoder, binary(
+                "80009a3eb000d300010109ff032f1466b195e2564176656e7369732053797353657276653a2049676e6974696f6e206f66662064657465637465642c2049676e4f6e506572696f643a2030303a30353a31342c2073746f707065642c20302e3039206b6d205345206f66204a696e616475205072696d617279205363686f6f6c20416465204f6e6974696d6572696e2053742e2c20537572756c6572652c204c61676f7320436974792c204e472c20362e34383639312c20332e33343636322c2031303a3533204d6172203131202020454f46"));
+
+        verifyAttributes(decoder, binary(
+                "8000bc3eb000ba000101622c032f1466bacce2564176656e7369732053797353657276653a2049676e6974696f6e206f66662064657465637465642c2049676e4f6e506572696f643a2030303a30343a30302c206d6f76696e672c20617420416b6572656c6520526f61642d4f67756e6c616e612044726976652c20537572756c6572652c204c61676f7320436974792c204e472c20362e35303630332c20332e33353232382c2031343a3438204d6172203131202020454f46"));
+
+        verifyAttributes(decoder, binary(
+                "80001d3cb000b3000101160f032f1466b475e0564176656e7369732053797353657276653a205374617475732c204750533a203931252c2047534d3a203737252c20475052533a20436f6e6e65637465642c20626174746572793a20313030252c207265706f7274733a2049676e6974696f6e20286f6666292c205374617475732028352c322e302c3732302c3330292c20362e34393239382c20332e33343836352c2031393a3038204d6172203920454f46"));
+
+        verifyAttributes(decoder, binary(
+                "80005408b000af000101b23903677f00c8436d3842616c697365204f6e653a20416c6c756d616765206d61726368652064e974656374e92c20676172e92c20302e3735206b6d20452064652045636f6c65204175746f726f757465206465204b696e73686173612c2056696c6c65206465204b696e73686173612c204b696e73686173612c2043442c202d342e33343130362c2031352e33343931352c2030313a3030204a616e2031202020454f46"));
+
+        verifyAttributes(decoder, binary(
+                "8000011bb0009e0001015b93032ef6f35994a9545472616d69676f3a204d6f76696e672c20302e3930206b6d205345206f66204372616e6562726f6f6b20466972652053746174696f6e2c2050656e726974682c205379646e65792c2041552c202d33332e37303732322c203135302e37313735392c2053452077697468207370656564203337206b6d2f682c2031393a3438204a616e20342020454f46"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TrvProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/TrvProtocolDecoderTest.java
new file mode 100644
index 000000000..2fdb86218
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TrvProtocolDecoderTest.java
@@ -0,0 +1,67 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TrvProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TrvProtocolDecoder decoder = new TrvProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "TRVAP00352121088015548"));
+
+        verifyNotNull(decoder, text(
+                "IWAP02,zh_cn,0,6,260,1,11002|39252|9,11002|35112|23,11002|11043|24,11002|39253|24,11002|13751|24,11018|8102|26,3,a|c0-4a-00-b6-9c-f5|64&a|c0-4a-00-b6-9c-f5|64&a|18-a6-f7-92-35-da|84"));
+
+        verifyPosition(decoder, text(
+                "TRVAP01170905A5227.1382N00541.4256E001.7095844000.0008100610020100,204,8,3230,13007"));
+
+        verifyAttributes(decoder, text(
+                "TRVCP01,07800010010000602001206001120124"));
+
+        verifyNull(decoder, text(
+                "IWAP00353456789012345"));
+
+        verifyPosition(decoder, text(
+                "IWAP01080524A2232.9806N11404.9355E000.1061830323.8706000908000102,460,0,9520,3671,Home|74-DE-2B-44-88-8C|97& Home1|74-DE-2B-44-88-8C|97&Home2|74-DE-2B-44-88-8C|97& Home3|74-DE-2B-44-88-8C|97"));
+
+        verifyNotNull(decoder, text(
+                "IWAP02,zh_cn,0,7,460,0,9520|3671|13,9520|3672|12,9520|3673|11,9520|3674|10,9520|3675|9,9520|3676|8,9520|3677|7,4,1|D8-24-BD-79-FA-1F|59&2|3C-46-D8-6D-CE-01|81&3|0C-4C-39-1A-7C-65|69&4|70-A8-E3-5D-D7-C0|65"));
+
+        verifyPosition(decoder, text(
+                "IWAP10080524A2232.9806N11404.9355E000.1061830323.8706000908000502,460,0,9520,3671,00,zh-cn,00,HOME|74-DE-2B-44-88-8C|97&HOME1|74-DE-2B-44-88-8C|97&HOME2|74-DE-2B-44-88-8C|97&HOME3|74-DE-2B-44-88-8C|97"));
+
+        verifyNull(decoder, text(
+                "IWAP03,06000908000102,5555,30"));
+
+        verifyNull(decoder, text(
+                "TRVAP00353456789012345"));
+
+        verifyAttributes(decoder, text(
+                "TRVCP01,06000908000102"));
+
+        verifyAttributes(decoder, text(
+                "TRVCP01,100007100000001020151060011"));
+
+        verifyPosition(decoder, text(
+                "TRVAP01160211A2544.5118N05553.7586E105.711185941.52010001010010000,424,030,3011,27003"));
+
+        verifyPosition(decoder, text(
+                "TRVAP01160209A2540.8863N05546.6125E005.6075734123.7910000810010000,424,030,3012,27323"));
+
+        verifyPosition(decoder, text(
+                "TRVAP01080524A2232.9806N11404.9355E000.1061830323.8706000908000102,460,0,9520,3671"));
+
+        verifyPosition(decoder, text(
+                "TRVAP01080524A2232.9806N11404.9355E000.1061830323.8706000908000102,460,0,9520,3671"),
+                position("2008-05-24 06:18:30.000", true, 22.54968, 114.08226));
+
+        verifyPosition(decoder, text(
+                "TRVAP10080524A2232.9806N11404.9355E000.1061830323.8706000908000502,460,0,9520,3671,00,zh-cn,00"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Tt8850ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Tt8850ProtocolDecoderTest.java
new file mode 100644
index 000000000..e3833bcc7
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Tt8850ProtocolDecoderTest.java
@@ -0,0 +1,36 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Tt8850ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Tt8850ProtocolDecoder decoder = new Tt8850ProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "\u0000\u0004,007F,0,GTFRI,020102,867844000667538,4142726856,0,0,1,3,1.6,0,997.3,-66.830786,10.483394,20171212171418,0734,0004,041A,4220,69,20171212171657,FF61"));
+
+        verifyPosition(decoder, text(
+                "\u0000\u0004,005F,0,GTFRI,020100,135790246811220,,0,0,1,1,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,90,20090214093254,11F0"));
+        
+        verifyPosition(decoder, text(
+                "\u0000\u0004,005F,0,GTGEO,020100,135790246811220,,0,0,1,1,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,90,20090214093254,11F0"));
+
+        verifyPosition(decoder, text(
+                "\u0000\u0004,005F,0,GTNMR,020100,135790246811220,,0,0,1,1,4.3,92,70.0,121.354335,31.222073,20090214013254,0460,0000,18d8,6141,90,20090214093254,11F0"));
+
+        verifyPosition(decoder, text(
+                "\u0000\u0004,0017,0,GTNMR,,867844000400914,,0,41,1,2,0.0,0,1504.2,-75.569202,6.242850,20150404162835,,,,,97,20150404162836,05EF"));
+
+        verifyNull(decoder, text(
+                "\u0000\u0004,0017,0,GTPNA,,867844000400914,,0,0,1,0,,,,0,0,,,,,,99,20150404190153,0601"));
+
+        verifyPosition(decoder, text(
+                "\u0000\u0004,0017,0,GTEPN,,867844000400914,,0,0,1,0,0.0,0,1717.4,-75.598445,6.278578,20150405003116,,,,,95,20150405003358,0607"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TytanProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/TytanProtocolDecoderTest.java
new file mode 100644
index 000000000..ed75cee38
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TytanProtocolDecoderTest.java
@@ -0,0 +1,36 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TytanProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TytanProtocolDecoder decoder = new TytanProtocolDecoder(null);
+
+        verifyPositions(decoder, binary(
+                "B500192000001405125652CA9B1A325FC98D11A9990018020118FC0D"));
+
+        verifyPositions(decoder, binary(
+                "B500197800007422125652D7AC32325FD08D11A69900180200188280"));
+
+        verifyPositions(decoder, binary(
+                "B500181000001405115652DEEB2A325FC68D11A7D00005012A2AE1"));
+
+        verifyPositions(decoder, binary(
+                "B5005690000068494F561CEAE932325FD28D11A299000702000063045532030066013567018768014B6901286B0240396C04030785986D013E7F040000A7CE81040000A76C82027EAB83080FA01068FFFF0F3C880202583156"));
+        
+        verifyPositions(decoder, binary(
+                "b50069a00000689d315604512b32378f1a8e9fe094005a04d7c84b41020300ab250402140c0702c0006501006601006b0280646c0402883db0315604525732378f1d8e9fdd94005a04d7c84b41020300ab250402140c0702c0006501006601006b0280646c0402883db08887"));
+
+        verifyPositions(decoder, binary(
+                "b50028080000689d215602772f00378f1b8e9fdd98005a042efb3e4102030000000402140c070200000901"));
+
+        verifyPositions(decoder, binary(
+                "b500280a0000689d215602772f00378f1b8e9fdd98005a042efb3e4102030000000402140c07020000da20"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TzoneProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/TzoneProtocolDecoderTest.java
new file mode 100644
index 000000000..bd1fc71f4
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TzoneProtocolDecoderTest.java
@@ -0,0 +1,53 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class TzoneProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        TzoneProtocolDecoder decoder = new TzoneProtocolDecoder(null);
+
+        verifyAttributes(decoder, binary(
+                "545a005b24240406010800000866050033819630120911071824000472bd8e5b0008aac01b07019b04bb002f00040b06161154000e100132ff2006161152000e080096ff4606161151000e1e0101ff1406161156000db6405bff490024469e0d0a"));
+
+        verifyAttributes(decoder, binary(
+                "545a006624240406010800000866050033819630120911070e1d000472bd8e5b0008aac01b17019b04bc003a00050b06161151000e1e00ffff1406161152000e08008aff4706161154000e100134ff1f06161156000db0406cff4906161155000df44011ff4e0023811a0d0a"));
+
+        verifyPosition(decoder, binary(
+                "545a005624240111010e0000086169303626931411091b151d2600160801de26ec002f633411091b151d2500000000160c0000040d2a34df000eaa4000001b37016000000000319c0000000000000000000000000000003a84240d0a"));
+
+        verifyPosition(decoder, binary(
+                "545a005024240153011000000863835025559464110103080a22001609011bed79245964a9110103080a22000a0000550c00000604396f04222c000daac000151701a204870000000000000003000959000546190d0a"));
+
+        verifyPosition(decoder, binary(
+                "545A005224240153010E000008638350256668551008130616090016050079F63D2527FAF710081306160900A000002F0D33000803015B07013D7976000DAAE0400537016C049E000000000000000300800002B65EEA0D0A"));
+
+        verifyPosition(decoder, binary(
+                "545a00582424010b022000000860041028904798100803030c2700160a007da96203356669100803030c2700000000000e000004002813730010aa4000000617017100000000000080000000000000000000000000000000007701fe0d0a"));
+
+        verifyPosition(decoder, binary(
+                "545a00582424010b022000000860041028904798100803030d1a001609007da9620335666a100803030d1900000000000e000004002813730010aa400000063701720000000000008000000000000000000000000000000000787f0c0d0a"));
+
+        verifyPosition(decoder, binary(
+                "545a00582424010b021e000008637710239476270f080b0a3228001600000000000000000000000000000000000000000000000401a00822001088c00020183701a6053800000000800000000000000000000000000000000077c9860d0a"),
+                position("1999-11-30 00:00:00.000", false, 0.0, 0.0));
+
+        verifyPosition(decoder, binary(
+                "545A00912424010B021E000008661040203754350F061807083800160400CE5ADC041447620F0618070838000A0000060C7C0004253378370010AAC000000C37018504E500000000800000000000000000390B0A0014061113000000051200140610600014061220001000133800140610070010001473001000151100101500640010000920001000148400000000000000F2EF570D0A"),
+                position("2015-06-24 07:08:56.000", true, 22.53946, 114.06310));
+
+        verifyAttributes(decoder, binary(
+                "545A009E2424010A0205000008637710225481290F010F081E33000000000010A0C000310E35000005840000000000000000000000000066140A00140612200010001511001406101000140612490014061308001015006400051400170014061012000000050200140612470000000504001406100700140612510014061260001015012000000005080014061252001406130900101501410000000506000853A40D0A"));
+
+        verifyAttributes(decoder, binary(
+                "545A00992424010A0205000008637710225481290F010F082634000000000010A0C000311035000005870000000000000000000000000061130A000000050800101500640014061251001406130800051400170010150141001406101000140612200014061309000000050200140610070014061260001406124900140612470014061012001406125200100015110010150120000000050400183E8A0D0A"));
+
+        verifyAttributes(decoder, binary(
+                "545A00942424010A0205000008637710225481290F010F091C1F000000000010A1C000310F3500000586000000000000000000000000005C120A001406101000140612490014061012001406125200000005040000000502001015012000000005080010001511001406122000140612600014061247001406130900140610070010150141000514001700140612510010150064007A907C0D0A"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/UlbotechFrameDecoderTest.java b/src/test/java/org/traccar/protocol/UlbotechFrameDecoderTest.java
new file mode 100644
index 000000000..d3d0429d6
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/UlbotechFrameDecoderTest.java
@@ -0,0 +1,29 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assert.assertEquals;
+
+public class UlbotechFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        UlbotechFrameDecoder decoder = new UlbotechFrameDecoder();
+
+        assertEquals(
+                binary("f8010103515810532780699f7e2e3f010e015ee4c906bde45c00000000008b0304004000000404002c776005060373193622110b00240b00fee8ffff807dffff606d0b00fee9af000000af0000000b00feee7d78807dffffffff100101cc2af8"),
+                decoder.decode(null, null, binary("f8010103515810532780699f7e2e3f010e015ee4c906bde45c00000000008b0304004000000404002c776005060373193622110b00240b00fee8ffff807dffff606d0b00fee9af000000af0000000b00feee7d78807dffffffff100101cc2af8")));
+
+        assertEquals(
+                binary("2a545330312c33353430343330353133383934363023"),
+                decoder.decode(null, null, binary("2a545330312c33353430343330353133383934363023")));
+
+        assertEquals(
+                binary("f8010108679650230646339de69054010e015ee17506bde2c60000000000ac0304024000000404000009f705060390181422170711310583410c0000310d00312f834131018608040003130a100101136cf8"),
+                decoder.decode(null, null, binary("f8010108679650230646339de69054010e015ee17506bde2c60000000000ac0304024000000404000009f70005060390181422170711310583410c0000310d00312f834131018608040003130a100101136cf8")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/UlbotechProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/UlbotechProtocolDecoderTest.java
new file mode 100644
index 000000000..1c29ccd4a
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/UlbotechProtocolDecoderTest.java
@@ -0,0 +1,90 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class UlbotechProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        UlbotechProtocolDecoder decoder = new UlbotechProtocolDecoder(null);
+
+        verifyNull(decoder, buffer(
+                "*TS01,353323081464660#"));
+
+        verifyAttributes(decoder, buffer(
+                "*TS01,868323025245751,134955140317,WFE:0#"));
+
+        verifyPosition(decoder, binary(
+                "f8010103515810532780699f7e2e3f010e015ee4c906bde45c00000000008b0304004000000404002c776005060373193622110b00240b00fee8ffff807dffff606d0b00fee9af000000af0000000b00feee7d78807dffffffff100101cc2af8"));
+
+        verifyPosition(decoder, binary(
+                "F8010103596580420045259CFB3329010E015ED91506BDE5A800000000009E030402420000040400492AA405060344197E220D071131058F410C1591310D48312F8F413107C60804027666B00C138254D182607A826EE083BE554385F50019423CAD1DF8"));
+
+        verifyNotNull(decoder, binary(
+                "F8010108683230231070781EA3676E020BFFFFFFFFFFFFFFFFFFFF780304000000030404000002C20506032A1790220E100101AC72F8"));
+
+        verifyNotNull(decoder, binary(
+                "f8010108683230220996561ea6ce1c020bffffffffffffffffffff78030400000000040400087b710506035519ad2214060800000000000000006220f8"));
+
+        verifyAttributes(decoder, binary(
+                "f8010108683230220996561ea6ce3f020b02cc00114e86000002f153030400000000040400087b710506035619a4221406080000000000000000fbcff8"));
+
+        verifyAttributes(decoder, binary(
+                "f8010108683230211861161e9d8c48020b00de0063eb730128b56161030400010001040400127d0705060174179422021005e000000001db06f8"));
+
+        verifyPosition(decoder, binary(
+                "f8010108683230220996561ea6cdf9010eff47465cfb68d7a000000000270f030400000000040400087b710506035119ba22140608000000000000000022cef8"));
+
+        verifyPosition(decoder, binary(
+                "f8010108683230220996561ea74274010eff47477bfb68d89000000000270f030400000000040400087b710506035419472214060800000000000000006661f8"));
+
+        verifyPosition(decoder, binary(
+                "f8010103515790566431569e5fbb9d010e015ee2b906bde4a000000000009f03040a4000000404000115fe05060340173f22030711310583410c0000310d00312f834131000008040000b78c09077320290082c021100101120af8"));
+
+        verifyNull(decoder, buffer(
+                "*TS01,354043051389460#"));
+
+        verifyPosition(decoder, binary(
+                "f8010108679650230646339de69054010e015ee17506bde2c60000000000ac0304024000000404000009f705060390181422170711310583410c0000310d00312f834131018608040003130a100101136cf8"));
+
+        verifyPosition(decoder, binary(
+                "f8010108679650230651689dc8e45b010e01194a26fbd47fa6001f003c0054030402420000040400024d7b0506037c18692212071131057f410c0ee0310d1b312f41413112ef0804000dd59fcc32f8"));
+
+        verifyPosition(decoder, binary(
+                "f8010103596580419465449da89d16010efe5580fe0923d82100140129005903040242000004040001a7f10506037818be220e070e31057b410c1324310d144131fa3208040020b1418297f8"));
+        
+        verifyPosition(decoder, binary(
+                "f8010103596580419465449da8564e010efe55a1800923d04b0000000000710304000000000404000178d2050603571876220ec3caf8"));
+        
+        verifyPosition(decoder, binary(
+                "f8010103545500500179009ccb4b62010e00144db906310d3f0000000000cb0304000000000404000a8123050603211860221006080000000100000000ef97f8"));
+
+        verifyPosition(decoder, binary(
+                "F80101035785203457289495D60235010E016175A506C2C838000000000064"));
+
+        verifyPosition(decoder, binary(
+                "F8010108621060211481299C4247FA010E015EE1D606BDE797000301370081030402420000040400523CAF050603921743220706080000000000000000071131058E410C0E30310D48312F8E4131046A080402C8F2545445F8"));
+        
+        verifyPosition(decoder, binary(
+                "F8010108621060211481299C4249FA010E015EE27506BDE80900020000008F030402420000040400523CAF05060392173F220706080000000000000000071131058E410C0E40310D48312F8E41310884080402CA60E43872F8"));
+
+        verifyNotNull(decoder, binary(
+                "f8010108653280262660481cdacf830209ffffffffffffffff780304000300000404000000030506017418a021f99697f8"));
+
+        verifyNotNull(decoder, binary(
+                "f801010865328026266048fffeae800209ffffffffffffffff7803040200000004040000000005060375175421f3060800000000000000009c28f8"));
+
+        verifyPosition(decoder, binary(
+                "f8010108653280262660489ce260b4010e01e757bd022340d7002b010d01570304020200000404000000260506036a17d42200060800000000000000000a0101ab9ff8"));
+
+        verifyPosition(decoder, binary(
+                "f8010108653280262660489ce260df010e01e756f30223384a0003010a02a80304020200000404000001280506036217fe22010608000000000000000005aaf8"));
+
+        verifyPosition(decoder, binary(
+                "f8010108653280262660489ce26128010e01e769ac022336290014010300730304020200000404000003c905060371181c2201060800000000000000000a0140e471f8"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/UproProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/UproProtocolDecoderTest.java
new file mode 100644
index 000000000..dbbe4591f
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/UproProtocolDecoderTest.java
@@ -0,0 +1,65 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class UproProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        UproProtocolDecoder decoder = new UproProtocolDecoder(null);
+
+        verifyPosition(decoder, buffer(
+                "*HQ200861810538000002,BA&A0206033302618209658563620115180119&B0100000040&C6328680=&F0039&R2710&V0036&T09&K50000&N04&P0200#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ200999999,AB1&A1656512233362911356523660000230618&B0100060010&C00000<6<&F0000&R2405&V0109&W0000003E&K00100&T65&X(k89860045191536000374)#"));
+
+        verifyPosition(decoder, buffer(
+                "*HQ20113800138000,YAA&A0732142233550011405829060520190314&B0100000000&C00001234&R3109&T80#"));
+
+        verifyPosition(decoder, binary(
+                "2a4d473230313836383530303032303030343836372c414226413035303032343138313438373536303636303131373732323030303031313132313626583331302c3236302c34383837322c353639312c37333b34383837322c3732322c38363b34383837322c353639332c38383b34383837322c323336332c39303b34383837322c323336322c393726423030303030303030303026573030264e3230265a31342659313430303323"));
+
+        verifyPosition(decoder, binary(
+                "2a4d473230303639333530323030303033353537332c42412641303834313237333332363334353230373033383933373630303030303235313131362642303130303030303030302647303036323030264d393930264e3235264f3035303026433030313a363b363926510411058c0c125c0d0a2fff4237ee614d66454c140826555f50000000000300000000000000000026543139333723"));
+
+        verifyPosition(decoder, buffer(
+                "*MG201693502000035441,BA&A1213073325458307036690710000151116&P0730000032ce4fb3&D1&B0000000000&C005799?7&S3,20161115120025,07035.54659E,3324.87721N,3000,0,0,0,0,847,599,8,40,0,19,20&U_P\0\0\0\0\0\0\0\0\0\0\0\0\0\0&T0107"));
+
+        verifyPosition(decoder, buffer(
+                "*MG201693502000034964,AB&A0800253335360507036975710000091116&P0730000032d2a94d&B0000000000&N13&Z12&U_P\0\0\0\u0004\0\0\0\0\0\0\0\0\0\0"),
+                position("2016-11-09 08:00:25.000", true, -33.58934, -70.61626));
+
+        verifyNull(decoder, buffer(
+                "*MG20113800138000,AH"));
+
+        verifyPosition(decoder, buffer(
+                "*MG201693502000034964,AB&A0200183324418107033792800009051116&B0000000000&N15&Z94&U_P\0\0\0\0\0\0\0\0\0\0\0\0\0\0"));
+
+        verifyPosition(decoder, buffer(
+                "*MG201693502000034964,AB&A0200543324412007033805910000051116&P0730000032d66785&B0000000000&N15&Z92&U_P\0\0\0\0\0\0\0\0\0\0\0\0\0\0"));
+
+        verifyPosition(decoder, buffer(
+                "*AI2000905447674,BA&A2003064913201201845107561627121016&B0100000000&C05>8=961&F0333&K023101002154A7"));
+
+        verifyPosition(decoder, buffer(
+                "*AI200905300036,AH&A0317264913209801844913060000251115&B0500000000&C0;4?72:9&F0000"),
+                position("2015-11-25 03:17:26.000", false, 49.22016, 18.74855));
+
+        verifyPosition(decoder, buffer(
+                "*AI2000905300036,AS&A1647304913209801844913060000251115&B0400000000&C0;4?72:9&F0000"));
+
+        verifyPosition(decoder, buffer(
+                "*AI2000905300036,AC1&A1648014913209801844913060000251115&B0400000000&C0;4?72:9&F0000"));
+
+        verifyPosition(decoder, buffer(
+                "*AI2000905300036,AB1&A1702464913231101844949860000251115&B0500000000&C0;4?72:9&F0000"));
+
+        verifyPosition(decoder, buffer(
+                "*AI2000905300036,AD1&A1703054913231101844949860000251115&B0500000000&C0;4?72:9&F0000"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/V680ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/V680ProtocolDecoderTest.java
new file mode 100644
index 000000000..e3761c3ef
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/V680ProtocolDecoderTest.java
@@ -0,0 +1,77 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class V680ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        V680ProtocolDecoder decoder = new V680ProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "#867967020910610#01234567890#1#0000#AUT#1#0500000000120000#114.036291,E,22.665795,N,111.00,000.00#111116#193333##"),
+                position("2016-11-11 19:33:33.000", true, 22.66579, 114.03629));
+
+        verifyPosition(decoder, text(
+                "#355488020168617##1#0000#AUT#01#260001a412966f#1834.790700,E,5302.748800,N,0.00,0.00#310316#174538.000##"));
+
+        verifyPosition(decoder, text(
+                "#355488020168617##1#0000#AUT#01##1834.770100,E,5302.742800,N,0.62,0.00#310316#211537.000##"));
+
+        verifyNull(decoder, text(
+                "#353588102019155"));
+
+        verifyPosition(decoder, text(
+                "#135790246811222#13486119277#1#0000#SOS#1#27bc10af#11407.4182,E,2232.7632,N,0.00,79.50#070709#134147.000##"));
+
+        verifyPosition(decoder, text(
+                "#356823031193431##0#0000#SF#1#72403#V#04702.3025,W,2252.18380,S,008.18,0#090413#134938"),
+                position("2013-04-09 13:49:38.000", false, -22.86973, -47.038375));
+
+        verifyPosition(decoder, text(
+                "#356823033219838#1000#0#1478#AUT#1#66830FFB#03855.6628,E,4716.6821,N,001.41,259#130812#143905"));
+
+        verifyPosition(decoder, text(
+                "#353588102019155##1#0000#AUT#01#7240060be7873f#4849.079800,W,2614.458200,S,0.00,0.00#130413#182110.000"));
+        
+        verifyPosition(decoder, text(
+                "#353588302045917##1#0000#AUT#01#7243141c2b14c3#4738.442300,W,2334.874000,S,0.00,0.30#170413#004831.000"));
+        
+        verifyPosition(decoder, text(
+                "#352897045085282##0#0000#AUT#1#72400510730208,00d36307,10734fc4#4647.8922,W,2339.1956,S,2.60,63.74#200413#094310.000"));
+        
+        verifyPosition(decoder, text(
+                "#356823033537791##0#0000#AUT#1#V#03610.2179,E,5004.5796,N,000.01,349#180513#073758"));
+        
+        verifyPosition(decoder, text(
+                "#356823031236214##0#0000#AUT#1#V#01904.5491,E,6941.0085,N,000.09,248#170513#160140"));
+        
+        verifyNull(decoder, text(
+                "#353588550032869##1#0000#AUT#01#72400401cd01a5#00000.0000,E,0000.0000,N,0.00,#000000#000000.000"));
+
+        verifyPosition(decoder, text(
+                "#352897045085282##0#0000#AUT#1#72400510730208,00d36307,10734fc4#4647.8922,W,2339.1956,S,2.60,63.74#200413#094310.000##"));
+        
+        verifyPosition(decoder, text(
+                "#352165050199210##13#0000#AUT#1#72400605471305,054712fd,054712ff#05144.0008,W,3005.5011,S,0.11,201.46#260713#172647.000##"));
+        
+        verifyPosition(decoder, text(
+                "#356823031166908#13001190527#0#0000#AUT#4#V#07136.4070,W,1040.0575,N,000.35,257#280813#142836#V#07136.4088,W,1040.0580,N,000.49,288#280813#142846#V#07136.4098,W,1040.0590,N,000.59,264#280813#142856#V#07136.4093,W,1040.0605,N,000.30,264#280813#142906##"));
+
+        verifyPosition(decoder, text(
+                "#355488020132015##1#0000#AUT#01#510089246a34c0#10641.338800,E,619.427100,S,0.00,0.00#011113#161942.000##"));
+        
+        verifyPosition(decoder, text(
+                "#359094025419110#bigfriend#0#1234#AUTO#1##04632.8846,W,2327.2264,S,0.00,0.00#220913#234808##"));
+        
+        verifyPosition(decoder, text(
+                "#353588102031599##1#0000#AUT#01#41300304843fc1#7955.124400,E,642.095500,N,5.28,95.21#041213#074431.000##"));
+        
+        verifyPosition(decoder, text(
+                "1#0000#AUT#01#23403007fa650e#16.747700,W,5136.356500,N,0.00,0.00#040415#002051.000"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/VisiontekProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/VisiontekProtocolDecoderTest.java
new file mode 100644
index 000000000..11596945e
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/VisiontekProtocolDecoderTest.java
@@ -0,0 +1,40 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class VisiontekProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        VisiontekProtocolDecoder decoder = new VisiontekProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$1,117,28,01,16,15,05,48,1725.0518N,07824.5298E,0620,11,0,185,2062,0,0,0,1,1,1,1,24,00.0000,00.3740,00.0000,VAJRA V1.00,A"));
+
+        verifyPosition(decoder, text(
+                "$1,VMC,358072044271838,26,10,15,10,43,20,17.066418N,080.395667E,000.0,285,00.8,0074,6390,0,0,0,0,0,0,0,0,00.00,00.00,00,00,0000,12.7,4.0,24,10,0000000000000,A,0"));
+
+        verifyNull(decoder, text(
+                "$1,VMC,358072044271838,25,10,15,09,19,40,00.0000000,000.0000000,000.0,000,00.0,0000,6070,0,0,0,0,0,0,0,0,00.00,00.00,00,00,0000,12.5,4.0,99,00,0000000000000,V,0"));
+
+        verifyPosition(decoder, text(
+                "$1,AP116,05,06,15,11,48,32,1725.0460N,07824.5289E,0617,07,0,030,2091,0,0,0,1,1,1,1,20,00.0000,00.3820,00.0000,VAJRA V1.00,A"));
+
+        verifyPosition(decoder, text(
+                "$1,AP09BU9397,861785006462448,20,06,14,15,03,28,17267339N,078279407E,060.0,073,0550,11,0,1,0,0,1,1,26,A,0000000000"),
+                position("2014-06-20 15:03:28.000", true, 17.44556, 78.46567));
+
+        verifyNull(decoder, text(
+                "$1,AP09BU9397,861785006462448,20,06,14,15,03,28,000000000,0000000000,000.0,000,0000,00,0,1,0,0,1,1,24,V,0000000000"));
+        
+        verifyNull(decoder, text(
+                "$1,1234567890,02,06,11,17,07,45,00000000,000000000,00.0,0,0,V"));
+
+        verifyPosition(decoder, text(
+                "$1,1234567890,02,06,11,17,07,45,17267690N,078279340E,060.0,113,0,A"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Vt200FrameDecoderTest.java b/src/test/java/org/traccar/protocol/Vt200FrameDecoderTest.java
new file mode 100644
index 000000000..9422f6d74
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Vt200FrameDecoderTest.java
@@ -0,0 +1,23 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Vt200FrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Vt200FrameDecoder decoder = new Vt200FrameDecoder();
+
+        verifyFrame(
+                binary("28631037309456208400340102dc0906171616454415760201144494473f920a0c0000030500200100417c1f383a9d1090510000006a00007000000e00180ee129"),
+                decoder.decode(null, null, binary("28631037309456208400340102dc0906171616454415760201144494473f920a0c0000030500200100417c1f383a9d1090510000006a00007000000e00180ee129")));
+
+        verifyFrame(
+                binary("28631037309456208400340102f51306171327294418267501208948170231071f0000044300200100005f02180000667500000000000000000000080000624629"),
+                decoder.decode(null, null, binary("28631037309456208400340102f513061713273d144418267501208948170231071f0000044300200100005f02180000667500000000000000000000080000624629")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Vt200ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Vt200ProtocolDecoderTest.java
new file mode 100644
index 000000000..9c224bc8e
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Vt200ProtocolDecoderTest.java
@@ -0,0 +1,60 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Vt200ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Vt200ProtocolDecoder decoder = new Vt200ProtocolDecoder(null);
+
+        verifyPosition(decoder, binary(
+                "28192030961807208200210101b919011818375801245774036424612500160917000003aa008800007b00aa3429"));
+
+        verifyNull(decoder, binary(
+                "286310373094563082002701033d010817143327c68a14841e00c27f550e9a000000000c000000084700200120007d01af260b29"));
+
+        verifyAttributes(decoder, binary(
+                "2863103730945630880062033d862631037309456f222014604362936f010817140954010817144135076b00002a3800003b7d6127cc91040000000000000000000000005a0000088e000001ce02630000263b000009b401ff00000cb40000069c02af000018190200000102019729"));
+
+        verifyPosition(decoder, binary(
+                "286310373094562086002101033d010817143328441790420114817637207d090a00000847002001207f00d6f229"));
+
+        verifyPosition(decoder, binary(
+                "286310373094562086002101033d0108171433354417932101148139772c9d080a00000847002001207f00dc6729"));
+
+        verifyNull(decoder, binary(
+                "2863103730945600880012180108171433004418103801148375470000dd29"));
+
+        verifyNull(decoder, binary(
+                "28631037309456108800002e29"));
+
+        verifyAttributes(decoder, binary(
+                "2863103730945630880062033c862631037309456f222014604362936f01081713365601081713571904c800001b2c000034f66827f0840000000000000000000000000047000006e7000001b9022a000023ff000007f2018a00000a10000003f300cd00000d8d0300000302002729"));
+
+        verifyNull(decoder, binary(
+                "28631037309456008e000801042307171804584229"));
+
+        verifyNull(decoder, binary(
+                "28631037309456108800002e29"));
+
+        verifyPosition(decoder, binary(
+                "28631037309456208200210103302307171805444417097301147188170198090f0000073a002000007e00074429"));
+
+        verifyNull(decoder, binary(
+                "286310373094563089001200032f2107171740144417075001147188872c29"));
+
+        verifyAttributes(decoder, binary(
+                "2863103730945630880062032f862631037309456f222014604362936f21071717373221071717401400a100000cd700000004020d3c8e0000000000000000000000000000000000000000000000000000000000000000000a000000040000000e009700000cc9000000000000e929"));
+
+        verifyPosition(decoder, binary(
+                "28631037309456208400340102dc0906171616454415760201144494473f920a0c0000030500200100417c1f383a9d1090510000006a00007000000e00180ee129"));
+
+        verifyPosition(decoder, binary(
+                "28631037309456208400340102dc090617161654441577230114439597368c0a0c0000030500200100417c1baa349d3290510000006a00007000003d15004c11c629"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/VtfmsFrameDecoderTest.java b/src/test/java/org/traccar/protocol/VtfmsFrameDecoderTest.java
new file mode 100644
index 000000000..a5eb0b49b
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/VtfmsFrameDecoderTest.java
@@ -0,0 +1,21 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assert.assertEquals;
+
+public class VtfmsFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        VtfmsFrameDecoder decoder = new VtfmsFrameDecoder();
+
+        assertEquals(
+                buffer("(863071010087648,0HK44,00,000,14,2,9,,A,114946,180313,11.0244,076.9768,282,000,00000,00000,K,0000128,1,12.8,,200,2.501,,4.001,0,0,0,0,0,0,0,,)105"),
+                decoder.decode(null, null, buffer("(863071010087648,0HK44,00,000,14,2,9,,A,114946,180313,11.0244,076.9768,282,000,00000,00000,K,0000128,1,12.8,,200,2.501,,4.001,0,0,0,0,0,0,0,,)105")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/VtfmsProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/VtfmsProtocolDecoderTest.java
new file mode 100644
index 000000000..ede5dc7ac
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/VtfmsProtocolDecoderTest.java
@@ -0,0 +1,25 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class VtfmsProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        VtfmsProtocolDecoder decoder = new VtfmsProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "(861359037432331,0EF87,00,0,21,2,01,,A,154559,230119,1101.4046,07656.3859,241,000,00078,00000,K,0000812,1,12.7,,,,,,1,0,0,0,1,1,1,+919566531111*+919994462226,)054"),
+                position("2019-01-23 15:45:59.000", true, 11.02341, 76.93977));
+
+        verifyPosition(decoder, text(
+                "(865733028143493,00I76,00,000,,,,,A,133755,210617,10.57354,077.24912,SW,000,00598,00000,K,0017368,1,12.7,,,0.000,,,0,0,0,0,1,1,0,,)074"));
+
+        verifyPosition(decoder, text(
+                "(863071010087648,0HK44,00,000,14,2,9,,A,114946,180313,11.0244,076.9768,282,000,00000,00000,K,0000128,1,12.8,,200,2.501,,4.001,0,0,0,0,0,0,0,,)105"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/WatchFrameDecoderTest.java b/src/test/java/org/traccar/protocol/WatchFrameDecoderTest.java
new file mode 100644
index 000000000..4e40eea86
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/WatchFrameDecoderTest.java
@@ -0,0 +1,35 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class WatchFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        WatchFrameDecoder decoder = new WatchFrameDecoder();
+
+        verifyFrame(
+                binary("5b33472a3335323636313039303134333135302a303030412a4c4b2c302c302c3130305d"),
+                decoder.decode(null, null, binary("5b33472a3335323636313039303134333135302a303030412a4c4b2c302c302c3130305d")));
+
+        verifyFrame(
+                binary("5b33472a383330383430363237392a303030382a72636170747572655d"),
+                decoder.decode(null, null, binary("5b33472a383330383430363237392a303030382a72636170747572655d")));
+
+        verifyFrame(
+                binary("5b33472a383330383430363237392a303030392a4c4b2c302c302c38345d"),
+                decoder.decode(null, null, binary("5b33472a383330383430363237392a303030392a4c4b2c302c302c38345d")));
+
+        verifyFrame(
+                binary("5b5a4a2a3031343131313030313335303330342a303033342a303030392a4c4b2c302c302c31395d"),
+                decoder.decode(null, null, binary("5b5a4a2a3031343131313030313335303330342a303033342a303030392a4c4b2c302c302c31395d")));
+
+        verifyFrame(
+                concatenateBuffers(buffer("[CS*1234567890*000e*TK,#!AMR"), binary("7d5b5d2c2aff"), buffer("]")),
+                decoder.decode(null, null, concatenateBuffers(buffer("[CS*1234567890*000e*TK,#!AMR"), binary("7d017d027d037d047d05ff"), buffer("]"))));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/WatchProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/WatchProtocolDecoderTest.java
new file mode 100644
index 000000000..539e63253
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/WatchProtocolDecoderTest.java
@@ -0,0 +1,128 @@
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import org.junit.Test;
+import org.traccar.Context;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Position;
+
+import static org.junit.Assert.assertEquals;
+
+public class WatchProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        WatchProtocolDecoder decoder = new WatchProtocolDecoder(null);
+
+        verifyPosition(decoder, buffer(
+                "[ZJ*014111001332708*0075*0064*AL,040418,052156,A,22.536207,N,113.938673,E,0,0,0,5,100,82,1000,50,00100000,1,255,460,0,9340,3663,35]"));
+
+        verifyPosition(decoder, buffer(
+                "[SG*352661090143150*006C*UD,150817,132115,V,28.435142,N,81.354333,W,2.2038,000,99,00,70,100,0,50,00000000,1,1,310,260,1091,30082,139,,00]"));
+
+        verifyAttributes(decoder, buffer(
+                "[3G*4700609403*0013*bphrt,120,79,73,,,,]"));
+
+        verifyPosition(decoder, buffer(
+                "[3G*8308373902*0080*AL,230817,095346,A,47.083950,N,15.4821850,E,7.60,273.8,0.0,4,15,44,0,0,00200010,2,255,232,1,7605,42530,118,7605,58036,119,0,65.8]"));
+
+        verifyPosition(decoder, buffer(
+                "[SG*9051007430*006C*UD,150817,132115,V,28.435142,N,81.354333,W,2.2038,000,99,00,70,100,0,50,00000000,1,1,310,260,1091,30082,139,,00]"));
+
+        verifyPosition(decoder, buffer(
+                "[3G*6005412902*011F*WT,170517,133811,V,18.512200,N,73.7750283,E,0.00,0.0,0.0,0,92,82,4262,0,00000010,2,1,404,22,10125,8301,141,10125,13921,122,5,Skynet,28:c6:8e:be:87:c0,-60,Intel Wi-Fi,4c:60:de:32:3d:38,-70,Nirvanic-2,40:e3:d6:4a:d9:c2,-73,A4-Guest,40:e3:d6:4a:d9:c4,-73,A4Idatix,40:e3:d6:4a:d9:c3,-73,13.8]"));
+
+        verifyPosition(decoder, buffer(
+                "[3G*8308406279*00CC*UD3,170417,190930,V,54.739618,N,25.273213,E,0.0,323.53,175.1,6,51,83,0,0,00000000,1,1,246,01,200,13242758,51,3,TEO-189835,00:8c:54:58:1d:64,-84,Cgates_7137,78:54:2e:e3:71:37,-85,ASUS,9c:5c:8e:b8:d4:78,-93]"));
+
+        verifyPosition(decoder, buffer(
+                "[SG*9051004074*0058*AL,120117,145602,V,40.058413,N,76.336618,W,11.519,188,99,00,01,80,0,50,00000000,0,1,0,0,,10]"));
+
+        verifyPosition(decoder, buffer(
+                "[SG*9051000884*009B*UD,030117,161129,V,52.745450,N,0.369512,,0.1481,000,99,00,70,5,0,50,00000000,5,1,234,15,893,3611,135,893,3612,132,893,3993,131,893,30986,129,893,40088,126,,00]"));
+
+        verifyPosition(decoder, buffer(
+                "[3G*6430073509*00E7*UD2,241016,081622,V,09.951861,N,-84.1422119,W,0.00,0.0,0.0,0,39,94,0,0,00000000,1,0,712,3,2007,18961,123,4,Luz,00:23:6a:34:ee:76,-70,familia,b0:c5:54:b9:90:ef,-78,fam salas delgado,fc:b4:e6:5d:50:ea,-81,QWERTY,c8:3a:35:43:0f:e8,-93]"));
+
+        verifyPosition(decoder, buffer(
+                "[3G*6105117105*008D*UD2,210716,231601,V,-33.480366,N,-70.7630692,E,0.00,0.0,0.0,0,100,34,0,0,00000000,3,255,730,2,29731,54315,167,29731,54316,162,29731,54317,145]"),
+                position("2016-07-21 23:16:01.000", false, -33.48037, -70.76307));
+
+        verifyPosition(decoder, buffer(
+                "[3G*4700222306*0077*UD,120316,140610,V,48.779045,N, 9.1574736,E,0.00,0.0,0.0,0,25,83,0,0,00000000,2,255,262,1,21041,9067,121,21041,5981,116]"));
+
+        verifyPosition(decoder, buffer(
+                "[3G*4700222306*011F*UD2,120316,140444,A,48.779045,N, 9.1574736,E,0.57,12.8,0.0,7,28,77,0,0,00000000,2,2,262,1,21041,9067,121,21041,5981,116,5,WG-Superlativ,34:31:c4:c8:a9:22,-67,EasyBox-28E858,18:83:bf:28:e8:f4,-70,MoMaXXg,be:05:43:b7:19:15,-72,MoMaXX2,bc:05:43:b7:19:15,-72,Gastzugang,18:83:bf:28:e8:f5,-72]"));
+
+        verifyNull(decoder, buffer(
+                "[SG*9081000548*0009*LK,0,100]"));
+
+        verifyPosition(decoder, buffer(
+                "[SG*9081000548*00A9*UD,110116,113639,V,16.479064,S,68.119072,,0.7593,000,99,00,80,80,0,50,00000000,5,1,736,2,10103,10732,153,10103,11061,152,10103,11012,152,10103,10151,150,10103,10731,143,,00]"));
+
+        verifyPosition(decoder, buffer(
+                "[3G*2256002206*0079*UD2,100116,153723,A,38.000000,N,-9.000000,W,0.44,299.3,0.0,7,100,86,0,0,00000008,2,0,268,3,3010,51042,146,3010,51043,132]"));
+
+        verifyNull(decoder, buffer(
+                "[3G*8800000015*0003*TKQ]"));
+
+        verifyPosition(decoder, buffer(
+                "[3G*4700186508*00B1*UD,301015,084840,V,45.853100,N,14.6224899,E,0.00,0.0,0.0,0,84,61,0,11,00000008,7,255,293,70,60,6453,139,60,6432,139,60,6431,132,60,6457,127,60,16353,126,60,6451,121,60,16352,118]"));
+
+        verifyNull(decoder, buffer(
+                "[SG*8800000015*0002*LK]"));
+
+        verifyAttributes(decoder, buffer(
+                "[3G*4700186508*000B*LK,0,10,100]"));
+
+        verifyPosition(decoder, buffer(
+                "[SG*8800000015*0087*UD,220414,134652,A,22.571707,N,113.8613968,E,0.1,0.0,100,7,60,90,1000,50,0000,4,1,460,0,9360,4082,131,9360,4092,148,9360,4091,143,9360,4153,141]"),
+                position("2014-04-22 13:46:52.000", true, 22.57171, 113.86140));
+
+        verifyPosition(decoder, buffer(
+                "[SG*8800000015*0087*UD,220414,134652,A,22.571707,N,113.8613968,E,0.1,0.0,100,7,60,90,1000,50,0000,4,1,460,0,9360,4082,131,9360,4092,148,9360,4091,143,9360,4153,141]"));
+
+        verifyPosition(decoder, buffer(
+                "[SG*8800000015*0088*UD2,220414,134652,A,22.571707,N,113.8613968,E,0.1,0.0,100,7,60,90,1000,50,0000,4,1,460,0,9360,4082,131,9360,4092,148,9360,4091,143,9360,4153,141]"));
+
+        verifyPosition(decoder, buffer(
+                "[SG*8800000015*0087*AL,220414,134652,A,22.571707,N,113.8613968,E,0.1,0.0,100,7,60,90,1000,50,0001,4,1,460,0,9360,4082,131,9360,4092,148,9360,4091,143,9360,4153,141]"));
+
+        verifyAttributes(decoder, buffer(
+                "[CS*8800000015*0008*PULSE,72]"));
+
+        verifyAttributes(decoder, buffer(
+                "[3G*6005412902*0007*heart,0]"));
+
+        verifyAttributes(decoder, buffer(
+                "[3G*6005412902*0008*heart,71]"));
+
+        verifyPosition(decoder, buffer(
+                "[ZJ*014111001350304*0033*0064*UD,070318,020827,V,00.000000,N,000.000000,E,0,0,0,0,100,19,1000,50,00000000,1,255,460,0,9346,5223,42]"));
+
+        verifyPosition(decoder, buffer(
+                "[ZJ*014111001350304*0035*0097*UD,070318,020857,V,00.000000,N,000.000000,E,0,0,0,0,100,19,1000,50,00000000,5,255,460,0,9346,5223,42,9346,5214,21,9784,4083,13,9346,5222,11,9346,5221,8]"));
+
+        verifyPosition(decoder, buffer(
+                "[ZJ*014111001350304*0038*008a*UD,070318,021027,V,00.000000,N,000.000000,E,0,0,0,0,100,18,1000,50,00000000,4,255,460,0,9346,5223,42,9346,5214,20,9784,4083,11,9346,5221,5]"));
+
+    }
+
+    @Test
+    public void testDecodeVoiceMessage() throws Exception {
+
+        WatchProtocolDecoder decoder = new WatchProtocolDecoder(null);
+
+        verifyNull(decoder.decode(null, null, buffer("[CS*1234567890*0004*TK,1]")));
+
+        ByteBuf data = binary("7d5b5d2c2aff");
+
+        Object decodedObject = decoder.decode(null, null, concatenateBuffers(buffer("[CS*1234567890*000e*TK,#!AMR"), data.resetReaderIndex(), buffer("]")));
+        assertEquals("1234567890/mock.amr", ((Position) decodedObject).getAttributes().get("audio"));
+
+        verifyFrame(concatenateBuffers(buffer("#!AMR"), data.resetReaderIndex()), ((MockMediaManager) Context.getMediaManager()).readFile("1234567890/mock.amr"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/WatchProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/WatchProtocolEncoderTest.java
new file mode 100644
index 000000000..a0631be3b
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/WatchProtocolEncoderTest.java
@@ -0,0 +1,83 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+public class WatchProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        WatchProtocolEncoder encoder = new WatchProtocolEncoder();
+        
+        Command command;
+
+        command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_REBOOT_DEVICE);
+        verifyFrame(buffer("[CS*123456789012345*0005*RESET]"), encoder.encodeCommand(null, command));
+
+        command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_SOS_NUMBER);
+        command.set(Command.KEY_INDEX, 1);
+        command.set(Command.KEY_PHONE, "123456789");
+        verifyFrame(buffer("[CS*123456789012345*000e*SOS1,123456789]"), encoder.encodeCommand(null, command));
+
+        command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_VOICE_MESSAGE);
+        command.set(Command.KEY_DATA, "2321414d520a2573");
+        verifyFrame(buffer("[CS*123456789012345*000b*TK,#!AMR\n%s]"), encoder.encodeCommand(null, command));
+
+        command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_VOICE_MESSAGE);
+        command.set(Command.KEY_DATA, "7d5b5d2c2a");
+        verifyFrame(concatenateBuffers(buffer("[CS*123456789012345*000d*TK,"), binary("7d017d027d037d047d05"), buffer("]")), encoder.encodeCommand(null, command));
+
+        command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_VOICE_MESSAGE);
+        command.set(Command.KEY_DATA, "ff");
+        verifyFrame(concatenateBuffers(buffer("[CS*123456789012345*0004*TK,"), binary("ff"), buffer("]")), encoder.encodeCommand(null, command));
+
+        command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_MESSAGE);
+        command.set(Command.KEY_MESSAGE, "text");
+        verifyFrame(buffer("[CS*123456789012345*0018*MESSAGE,0074006500780074]"), encoder.encodeCommand(null, command));
+
+        command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_CUSTOM);
+        command.set(Command.KEY_DATA, "WORK,6-9,11-13,13-15,17-19");
+        verifyFrame(buffer("[CS*123456789012345*001a*WORK,6-9,11-13,13-15,17-19]"), encoder.encodeCommand(null, command));
+
+    }
+
+    @Test
+    public void testEncodeTimezone() {
+
+        WatchProtocolEncoder encoder = new WatchProtocolEncoder();
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_SET_TIMEZONE);
+
+        command.set(Command.KEY_TIMEZONE, "Europe/Amsterdam");
+        verifyFrame(buffer("[CS*123456789012345*0006*LZ,,+1]"), encoder.encodeCommand(null, command));
+
+        command.set(Command.KEY_TIMEZONE, "GMT+01:30");
+        verifyFrame(buffer("[CS*123456789012345*0008*LZ,,+1.5]"), encoder.encodeCommand(null, command));
+
+        command.set(Command.KEY_TIMEZONE, "Atlantic/Azores");
+        verifyFrame(buffer("[CS*123456789012345*0006*LZ,,-1]"), encoder.encodeCommand(null, command));
+
+        command.set(Command.KEY_TIMEZONE, "GMT-11:30");
+        verifyFrame(buffer("[CS*123456789012345*0009*LZ,,-11.5]"), encoder.encodeCommand(null, command));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/WialonProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/WialonProtocolDecoderTest.java
new file mode 100644
index 000000000..40b0469ea
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/WialonProtocolDecoderTest.java
@@ -0,0 +1,67 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class WialonProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        WialonProtocolDecoder decoder = new WialonProtocolDecoder(null);
+
+        verifyNull(decoder, text(
+                "#L#2.0;42001300083;;CE45"));
+
+        verifyNull(decoder, text(
+                "#L#123456789012345;test"));
+        
+        verifyNull(decoder, text(
+                "#L#2002;NA"));
+        
+        verifyNull(decoder, text(
+                "#P#"));
+
+        verifyPosition(decoder, text(
+                "#D#101118;061143;0756.0930;N;12338.6403;E;18.223;99.766;-4.000;10;0.800;NA;NA;NA;NA;101_521347:1:521249,101_521126:1:6593598,101_521127:1:774780,101_521072_21.1:1:0,101_521072_21.2:1:71353;F24A"));
+
+        verifyPosition(decoder, text(
+                "#D#151216;135910;5321.1466;N;04441.7929;E;87;156;265.000000;12;1.000000;241;NA;NA;NA;odo:2:0.000000,total_fuel:1:430087,can_fls:1:201,can_taho:1:11623,can_mileage:1:140367515"));
+
+        verifyPosition(decoder, text(
+                "#D#151216;140203;5312.59514;N;04830.37834;E;53;273;NA;10;NA;NA;NA;NA;NA;EvId:1:1,Board:2:12.81,Accum:2:4.28"));
+
+        verifyPosition(decoder, text(
+                "#SD#270413;205601;5544.6025;N;03739.6834;E;1;2;3;4"),
+                position("2013-04-27 20:56:01.000", true, 55.74338, 37.66139));
+
+        verifyPosition(decoder, text(
+                "#SD#021214;065947;2237.7552;N;11404.8851;E;0.000;;170.9;5"));
+
+        verifyPosition(decoder, text(
+                "#D#270413;205601;5544.6025;N;03739.6834;E;1;2;3;4;0.0;0;0;14.77,0.02,3.6;NA;count1:1:564,fuel:2:45.8,hw:3:V4.5"));
+        
+        verifyPosition(decoder, text(
+                "#D#190114;051312;4459.6956;N;04105.9930;E;35;306;204.000000;12;NA;452986639;NA;106.000000;NA;sats_gps:1:9,sats_glonass:1:3,balance:2:12123.000000,stay_balance:1:0"));
+        
+        verifyPosition(decoder, text(
+                "#D#021214;065947;2237.7552;N;11404.8851;E;0.000;;170.9;5;1.74;NA;NA;NA;NA;NA"));
+
+        verifyPosition(decoder, text(
+                "#D#021214;065947;2237.7552;N;11404.8851;E;0.000;;170.9;5;1.74;NA;NA;;NA;NA"));
+
+        verifyPositions(decoder, text(
+                "#B#080914;073235;5027.50625;N;03026.19321;E;0.700;0.000;NA;4;NA;NA;NA;;NA;Батарея:3:100 %|080914;073420;5027.50845;N;03026.18854;E;1.996;292.540;NA;4;NA;NA;NA;;NA;Батарея:3:100 %"));
+        
+        verifyPositions(decoder, text(
+                "#B#110914;102132;5027.50728;N;03026.20369;E;1.979;288.170;NA;NA;NA;NA;NA;;NA;Батарея:3:100 %"));
+
+        verifyPositions(decoder, text(
+                "#B#110315;045857;5364.0167;N;06127.8262;E;0;155;965;7;2.40;4;0;;NA;Uacc:2:3.4,Iacc:2:0.000,Uext:2:13.2,Tcpu:2:14.4,Balance:2:167.65,GPS:3:Off"));
+
+        verifyPositions(decoder, text(
+                "#B#110315;045857;5364.0167;N;06127.8262;E;0;155;965;7;2.40;4;0;14.77,0.02,3.6;AB45DF01145;"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/WondexFrameDecoderTest.java b/src/test/java/org/traccar/protocol/WondexFrameDecoderTest.java
new file mode 100644
index 000000000..642473f2d
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/WondexFrameDecoderTest.java
@@ -0,0 +1,28 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+public class WondexFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        WondexFrameDecoder decoder = new WondexFrameDecoder();
+
+        assertNull(
+                decoder.decode(null, null, binary("f0d70b0001ca9a3b")));
+
+        assertEquals(
+                binary("313034343938393630312c32303133303332333039353531352c31332e3537323737362c35322e3430303833382c302c3030302c37322c302c32"),
+                decoder.decode(null, null, binary("313034343938393630312c32303133303332333039353531352c31332e3537323737362c35322e3430303833382c302c3030302c37322c302c320d0a")));
+
+        assertEquals(binary("d0d70b0001ca9a3b"),
+                decoder.decode(null, null, binary("d0d70b0001ca9a3b")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/WondexProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/WondexProtocolDecoderTest.java
new file mode 100644
index 000000000..f01a763a1
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/WondexProtocolDecoderTest.java
@@ -0,0 +1,62 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class WondexProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        WondexProtocolDecoder decoder = new WondexProtocolDecoder(null);
+
+        verifyPosition(decoder, buffer(
+                "2000000108,20151030145404,76.948633,43.354700,0,140,15,100,1,1325,125.4,10.5,0.0"),
+                position("2015-10-30 14:54:04.000", true, 43.35470, 76.94863));
+
+        verifyPosition(decoder, buffer(
+                "2000000257,20151030145351,69.379976,53.283905,0,0,16,2,0,0,469.1,58.9,0.0"),
+                position("2015-10-30 14:53:51.000", true, 53.28390, 69.37998));
+
+        verifyPosition(decoder, buffer(
+                "2000000232,20151030145206,51.166900,43.651353,0,132,11,2,0,0,0.0,0.0,0.0"));
+
+        verifyPosition(decoder, buffer(
+                "2000000259,20151030145653,69.380826,53.283890,9,10,15,2,1,695,1002.6,108.2,0.0"));
+
+        verifyPosition(decoder, buffer(
+                "1044989601,20130323074605,0.000000,90.000000,0,000,0,0,2"));
+
+        verifyPosition(decoder, buffer(
+                "123456789000001,20120101123200,130.000000,60.000000,0,000,0,0,0,0"));
+
+        verifyPosition(decoder, buffer(
+                "210000001,20070313170040,121.123456,12.654321,0,233,0,9,2,0.0,0,0.00,0.00,0"));
+
+        verifyPosition(decoder, buffer(
+                "1044989601,20130322172647,13.572583,52.401070,22,204,49,0,2"));
+
+        verifyPosition(decoder, buffer(
+                "1044989601,20130322172647,13.572583,52.401070,22,204,-49,0,2"));
+
+        verifyPosition(decoder, buffer(
+                "3997324533,20140326074908,28.797603,47.041635,0,48,0,6,2,3.90V,0"));
+
+        verifyPosition(decoder, buffer(
+                "2000000001,20140529213210,-63.179111,9.781493,0,0,54.0,8,2,0.0,0,0.01,0.01,0,0,0,0"));
+
+        verifyNotNull(decoder, buffer(
+                "$OK:VER=M7 2.003 DVB rev02c,V2"));
+
+        verifyNotNull(decoder, buffer(
+                "$OK:REBOOT"));
+
+        verifyNotNull(decoder, buffer(
+                "$ERR:GETLOCATION=1"));
+
+        verifyNull(decoder, binary(
+                "d0d70b0001ca9a3b"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/WondexProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/WondexProtocolEncoderTest.java
new file mode 100644
index 000000000..8209fc412
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/WondexProtocolEncoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+import static org.junit.Assert.assertEquals;
+
+public class WondexProtocolEncoderTest extends ProtocolTest {
+    @Test
+    public void testEncode() throws Exception {
+
+        WondexProtocolEncoder encoder = new WondexProtocolEncoder();
+
+        Command command = new Command();
+        command.setDeviceId(2);
+        command.setType(Command.TYPE_POSITION_SINGLE);
+        command.set(Command.KEY_DEVICE_PASSWORD, "0000");
+
+        assertEquals("$WP+GETLOCATION=0000", encoder.encodeCommand(command));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/WristbandProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/WristbandProtocolDecoderTest.java
new file mode 100644
index 000000000..5635ce3d4
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/WristbandProtocolDecoderTest.java
@@ -0,0 +1,36 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class WristbandProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        WristbandProtocolDecoder decoder = new WristbandProtocolDecoder(null);
+
+        verifyNotNull(decoder, binary(
+                "000102004459583836383730343034343735303035357c56312e307c317c7b4630342331382c30372c332c3539303139322c33303a31382c30372c332c3539303139322c33307d0d0afffefc"));
+
+        verifyNotNull(decoder, binary(
+                "000102009c59583836383730343034343735303035357c56312e307c317c7b4630332330383a30353a38313a64383a31383a38372c2d37365f30303a37663a32383a63373a62613a63312c2d37375f39633a33643a63663a65643a62643a36622c2d36335f64383a65623a39373a65653a37373a32342c2d38327c31382c30372c332c3539303735342c33303a31382c30372c332c3539303735342c33307d0d0afffefc"));
+
+        verifyNull(decoder, binary(
+                "000102002259583836383730343034343735303035357c56312e307c307c7b46363423317d0d0afffefc"));
+
+        verifyPositions(decoder, binary(
+                "00010200bc59583836383730343034343735303035357c56312e307c317c7b4630322337372e3437373831372c2d33382e3839363239322c3230313831323239313235352c302e35387c37372e3437373739362c2d33382e3839363234352c3230313831323239313235352c302e30307c37372e3437373738392c2d33382e3839363233322c3230313831323239313235352c302e30307c37372e3437373737362c2d33382e3839363232322c3230313831323239313235352c302e30307d0d0afffefc"));
+
+        verifyNull(decoder, binary(
+                "000102004759583836383730343034343735303035357c56312e307c317c7b463931233331305f30307c30307c30307c30307c57414e444149323031382f31322f31342031353a35367d0d0afffefc"));
+
+        verifyNull(decoder, binary(
+                "000102004159583336373535313631303030303934347c56312e307c317c7b4639312330317c30307c30307c33475f7065745f323031382f30352f31362031313a30307d0d0afffefc"));
+
+        verifyPositions(decoder, false, binary(
+                "000102003559583836383730343034343735303035357c56312e307c317c7b4630312339342c312c3130302c302c33313030302c3930307d0d0afffefc"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/XexunFrameDecoderTest.java b/src/test/java/org/traccar/protocol/XexunFrameDecoderTest.java
new file mode 100644
index 000000000..8fc628bdb
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/XexunFrameDecoderTest.java
@@ -0,0 +1,25 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+import static org.junit.Assert.assertEquals;
+
+public class XexunFrameDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        XexunFrameDecoder decoder = new XexunFrameDecoder();
+
+        assertEquals(
+                binary("4750524d432c3230353933352e3030302c412c353134302e343335302c4e2c3530312e303638362c452c302e30302c302e30302c3132313031352c30302c303030302e302c412a37302c462c2c696d65693a3335393538373031343731383339322c"),
+                decoder.decode(null, null, binary("313531303132313435392c2b33313635323435343932372c4750524d432c3230353933352e3030302c412c353134302e343335302c4e2c3530312e303638362c452c302e30302c302e30302c3132313031352c30302c303030302e302c412a37302c462c2c696d65693a3335393538373031343731383339322c31323249")));
+
+        assertEquals(
+                binary("4750524d432c3130333733312e3633362c412c343534352e353236362c4e2c30303434382e383235392c452c32312e31322c3237362e30312c3135303631352c2c2c412a35372c4c2c2c20696d65693a3031333934393030323032363637352c"),
+                decoder.decode(null, null, binary("3135303631353132333733312c2b33333634373338343631312c4750524d432c3130333733312e3633362c412c343534352e353236362c4e2c30303434382e383235392c452c32312e31322c3237362e30312c3135303631352c2c2c412a35372c4c2c2c20696d65693a3031333934393030323032363637352c30342c333532322e392c463a332e3732562c302c3134322c32313734342c3230382c30312c303730322c394338430a0d")));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/XexunProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/XexunProtocolDecoderTest.java
new file mode 100644
index 000000000..8b0f245a2
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/XexunProtocolDecoderTest.java
@@ -0,0 +1,118 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class XexunProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        XexunProtocolDecoder decoder = new XexunProtocolDecoder(null, false);
+
+        verifyAttributes(decoder, text(
+                "GPRMC,.000,A,0.000000,S,0.0000,W,0.00,0.00,,00,0000.0,A*55,L,,imei:353579010727036,"));
+
+        verifyPosition(decoder, text(
+                "GPRMC,113518.000,A,5303.4150,N,10.2368,E,60.73,207.42,260216,00,0000.0,A*74,F,,imei:351525018007873,"));
+
+        verifyPosition(decoder, text(
+                "GPRMC,215853.000,A,5304.9600,N,6.7907,E,1.43,80.67,250216,00,0000.0,A*47,F,,imei:351525018007873,"));
+
+        verifyPosition(decoder, text(
+                "GPRMC,121535.000,A,5417.2666,N,04822.1264,E,1.452,30.42,031014,0.0,A*4D\r\n,L,imei:355227042011730,"));
+
+        verifyPosition(decoder, text(
+                "GPRMC,150120.000,A,3346.4463,S,15057.3083,E,0.0,117.4,010911,,,A*76,F,imei:351525010943661,"),
+                position("2011-09-01 15:01:20.000", true, -33.77411, 150.95514));
+
+        verifyPosition(decoder, text(
+                "GPRMC,010203.000,A,0102.0003,N,00102.0003,E,1.02,1.02,010203,,,A*00,F,,imei:10000000000000,"));
+
+        verifyPosition(decoder, text(
+                "GPRMC,233842.000,A,5001.3060,N,01429.3243,E,0.00,,210211,,,A*74,F,imei:354776030495631,"));
+
+        verifyPosition(decoder, text(
+                "GPRMC,080303.000,A,5546.7313,N,03738.6005,E,0.56,160.13,100311,,,A*6A,L,imei:354778030461167,"));
+
+        verifyPosition(decoder, text(
+                "GPRMC,220828.678,A,5206.1446,N,02038.2403,,0,0,160912,,,E*23,L,imei:358948012501019,"));
+
+        verifyPosition(decoder, text(
+                "GNRMC,134418.000,A,5533.8973,N,03745.4398,E,0.00,308.85,160215,,,A*7A,F,, imei:864244028033115,"));
+
+        verifyPosition(decoder, text(
+                "GPRMC,093341.000,A,1344.5716,N,10033.6648,E,0.00,0.00,240215,,,A*68,F,,imei:865328028306149,"));
+
+        verifyPosition(decoder, text(
+                "GPRMC,103731.636,A,4545.5266,N,00448.8259,E,21.12,276.01,150615,,,A*57,L,, imei:013949002026675,"));
+
+        verifyPosition(decoder, text(
+                "GPRMC,014623.000,A,4710.8260,N,1948.1220,E,0.11,105.40,111212,00,0000.0,A*49,F,,imei:357713002048962,"));
+
+        verifyPosition(decoder, text(
+                "GPRMC,043435.000,A,811.299200,S,11339.9500,E,0.93,29.52,160313,00,0000.0,A*65,F,,imei:359585014597923,"));
+
+        decoder = new XexunProtocolDecoder(null, true);
+
+        verifyPosition(decoder, text(
+                "171007160505,,GPRMC,160505.000,A,5323.4680,N,00252.4202,W,000.0,129.7,071017,,,A*7A,F,ACCStart, imei:864504031916915,10,41.1,F:4.28V,1,135,19824,234,15,0062,B7D5"));
+
+        verifyPosition(decoder, text(
+                "171007160525,,GPRMC,160525.000,A,5323.4680,N,00252.4202,W,000.0,129.7,071017,,,A*78,F,ACCStop, imei:864504031916915,10,41.1,F:4.28V,1,134,42896,234,15,0062,B7D5"));
+
+        verifyPosition(decoder, text(
+                "170505103845,TELKOMSEL,GPRMC,103845.000,A,0340.2482,N,09841.9689,E,0.00,68.23,050517,,,A*5D,F,ACC On, imei:013227002782161,05,-8.2,F:4.22V,1,141,44712,510,10,2BE5,EC47"));
+
+        verifyPosition(decoder, text(
+                "170607031932,+6282167979090,GPRMC,031932.000,A,0347.2515,N,09841.9433,E,0.00,261.22,070617,,,A*6C,F,ACC OFF, imei:013226004613135,11,23.1,F:4.25V,1,148,44989,510,10,2B34,0268"));
+        
+        verifyNull(decoder, text(
+                ",+48606717068,,L,, imei:012207005047292,,,F:4.28V,1,52,11565,247,01,000E,1FC5"));
+
+        verifyPosition(decoder, text(
+                "130302125349,+79604870506,GPRMC,085349.000,A,4503.2392,N,03858.5660,E,6.95,154.65,020313,,,A*6C,F,, imei:012207007744243,03,-1.5,F:4.15V,1,139,28048,250,01,278A,5072"),
+                position("2013-03-02 08:53:49.000", true, 45.05399, 38.97610));
+
+        verifyPosition(decoder, text(
+                "111111120009,+436763737552,GPRMC,120009.590,A,4639.6774,N,01418.5737,E,0.00,0.00,111111,,,A*68,F,, imei:359853000144328,04,481.2,F:4.15V,0,139,2689,232,03,2725,0576"));
+
+        verifyPosition(decoder, text(
+                "111111120009,+436763737552,GPRMC,120600.000,A,6000.0000,N,13000.0000,E,0.00,0.00,010112,,,A*68,F,help me!, imei:123456789012345,04,481.2,F:4.15V,0,139,2689,232,03,2725,0576"));
+
+        verifyPosition(decoder, text(
+                "111111120009,+436763737552,GPRMC,120600.000,A,6000.0000,N,13000.0000,E,0.00,0.00,010112,,,A*68,F,help me!, imei:123456789012345,04,481.2,L:3.5V,0,139,2689,232,03,2725,0576"));
+
+        verifyPosition(decoder, text(
+                "111111120009,436763737552,GPRMC,120600.000,A,6000.0000,N,13000.0000,E,0.00,0.00,010112,,,A*68,F,help me!, imei:123456789012345,04,481.2,L:3.5V,0,139,2689,232,03,2725,0576"));
+
+        verifyPosition(decoder, text(
+                "111111120009,+1234,GPRMC,204530.4,A,6000.0000,N,13000.0000,E,0.0,,010112,0.0,E,A*68,F,imei:123456789012345,04,123.5,F:3.55V,0,139,,232,03,272CE1,0576"));
+
+        verifyPosition(decoder, text(
+                "111111120009,+1234,GPRMC,204530.4,A,6000.000,N,01000.6288,E,0.0,0.00,230713,0.0,E,A*3C,F,imei:123456789012345,00,,F:3.88V,0,125,,262,01,224CE1,379B"));
+
+        verifyPosition(decoder, text(
+                "111111120009,+1234,GPRMC,215840.7,A,6000.000,N,01000.6253,E,0.0,0.00,230713,0.0,E,A*34,F,imei:123456789012345,00,,F:3.9V,0,124,,262,01,224CE1,379B"));
+
+        verifyPosition(decoder, text(
+                "130725134142,,GPRMC,134142.591,A,3845.6283,N,00909.8876,W,2.08,287.33,250713,,,A*71,F,, imei:013227000526784,03,-50.7,L:3.69V,0,128,65337,268,03,177A,119F"));
+        
+        verifyPosition(decoder, text(
+                "140602152533,TESCO_INFO,GPRMC,152533.000,A,5145.4275,N,00000.3448,E,0.00,0.00,020614,,,A*66,F,, imei:013227002781643,06,35.1,F:4.15V,1,135,38950,234,10,10B4,5235"));
+
+        verifyPosition(decoder, text(
+                "150216154418,5277,GNRMC,134418.000,A,5533.8973,N,03745.4398,E,0.00,308.85,160215,,,A*7A,F,, imei:864244028033115,10,169.8,F:4.28V,1,132,48269,250,99,6D0D,8572"));
+
+        verifyPosition(decoder, text(
+                "150224173341,+66961544651,GPRMC,093341.000,A,1344.5716,N,10033.6648,E,0.00,0.00,240215,,,A*68,F,,imei:865328028306149,05,106.4,F:4.01V/ADC1=0.20V/ADC2=0.00V,0,159,955,520,01,5DE8,0399,6.21km"));
+
+        verifyPosition(decoder, text(
+                "150316182840,07872167745,GPRMC,182840.000,A,5126.1310,N,00055.5573,W,0.00,0.00,160315,,,A*7C,F,,imei:865328023469306,06,54.3,F:4.10V/ADC1=0.76V/ADC2=0.00V,0,157,38486,234,10,34DC,48A6,3.70km"));
+
+        verifyPosition(decoder, text(
+                "150615123731,+33647384611,GPRMC,103731.636,A,4545.5266,N,00448.8259,E,21.12,276.01,150615,,,A*57,L,, imei:013949002026675,04,3522.9,F:3.72V,0,142,21744,208,01,0702,9C8C"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/XirgoProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/XirgoProtocolDecoderTest.java
new file mode 100644
index 000000000..f795742fd
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/XirgoProtocolDecoderTest.java
@@ -0,0 +1,76 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class XirgoProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecodeCustom() throws Exception {
+
+        XirgoProtocolDecoder decoder = new XirgoProtocolDecoder(null);
+
+        decoder.setForm("UID,EV,D,T,LT,LN,AL,GSPT,HD,SV,HP,BV,CQ,GS,SI,IG,OT");
+
+        verifyPosition(decoder, text(
+                "$$183900034,4002,03/30/2019,02:15:22,46.848577,-114.022213,978,0.0,172.3,16,1.2,13.291,20,3,2,2,1##"));
+
+        verifyPosition(decoder, text(
+                "$$184800793,4002,03/30/2019,02:10:13,46.848600,-114.022256,9723,0.0,1645,17,1.2,13.283,18,3,89011703278246523594,2,0##"));
+
+        decoder.setForm("UID,EV,D,T,LT,LN,AL,GSPT,SV,HP,BV,CQ,MI,GS,SI,IG,OT");
+
+        verifyPosition(decoder, text(
+                "$$184800793,4002,03/15/2019,21:30:21,46.848582,-114.022237,9733,0.0,18,1.1,13.605,20,0,3,89011703278246523602,2,0##"));
+
+    }
+
+    @Test
+    public void testDecodeNew() throws Exception {
+
+        XirgoProtocolDecoder decoder = new XirgoProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$$352054058132185,4001,2017/04/21,00:01:05,32.54659,-116.90670,143.2,0,0,0,598,0.0,12,0.9,765840,7.0,14.5,19,1,1,0011,8.5,63.2,5,21999,184,255,671,207,100,185##"));
+
+        verifyPosition(decoder, text(
+                "$$352054058132185,6011,2017/04/21,04:57:10,32.49658,-116.85957,250.9,0,0,0,602,0.0,12,0.8,765876,7.0,14.1,21,1,1,0011,10.1,0.0,5,170917890,280,255,627,0,100,167##"));
+
+        verifyPosition(decoder, text(
+                "$$355922061611345,6001,2016/08/25,20:10:51,51.13042,-114.22752,1197,44.7,0.0,0.0,2622,27,12,0.8,1,0.0,13.9,24,1,0,0.0,-70,-809,688##"));
+
+        verifyPosition(decoder, text(
+                "$$355922061611345,6001,2016/08/25,20:10:38,51.12948,-114.22637,1203,34.8,0.0,0.0,1377,215,12,0.8,1,0.0,13.8,28,1,0,0.0,-309,-566,754##"));
+
+        verifyPosition(decoder, text(
+                "$$354898045650537,6031,2015/02/26,15:47:26,33.42552,-112.30308,287.8,0,0,0,0,0.0,7,1.2,2,0.0,12.2,22,1,0,82.3"));
+
+        verifyPosition(decoder, text(
+                "$$355922060162167,6015,2016/04/21,17:26:52,39.83267,-76.66139,230,0.0,0.0,0.0,779,0,8,1.2,0,0.0,13.0,19,1,1C4BJWDG4GL191009,X0z1-1137CD1,0402,3GATT,0,83.9,-70,-715,738##"));
+
+        verifyPosition(decoder, text(
+                "$$355922060162167,4002,2016/04/21,17:04:50,39.83253,-76.66102,232,0.0,0.0,0.0,0,0,12,1.2,0,0.0,9.2,15,1,0,0.0,35,-8,1059##"));
+
+    }
+
+    @Test
+    public void testDecodeOld() throws Exception {
+
+        XirgoProtocolDecoder decoder = new XirgoProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "$$354660046140722,6001,2013/01/22,15:36:18,25.80907,-80.32531,7.1,19,165.2,11,0.8,11.1,17,1,1,3.9,2##"),
+                position("2013-01-22 15:36:18.000", true, 25.80907, -80.32531));
+
+        verifyPosition(decoder, text(
+                "$$357207059646786,4003,2015/05/19,15:54:56,-20.21422,-70.14927,37.5,1.8,0.0,11,0.8,12.9,31,297,1,0,0.0,0.0,0,1,1,1##"));
+
+        verifyPosition(decoder, text(
+                "$$354898045650537,6031,2015/02/26,15:47:26,33.42552,-112.30308,287.8,0,0,0,0,0.0,7,1.2,2,0.0,12.2,22,1,0,82.3"));
+
+        verifyPosition(decoder, text(
+                "$$357207059646786,4003,2015/05/19,15:55:27,-20.21421,-70.14920,33.6,0.4,0.0,11,0.8,12.9,31,297,1,0,0.0,0.0,0,1,1,1##"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/XirgoProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/XirgoProtocolEncoderTest.java
new file mode 100644
index 000000000..dd2e939c9
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/XirgoProtocolEncoderTest.java
@@ -0,0 +1,26 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+import static org.junit.Assert.assertEquals;
+
+public class XirgoProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        XirgoProtocolEncoder encoder = new XirgoProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_OUTPUT_CONTROL);
+        command.set(Command.KEY_INDEX, 0);
+        command.set(Command.KEY_DATA, 1);
+        
+        assertEquals("+XT:7005,2,1", encoder.encodeCommand(command));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Xrb28ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Xrb28ProtocolDecoderTest.java
new file mode 100644
index 000000000..0f15f31b4
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Xrb28ProtocolDecoderTest.java
@@ -0,0 +1,33 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Xrb28ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Xrb28ProtocolDecoder decoder = new Xrb28ProtocolDecoder(null);
+
+        verifyAttributes(decoder, text(
+                "*SCOR,OM,123456789123456,Q0,412,80,28#"));
+
+        verifyPosition(decoder, text(
+                "*SCOR,OM,867584030387299,D0,0,012102.00,A,0608.00062,S,10659.70331,E,12,0.69,151118,30.3,M,A#"));
+
+        verifyAttributes(decoder, text(
+                "*SCOR,OM,863158022988725,H0,0,412,28,80,0#"));
+
+        verifyAttributes(decoder, text(
+                "*HBCR,OM,123456789123456,R0,0,55,1234,1497689816#"));
+
+        verifyPosition(decoder, text(
+                "*HBCR,OM,123456789123456,D0,0,124458.00,A,2237.7514,N,11408.6214,E,6,0.21,151216,10,M,A#"));
+
+        verifyPosition(decoder, text(
+                "*SCOR,OM,863158022988725,D0,0,124458.00,A,2237.7514,N,11408.6214,E,6,0.21,151216,10,M,A#"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Xrb28ProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/Xrb28ProtocolEncoderTest.java
new file mode 100644
index 000000000..49476d694
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Xrb28ProtocolEncoderTest.java
@@ -0,0 +1,39 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+import static org.junit.Assert.assertEquals;
+
+public class Xrb28ProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncodePositionPeriodic() {
+
+        Xrb28ProtocolEncoder encoder = new Xrb28ProtocolEncoder();
+        
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_POSITION_PERIODIC);
+        command.set(Command.KEY_FREQUENCY, 300);
+        
+        assertEquals("\u00ff\u00ff*SCOS,OM,123456789012345,D1,300#\n", encoder.encodeCommand(null, command));
+
+    }
+
+    @Test
+    public void testEncodeCustom() {
+
+        Xrb28ProtocolEncoder encoder = new Xrb28ProtocolEncoder();
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_CUSTOM);
+        command.set(Command.KEY_DATA, "S7,0,3,0,0,20,25");
+
+        assertEquals("\u00ff\u00ff*SCOS,OM,123456789012345,S7,0,3,0,0,20,25#\n", encoder.encodeCommand(null, command));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Xt013ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Xt013ProtocolDecoderTest.java
new file mode 100644
index 000000000..aa44929ab
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Xt013ProtocolDecoderTest.java
@@ -0,0 +1,25 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Xt013ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Xt013ProtocolDecoder decoder = new Xt013ProtocolDecoder(null);
+        
+        verifyPosition(decoder, text(
+                "TK,862950021650364,150131090859,+53.267863,+5.767363,0,38,12,0,F,204,08,C94,336C,24,,4.09,1,,,,,,,,"),
+                position("2015-01-31 09:08:59.000", true, 53.26786, 5.76736));
+
+        verifyPosition(decoder, text(
+                "TK,862950021650364,150118113832,+53.267722,+5.767143,0,86,12,0,F,204,08,C94,336C,22,,4.21,1,,,,,,,,"));
+        
+        verifyPosition(decoder, text(
+                "HI,862950021650364TK,862950021650364,150118113832,+53.267722,+5.767143,0,86,12,0,F,204,08,C94,336C,22,,4.21,1,,,,,,,,"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/Xt2400ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Xt2400ProtocolDecoderTest.java
new file mode 100644
index 000000000..f4a78b5bd
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/Xt2400ProtocolDecoderTest.java
@@ -0,0 +1,25 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class Xt2400ProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        Xt2400ProtocolDecoder decoder = new Xt2400ProtocolDecoder(null);
+
+        decoder.setConfig("\n:wycfg pcr[0] 001001030406070809570a13121714100565\n");
+
+        verifyPosition(decoder, binary(
+                "000a344f1f0259766ae002074289f8f1c4b200e80000026712068000130000029300883559464255524845364650323433343235"));
+
+        decoder.setConfig("\n:wycfg pcr[0] 000f01030406070809570a131217141005\n");
+
+        verifyPosition(decoder, binary(
+                "0009c4fb9b0b58a771e4020742d9f8f1c4c300bc0000000011077c0015000000000001"));
+
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/YwtProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/YwtProtocolDecoderTest.java
new file mode 100644
index 000000000..332d15fa5
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/YwtProtocolDecoderTest.java
@@ -0,0 +1,31 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+
+public class YwtProtocolDecoderTest extends ProtocolTest {
+
+    @Test
+    public void testDecode() throws Exception {
+
+        YwtProtocolDecoder decoder = new YwtProtocolDecoder(null);
+
+        verifyPosition(decoder, text(
+                "%RP,1222102985:1,170509033842,E102.146563,N14.582175,,0,320,10,0,00-00-00-00-00-00-00-00-00-00-00-00,,1db2-02b3-52004,3>941.523-32,7>1,19>-16,20>30.9V"));
+        
+        verifyNull(decoder, text(
+                "%SN,0417061042:0,0,140117041203,404"));
+
+        verifyPosition(decoder, text(
+                "%GP,3000012345:0,090723182813,E114.602345,N22.069725,,30,160,4,0,00,,2794-10FF-46000,3>0-0"));
+
+        verifyPosition(decoder, text(
+                "%RP,3000012345:0,090807182815,E114.602345,N22.069725,,30,160,4,0,00"),
+                position("2009-08-07 18:28:15.000", true, 22.06973, 114.60235));
+
+        verifyPosition(decoder, text(
+                "%KP,3000012345:0,090807183115,E114.602345,N22.069725,,30,160,5,0,00;"));
+
+    }
+
+}