Pass a Protocol object to encoders

84 files changed, 280 insertions, 59 deletions

diff --git a/src/main/java/org/traccar/BaseProtocolEncoder.java b/src/main/java/org/traccar/BaseProtocolEncoder.java
index 6d96280f7..69d1fe6f5 100644
--- a/src/main/java/org/traccar/BaseProtocolEncoder.java
+++ b/src/main/java/org/traccar/BaseProtocolEncoder.java
@@ -27,6 +27,18 @@ public abstract class BaseProtocolEncoder extends ChannelOutboundHandlerAdapter
 
     private static final Logger LOGGER = LoggerFactory.getLogger(BaseProtocolEncoder.class);
 
+    private static final String PROTOCOL_UNKNOWN = "unknown";
+
+    private final Protocol protocol;
+
+    public BaseProtocolEncoder(Protocol protocol) {
+        this.protocol = protocol;
+    }
+
+    public String getProtocolName() {
+        return protocol != null ? protocol.getName() : PROTOCOL_UNKNOWN;
+    }
+
     protected String getUniqueId(long deviceId) {
         return Context.getIdentityManager().getById(deviceId).getUniqueId();
     }
diff --git a/src/main/java/org/traccar/StringProtocolEncoder.java b/src/main/java/org/traccar/StringProtocolEncoder.java
index 1945ae174..afe2381d0 100644
--- a/src/main/java/org/traccar/StringProtocolEncoder.java
+++ b/src/main/java/org/traccar/StringProtocolEncoder.java
@@ -21,6 +21,10 @@ import java.util.Map;
 
 public abstract class StringProtocolEncoder extends BaseProtocolEncoder {
 
+    public StringProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     public interface ValueFormatter {
         String formatValue(String key, Object value);
     }
diff --git a/src/main/java/org/traccar/protocol/AdmProtocol.java b/src/main/java/org/traccar/protocol/AdmProtocol.java
index 08f932ceb..9e5647cd4 100644
--- a/src/main/java/org/traccar/protocol/AdmProtocol.java
+++ b/src/main/java/org/traccar/protocol/AdmProtocol.java
@@ -35,7 +35,7 @@ public class AdmProtocol extends BaseProtocol {
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new LengthFieldBasedFrameDecoder(ByteOrder.LITTLE_ENDIAN, 1024, 2, 1, -3, 0, true));
                 pipeline.addLast(new StringEncoder());
-                pipeline.addLast(new AdmProtocolEncoder());
+                pipeline.addLast(new AdmProtocolEncoder(AdmProtocol.this));
                 pipeline.addLast(new AdmProtocolDecoder(AdmProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/AdmProtocolEncoder.java b/src/main/java/org/traccar/protocol/AdmProtocolEncoder.java
index e76bc2ddc..537235e43 100644
--- a/src/main/java/org/traccar/protocol/AdmProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/AdmProtocolEncoder.java
@@ -18,9 +18,14 @@ package org.traccar.protocol;
 
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class AdmProtocolEncoder extends StringProtocolEncoder {
 
+    public AdmProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected Object encodeCommand(Command command) {
 
diff --git a/src/main/java/org/traccar/protocol/AtrackProtocol.java b/src/main/java/org/traccar/protocol/AtrackProtocol.java
index 8e5cfe9ff..1ad420e18 100644
--- a/src/main/java/org/traccar/protocol/AtrackProtocol.java
+++ b/src/main/java/org/traccar/protocol/AtrackProtocol.java
@@ -29,14 +29,14 @@ public class AtrackProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new AtrackFrameDecoder());
-                pipeline.addLast(new AtrackProtocolEncoder());
+                pipeline.addLast(new AtrackProtocolEncoder(AtrackProtocol.this));
                 pipeline.addLast(new AtrackProtocolDecoder(AtrackProtocol.this));
             }
         });
         addServer(new TrackerServer(true, getName()) {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
-                pipeline.addLast(new AtrackProtocolEncoder());
+                pipeline.addLast(new AtrackProtocolEncoder(AtrackProtocol.this));
                 pipeline.addLast(new AtrackProtocolDecoder(AtrackProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/AtrackProtocolEncoder.java b/src/main/java/org/traccar/protocol/AtrackProtocolEncoder.java
index 1e085cb26..ec47000dd 100644
--- a/src/main/java/org/traccar/protocol/AtrackProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/AtrackProtocolEncoder.java
@@ -18,11 +18,16 @@ package org.traccar.protocol;
 import io.netty.buffer.Unpooled;
 import org.traccar.BaseProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 import java.nio.charset.StandardCharsets;
 
 public class AtrackProtocolEncoder extends BaseProtocolEncoder {
 
+    public AtrackProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected Object encodeCommand(Command command) {
 
diff --git a/src/main/java/org/traccar/protocol/BceProtocol.java b/src/main/java/org/traccar/protocol/BceProtocol.java
index 6453a05a9..ad145cdcb 100644
--- a/src/main/java/org/traccar/protocol/BceProtocol.java
+++ b/src/main/java/org/traccar/protocol/BceProtocol.java
@@ -29,7 +29,7 @@ public class BceProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new BceFrameDecoder());
-                pipeline.addLast(new BceProtocolEncoder());
+                pipeline.addLast(new BceProtocolEncoder(BceProtocol.this));
                 pipeline.addLast(new BceProtocolDecoder(BceProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/BceProtocolEncoder.java b/src/main/java/org/traccar/protocol/BceProtocolEncoder.java
index 1bbf3db12..02a2565f7 100644
--- a/src/main/java/org/traccar/protocol/BceProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/BceProtocolEncoder.java
@@ -20,9 +20,14 @@ import io.netty.buffer.Unpooled;
 import org.traccar.BaseProtocolEncoder;
 import org.traccar.helper.Checksum;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class BceProtocolEncoder extends BaseProtocolEncoder {
 
+    public BceProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected Object encodeCommand(Command command) {
 
diff --git a/src/main/java/org/traccar/protocol/CarcellProtocol.java b/src/main/java/org/traccar/protocol/CarcellProtocol.java
index 0c305efcb..f6e23742b 100644
--- a/src/main/java/org/traccar/protocol/CarcellProtocol.java
+++ b/src/main/java/org/traccar/protocol/CarcellProtocol.java
@@ -35,7 +35,7 @@ public class CarcellProtocol extends BaseProtocol {
                 pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '\r'));
                 pipeline.addLast(new StringEncoder());
                 pipeline.addLast(new StringDecoder());
-                pipeline.addLast(new CarcellProtocolEncoder());
+                pipeline.addLast(new CarcellProtocolEncoder(CarcellProtocol.this));
                 pipeline.addLast(new CarcellProtocolDecoder(CarcellProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/CarcellProtocolEncoder.java b/src/main/java/org/traccar/protocol/CarcellProtocolEncoder.java
index e8f0081a0..c6b1806d5 100644
--- a/src/main/java/org/traccar/protocol/CarcellProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/CarcellProtocolEncoder.java
@@ -17,9 +17,14 @@ package org.traccar.protocol;
 
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class CarcellProtocolEncoder extends StringProtocolEncoder {
 
+    public CarcellProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected Object encodeCommand(Command command) {
 
diff --git a/src/main/java/org/traccar/protocol/CastelProtocol.java b/src/main/java/org/traccar/protocol/CastelProtocol.java
index 9b854afc3..78899f074 100644
--- a/src/main/java/org/traccar/protocol/CastelProtocol.java
+++ b/src/main/java/org/traccar/protocol/CastelProtocol.java
@@ -32,14 +32,14 @@ public class CastelProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new LengthFieldBasedFrameDecoder(ByteOrder.LITTLE_ENDIAN, 1024, 2, 2, -4, 0, true));
-                pipeline.addLast(new CastelProtocolEncoder());
+                pipeline.addLast(new CastelProtocolEncoder(CastelProtocol.this));
                 pipeline.addLast(new CastelProtocolDecoder(CastelProtocol.this));
             }
         });
         addServer(new TrackerServer(true, getName()) {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
-                pipeline.addLast(new CastelProtocolEncoder());
+                pipeline.addLast(new CastelProtocolEncoder(CastelProtocol.this));
                 pipeline.addLast(new CastelProtocolDecoder(CastelProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/CastelProtocolEncoder.java b/src/main/java/org/traccar/protocol/CastelProtocolEncoder.java
index e1f78e7c1..1fabf8787 100644
--- a/src/main/java/org/traccar/protocol/CastelProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/CastelProtocolEncoder.java
@@ -21,11 +21,16 @@ import org.traccar.BaseProtocolEncoder;
 import org.traccar.Context;
 import org.traccar.helper.Checksum;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 import java.nio.charset.StandardCharsets;
 
 public class CastelProtocolEncoder extends BaseProtocolEncoder {
 
+    public CastelProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private ByteBuf encodeContent(long deviceId, short type, ByteBuf content) {
 
         ByteBuf buf = Unpooled.buffer(0);
diff --git a/src/main/java/org/traccar/protocol/CellocatorProtocol.java b/src/main/java/org/traccar/protocol/CellocatorProtocol.java
index a52170dc9..6e624f62f 100644
--- a/src/main/java/org/traccar/protocol/CellocatorProtocol.java
+++ b/src/main/java/org/traccar/protocol/CellocatorProtocol.java
@@ -29,14 +29,14 @@ public class CellocatorProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new CellocatorFrameDecoder());
-                pipeline.addLast(new CellocatorProtocolEncoder());
+                pipeline.addLast(new CellocatorProtocolEncoder(CellocatorProtocol.this));
                 pipeline.addLast(new CellocatorProtocolDecoder(CellocatorProtocol.this));
             }
         });
         addServer(new TrackerServer(true, getName()) {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
-                pipeline.addLast(new CellocatorProtocolEncoder());
+                pipeline.addLast(new CellocatorProtocolEncoder(CellocatorProtocol.this));
                 pipeline.addLast(new CellocatorProtocolDecoder(CellocatorProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/CellocatorProtocolEncoder.java b/src/main/java/org/traccar/protocol/CellocatorProtocolEncoder.java
index 0382dbbc7..10f79023a 100644
--- a/src/main/java/org/traccar/protocol/CellocatorProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/CellocatorProtocolEncoder.java
@@ -19,9 +19,14 @@ import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 import org.traccar.BaseProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class CellocatorProtocolEncoder extends BaseProtocolEncoder {
 
+    public CellocatorProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private ByteBuf encodeContent(long deviceId, int command, int data1, int data2) {
 
         ByteBuf buf = Unpooled.buffer(0);
diff --git a/src/main/java/org/traccar/protocol/CityeasyProtocol.java b/src/main/java/org/traccar/protocol/CityeasyProtocol.java
index f4b49c9ff..cf1c85189 100644
--- a/src/main/java/org/traccar/protocol/CityeasyProtocol.java
+++ b/src/main/java/org/traccar/protocol/CityeasyProtocol.java
@@ -33,7 +33,7 @@ public class CityeasyProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new LengthFieldBasedFrameDecoder(1024, 2, 2, -4, 0));
-                pipeline.addLast(new CityeasyProtocolEncoder());
+                pipeline.addLast(new CityeasyProtocolEncoder(CityeasyProtocol.this));
                 pipeline.addLast(new CityeasyProtocolDecoder(CityeasyProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/CityeasyProtocolEncoder.java b/src/main/java/org/traccar/protocol/CityeasyProtocolEncoder.java
index 350fdf0ab..db673c9ba 100644
--- a/src/main/java/org/traccar/protocol/CityeasyProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/CityeasyProtocolEncoder.java
@@ -22,9 +22,14 @@ import io.netty.buffer.Unpooled;
 import org.traccar.BaseProtocolEncoder;
 import org.traccar.helper.Checksum;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class CityeasyProtocolEncoder extends BaseProtocolEncoder {
 
+    public CityeasyProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private ByteBuf encodeContent(int type, ByteBuf content) {
 
         ByteBuf buf = Unpooled.buffer();
diff --git a/src/main/java/org/traccar/protocol/EelinkProtocol.java b/src/main/java/org/traccar/protocol/EelinkProtocol.java
index de4ea971b..599767074 100644
--- a/src/main/java/org/traccar/protocol/EelinkProtocol.java
+++ b/src/main/java/org/traccar/protocol/EelinkProtocol.java
@@ -34,14 +34,14 @@ public class EelinkProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new LengthFieldBasedFrameDecoder(1024, 3, 2));
-                pipeline.addLast(new EelinkProtocolEncoder(false));
+                pipeline.addLast(new EelinkProtocolEncoder(EelinkProtocol.this, false));
                 pipeline.addLast(new EelinkProtocolDecoder(EelinkProtocol.this));
             }
         });
         addServer(new TrackerServer(true, getName()) {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
-                pipeline.addLast(new EelinkProtocolEncoder(true));
+                pipeline.addLast(new EelinkProtocolEncoder(EelinkProtocol.this, true));
                 pipeline.addLast(new EelinkProtocolDecoder(EelinkProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/EelinkProtocolEncoder.java b/src/main/java/org/traccar/protocol/EelinkProtocolEncoder.java
index 8f33441fb..f7a016a35 100644
--- a/src/main/java/org/traccar/protocol/EelinkProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/EelinkProtocolEncoder.java
@@ -20,6 +20,7 @@ import io.netty.buffer.Unpooled;
 import org.traccar.BaseProtocolEncoder;
 import org.traccar.helper.DataConverter;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 import java.nio.ByteBuffer;
 import java.nio.charset.StandardCharsets;
@@ -28,7 +29,8 @@ public class EelinkProtocolEncoder extends BaseProtocolEncoder {
 
     private boolean connectionless;
 
-    public EelinkProtocolEncoder(boolean connectionless) {
+    public EelinkProtocolEncoder(Protocol protocol, boolean connectionless) {
+        super(protocol);
         this.connectionless = connectionless;
     }
 
diff --git a/src/main/java/org/traccar/protocol/EnforaProtocol.java b/src/main/java/org/traccar/protocol/EnforaProtocol.java
index f78e4b377..e462ab322 100644
--- a/src/main/java/org/traccar/protocol/EnforaProtocol.java
+++ b/src/main/java/org/traccar/protocol/EnforaProtocol.java
@@ -32,14 +32,14 @@ public class EnforaProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new LengthFieldBasedFrameDecoder(1024, 0, 2, -2, 2));
-                pipeline.addLast(new EnforaProtocolEncoder());
+                pipeline.addLast(new EnforaProtocolEncoder(EnforaProtocol.this));
                 pipeline.addLast(new EnforaProtocolDecoder(EnforaProtocol.this));
             }
         });
         addServer(new TrackerServer(true, getName()) {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
-                pipeline.addLast(new EnforaProtocolEncoder());
+                pipeline.addLast(new EnforaProtocolEncoder(EnforaProtocol.this));
                 pipeline.addLast(new EnforaProtocolDecoder(EnforaProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/EnforaProtocolEncoder.java b/src/main/java/org/traccar/protocol/EnforaProtocolEncoder.java
index a46e6367d..c8c9fbd63 100644
--- a/src/main/java/org/traccar/protocol/EnforaProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/EnforaProtocolEncoder.java
@@ -20,11 +20,16 @@ import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 import java.nio.charset.StandardCharsets;
 
 public class EnforaProtocolEncoder extends StringProtocolEncoder {
 
+    public EnforaProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private ByteBuf encodeContent(String content) {
 
         ByteBuf buf = Unpooled.buffer();
diff --git a/src/main/java/org/traccar/protocol/EsealProtocol.java b/src/main/java/org/traccar/protocol/EsealProtocol.java
index 7a27c617d..3b2bdf8d8 100644
--- a/src/main/java/org/traccar/protocol/EsealProtocol.java
+++ b/src/main/java/org/traccar/protocol/EsealProtocol.java
@@ -36,7 +36,7 @@ public class EsealProtocol extends BaseProtocol {
                 pipeline.addLast(new LineBasedFrameDecoder(1024));
                 pipeline.addLast(new StringEncoder());
                 pipeline.addLast(new StringDecoder());
-                pipeline.addLast(new EsealProtocolEncoder());
+                pipeline.addLast(new EsealProtocolEncoder(EsealProtocol.this));
                 pipeline.addLast(new EsealProtocolDecoder(EsealProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/EsealProtocolEncoder.java b/src/main/java/org/traccar/protocol/EsealProtocolEncoder.java
index b9bcc5b0a..112862e13 100644
--- a/src/main/java/org/traccar/protocol/EsealProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/EsealProtocolEncoder.java
@@ -17,9 +17,14 @@ package org.traccar.protocol;
 
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class EsealProtocolEncoder extends StringProtocolEncoder {
 
+    public EsealProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected Object encodeCommand(Command command) {
 
diff --git a/src/main/java/org/traccar/protocol/FifotrackProtocol.java b/src/main/java/org/traccar/protocol/FifotrackProtocol.java
index d1c3cf695..4a0a12ed3 100644
--- a/src/main/java/org/traccar/protocol/FifotrackProtocol.java
+++ b/src/main/java/org/traccar/protocol/FifotrackProtocol.java
@@ -32,7 +32,7 @@ public class FifotrackProtocol extends BaseProtocol {
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new FifotrackFrameDecoder());
                 pipeline.addLast(new StringEncoder());
-                pipeline.addLast(new FifotrackProtocolEncoder());
+                pipeline.addLast(new FifotrackProtocolEncoder(FifotrackProtocol.this));
                 pipeline.addLast(new FifotrackProtocolDecoder(FifotrackProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/FifotrackProtocolEncoder.java b/src/main/java/org/traccar/protocol/FifotrackProtocolEncoder.java
index ff0a2e56e..a4e69b47b 100644
--- a/src/main/java/org/traccar/protocol/FifotrackProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/FifotrackProtocolEncoder.java
@@ -18,9 +18,14 @@ package org.traccar.protocol;
 import org.traccar.StringProtocolEncoder;
 import org.traccar.helper.Checksum;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class FifotrackProtocolEncoder extends StringProtocolEncoder {
 
+    public FifotrackProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private Object formatCommand(Command command, String content) {
         String uniqueId = getUniqueId(command.getDeviceId());
         int length = 1 + uniqueId.length() + 3 + content.length();
diff --git a/src/main/java/org/traccar/protocol/GalileoProtocol.java b/src/main/java/org/traccar/protocol/GalileoProtocol.java
index 9b7fe1a4b..a737d7f92 100644
--- a/src/main/java/org/traccar/protocol/GalileoProtocol.java
+++ b/src/main/java/org/traccar/protocol/GalileoProtocol.java
@@ -30,7 +30,7 @@ public class GalileoProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new GalileoFrameDecoder());
-                pipeline.addLast(new GalileoProtocolEncoder());
+                pipeline.addLast(new GalileoProtocolEncoder(GalileoProtocol.this));
                 pipeline.addLast(new GalileoProtocolDecoder(GalileoProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/GalileoProtocolEncoder.java b/src/main/java/org/traccar/protocol/GalileoProtocolEncoder.java
index 3b2145e74..3d4c1992b 100644
--- a/src/main/java/org/traccar/protocol/GalileoProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/GalileoProtocolEncoder.java
@@ -20,11 +20,16 @@ import io.netty.buffer.Unpooled;
 import org.traccar.BaseProtocolEncoder;
 import org.traccar.helper.Checksum;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 import java.nio.charset.StandardCharsets;
 
 public class GalileoProtocolEncoder extends BaseProtocolEncoder {
 
+    public GalileoProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private ByteBuf encodeText(String uniqueId, String text) {
 
         ByteBuf buf = Unpooled.buffer(256);
diff --git a/src/main/java/org/traccar/protocol/Gl200Protocol.java b/src/main/java/org/traccar/protocol/Gl200Protocol.java
index c5343dae0..d0c21eff3 100644
--- a/src/main/java/org/traccar/protocol/Gl200Protocol.java
+++ b/src/main/java/org/traccar/protocol/Gl200Protocol.java
@@ -36,7 +36,7 @@ public class Gl200Protocol extends BaseProtocol {
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new Gl200FrameDecoder());
                 pipeline.addLast(new StringEncoder());
-                pipeline.addLast(new Gl200ProtocolEncoder());
+                pipeline.addLast(new Gl200ProtocolEncoder(Gl200Protocol.this));
                 pipeline.addLast(new Gl200ProtocolDecoder(Gl200Protocol.this));
             }
         });
@@ -44,7 +44,7 @@ public class Gl200Protocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new StringEncoder());
-                pipeline.addLast(new Gl200ProtocolEncoder());
+                pipeline.addLast(new Gl200ProtocolEncoder(Gl200Protocol.this));
                 pipeline.addLast(new Gl200ProtocolDecoder(Gl200Protocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/Gl200ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Gl200ProtocolEncoder.java
index 285106c67..3d026d6e9 100644
--- a/src/main/java/org/traccar/protocol/Gl200ProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/Gl200ProtocolEncoder.java
@@ -17,9 +17,14 @@ package org.traccar.protocol;
 
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class Gl200ProtocolEncoder extends StringProtocolEncoder {
 
+    public Gl200ProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected Object encodeCommand(Command command) {
 
diff --git a/src/main/java/org/traccar/protocol/Gps103Protocol.java b/src/main/java/org/traccar/protocol/Gps103Protocol.java
index 6272a3fd1..b26ec6063 100644
--- a/src/main/java/org/traccar/protocol/Gps103Protocol.java
+++ b/src/main/java/org/traccar/protocol/Gps103Protocol.java
@@ -42,7 +42,7 @@ public class Gps103Protocol extends BaseProtocol {
                 pipeline.addLast(new CharacterDelimiterFrameDecoder(2048, false, "\r\n", "\n", ";", "*"));
                 pipeline.addLast(new StringEncoder());
                 pipeline.addLast(new StringDecoder());
-                pipeline.addLast(new Gps103ProtocolEncoder());
+                pipeline.addLast(new Gps103ProtocolEncoder(Gps103Protocol.this));
                 pipeline.addLast(new Gps103ProtocolDecoder(Gps103Protocol.this));
             }
         });
@@ -51,7 +51,7 @@ public class Gps103Protocol extends BaseProtocol {
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new StringEncoder());
                 pipeline.addLast(new StringDecoder());
-                pipeline.addLast(new Gps103ProtocolEncoder());
+                pipeline.addLast(new Gps103ProtocolEncoder(Gps103Protocol.this));
                 pipeline.addLast(new Gps103ProtocolDecoder(Gps103Protocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/Gps103ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Gps103ProtocolEncoder.java
index 47ef2f333..24b8ba5d4 100644
--- a/src/main/java/org/traccar/protocol/Gps103ProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/Gps103ProtocolEncoder.java
@@ -17,9 +17,14 @@ package org.traccar.protocol;
 
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class Gps103ProtocolEncoder extends StringProtocolEncoder implements StringProtocolEncoder.ValueFormatter {
 
+    public Gps103ProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     public String formatValue(String key, Object value) {
 
diff --git a/src/main/java/org/traccar/protocol/GranitProtocol.java b/src/main/java/org/traccar/protocol/GranitProtocol.java
index 6785f2a2e..96bf5dc56 100644
--- a/src/main/java/org/traccar/protocol/GranitProtocol.java
+++ b/src/main/java/org/traccar/protocol/GranitProtocol.java
@@ -28,7 +28,7 @@ public class GranitProtocol extends BaseProtocol {
                 Command.TYPE_IDENTIFICATION,
                 Command.TYPE_REBOOT_DEVICE,
                 Command.TYPE_POSITION_SINGLE);
-        setTextCommandEncoder(new GranitProtocolSmsEncoder());
+        setTextCommandEncoder(new GranitProtocolSmsEncoder(GranitProtocol.this));
         setSupportedTextCommands(
                 Command.TYPE_REBOOT_DEVICE,
                 Command.TYPE_POSITION_PERIODIC);
@@ -36,7 +36,7 @@ public class GranitProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new GranitFrameDecoder());
-                pipeline.addLast(new GranitProtocolEncoder());
+                pipeline.addLast(new GranitProtocolEncoder(GranitProtocol.this));
                 pipeline.addLast(new GranitProtocolDecoder(GranitProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/GranitProtocolEncoder.java b/src/main/java/org/traccar/protocol/GranitProtocolEncoder.java
index 6345ff971..44c2d0c11 100644
--- a/src/main/java/org/traccar/protocol/GranitProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/GranitProtocolEncoder.java
@@ -21,9 +21,14 @@ import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 import org.traccar.BaseProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class GranitProtocolEncoder extends BaseProtocolEncoder {
 
+    public GranitProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private ByteBuf encodeCommand(String commandString) {
         ByteBuf buffer = Unpooled.buffer();
         buffer.writeBytes(commandString.getBytes(StandardCharsets.US_ASCII));
diff --git a/src/main/java/org/traccar/protocol/GranitProtocolSmsEncoder.java b/src/main/java/org/traccar/protocol/GranitProtocolSmsEncoder.java
index 7d5518c17..456740ced 100644
--- a/src/main/java/org/traccar/protocol/GranitProtocolSmsEncoder.java
+++ b/src/main/java/org/traccar/protocol/GranitProtocolSmsEncoder.java
@@ -18,9 +18,14 @@ package org.traccar.protocol;
 
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class GranitProtocolSmsEncoder extends StringProtocolEncoder {
 
+    public GranitProtocolSmsEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected String encodeCommand(Command command) {
         switch (command.getType()) {
diff --git a/src/main/java/org/traccar/protocol/Gt06Protocol.java b/src/main/java/org/traccar/protocol/Gt06Protocol.java
index 6e5435cd4..01ebae6e2 100644
--- a/src/main/java/org/traccar/protocol/Gt06Protocol.java
+++ b/src/main/java/org/traccar/protocol/Gt06Protocol.java
@@ -31,7 +31,7 @@ public class Gt06Protocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new Gt06FrameDecoder());
-                pipeline.addLast(new Gt06ProtocolEncoder());
+                pipeline.addLast(new Gt06ProtocolEncoder(Gt06Protocol.this));
                 pipeline.addLast(new Gt06ProtocolDecoder(Gt06Protocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/Gt06ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Gt06ProtocolEncoder.java
index 05560229f..db98ee940 100644
--- a/src/main/java/org/traccar/protocol/Gt06ProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/Gt06ProtocolEncoder.java
@@ -21,11 +21,16 @@ import org.traccar.BaseProtocolEncoder;
 import org.traccar.Context;
 import org.traccar.helper.Checksum;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 import java.nio.charset.StandardCharsets;
 
 public class Gt06ProtocolEncoder extends BaseProtocolEncoder {
 
+    public Gt06ProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private ByteBuf encodeContent(long deviceId, String content) {
 
         boolean language = Context.getIdentityManager().lookupAttributeBoolean(deviceId, "gt06.language", false, true);
diff --git a/src/main/java/org/traccar/protocol/H02Protocol.java b/src/main/java/org/traccar/protocol/H02Protocol.java
index 251beac5e..8df17a46c 100644
--- a/src/main/java/org/traccar/protocol/H02Protocol.java
+++ b/src/main/java/org/traccar/protocol/H02Protocol.java
@@ -38,7 +38,7 @@ public class H02Protocol extends BaseProtocol {
                 int messageLength = Context.getConfig().getInteger(getName() + ".messageLength");
                 pipeline.addLast(new H02FrameDecoder(messageLength));
                 pipeline.addLast(new StringEncoder());
-                pipeline.addLast(new H02ProtocolEncoder());
+                pipeline.addLast(new H02ProtocolEncoder(H02Protocol.this));
                 pipeline.addLast(new H02ProtocolDecoder(H02Protocol.this));
             }
         });
@@ -46,7 +46,7 @@ public class H02Protocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new StringEncoder());
-                pipeline.addLast(new H02ProtocolEncoder());
+                pipeline.addLast(new H02ProtocolEncoder(H02Protocol.this));
                 pipeline.addLast(new H02ProtocolDecoder(H02Protocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/H02ProtocolEncoder.java b/src/main/java/org/traccar/protocol/H02ProtocolEncoder.java
index 614a07dd1..18e3b888a 100644
--- a/src/main/java/org/traccar/protocol/H02ProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/H02ProtocolEncoder.java
@@ -19,6 +19,7 @@ package org.traccar.protocol;
 import org.traccar.Context;
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 import java.util.Date;
 
@@ -26,6 +27,10 @@ public class H02ProtocolEncoder extends StringProtocolEncoder {
 
     private static final String MARKER = "HQ";
 
+    public H02ProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private Object formatCommand(Date time, String uniqueId, String type, String... params) {
 
         StringBuilder result = new StringBuilder(
diff --git a/src/main/java/org/traccar/protocol/HuabaoProtocol.java b/src/main/java/org/traccar/protocol/HuabaoProtocol.java
index 44c9f7ac7..87b717e25 100644
--- a/src/main/java/org/traccar/protocol/HuabaoProtocol.java
+++ b/src/main/java/org/traccar/protocol/HuabaoProtocol.java
@@ -30,7 +30,7 @@ public class HuabaoProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new HuabaoFrameDecoder());
-                pipeline.addLast(new HuabaoProtocolEncoder());
+                pipeline.addLast(new HuabaoProtocolEncoder(HuabaoProtocol.this));
                 pipeline.addLast(new HuabaoProtocolDecoder(HuabaoProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/HuabaoProtocolEncoder.java b/src/main/java/org/traccar/protocol/HuabaoProtocolEncoder.java
index 7759790c4..2038c8d48 100644
--- a/src/main/java/org/traccar/protocol/HuabaoProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/HuabaoProtocolEncoder.java
@@ -21,12 +21,17 @@ import org.traccar.BaseProtocolEncoder;
 import org.traccar.Context;
 import org.traccar.helper.DataConverter;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 import java.text.SimpleDateFormat;
 import java.util.Date;
 
 public class HuabaoProtocolEncoder extends BaseProtocolEncoder {
 
+    public HuabaoProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected Object encodeCommand(Command command) {
 
diff --git a/src/main/java/org/traccar/protocol/ItsProtocolEncoder.java b/src/main/java/org/traccar/protocol/ItsProtocolEncoder.java
index ebbbd87cd..f82b8e3ac 100644
--- a/src/main/java/org/traccar/protocol/ItsProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/ItsProtocolEncoder.java
@@ -17,9 +17,14 @@ package org.traccar.protocol;
 
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class ItsProtocolEncoder extends StringProtocolEncoder {
 
+    public ItsProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected Object encodeCommand(Command command) {
 
diff --git a/src/main/java/org/traccar/protocol/Jt600Protocol.java b/src/main/java/org/traccar/protocol/Jt600Protocol.java
index 97c5fa6ce..44800c23f 100644
--- a/src/main/java/org/traccar/protocol/Jt600Protocol.java
+++ b/src/main/java/org/traccar/protocol/Jt600Protocol.java
@@ -34,7 +34,7 @@ public class Jt600Protocol extends BaseProtocol {
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new Jt600FrameDecoder());
                 pipeline.addLast(new StringEncoder());
-                pipeline.addLast(new Jt600ProtocolEncoder());
+                pipeline.addLast(new Jt600ProtocolEncoder(Jt600Protocol.this));
                 pipeline.addLast(new Jt600ProtocolDecoder(Jt600Protocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/Jt600ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Jt600ProtocolEncoder.java
index fe5c63c32..eac1faa90 100644
--- a/src/main/java/org/traccar/protocol/Jt600ProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/Jt600ProtocolEncoder.java
@@ -19,9 +19,14 @@ import java.util.TimeZone;
 
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class Jt600ProtocolEncoder extends StringProtocolEncoder {
 
+    public Jt600ProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected Object encodeCommand(Command command) {
 
diff --git a/src/main/java/org/traccar/protocol/KhdProtocol.java b/src/main/java/org/traccar/protocol/KhdProtocol.java
index cec7158ed..bbdbc57b4 100644
--- a/src/main/java/org/traccar/protocol/KhdProtocol.java
+++ b/src/main/java/org/traccar/protocol/KhdProtocol.java
@@ -31,7 +31,7 @@ public class KhdProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new LengthFieldBasedFrameDecoder(512, 3, 2));
-                pipeline.addLast(new KhdProtocolEncoder());
+                pipeline.addLast(new KhdProtocolEncoder(KhdProtocol.this));
                 pipeline.addLast(new KhdProtocolDecoder(KhdProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/KhdProtocolEncoder.java b/src/main/java/org/traccar/protocol/KhdProtocolEncoder.java
index c66129283..13e832a85 100644
--- a/src/main/java/org/traccar/protocol/KhdProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/KhdProtocolEncoder.java
@@ -20,12 +20,17 @@ import io.netty.buffer.Unpooled;
 import org.traccar.BaseProtocolEncoder;
 import org.traccar.helper.Checksum;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class KhdProtocolEncoder extends BaseProtocolEncoder {
 
     public static final int MSG_CUT_OIL = 0x39;
     public static final int MSG_RESUME_OIL = 0x38;
 
+    public KhdProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private ByteBuf encodeCommand(int command, String uniqueId) {
 
         ByteBuf buf = Unpooled.buffer();
diff --git a/src/main/java/org/traccar/protocol/LaipacProtocol.java b/src/main/java/org/traccar/protocol/LaipacProtocol.java
index b325755c8..1d561dbd2 100644
--- a/src/main/java/org/traccar/protocol/LaipacProtocol.java
+++ b/src/main/java/org/traccar/protocol/LaipacProtocol.java
@@ -38,7 +38,7 @@ public class LaipacProtocol extends BaseProtocol {
                 pipeline.addLast(new LineBasedFrameDecoder(1024));
                 pipeline.addLast(new StringEncoder());
                 pipeline.addLast(new StringDecoder());
-                pipeline.addLast(new LaipacProtocolEncoder());
+                pipeline.addLast(new LaipacProtocolEncoder(LaipacProtocol.this));
                 pipeline.addLast(new LaipacProtocolDecoder(LaipacProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/LaipacProtocolEncoder.java b/src/main/java/org/traccar/protocol/LaipacProtocolEncoder.java
index dec76b83c..343ac9431 100644
--- a/src/main/java/org/traccar/protocol/LaipacProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/LaipacProtocolEncoder.java
@@ -18,9 +18,14 @@ package org.traccar.protocol;
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
 import org.traccar.helper.Checksum;
+import org.traccar.Protocol;
 
 public class LaipacProtocolEncoder extends StringProtocolEncoder {
 
+    public LaipacProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected String formatCommand(Command command, String format, String... keys) {
         String sentence = super.formatCommand(command, "$" + format, keys);
diff --git a/src/main/java/org/traccar/protocol/MeiligaoProtocol.java b/src/main/java/org/traccar/protocol/MeiligaoProtocol.java
index c307c7318..5c5a4f4d5 100644
--- a/src/main/java/org/traccar/protocol/MeiligaoProtocol.java
+++ b/src/main/java/org/traccar/protocol/MeiligaoProtocol.java
@@ -36,14 +36,14 @@ public class MeiligaoProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new MeiligaoFrameDecoder());
-                pipeline.addLast(new MeiligaoProtocolEncoder());
+                pipeline.addLast(new MeiligaoProtocolEncoder(MeiligaoProtocol.this));
                 pipeline.addLast(new MeiligaoProtocolDecoder(MeiligaoProtocol.this));
             }
         });
         addServer(new TrackerServer(true, getName()) {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
-                pipeline.addLast(new MeiligaoProtocolEncoder());
+                pipeline.addLast(new MeiligaoProtocolEncoder(MeiligaoProtocol.this));
                 pipeline.addLast(new MeiligaoProtocolDecoder(MeiligaoProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/MeiligaoProtocolEncoder.java b/src/main/java/org/traccar/protocol/MeiligaoProtocolEncoder.java
index 57cbbe0fc..9a26bd9f1 100644
--- a/src/main/java/org/traccar/protocol/MeiligaoProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/MeiligaoProtocolEncoder.java
@@ -21,12 +21,17 @@ import org.traccar.BaseProtocolEncoder;
 import org.traccar.helper.Checksum;
 import org.traccar.helper.DataConverter;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 import java.nio.charset.StandardCharsets;
 import java.util.TimeZone;
 
 public class MeiligaoProtocolEncoder extends BaseProtocolEncoder {
 
+    public MeiligaoProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private ByteBuf encodeContent(long deviceId, int type, ByteBuf content) {
 
         ByteBuf buf = Unpooled.buffer();
diff --git a/src/main/java/org/traccar/protocol/MeitrackProtocol.java b/src/main/java/org/traccar/protocol/MeitrackProtocol.java
index c887cd3a0..fea86cf15 100644
--- a/src/main/java/org/traccar/protocol/MeitrackProtocol.java
+++ b/src/main/java/org/traccar/protocol/MeitrackProtocol.java
@@ -37,7 +37,7 @@ public class MeitrackProtocol extends BaseProtocol {
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new MeitrackFrameDecoder());
                 pipeline.addLast(new StringEncoder());
-                pipeline.addLast(new MeitrackProtocolEncoder());
+                pipeline.addLast(new MeitrackProtocolEncoder(MeitrackProtocol.this));
                 pipeline.addLast(new MeitrackProtocolDecoder(MeitrackProtocol.this));
             }
         });
@@ -45,7 +45,7 @@ public class MeitrackProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new StringEncoder());
-                pipeline.addLast(new MeitrackProtocolEncoder());
+                pipeline.addLast(new MeitrackProtocolEncoder(MeitrackProtocol.this));
                 pipeline.addLast(new MeitrackProtocolDecoder(MeitrackProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/MeitrackProtocolEncoder.java b/src/main/java/org/traccar/protocol/MeitrackProtocolEncoder.java
index abb6ec9d4..6c29a9720 100644
--- a/src/main/java/org/traccar/protocol/MeitrackProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/MeitrackProtocolEncoder.java
@@ -19,11 +19,16 @@ import org.traccar.Context;
 import org.traccar.StringProtocolEncoder;
 import org.traccar.helper.Checksum;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 import java.util.Map;
 
 public class MeitrackProtocolEncoder extends StringProtocolEncoder {
 
+    public MeitrackProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private Object formatCommand(Command command, char dataId, String content) {
         String uniqueId = getUniqueId(command.getDeviceId());
         int length = 1 + uniqueId.length() + 1 + content.length() + 5;
diff --git a/src/main/java/org/traccar/protocol/MiniFinderProtocol.java b/src/main/java/org/traccar/protocol/MiniFinderProtocol.java
index d4a154053..60a203710 100644
--- a/src/main/java/org/traccar/protocol/MiniFinderProtocol.java
+++ b/src/main/java/org/traccar/protocol/MiniFinderProtocol.java
@@ -44,7 +44,7 @@ public class MiniFinderProtocol extends BaseProtocol {
                 pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, ';'));
                 pipeline.addLast(new StringEncoder());
                 pipeline.addLast(new StringDecoder());
-                pipeline.addLast(new MiniFinderProtocolEncoder());
+                pipeline.addLast(new MiniFinderProtocolEncoder(MiniFinderProtocol.this));
                 pipeline.addLast(new MiniFinderProtocolDecoder(MiniFinderProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/MiniFinderProtocolEncoder.java b/src/main/java/org/traccar/protocol/MiniFinderProtocolEncoder.java
index 7a3d5b226..69dfbe13c 100644
--- a/src/main/java/org/traccar/protocol/MiniFinderProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/MiniFinderProtocolEncoder.java
@@ -19,9 +19,14 @@ import java.util.TimeZone;
 
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class MiniFinderProtocolEncoder extends StringProtocolEncoder implements StringProtocolEncoder.ValueFormatter {
 
+    public MiniFinderProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     public String formatValue(String key, Object value) {
         switch (key) {
diff --git a/src/main/java/org/traccar/protocol/NoranProtocol.java b/src/main/java/org/traccar/protocol/NoranProtocol.java
index 9f3078d6d..2fe79adec 100644
--- a/src/main/java/org/traccar/protocol/NoranProtocol.java
+++ b/src/main/java/org/traccar/protocol/NoranProtocol.java
@@ -32,7 +32,7 @@ public class NoranProtocol extends BaseProtocol {
         addServer(new TrackerServer(true, getName()) {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
-                pipeline.addLast(new NoranProtocolEncoder());
+                pipeline.addLast(new NoranProtocolEncoder(NoranProtocol.this));
                 pipeline.addLast(new NoranProtocolDecoder(NoranProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/NoranProtocolEncoder.java b/src/main/java/org/traccar/protocol/NoranProtocolEncoder.java
index 92826c8b2..13d977e4c 100644
--- a/src/main/java/org/traccar/protocol/NoranProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/NoranProtocolEncoder.java
@@ -19,11 +19,16 @@ import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 import org.traccar.BaseProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 import java.nio.charset.StandardCharsets;
 
 public class NoranProtocolEncoder extends BaseProtocolEncoder {
 
+    public NoranProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private ByteBuf encodeContent(String content) {
 
         ByteBuf buf = Unpooled.buffer(12 + 56);
diff --git a/src/main/java/org/traccar/protocol/PretraceProtocol.java b/src/main/java/org/traccar/protocol/PretraceProtocol.java
index f753cbdb4..96f68f7d6 100644
--- a/src/main/java/org/traccar/protocol/PretraceProtocol.java
+++ b/src/main/java/org/traccar/protocol/PretraceProtocol.java
@@ -35,7 +35,7 @@ public class PretraceProtocol extends BaseProtocol {
                 pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, ')'));
                 pipeline.addLast(new StringEncoder());
                 pipeline.addLast(new StringDecoder());
-                pipeline.addLast(new PretraceProtocolEncoder());
+                pipeline.addLast(new PretraceProtocolEncoder(PretraceProtocol.this));
                 pipeline.addLast(new PretraceProtocolDecoder(PretraceProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/PretraceProtocolEncoder.java b/src/main/java/org/traccar/protocol/PretraceProtocolEncoder.java
index 9cf951e3b..91472bc0a 100644
--- a/src/main/java/org/traccar/protocol/PretraceProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/PretraceProtocolEncoder.java
@@ -19,9 +19,14 @@ import org.traccar.BaseProtocolEncoder;
 import org.traccar.Context;
 import org.traccar.helper.Checksum;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class PretraceProtocolEncoder extends BaseProtocolEncoder {
 
+    public PretraceProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private String formatCommand(String uniqueId, String data) {
         String content = uniqueId + data;
         return String.format("(%s^%02X)", content, Checksum.xor(content));
diff --git a/src/main/java/org/traccar/protocol/Pt502Protocol.java b/src/main/java/org/traccar/protocol/Pt502Protocol.java
index 5afb9451d..0d4d2185a 100644
--- a/src/main/java/org/traccar/protocol/Pt502Protocol.java
+++ b/src/main/java/org/traccar/protocol/Pt502Protocol.java
@@ -35,7 +35,7 @@ public class Pt502Protocol extends BaseProtocol {
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new Pt502FrameDecoder());
                 pipeline.addLast(new StringEncoder());
-                pipeline.addLast(new Pt502ProtocolEncoder());
+                pipeline.addLast(new Pt502ProtocolEncoder(Pt502Protocol.this));
                 pipeline.addLast(new Pt502ProtocolDecoder(Pt502Protocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/Pt502ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Pt502ProtocolEncoder.java
index ed18208cc..2e7baecd4 100644
--- a/src/main/java/org/traccar/protocol/Pt502ProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/Pt502ProtocolEncoder.java
@@ -19,9 +19,14 @@ import java.util.TimeZone;
 
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class Pt502ProtocolEncoder extends StringProtocolEncoder implements StringProtocolEncoder.ValueFormatter {
 
+    public Pt502ProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     public String formatValue(String key, Object value) {
         if (key.equals(Command.KEY_TIMEZONE)) {
diff --git a/src/main/java/org/traccar/protocol/RuptelaProtocol.java b/src/main/java/org/traccar/protocol/RuptelaProtocol.java
index a574293cd..55ffc372a 100644
--- a/src/main/java/org/traccar/protocol/RuptelaProtocol.java
+++ b/src/main/java/org/traccar/protocol/RuptelaProtocol.java
@@ -37,7 +37,7 @@ public class RuptelaProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new LengthFieldBasedFrameDecoder(1024, 0, 2, 2, 0));
-                pipeline.addLast(new RuptelaProtocolEncoder());
+                pipeline.addLast(new RuptelaProtocolEncoder(RuptelaProtocol.this));
                 pipeline.addLast(new RuptelaProtocolDecoder(RuptelaProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/RuptelaProtocolEncoder.java b/src/main/java/org/traccar/protocol/RuptelaProtocolEncoder.java
index 96d0da5a7..51967403d 100644
--- a/src/main/java/org/traccar/protocol/RuptelaProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/RuptelaProtocolEncoder.java
@@ -20,11 +20,16 @@ import io.netty.buffer.Unpooled;
 import org.traccar.BaseProtocolEncoder;
 import org.traccar.helper.Checksum;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 import java.nio.charset.StandardCharsets;
 
 public class RuptelaProtocolEncoder extends BaseProtocolEncoder {
 
+    public RuptelaProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private ByteBuf encodeContent(int type, ByteBuf content) {
 
         ByteBuf buf = Unpooled.buffer();
diff --git a/src/main/java/org/traccar/protocol/SuntechProtocol.java b/src/main/java/org/traccar/protocol/SuntechProtocol.java
index 48d6e81c1..7e2c20e6f 100644
--- a/src/main/java/org/traccar/protocol/SuntechProtocol.java
+++ b/src/main/java/org/traccar/protocol/SuntechProtocol.java
@@ -39,7 +39,7 @@ public class SuntechProtocol extends BaseProtocol {
                 pipeline.addLast(new SuntechFrameDecoder());
                 pipeline.addLast(new StringEncoder());
                 pipeline.addLast(new StringDecoder());
-                pipeline.addLast(new SuntechProtocolEncoder());
+                pipeline.addLast(new SuntechProtocolEncoder(SuntechProtocol.this));
                 pipeline.addLast(new SuntechProtocolDecoder(SuntechProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/SuntechProtocolEncoder.java b/src/main/java/org/traccar/protocol/SuntechProtocolEncoder.java
index 90fa4aa39..e2f2cff0a 100644
--- a/src/main/java/org/traccar/protocol/SuntechProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/SuntechProtocolEncoder.java
@@ -17,9 +17,14 @@ package org.traccar.protocol;
 
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class SuntechProtocolEncoder extends StringProtocolEncoder {
 
+    public SuntechProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected Object encodeCommand(Command command) {
 
diff --git a/src/main/java/org/traccar/protocol/SviasProtocol.java b/src/main/java/org/traccar/protocol/SviasProtocol.java
index f01f28389..44b817cff 100644
--- a/src/main/java/org/traccar/protocol/SviasProtocol.java
+++ b/src/main/java/org/traccar/protocol/SviasProtocol.java
@@ -42,7 +42,7 @@ public class SviasProtocol extends BaseProtocol {
                 pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, "]"));
                 pipeline.addLast(new StringEncoder());
                 pipeline.addLast(new StringDecoder());
-                pipeline.addLast(new SviasProtocolEncoder());
+                pipeline.addLast(new SviasProtocolEncoder(SviasProtocol.this));
                 pipeline.addLast(new SviasProtocolDecoder(SviasProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/SviasProtocolEncoder.java b/src/main/java/org/traccar/protocol/SviasProtocolEncoder.java
index 8bfbef119..a52d6041e 100644
--- a/src/main/java/org/traccar/protocol/SviasProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/SviasProtocolEncoder.java
@@ -18,9 +18,14 @@ package org.traccar.protocol;
 
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class SviasProtocolEncoder extends StringProtocolEncoder {
 
+    public SviasProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected Object encodeCommand(Command command) {
         switch (command.getType()) {
diff --git a/src/main/java/org/traccar/protocol/T800xProtocol.java b/src/main/java/org/traccar/protocol/T800xProtocol.java
index 85749d0cf..3b9a80668 100644
--- a/src/main/java/org/traccar/protocol/T800xProtocol.java
+++ b/src/main/java/org/traccar/protocol/T800xProtocol.java
@@ -30,7 +30,7 @@ public class T800xProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new LengthFieldBasedFrameDecoder(1024, 3, 2, -5, 0));
-                pipeline.addLast(new T800xProtocolEncoder());
+                pipeline.addLast(new T800xProtocolEncoder(T800xProtocol.this));
                 pipeline.addLast(new T800xProtocolDecoder(T800xProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/T800xProtocolEncoder.java b/src/main/java/org/traccar/protocol/T800xProtocolEncoder.java
index 34f30b147..3249eb5d3 100644
--- a/src/main/java/org/traccar/protocol/T800xProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/T800xProtocolEncoder.java
@@ -20,6 +20,7 @@ import io.netty.buffer.Unpooled;
 import org.traccar.BaseProtocolEncoder;
 import org.traccar.helper.DataConverter;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 import java.nio.charset.StandardCharsets;
 
@@ -29,6 +30,10 @@ public class T800xProtocolEncoder extends BaseProtocolEncoder {
     public static final int MODE_BROADCAST = 0x02;
     public static final int MODE_FORWARD = 0x03;
 
+    public T800xProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private ByteBuf encodeContent(Command command, String content) {
 
         ByteBuf buf = Unpooled.buffer();
diff --git a/src/main/java/org/traccar/protocol/TeltonikaProtocol.java b/src/main/java/org/traccar/protocol/TeltonikaProtocol.java
index eef9662d7..1ce700fca 100644
--- a/src/main/java/org/traccar/protocol/TeltonikaProtocol.java
+++ b/src/main/java/org/traccar/protocol/TeltonikaProtocol.java
@@ -29,14 +29,14 @@ public class TeltonikaProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new TeltonikaFrameDecoder());
-                pipeline.addLast(new TeltonikaProtocolEncoder());
+                pipeline.addLast(new TeltonikaProtocolEncoder(TeltonikaProtocol.this));
                 pipeline.addLast(new TeltonikaProtocolDecoder(TeltonikaProtocol.this, false));
             }
         });
         addServer(new TrackerServer(true, getName()) {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
-                pipeline.addLast(new TeltonikaProtocolEncoder());
+                pipeline.addLast(new TeltonikaProtocolEncoder(TeltonikaProtocol.this));
                 pipeline.addLast(new TeltonikaProtocolDecoder(TeltonikaProtocol.this, true));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/TeltonikaProtocolEncoder.java b/src/main/java/org/traccar/protocol/TeltonikaProtocolEncoder.java
index 5380cf3a0..8a614618a 100644
--- a/src/main/java/org/traccar/protocol/TeltonikaProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/TeltonikaProtocolEncoder.java
@@ -19,6 +19,7 @@ import org.traccar.BaseProtocolEncoder;
 import org.traccar.helper.Checksum;
 import org.traccar.helper.DataConverter;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
@@ -27,6 +28,10 @@ import java.nio.charset.StandardCharsets;
 
 public class TeltonikaProtocolEncoder extends BaseProtocolEncoder {
 
+    public TeltonikaProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private ByteBuf encodeContent(byte[] content) {
 
         ByteBuf buf = Unpooled.buffer();
diff --git a/src/main/java/org/traccar/protocol/Tk103Protocol.java b/src/main/java/org/traccar/protocol/Tk103Protocol.java
index fa83133e2..24939c35e 100644
--- a/src/main/java/org/traccar/protocol/Tk103Protocol.java
+++ b/src/main/java/org/traccar/protocol/Tk103Protocol.java
@@ -51,7 +51,7 @@ public class Tk103Protocol extends BaseProtocol {
                 pipeline.addLast(new Tk103FrameDecoder());
                 pipeline.addLast(new StringDecoder());
                 pipeline.addLast(new StringEncoder());
-                pipeline.addLast(new Tk103ProtocolEncoder());
+                pipeline.addLast(new Tk103ProtocolEncoder(Tk103Protocol.this));
                 pipeline.addLast(new Tk103ProtocolDecoder(Tk103Protocol.this));
             }
         });
@@ -60,7 +60,7 @@ public class Tk103Protocol extends BaseProtocol {
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new StringDecoder());
                 pipeline.addLast(new StringEncoder());
-                pipeline.addLast(new Tk103ProtocolEncoder());
+                pipeline.addLast(new Tk103ProtocolEncoder(Tk103Protocol.this));
                 pipeline.addLast(new Tk103ProtocolDecoder(Tk103Protocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/Tk103ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Tk103ProtocolEncoder.java
index 98edc8cb5..24d0558c8 100644
--- a/src/main/java/org/traccar/protocol/Tk103ProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/Tk103ProtocolEncoder.java
@@ -19,16 +19,19 @@ package org.traccar.protocol;
 import org.traccar.Context;
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class Tk103ProtocolEncoder extends StringProtocolEncoder {
 
     private final boolean forceAlternative;
 
-    public Tk103ProtocolEncoder() {
+    public Tk103ProtocolEncoder(Protocol protocol) {
+        super(protocol);
         this.forceAlternative = false;
     }
 
-    public Tk103ProtocolEncoder(boolean forceAlternative) {
+    public Tk103ProtocolEncoder(Protocol protocol, boolean forceAlternative) {
+        super(protocol);
         this.forceAlternative = forceAlternative;
     }
 
diff --git a/src/main/java/org/traccar/protocol/TotemProtocol.java b/src/main/java/org/traccar/protocol/TotemProtocol.java
index 66e1ec4f1..3f63a64a7 100644
--- a/src/main/java/org/traccar/protocol/TotemProtocol.java
+++ b/src/main/java/org/traccar/protocol/TotemProtocol.java
@@ -35,7 +35,7 @@ public class TotemProtocol extends BaseProtocol {
                 pipeline.addLast(new TotemFrameDecoder());
                 pipeline.addLast(new StringEncoder());
                 pipeline.addLast(new StringDecoder());
-                pipeline.addLast(new TotemProtocolEncoder());
+                pipeline.addLast(new TotemProtocolEncoder(TotemProtocol.this));
                 pipeline.addLast(new TotemProtocolDecoder(TotemProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/TotemProtocolEncoder.java b/src/main/java/org/traccar/protocol/TotemProtocolEncoder.java
index b5049859d..147c17ce6 100644
--- a/src/main/java/org/traccar/protocol/TotemProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/TotemProtocolEncoder.java
@@ -18,9 +18,14 @@ package org.traccar.protocol;
 
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class TotemProtocolEncoder extends StringProtocolEncoder {
 
+    public TotemProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected Object encodeCommand(Command command) {
 
diff --git a/src/main/java/org/traccar/protocol/WatchProtocol.java b/src/main/java/org/traccar/protocol/WatchProtocol.java
index fe285e70d..7a1ea6c84 100644
--- a/src/main/java/org/traccar/protocol/WatchProtocol.java
+++ b/src/main/java/org/traccar/protocol/WatchProtocol.java
@@ -44,7 +44,7 @@ public class WatchProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new WatchFrameDecoder());
-                pipeline.addLast(new WatchProtocolEncoder());
+                pipeline.addLast(new WatchProtocolEncoder(WatchProtocol.this));
                 pipeline.addLast(new WatchProtocolDecoder(WatchProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/WatchProtocolEncoder.java b/src/main/java/org/traccar/protocol/WatchProtocolEncoder.java
index 264aec81f..f0dd6d094 100644
--- a/src/main/java/org/traccar/protocol/WatchProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/WatchProtocolEncoder.java
@@ -21,6 +21,7 @@ import io.netty.channel.Channel;
 import org.traccar.StringProtocolEncoder;
 import org.traccar.helper.DataConverter;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 import java.nio.charset.StandardCharsets;
 import java.text.DecimalFormat;
@@ -32,6 +33,10 @@ import java.util.TimeZone;
 
 public class WatchProtocolEncoder extends StringProtocolEncoder implements StringProtocolEncoder.ValueFormatter {
 
+    public WatchProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     public String formatValue(String key, Object value) {
         if (key.equals(Command.KEY_TIMEZONE)) {
diff --git a/src/main/java/org/traccar/protocol/WialonProtocol.java b/src/main/java/org/traccar/protocol/WialonProtocol.java
index 06b54dceb..05f9b4c77 100644
--- a/src/main/java/org/traccar/protocol/WialonProtocol.java
+++ b/src/main/java/org/traccar/protocol/WialonProtocol.java
@@ -45,7 +45,7 @@ public class WialonProtocol extends BaseProtocol {
                 } else {
                     pipeline.addLast(new StringDecoder());
                 }
-                pipeline.addLast(new WialonProtocolEncoder());
+                pipeline.addLast(new WialonProtocolEncoder(WialonProtocol.this));
                 pipeline.addLast(new WialonProtocolDecoder(WialonProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/WialonProtocolEncoder.java b/src/main/java/org/traccar/protocol/WialonProtocolEncoder.java
index 9ff1631eb..488d6b38a 100644
--- a/src/main/java/org/traccar/protocol/WialonProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/WialonProtocolEncoder.java
@@ -18,9 +18,14 @@ package org.traccar.protocol;
 
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class WialonProtocolEncoder extends StringProtocolEncoder {
 
+    public WialonProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected Object encodeCommand(Command command) {
         switch (command.getType()) {
diff --git a/src/main/java/org/traccar/protocol/WondexProtocol.java b/src/main/java/org/traccar/protocol/WondexProtocol.java
index 8c6283d66..ff3dd7c86 100644
--- a/src/main/java/org/traccar/protocol/WondexProtocol.java
+++ b/src/main/java/org/traccar/protocol/WondexProtocol.java
@@ -25,7 +25,7 @@ import io.netty.handler.codec.string.StringEncoder;
 public class WondexProtocol extends BaseProtocol {
 
     public WondexProtocol() {
-        setTextCommandEncoder(new WondexProtocolEncoder());
+        setTextCommandEncoder(new WondexProtocolEncoder(WondexProtocol.this));
         setSupportedCommands(
                 Command.TYPE_GET_DEVICE_STATUS,
                 Command.TYPE_GET_MODEM_STATUS,
@@ -38,7 +38,7 @@ public class WondexProtocol extends BaseProtocol {
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new WondexFrameDecoder());
                 pipeline.addLast(new StringEncoder());
-                pipeline.addLast(new WondexProtocolEncoder());
+                pipeline.addLast(new WondexProtocolEncoder(WondexProtocol.this));
                 pipeline.addLast(new WondexProtocolDecoder(WondexProtocol.this));
             }
         });
@@ -46,7 +46,7 @@ public class WondexProtocol extends BaseProtocol {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new StringEncoder());
-                pipeline.addLast(new WondexProtocolEncoder());
+                pipeline.addLast(new WondexProtocolEncoder(WondexProtocol.this));
                 pipeline.addLast(new WondexProtocolDecoder(WondexProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/WondexProtocolEncoder.java b/src/main/java/org/traccar/protocol/WondexProtocolEncoder.java
index f9e8eeb9b..d9ebf4daa 100644
--- a/src/main/java/org/traccar/protocol/WondexProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/WondexProtocolEncoder.java
@@ -17,9 +17,14 @@ package org.traccar.protocol;
 
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class WondexProtocolEncoder extends StringProtocolEncoder {
 
+    public WondexProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected Object encodeCommand(Command command) {
 
diff --git a/src/main/java/org/traccar/protocol/XexunProtocol.java b/src/main/java/org/traccar/protocol/XexunProtocol.java
index 0005270fb..9119bc2e0 100644
--- a/src/main/java/org/traccar/protocol/XexunProtocol.java
+++ b/src/main/java/org/traccar/protocol/XexunProtocol.java
@@ -42,7 +42,7 @@ public class XexunProtocol extends BaseProtocol {
                 }
                 pipeline.addLast(new StringEncoder());
                 pipeline.addLast(new StringDecoder());
-                pipeline.addLast(new XexunProtocolEncoder());
+                pipeline.addLast(new XexunProtocolEncoder(XexunProtocol.this));
                 pipeline.addLast(new XexunProtocolDecoder(XexunProtocol.this, full));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/XexunProtocolEncoder.java b/src/main/java/org/traccar/protocol/XexunProtocolEncoder.java
index 515cfbbd0..c432396aa 100644
--- a/src/main/java/org/traccar/protocol/XexunProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/XexunProtocolEncoder.java
@@ -17,9 +17,14 @@ package org.traccar.protocol;
 
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class XexunProtocolEncoder extends StringProtocolEncoder {
 
+    public XexunProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected Object encodeCommand(Command command) {
 
diff --git a/src/main/java/org/traccar/protocol/XirgoProtocol.java b/src/main/java/org/traccar/protocol/XirgoProtocol.java
index 4979fda5d..e96ea38d3 100644
--- a/src/main/java/org/traccar/protocol/XirgoProtocol.java
+++ b/src/main/java/org/traccar/protocol/XirgoProtocol.java
@@ -35,7 +35,7 @@ public class XirgoProtocol extends BaseProtocol {
                 pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, "##"));
                 pipeline.addLast(new StringEncoder());
                 pipeline.addLast(new StringDecoder());
-                pipeline.addLast(new XirgoProtocolEncoder());
+                pipeline.addLast(new XirgoProtocolEncoder(XirgoProtocol.this));
                 pipeline.addLast(new XirgoProtocolDecoder(XirgoProtocol.this));
             }
         });
@@ -44,7 +44,7 @@ public class XirgoProtocol extends BaseProtocol {
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new StringEncoder());
                 pipeline.addLast(new StringDecoder());
-                pipeline.addLast(new XirgoProtocolEncoder());
+                pipeline.addLast(new XirgoProtocolEncoder(XirgoProtocol.this));
                 pipeline.addLast(new XirgoProtocolDecoder(XirgoProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/XirgoProtocolEncoder.java b/src/main/java/org/traccar/protocol/XirgoProtocolEncoder.java
index dd5e30cca..b2465fbbc 100644
--- a/src/main/java/org/traccar/protocol/XirgoProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/XirgoProtocolEncoder.java
@@ -17,9 +17,14 @@ package org.traccar.protocol;
 
 import org.traccar.StringProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class XirgoProtocolEncoder extends StringProtocolEncoder {
 
+    public XirgoProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     @Override
     protected Object encodeCommand(Command command) {
 
diff --git a/src/main/java/org/traccar/protocol/Xrb28Protocol.java b/src/main/java/org/traccar/protocol/Xrb28Protocol.java
index b1f1c34fb..b984d2a79 100644
--- a/src/main/java/org/traccar/protocol/Xrb28Protocol.java
+++ b/src/main/java/org/traccar/protocol/Xrb28Protocol.java
@@ -40,7 +40,7 @@ public class Xrb28Protocol extends BaseProtocol {
                 pipeline.addLast(new LineBasedFrameDecoder(1024));
                 pipeline.addLast(new StringEncoder(StandardCharsets.ISO_8859_1));
                 pipeline.addLast(new StringDecoder());
-                pipeline.addLast(new Xrb28ProtocolEncoder());
+                pipeline.addLast(new Xrb28ProtocolEncoder(Xrb28Protocol.this));
                 pipeline.addLast(new Xrb28ProtocolDecoder(Xrb28Protocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/Xrb28ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Xrb28ProtocolEncoder.java
index 617639312..6d5f7948e 100644
--- a/src/main/java/org/traccar/protocol/Xrb28ProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/Xrb28ProtocolEncoder.java
@@ -18,9 +18,14 @@ package org.traccar.protocol;
 import io.netty.channel.Channel;
 import org.traccar.BaseProtocolEncoder;
 import org.traccar.model.Command;
+import org.traccar.Protocol;
 
 public class Xrb28ProtocolEncoder extends BaseProtocolEncoder {
 
+    public Xrb28ProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
     private String formatCommand(Command command, String content) {
         return String.format("\u00ff\u00ff*SCOS,OM,%s,%s#\n", getUniqueId(command.getDeviceId()), content);
     }