2 files changed, 21 insertions, 8 deletions
diff --git a/src/main/java/org/traccar/protocol/T800xProtocolDecoder.java b/src/main/java/org/traccar/protocol/T800xProtocolDecoder.java
index 5c2c26da7..4351a14bf 100644
--- a/src/main/java/org/traccar/protocol/T800xProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/T800xProtocolDecoder.java
@@ -37,10 +37,18 @@ import java.util.Date;
 
 public class T800xProtocolDecoder extends BaseProtocolDecoder {
 
+    private short header = DEFAULT_HEADER;
+
+    public short getHeader() {
+        return header;
+    }
+
     public T800xProtocolDecoder(Protocol protocol) {
         super(protocol);
     }
 
+    public static final short DEFAULT_HEADER = 0x2323;
+
     public static final int MSG_LOGIN = 0x01;
     public static final int MSG_GPS = 0x02;
     public static final int MSG_HEARTBEAT = 0x03;
@@ -110,7 +118,7 @@ public class T800xProtocolDecoder extends BaseProtocolDecoder {
 
         ByteBuf buf = (ByteBuf) msg;
 
-        short header = buf.readShort();
+        header = buf.readShort();
         int type = buf.readUnsignedByte();
         buf.readUnsignedShort(); // length
         int index = buf.readUnsignedShort();
@@ -128,7 +136,7 @@ public class T800xProtocolDecoder extends BaseProtocolDecoder {
 
         if (type == MSG_GPS || type == MSG_ALARM) {
 
-            return decodePosition(channel, deviceSession, buf, header, type, index, imei);
+            return decodePosition(channel, deviceSession, buf, type, index, imei);
 
         } else if (type == MSG_NETWORK) {
 
@@ -169,7 +177,7 @@ public class T800xProtocolDecoder extends BaseProtocolDecoder {
 
     private Position decodePosition(
             Channel channel, DeviceSession deviceSession,
-            ByteBuf buf, short header, int type, int index, ByteBuf imei) {
+            ByteBuf buf, int type, int index, ByteBuf imei) {
 
         Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
diff --git a/src/main/java/org/traccar/protocol/T800xProtocolEncoder.java b/src/main/java/org/traccar/protocol/T800xProtocolEncoder.java
index 439bedb57..74587c8b1 100644
--- a/src/main/java/org/traccar/protocol/T800xProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/T800xProtocolEncoder.java
@@ -17,6 +17,7 @@ package org.traccar.protocol;
 
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
 import org.traccar.BaseProtocolEncoder;
 import org.traccar.helper.DataConverter;
 import org.traccar.model.Command;
@@ -34,12 +35,11 @@ public class T800xProtocolEncoder extends BaseProtocolEncoder {
         super(protocol);
     }
 
-    private ByteBuf encodeContent(Command command, String content) {
+    private ByteBuf encodeContent(Command command, short header, String content) {
 
         ByteBuf buf = Unpooled.buffer();
 
-        buf.writeByte('%');
-        buf.writeByte('%');
+        buf.writeShort(header);
         buf.writeByte(T800xProtocolDecoder.MSG_COMMAND);
         buf.writeShort(7 + 8 + 1 + content.length());
         buf.writeShort(1); // serial number
@@ -51,11 +51,16 @@ public class T800xProtocolEncoder extends BaseProtocolEncoder {
     }
 
     @Override
-    protected Object encodeCommand(Command command) {
+    protected Object encodeCommand(Channel channel, Command command) {
+
+        short header = T800xProtocolDecoder.DEFAULT_HEADER;
+        if (channel != null) {
+            header = channel.pipeline().get(T800xProtocolDecoder.class).getHeader();
+        }
 
         switch (command.getType()) {
             case Command.TYPE_CUSTOM:
-                return encodeContent(command, command.getString(Command.KEY_DATA));
+                return encodeContent(command, header, command.getString(Command.KEY_DATA));
             default:
                 return null;
         }