Merge pull request #4 from traccar/master

upgrade to current master

261 files changed, 4195 insertions, 1738 deletions

diff --git a/src/org/traccar/BasePipelineFactory.java b/src/org/traccar/BasePipelineFactory.java
index aa188d209..5a077da7c 100644
--- a/src/org/traccar/BasePipelineFactory.java
+++ b/src/org/traccar/BasePipelineFactory.java
@@ -238,7 +238,8 @@ public abstract class BasePipelineFactory implements ChannelPipelineFactory {
         }
 
         if (Context.getConfig().getBoolean("forward.enable")) {
-            pipeline.addLast("webHandler", new WebDataHandler(Context.getConfig().getString("forward.url")));
+            pipeline.addLast("webHandler", new WebDataHandler(Context.getConfig().getString("forward.url"),
+                    Context.getConfig().getBoolean("forward.json")));
         }
 
         if (commandResultEventHandler != null) {
diff --git a/src/org/traccar/BaseProtocol.java b/src/org/traccar/BaseProtocol.java
index 90b9f21f2..07adbea5e 100644
--- a/src/org/traccar/BaseProtocol.java
+++ b/src/org/traccar/BaseProtocol.java
@@ -18,9 +18,9 @@ package org.traccar;
 import org.jboss.netty.buffer.ChannelBuffers;
 import org.jboss.netty.handler.codec.string.StringEncoder;
 import org.traccar.database.ActiveDevice;
+import org.traccar.helper.DataConverter;
 import org.traccar.model.Command;
 
-import javax.xml.bind.DatatypeConverter;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.HashSet;
@@ -79,7 +79,7 @@ public abstract class BaseProtocol implements Protocol {
             if (activeDevice.getChannel().getPipeline().get(StringEncoder.class) != null) {
                 activeDevice.write(data);
             } else {
-                activeDevice.write(ChannelBuffers.wrappedBuffer(DatatypeConverter.parseHexBinary(data)));
+                activeDevice.write(ChannelBuffers.wrappedBuffer(DataConverter.parseHex(data)));
             }
         } else {
             throw new RuntimeException("Command " + command.getType() + " is not supported in protocol " + getName());
diff --git a/src/org/traccar/BaseProtocolDecoder.java b/src/org/traccar/BaseProtocolDecoder.java
index e412134d1..3ea1208ca 100644
--- a/src/org/traccar/BaseProtocolDecoder.java
+++ b/src/org/traccar/BaseProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -29,6 +29,7 @@ import java.util.Collection;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.TimeZone;
 import java.sql.SQLException;
 
 public abstract class BaseProtocolDecoder extends ExtendedObjectDecoder {
@@ -81,6 +82,25 @@ public abstract class BaseProtocolDecoder extends ExtendedObjectDecoder {
         }
     }
 
+    protected TimeZone getTimeZone(long deviceId) {
+        TimeZone result = TimeZone.getTimeZone("UTC");
+        String timeZoneName = null;
+        if (Context.getDeviceManager() != null) {
+            timeZoneName = Context.getDeviceManager().lookupAttributeString(
+                    deviceId, "decoder.timezone", null, true);
+        }
+        if (timeZoneName != null) {
+            result = TimeZone.getTimeZone(timeZoneName);
+        } else {
+            int timeZoneOffset = Context.getConfig().getInteger(getProtocolName() + ".timezone", 0);
+            if (timeZoneOffset != 0) {
+                result.setRawOffset(timeZoneOffset * 1000);
+                Log.warning("Config parameter " + getProtocolName() + ".timezone is deprecated");
+            }
+        }
+        return result;
+    }
+
     private DeviceSession channelDeviceSession; // connection-based protocols
     private Map<SocketAddress, DeviceSession> addressDeviceSessions = new HashMap<>(); // connectionless protocols
 
@@ -229,8 +249,7 @@ public abstract class BaseProtocolDecoder extends ExtendedObjectDecoder {
     protected Object handleEmptyMessage(Channel channel, SocketAddress remoteAddress, Object msg) {
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
         if (Context.getConfig().getBoolean("database.saveEmpty") && deviceSession != null) {
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
             getLastLocation(position, null);
             return position;
diff --git a/src/org/traccar/BaseProtocolEncoder.java b/src/org/traccar/BaseProtocolEncoder.java
index 2c8a81868..18544fd28 100644
--- a/src/org/traccar/BaseProtocolEncoder.java
+++ b/src/org/traccar/BaseProtocolEncoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -45,7 +45,7 @@ public abstract class BaseProtocolEncoder extends OneToOneEncoder {
 
         if (msg instanceof Command) {
             Command command = (Command) msg;
-            Object encodedCommand = encodeCommand(command);
+            Object encodedCommand = encodeCommand(channel, command);
 
             // Log command
             StringBuilder s = new StringBuilder();
@@ -65,6 +65,12 @@ public abstract class BaseProtocolEncoder extends OneToOneEncoder {
         return msg;
     }
 
-    protected abstract Object encodeCommand(Command command);
+    protected Object encodeCommand(Channel channel, Command command) {
+        return encodeCommand(command);
+    }
+
+    protected Object encodeCommand(Command command) {
+        return null;
+    }
 
 }
diff --git a/src/org/traccar/Config.java b/src/org/traccar/Config.java
index 43f4632da..370123ae1 100644
--- a/src/org/traccar/Config.java
+++ b/src/org/traccar/Config.java
@@ -18,6 +18,7 @@ package org.traccar;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.InvalidPropertiesFormatException;
 import java.util.Properties;
 
 public class Config {
@@ -27,22 +28,26 @@ public class Config {
     private boolean useEnvironmentVariables;
 
     void load(String file) throws IOException {
-        Properties mainProperties = new Properties();
-        try (InputStream inputStream = new FileInputStream(file)) {
-            mainProperties.loadFromXML(inputStream);
-        }
+        try {
+            Properties mainProperties = new Properties();
+            try (InputStream inputStream = new FileInputStream(file)) {
+                mainProperties.loadFromXML(inputStream);
+            }
 
-        String defaultConfigFile = mainProperties.getProperty("config.default");
-        if (defaultConfigFile != null) {
-            try (InputStream inputStream = new FileInputStream(defaultConfigFile)) {
-                properties.loadFromXML(inputStream);
+            String defaultConfigFile = mainProperties.getProperty("config.default");
+            if (defaultConfigFile != null) {
+                try (InputStream inputStream = new FileInputStream(defaultConfigFile)) {
+                    properties.loadFromXML(inputStream);
+                }
             }
-        }
 
-        properties.putAll(mainProperties); // override defaults
+            properties.putAll(mainProperties); // override defaults
 
-        useEnvironmentVariables = Boolean.parseBoolean(System.getenv("CONFIG_USE_ENVIRONMENT_VARIABLES"))
-                || Boolean.parseBoolean(properties.getProperty("config.useEnvironmentVariables"));
+            useEnvironmentVariables = Boolean.parseBoolean(System.getenv("CONFIG_USE_ENVIRONMENT_VARIABLES"))
+                    || Boolean.parseBoolean(properties.getProperty("config.useEnvironmentVariables"));
+        } catch (InvalidPropertiesFormatException e) {
+            throw new RuntimeException("Configuration file is not a valid XML document", e);
+        }
     }
 
     public boolean hasKey(String key) {
diff --git a/src/org/traccar/Context.java b/src/org/traccar/Context.java
index 3681cc2cc..67fd02f75 100644
--- a/src/org/traccar/Context.java
+++ b/src/org/traccar/Context.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,6 +35,7 @@ import org.traccar.database.DeviceManager;
 import org.traccar.database.DriversManager;
 import org.traccar.database.IdentityManager;
 import org.traccar.database.LdapProvider;
+import org.traccar.database.MaintenancesManager;
 import org.traccar.database.MediaManager;
 import org.traccar.database.NotificationManager;
 import org.traccar.database.PermissionsManager;
@@ -64,6 +65,7 @@ import org.traccar.model.Device;
 import org.traccar.model.Driver;
 import org.traccar.model.Geofence;
 import org.traccar.model.Group;
+import org.traccar.model.Maintenance;
 import org.traccar.model.Notification;
 import org.traccar.model.User;
 import org.traccar.geolocation.GoogleGeolocationProvider;
@@ -232,6 +234,12 @@ public final class Context {
         return commandsManager;
     }
 
+    private static MaintenancesManager maintenancesManager;
+
+    public static MaintenancesManager getMaintenancesManager() {
+        return maintenancesManager;
+    }
+
     private static StatisticsManager statisticsManager;
 
     public static StatisticsManager getStatisticsManager() {
@@ -337,9 +345,7 @@ public final class Context {
             ldapProvider = new LdapProvider(config);
         }
 
-        if (config.hasKey("media.path")) {
-            mediaManager = new MediaManager(config);
-        }
+        mediaManager = new MediaManager(config.getString("media.path"));
 
         if (dataManager != null) {
             usersManager = new UsersManager(dataManager);
@@ -421,6 +427,7 @@ public final class Context {
 
         geofenceManager = new GeofenceManager(dataManager);
         calendarManager = new CalendarManager(dataManager);
+        maintenancesManager = new MaintenancesManager(dataManager);
         notificationManager = new NotificationManager(dataManager);
         Properties velocityProperties = new Properties();
         velocityProperties.setProperty("file.resource.loader.path",
@@ -471,6 +478,8 @@ public final class Context {
             return (BaseObjectManager<T>) driversManager;
         } else if (clazz.equals(Command.class)) {
             return (BaseObjectManager<T>) commandsManager;
+        } else if (clazz.equals(Maintenance.class)) {
+            return (BaseObjectManager<T>) maintenancesManager;
         } else if (clazz.equals(Notification.class)) {
             return (BaseObjectManager<T>) notificationManager;
         }
diff --git a/src/org/traccar/DefaultDataHandler.java b/src/org/traccar/DefaultDataHandler.java
index e32fe0e7d..1ac3efc77 100644
--- a/src/org/traccar/DefaultDataHandler.java
+++ b/src/org/traccar/DefaultDataHandler.java
@@ -24,7 +24,7 @@ public class DefaultDataHandler extends BaseDataHandler {
     protected Position handlePosition(Position position) {
 
         try {
-            Context.getDataManager().addPosition(position);
+            Context.getDataManager().addObject(position);
         } catch (Exception error) {
             Log.warning(error);
         }
diff --git a/src/org/traccar/DeviceSession.java b/src/org/traccar/DeviceSession.java
index 36958287d..322381807 100644
--- a/src/org/traccar/DeviceSession.java
+++ b/src/org/traccar/DeviceSession.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,6 +15,8 @@
  */
 package org.traccar;
 
+import java.util.TimeZone;
+
 public class DeviceSession {
 
     private final long deviceId;
@@ -27,4 +29,14 @@ public class DeviceSession {
         return deviceId;
     }
 
+    private TimeZone timeZone;
+
+    public void setTimeZone(TimeZone timeZone) {
+        this.timeZone = timeZone;
+    }
+
+    public TimeZone getTimeZone() {
+        return timeZone;
+    }
+
 }
diff --git a/src/org/traccar/ExtendedObjectDecoder.java b/src/org/traccar/ExtendedObjectDecoder.java
index 268e6f688..75a24212f 100644
--- a/src/org/traccar/ExtendedObjectDecoder.java
+++ b/src/org/traccar/ExtendedObjectDecoder.java
@@ -23,9 +23,9 @@ import org.jboss.netty.channel.ChannelHandlerContext;
 import org.jboss.netty.channel.ChannelUpstreamHandler;
 import org.jboss.netty.channel.Channels;
 import org.jboss.netty.channel.MessageEvent;
+import org.traccar.helper.DataConverter;
 import org.traccar.model.Position;
 
-import javax.xml.bind.DatatypeConverter;
 import java.net.SocketAddress;
 import java.nio.charset.StandardCharsets;
 import java.util.Collection;
@@ -39,7 +39,7 @@ public abstract class ExtendedObjectDecoder implements ChannelUpstreamHandler {
                 ChannelBuffer buf = (ChannelBuffer) originalMessage;
                 position.set(Position.KEY_ORIGINAL, ChannelBuffers.hexDump(buf, 0, buf.writerIndex()));
             } else if (originalMessage instanceof String) {
-                position.set(Position.KEY_ORIGINAL, DatatypeConverter.printHexBinary(
+                position.set(Position.KEY_ORIGINAL, DataConverter.printHex(
                                 ((String) originalMessage).getBytes(StandardCharsets.US_ASCII)));
             }
         }
diff --git a/src/org/traccar/FilterHandler.java b/src/org/traccar/FilterHandler.java
index 4cd3eb0eb..c6363813c 100644
--- a/src/org/traccar/FilterHandler.java
+++ b/src/org/traccar/FilterHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2014 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,9 +26,11 @@ public class FilterHandler extends BaseDataHandler {
     private boolean filterDuplicate;
     private long filterFuture;
     private boolean filterApproximate;
+    private int filterAccuracy;
     private boolean filterStatic;
     private int filterDistance;
     private int filterMaxSpeed;
+    private long filterMinPeriod;
     private long skipLimit;
     private boolean skipAttributes;
 
@@ -48,6 +50,10 @@ public class FilterHandler extends BaseDataHandler {
         this.filterFuture = filterFuture;
     }
 
+    public void setFilterAccuracy(int filterAccuracy) {
+        this.filterAccuracy = filterAccuracy;
+    }
+
     public void setFilterApproximate(boolean filterApproximate) {
         this.filterApproximate = filterApproximate;
     }
@@ -64,6 +70,10 @@ public class FilterHandler extends BaseDataHandler {
         this.filterMaxSpeed = filterMaxSpeed;
     }
 
+    public void setFilterMinPeriod(int filterMinPeriod) {
+        this.filterMinPeriod = filterMinPeriod;
+    }
+
     public void setSkipLimit(long skipLimit) {
         this.skipLimit = skipLimit;
     }
@@ -79,10 +89,12 @@ public class FilterHandler extends BaseDataHandler {
             filterZero = config.getBoolean("filter.zero");
             filterDuplicate = config.getBoolean("filter.duplicate");
             filterFuture = config.getLong("filter.future") * 1000;
+            filterAccuracy = config.getInteger("filter.accuracy");
             filterApproximate = config.getBoolean("filter.approximate");
             filterStatic = config.getBoolean("filter.static");
             filterDistance = config.getInteger("filter.distance");
             filterMaxSpeed = config.getInteger("filter.maxSpeed");
+            filterMinPeriod = config.getInteger("filter.minPeriod") * 1000;
             skipLimit = config.getLong("filter.skipLimit") * 1000;
             skipAttributes = config.getBoolean("filter.skipAttributes.enable");
         }
@@ -114,6 +126,10 @@ public class FilterHandler extends BaseDataHandler {
         return filterFuture != 0 && position.getFixTime().getTime() > System.currentTimeMillis() + filterFuture;
     }
 
+    private boolean filterAccuracy(Position position) {
+        return filterAccuracy != 0 && position.getAccuracy() > filterAccuracy;
+    }
+
     private boolean filterApproximate(Position position) {
         return filterApproximate && position.getBoolean(Position.KEY_APPROXIMATE);
     }
@@ -138,9 +154,17 @@ public class FilterHandler extends BaseDataHandler {
         return false;
     }
 
+    private boolean filterMinPeriod(Position position, Position last) {
+        if (filterMinPeriod != 0 && last != null) {
+            long time = position.getFixTime().getTime() - last.getFixTime().getTime();
+            return time > 0 && time < filterMinPeriod;
+        }
+        return false;
+    }
+
     private boolean skipLimit(Position position, Position last) {
         if (skipLimit != 0 && last != null) {
-            return (position.getFixTime().getTime() - last.getFixTime().getTime()) > skipLimit;
+            return (position.getServerTime().getTime() - last.getServerTime().getTime()) > skipLimit;
         }
         return false;
     }
@@ -183,6 +207,9 @@ public class FilterHandler extends BaseDataHandler {
         if (filterFuture(position)) {
             filterType.append("Future ");
         }
+        if (filterAccuracy(position)) {
+            filterType.append("Accuracy ");
+        }
         if (filterApproximate(position)) {
             filterType.append("Approximate ");
         }
@@ -195,6 +222,9 @@ public class FilterHandler extends BaseDataHandler {
         if (filterMaxSpeed(position, last)) {
             filterType.append("MaxSpeed ");
         }
+        if (filterMinPeriod(position, last)) {
+            filterType.append("MinPeriod ");
+        }
 
         if (filterType.length() > 0) {
 
@@ -203,8 +233,6 @@ public class FilterHandler extends BaseDataHandler {
             message.append(filterType.toString());
             message.append("filters from device: ");
             message.append(Context.getIdentityManager().getById(position.getDeviceId()).getUniqueId());
-            message.append(" with id: ");
-            message.append(position.getDeviceId());
 
             Log.info(message.toString());
             return true;
diff --git a/src/org/traccar/MainEventHandler.java b/src/org/traccar/MainEventHandler.java
index 8e88e15b9..6228f3709 100644
--- a/src/org/traccar/MainEventHandler.java
+++ b/src/org/traccar/MainEventHandler.java
@@ -60,13 +60,18 @@ public class MainEventHandler extends IdleStateAwareChannelHandler {
             // Log position
             StringBuilder s = new StringBuilder();
             s.append(formatChannel(e.getChannel())).append(" ");
-            s.append("id: ").append(uniqueId).append(", ");
-            s.append("time: ").append(
-                    new SimpleDateFormat(Log.DATE_FORMAT).format(position.getFixTime())).append(", ");
-            s.append("lat: ").append(String.format("%.5f", position.getLatitude())).append(", ");
-            s.append("lon: ").append(String.format("%.5f", position.getLongitude())).append(", ");
-            s.append("speed: ").append(String.format("%.1f", position.getSpeed())).append(", ");
-            s.append("course: ").append(String.format("%.1f", position.getCourse()));
+            s.append("id: ").append(uniqueId);
+            s.append(", time: ").append(
+                    new SimpleDateFormat(Log.DATE_FORMAT).format(position.getFixTime()));
+            s.append(", lat: ").append(String.format("%.5f", position.getLatitude()));
+            s.append(", lon: ").append(String.format("%.5f", position.getLongitude()));
+            if (position.getSpeed() > 0) {
+                s.append(", speed: ").append(String.format("%.1f", position.getSpeed()));
+            }
+            s.append(", course: ").append(String.format("%.1f", position.getCourse()));
+            if (position.getAccuracy() > 0) {
+                s.append(", accuracy: ").append(String.format("%.1f", position.getAccuracy()));
+            }
             Object cmdResult = position.getAttributes().get(Position.KEY_RESULT);
             if (cmdResult != null) {
                 s.append(", result: ").append(cmdResult);
diff --git a/src/org/traccar/ServerManager.java b/src/org/traccar/ServerManager.java
index 9b1e2650d..45503b717 100644
--- a/src/org/traccar/ServerManager.java
+++ b/src/org/traccar/ServerManager.java
@@ -15,7 +15,11 @@
  */
 package org.traccar;
 
+import org.jboss.netty.channel.ChannelException;
+import org.traccar.helper.Log;
+
 import java.io.File;
+import java.net.BindException;
 import java.net.URI;
 import java.net.URL;
 import java.net.URLDecoder;
@@ -78,7 +82,13 @@ public class ServerManager {
 
     public void start() {
         for (TrackerServer server: serverList) {
-            server.start();
+            try {
+                server.start();
+            } catch (ChannelException e) {
+                if (e.getCause() instanceof BindException) {
+                    Log.warning("One of the protocols is disabled due to port conflict");
+                }
+            }
         }
     }
 
@@ -86,8 +96,6 @@ public class ServerManager {
         for (TrackerServer server: serverList) {
             server.stop();
         }
-
-        // Release resources
         GlobalChannelFactory.release();
         GlobalTimer.release();
     }
diff --git a/src/org/traccar/WebDataHandler.java b/src/org/traccar/WebDataHandler.java
index c64dcc81b..cdd9d0c11 100644
--- a/src/org/traccar/WebDataHandler.java
+++ b/src/org/traccar/WebDataHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,11 +16,14 @@
 package org.traccar;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
+import com.ning.http.client.AsyncHttpClient;
 import org.traccar.helper.Checksum;
 import org.traccar.helper.Log;
 import org.traccar.model.Device;
 import org.traccar.model.Position;
 
+import java.util.HashMap;
+import java.util.Map;
 import java.io.UnsupportedEncodingException;
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
@@ -32,9 +35,13 @@ import java.util.TimeZone;
 public class WebDataHandler extends BaseDataHandler {
 
     private final String url;
+    private final boolean json;
+    private static final String KEY_POSITION = "position";
+    private static final String KEY_DEVICE = "device";
 
-    public WebDataHandler(String url) {
+    public WebDataHandler(String url, boolean json) {
         this.url = url;
+        this.json = json;
     }
 
     private static String formatSentence(Position position) {
@@ -80,6 +87,7 @@ public class WebDataHandler extends BaseDataHandler {
         String request = url
                 .replace("{name}", device.getName())
                 .replace("{uniqueId}", device.getUniqueId())
+                .replace("{status}", device.getStatus())
                 .replace("{deviceId}", String.valueOf(position.getDeviceId()))
                 .replace("{protocol}", String.valueOf(position.getProtocol()))
                 .replace("{deviceTime}", String.valueOf(position.getDeviceTime().getTime()))
@@ -120,10 +128,37 @@ public class WebDataHandler extends BaseDataHandler {
 
     @Override
     protected Position handlePosition(Position position) {
+        if (json) {
+            AsyncHttpClient.BoundRequestBuilder requestBuilder = Context.getAsyncHttpClient().preparePost(url);
+            requestBuilder.setBodyEncoding(StandardCharsets.UTF_8.name());
 
-        Context.getAsyncHttpClient().prepareGet(formatRequest(position)).execute();
+            requestBuilder.addHeader("Content-Type", "application/json; charset=utf-8");
 
+            requestBuilder.setBody(prepareJsonPayload(position));
+            requestBuilder.execute();
+
+        } else {
+            Context.getAsyncHttpClient().prepareGet(formatRequest(position)).execute();
+        }
         return position;
     }
 
+    protected String prepareJsonPayload(Position position) {
+
+        Map<String, Object> data = new HashMap<>();
+        Device device = Context.getIdentityManager().getById(position.getDeviceId());
+
+        data.put(KEY_POSITION, position);
+
+        if (device != null) {
+            data.put(KEY_DEVICE, device);
+        }
+
+        try {
+            return Context.getObjectMapper().writeValueAsString(data);
+        } catch (JsonProcessingException e) {
+            Log.warning(e);
+            return null;
+        }
+    }
 }
diff --git a/src/org/traccar/api/BaseObjectResource.java b/src/org/traccar/api/BaseObjectResource.java
index 806c78624..7de6a3877 100644
--- a/src/org/traccar/api/BaseObjectResource.java
+++ b/src/org/traccar/api/BaseObjectResource.java
@@ -1,6 +1,6 @@
 /*
- * Copyright 2017 Anton Tananaev (anton@traccar.org)
- * Copyright 2017 Andrey Kunitsyn (andrey@traccar.org)
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 - 2018 Andrey Kunitsyn (andrey@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -33,9 +33,12 @@ import org.traccar.database.ManagableObjects;
 import org.traccar.database.SimpleObjectManager;
 import org.traccar.helper.LogAction;
 import org.traccar.model.BaseModel;
+import org.traccar.model.Calendar;
 import org.traccar.model.Command;
 import org.traccar.model.Device;
 import org.traccar.model.Group;
+import org.traccar.model.GroupedModel;
+import org.traccar.model.ScheduledModel;
 import org.traccar.model.User;
 
 public abstract class BaseObjectResource<T extends BaseModel> extends BaseResource {
@@ -77,6 +80,12 @@ public abstract class BaseObjectResource<T extends BaseModel> extends BaseResour
             Context.getPermissionsManager().checkDeviceLimit(getUserId());
         } else if (baseClass.equals(Command.class)) {
             Context.getPermissionsManager().checkLimitCommands(getUserId());
+        } else if (entity instanceof GroupedModel && ((GroupedModel) entity).getGroupId() != 0) {
+            Context.getPermissionsManager().checkPermission(
+                    Group.class, getUserId(), ((GroupedModel) entity).getGroupId());
+        } else if (entity instanceof ScheduledModel && ((ScheduledModel) entity).getCalendarId() != 0) {
+            Context.getPermissionsManager().checkPermission(
+                    Calendar.class, getUserId(), ((ScheduledModel) entity).getCalendarId());
         }
 
         BaseObjectManager<T> manager = Context.getManager(baseClass);
@@ -106,6 +115,12 @@ public abstract class BaseObjectResource<T extends BaseModel> extends BaseResour
             Context.getPermissionsManager().checkUserUpdate(getUserId(), before, (User) entity);
         } else if (baseClass.equals(Command.class)) {
             Context.getPermissionsManager().checkLimitCommands(getUserId());
+        } else if (entity instanceof GroupedModel && ((GroupedModel) entity).getGroupId() != 0) {
+            Context.getPermissionsManager().checkPermission(
+                    Group.class, getUserId(), ((GroupedModel) entity).getGroupId());
+        } else if (entity instanceof ScheduledModel && ((ScheduledModel) entity).getCalendarId() != 0) {
+            Context.getPermissionsManager().checkPermission(
+                    Calendar.class, getUserId(), ((ScheduledModel) entity).getCalendarId());
         }
         Context.getPermissionsManager().checkPermission(baseClass, getUserId(), entity.getId());
 
@@ -141,12 +156,19 @@ public abstract class BaseObjectResource<T extends BaseModel> extends BaseResour
             }
         }
         if (baseClass.equals(Group.class) || baseClass.equals(Device.class) || baseClass.equals(User.class)) {
+            if (baseClass.equals(Group.class)) {
+                Context.getGroupsManager().updateGroupCache(true);
+                Context.getDeviceManager().updateDeviceCache(true);
+            }
             Context.getPermissionsManager().refreshDeviceAndGroupPermissions();
             if (baseClass.equals(User.class)) {
                 Context.getPermissionsManager().refreshAllUsersPermissions();
             } else {
                 Context.getPermissionsManager().refreshAllExtendedPermissions();
             }
+        } else if (baseClass.equals(Calendar.class)) {
+            Context.getGeofenceManager().refreshItems();
+            Context.getNotificationManager().refreshItems();
         }
         return Response.noContent().build();
     }
diff --git a/src/org/traccar/api/MediaFilter.java b/src/org/traccar/api/MediaFilter.java
new file mode 100644
index 000000000..25e242b01
--- /dev/null
+++ b/src/org/traccar/api/MediaFilter.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2018 Andrey Kunitsyn (andrey@traccar.org)
+ *
+ * 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.api;
+
+import java.io.IOException;
+import java.sql.SQLException;
+
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpSession;
+
+import org.traccar.Context;
+import org.traccar.api.resource.SessionResource;
+import org.traccar.helper.Log;
+import org.traccar.model.Device;
+
+public class MediaFilter implements Filter {
+
+    @Override
+    public void init(FilterConfig filterConfig) throws ServletException {
+    }
+
+    @Override
+    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
+            throws IOException, ServletException {
+        HttpServletResponse httpResponse = (HttpServletResponse) response;
+        try {
+            HttpSession session = ((HttpServletRequest) request).getSession(false);
+            Long userId = null;
+            if (session != null) {
+                userId = (Long) session.getAttribute(SessionResource.USER_ID_KEY);
+                if (userId != null) {
+                    Context.getPermissionsManager().checkUserEnabled(userId);
+                    Context.getStatisticsManager().registerRequest(userId);
+                }
+            }
+            if (userId == null) {
+                httpResponse.sendError(HttpServletResponse.SC_UNAUTHORIZED);
+                return;
+            }
+
+            String path = ((HttpServletRequest) request).getPathInfo();
+            String[] parts = path.split("/");
+            if (parts.length < 2 || parts.length == 2 && !path.endsWith("/")) {
+                Context.getPermissionsManager().checkAdmin(userId);
+            } else {
+                Device device = Context.getDeviceManager().getByUniqueId(parts[1]);
+                if (device != null) {
+                    Context.getPermissionsManager().checkDevice(userId, device.getId());
+                } else {
+                    httpResponse.sendError(HttpServletResponse.SC_NOT_FOUND);
+                    return;
+                }
+            }
+
+            chain.doFilter(request, response);
+        } catch (SecurityException e) {
+            httpResponse.setStatus(HttpServletResponse.SC_FORBIDDEN);
+            httpResponse.getWriter().println(Log.exceptionStack(e));
+        } catch (SQLException e) {
+            httpResponse.setStatus(HttpServletResponse.SC_BAD_REQUEST);
+            httpResponse.getWriter().println(Log.exceptionStack(e));
+        }
+    }
+
+    @Override
+    public void destroy() {
+    }
+
+}
diff --git a/src/org/traccar/api/SecurityRequestFilter.java b/src/org/traccar/api/SecurityRequestFilter.java
index 7024bdbc9..aace9f705 100644
--- a/src/org/traccar/api/SecurityRequestFilter.java
+++ b/src/org/traccar/api/SecurityRequestFilter.java
@@ -17,6 +17,7 @@ package org.traccar.api;
 
 import org.traccar.Context;
 import org.traccar.api.resource.SessionResource;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.Log;
 import org.traccar.model.User;
 
@@ -28,7 +29,6 @@ import javax.ws.rs.container.ContainerRequestFilter;
 import javax.ws.rs.container.ResourceInfo;
 import javax.ws.rs.core.Response;
 import javax.ws.rs.core.SecurityContext;
-import javax.xml.bind.DatatypeConverter;
 import java.lang.reflect.Method;
 import java.nio.charset.StandardCharsets;
 import java.sql.SQLException;
@@ -43,7 +43,7 @@ public class SecurityRequestFilter implements ContainerRequestFilter {
 
     public static String[] decodeBasicAuth(String auth) {
         auth = auth.replaceFirst("[B|b]asic ", "");
-        byte[] decodedBytes = DatatypeConverter.parseBase64Binary(auth);
+        byte[] decodedBytes = DataConverter.parseBase64(auth);
         if (decodedBytes != null && decodedBytes.length > 0) {
             return new String(decodedBytes, StandardCharsets.US_ASCII).split(":", 2);
         }
diff --git a/src/org/traccar/api/resource/AttributeResource.java b/src/org/traccar/api/resource/AttributeResource.java
index 26a1f6931..8f0bac473 100644
--- a/src/org/traccar/api/resource/AttributeResource.java
+++ b/src/org/traccar/api/resource/AttributeResource.java
@@ -52,9 +52,11 @@ public class AttributeResource extends ExtendedObjectResource<Attribute> {
             if (result != null) {
                 switch (entity.getType()) {
                     case "number":
-                        return Response.ok((Number) result).build();
+                        Number numberValue = (Number) result;
+                        return Response.ok(numberValue).build();
                     case "boolean":
-                        return Response.ok((Boolean) result).build();
+                        Boolean booleanValue = (Boolean) result;
+                        return Response.ok(booleanValue).build();
                     default:
                         return Response.ok(result.toString()).build();
                 }
diff --git a/src/org/traccar/api/resource/DeviceResource.java b/src/org/traccar/api/resource/DeviceResource.java
index 0ea532567..87927e45b 100644
--- a/src/org/traccar/api/resource/DeviceResource.java
+++ b/src/org/traccar/api/resource/DeviceResource.java
@@ -71,7 +71,7 @@ public class DeviceResource extends BaseObjectResource<Device> {
                 result = deviceManager.getUserItems(userId);
             }
         } else {
-            result = new HashSet<Long>();
+            result = new HashSet<>();
             for (String uniqueId : uniqueIds) {
                 Device device = deviceManager.getByUniqueId(uniqueId);
                 Context.getPermissionsManager().checkDevice(getUserId(), device.getId());
@@ -88,7 +88,10 @@ public class DeviceResource extends BaseObjectResource<Device> {
     @Path("{id}/distance")
     @PUT
     public Response updateTotalDistance(DeviceTotalDistance entity) throws SQLException {
-        Context.getPermissionsManager().checkAdmin(getUserId());
+        if (!Context.getPermissionsManager().getUserAdmin(getUserId())) {
+            Context.getPermissionsManager().checkManager(getUserId());
+            Context.getPermissionsManager().checkPermission(Device.class, getUserId(), entity.getDeviceId());
+        }
         Context.getDeviceManager().resetTotalDistance(entity);
         LogAction.resetTotalDistance(getUserId(), entity.getDeviceId());
         return Response.noContent().build();
diff --git a/src/org/traccar/api/resource/EventResource.java b/src/org/traccar/api/resource/EventResource.java
index a7cf9edbd..e0ccf7020 100644
--- a/src/org/traccar/api/resource/EventResource.java
+++ b/src/org/traccar/api/resource/EventResource.java
@@ -13,6 +13,7 @@ import org.traccar.Context;
 import org.traccar.api.BaseResource;
 import org.traccar.model.Event;
 import org.traccar.model.Geofence;
+import org.traccar.model.Maintenance;
 
 @Path("events")
 @Produces(MediaType.APPLICATION_JSON)
@@ -28,6 +29,9 @@ public class EventResource extends BaseResource {
         if (event.getGeofenceId() != 0) {
             Context.getPermissionsManager().checkPermission(Geofence.class, getUserId(), event.getGeofenceId());
         }
+        if (event.getMaintenanceId() != 0) {
+            Context.getPermissionsManager().checkPermission(Maintenance.class, getUserId(), event.getMaintenanceId());
+        }
         return event;
     }
 
diff --git a/src/org/traccar/api/resource/MaintenanceResource.java b/src/org/traccar/api/resource/MaintenanceResource.java
new file mode 100644
index 000000000..b3726b429
--- /dev/null
+++ b/src/org/traccar/api/resource/MaintenanceResource.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2018 Andrey Kunitsyn (andrey@traccar.org)
+ *
+ * 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.api.resource;
+
+import javax.ws.rs.Consumes;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+
+import org.traccar.api.ExtendedObjectResource;
+import org.traccar.model.Maintenance;
+
+@Path("maintenances")
+@Produces(MediaType.APPLICATION_JSON)
+@Consumes(MediaType.APPLICATION_JSON)
+public class MaintenanceResource extends ExtendedObjectResource<Maintenance> {
+
+    public MaintenanceResource() {
+        super(Maintenance.class);
+    }
+
+}
diff --git a/src/org/traccar/api/resource/SessionResource.java b/src/org/traccar/api/resource/SessionResource.java
index 3f7842626..fd331c766 100644
--- a/src/org/traccar/api/resource/SessionResource.java
+++ b/src/org/traccar/api/resource/SessionResource.java
@@ -17,6 +17,7 @@ package org.traccar.api.resource;
 
 import org.traccar.Context;
 import org.traccar.api.BaseResource;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.LogAction;
 import org.traccar.model.User;
 
@@ -34,7 +35,6 @@ import javax.ws.rs.QueryParam;
 import javax.ws.rs.WebApplicationException;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
-import javax.xml.bind.DatatypeConverter;
 
 import java.io.UnsupportedEncodingException;
 import java.net.URLDecoder;
@@ -61,15 +61,14 @@ public class SessionResource extends BaseResource {
             Cookie[] cookies = request.getCookies();
             String email = null, password = null;
             if (cookies != null) {
-                for (int i = 0; i < cookies.length; i++) {
-                    if (cookies[i].getName().equals(USER_COOKIE_KEY)) {
-                        byte[] emailBytes = DatatypeConverter.parseBase64Binary(
-                                URLDecoder.decode(cookies[i].getValue(), StandardCharsets.US_ASCII.name()));
+                for (Cookie cookie : cookies) {
+                    if (cookie.getName().equals(USER_COOKIE_KEY)) {
+                        byte[] emailBytes = DataConverter.parseBase64(
+                                URLDecoder.decode(cookie.getValue(), StandardCharsets.US_ASCII.name()));
                         email = new String(emailBytes, StandardCharsets.UTF_8);
-                    }
-                    if (cookies[i].getName().equals(PASS_COOKIE_KEY)) {
-                        byte[] passwordBytes = DatatypeConverter.parseBase64Binary(
-                                URLDecoder.decode(cookies[i].getValue(), StandardCharsets.US_ASCII.name()));
+                    } else if (cookie.getName().equals(PASS_COOKIE_KEY)) {
+                        byte[] passwordBytes = DataConverter.parseBase64(
+                                URLDecoder.decode(cookie.getValue(), StandardCharsets.US_ASCII.name()));
                         password = new String(passwordBytes, StandardCharsets.UTF_8);
                     }
                 }
diff --git a/src/org/traccar/database/DataManager.java b/src/org/traccar/database/DataManager.java
index f813426d3..84f8f0394 100644
--- a/src/org/traccar/database/DataManager.java
+++ b/src/org/traccar/database/DataManager.java
@@ -48,6 +48,7 @@ import org.traccar.model.Driver;
 import org.traccar.model.Event;
 import org.traccar.model.Geofence;
 import org.traccar.model.Group;
+import org.traccar.model.Maintenance;
 import org.traccar.model.ManagedUser;
 import org.traccar.model.Notification;
 import org.traccar.model.Permission;
@@ -242,12 +243,16 @@ public class DataManager {
 
     public String getQuery(String action, Class<?> owner, Class<?> property) {
         String queryName;
-        if (action.equals(ACTION_SELECT_ALL)) {
-            queryName = "database.select" + owner.getSimpleName() + property.getSimpleName() + "s";
-        } else if (action.equals(ACTION_INSERT)) {
-            queryName = "database.link" + owner.getSimpleName() + property.getSimpleName();
-        } else {
-            queryName = "database.unlink" + owner.getSimpleName() + property.getSimpleName();
+        switch (action) {
+            case ACTION_SELECT_ALL:
+                queryName = "database.select" + owner.getSimpleName() + property.getSimpleName() + "s";
+                break;
+            case ACTION_INSERT:
+                queryName = "database.link" + owner.getSimpleName() + property.getSimpleName();
+                break;
+            default:
+                queryName = "database.unlink" + owner.getSimpleName() + property.getSimpleName();
+                break;
         }
         String query = config.getString(queryName);
         if (query == null) {
@@ -335,13 +340,6 @@ public class DataManager {
                 .executeQuery(Position.class);
     }
 
-    public void addPosition(Position position) throws SQLException {
-        position.setId(QueryBuilder.create(dataSource, getQuery(ACTION_INSERT, Position.class), true)
-                .setObject(position)
-                .setDate("serverTime", new Date())
-                .executeUpdate());
-    }
-
     public void updateLatestPosition(Position position) throws SQLException {
         QueryBuilder.create(dataSource, getQuery("database.updateLatestPosition"))
                 .setDate("now", new Date())
@@ -408,6 +406,8 @@ public class DataManager {
                 return Calendar.class;
             case "command":
                 return Command.class;
+            case "maintenance":
+                return Maintenance.class;
             case "notification":
                 return Notification.class;
             default:
diff --git a/src/org/traccar/database/DeviceManager.java b/src/org/traccar/database/DeviceManager.java
index cb410b7c0..c59061b7f 100644
--- a/src/org/traccar/database/DeviceManager.java
+++ b/src/org/traccar/database/DeviceManager.java
@@ -65,7 +65,7 @@ public class DeviceManager extends BaseObjectManager<Device> implements Identity
         refreshLastPositions();
     }
 
-    private void updateDeviceCache(boolean force) throws SQLException {
+    public void updateDeviceCache(boolean force) throws SQLException {
         long lastUpdate = devicesLastUpdate.get();
         if ((force || System.currentTimeMillis() - lastUpdate > dataRefreshDelay)
                 && devicesLastUpdate.compareAndSet(lastUpdate, System.currentTimeMillis())) {
@@ -355,7 +355,7 @@ public class DeviceManager extends BaseObjectManager<Device> implements Identity
         Position last = positions.get(deviceTotalDistance.getDeviceId());
         if (last != null) {
             last.getAttributes().put(Position.KEY_TOTAL_DISTANCE, deviceTotalDistance.getTotalDistance());
-            getDataManager().addPosition(last);
+            getDataManager().addObject(last);
             updateLatestPosition(last);
         } else {
             throw new IllegalArgumentException();
diff --git a/src/org/traccar/database/ExtendedObjectManager.java b/src/org/traccar/database/ExtendedObjectManager.java
index 16785cb37..c9e349136 100644
--- a/src/org/traccar/database/ExtendedObjectManager.java
+++ b/src/org/traccar/database/ExtendedObjectManager.java
@@ -95,7 +95,7 @@ public abstract class ExtendedObjectManager<T extends BaseModel> extends SimpleO
                     long groupId = device.getGroupId();
                     while (groupId != 0) {
                         getAllDeviceItems(device.getId()).addAll(getGroupItems(groupId));
-                        Group group = (Group) Context.getGroupsManager().getById(groupId);
+                        Group group = Context.getGroupsManager().getById(groupId);
                         if (group != null) {
                             groupId = group.getGroupId();
                         } else {
diff --git a/src/org/traccar/database/GroupsManager.java b/src/org/traccar/database/GroupsManager.java
index c0456085b..262f15519 100644
--- a/src/org/traccar/database/GroupsManager.java
+++ b/src/org/traccar/database/GroupsManager.java
@@ -47,7 +47,7 @@ public class GroupsManager extends BaseObjectManager<Group> implements Managable
         }
     }
 
-    private void updateGroupCache(boolean force) throws SQLException {
+    public void updateGroupCache(boolean force) throws SQLException {
         long lastUpdate = groupsLastUpdate.get();
         if ((force || System.currentTimeMillis() - lastUpdate > dataRefreshDelay)
                 && groupsLastUpdate.compareAndSet(lastUpdate, System.currentTimeMillis())) {
@@ -76,9 +76,9 @@ public class GroupsManager extends BaseObjectManager<Group> implements Managable
     }
 
     @Override
-    protected void updateCachedItem(Group group) {
+    public void updateItem(Group group) throws SQLException {
         checkGroupCycles(group);
-        super.updateCachedItem(group);
+        super.updateItem(group);
     }
 
     @Override
diff --git a/src/org/traccar/database/LdapProvider.java b/src/org/traccar/database/LdapProvider.java
index 2c4b7ceb1..44dd386ed 100644
--- a/src/org/traccar/database/LdapProvider.java
+++ b/src/org/traccar/database/LdapProvider.java
@@ -115,7 +115,7 @@ public class LdapProvider {
 
         SearchResult searchResult = null;
         if (results.hasMoreElements()) {
-            searchResult = (SearchResult) results.nextElement();
+            searchResult = results.nextElement();
             if (results.hasMoreElements()) {
                 Log.warning("Matched multiple users for the accountName: " + accountName);
                 return null;
diff --git a/src/org/traccar/database/MaintenancesManager.java b/src/org/traccar/database/MaintenancesManager.java
new file mode 100644
index 000000000..4e266cb78
--- /dev/null
+++ b/src/org/traccar/database/MaintenancesManager.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2018 Andrey Kunitsyn (andrey@traccar.org)
+ *
+ * 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.database;
+
+import org.traccar.model.Maintenance;
+
+public class MaintenancesManager extends ExtendedObjectManager<Maintenance> {
+
+    public MaintenancesManager(DataManager dataManager) {
+        super(dataManager, Maintenance.class);
+    }
+
+}
diff --git a/src/org/traccar/database/MediaManager.java b/src/org/traccar/database/MediaManager.java
index 2c448a20c..482442735 100644
--- a/src/org/traccar/database/MediaManager.java
+++ b/src/org/traccar/database/MediaManager.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,7 +16,6 @@
 package org.traccar.database;
 
 import org.jboss.netty.buffer.ChannelBuffer;
-import org.traccar.Config;
 import org.traccar.helper.Log;
 
 import java.io.File;
@@ -34,8 +33,8 @@ public class MediaManager {
 
     private String path;
 
-    public MediaManager(Config config) {
-        path = config.getString("media.path");
+    public MediaManager(String path) {
+        this.path = path;
     }
 
     private File createFile(String uniqueId, String name) throws IOException {
@@ -48,19 +47,21 @@ public class MediaManager {
     }
 
     public String writeFile(String uniqueId, ChannelBuffer buf, String extension) {
-        int size = buf.readableBytes();
-        String name = new SimpleDateFormat("yyyyMMddhhmmss").format(new Date()) + "." + extension;
-        try (FileOutputStream output = new FileOutputStream(createFile(uniqueId, name));
-                FileChannel fileChannel = output.getChannel()) {
-            ByteBuffer byteBuffer = buf.toByteBuffer();
-            int written = 0;
-            while (written < size) {
-                written += fileChannel.write(byteBuffer);
+        if (path != null) {
+            int size = buf.readableBytes();
+            String name = new SimpleDateFormat("yyyyMMddhhmmss").format(new Date()) + "." + extension;
+            try (FileOutputStream output = new FileOutputStream(createFile(uniqueId, name));
+                    FileChannel fileChannel = output.getChannel()) {
+                ByteBuffer byteBuffer = buf.toByteBuffer();
+                int written = 0;
+                while (written < size) {
+                    written += fileChannel.write(byteBuffer);
+                }
+                fileChannel.force(false);
+                return name;
+            } catch (IOException e) {
+                Log.warning(e);
             }
-            fileChannel.force(false);
-            return name;
-        } catch (IOException e) {
-            Log.warning(e);
         }
         return null;
     }
diff --git a/src/org/traccar/database/NotificationManager.java b/src/org/traccar/database/NotificationManager.java
index 4e6114001..3bc048356 100644
--- a/src/org/traccar/database/NotificationManager.java
+++ b/src/org/traccar/database/NotificationManager.java
@@ -1,6 +1,6 @@
 /*
- * Copyright 2016 - 2017 Anton Tananaev (anton@traccar.org)
- * Copyright 2016 - 2017 Andrey Kunitsyn (andrey@traccar.org)
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2018 Andrey Kunitsyn (andrey@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,6 +19,7 @@ package org.traccar.database;
 import java.lang.reflect.Field;
 import java.lang.reflect.Modifier;
 import java.sql.SQLException;
+import java.util.Date;
 import java.util.HashSet;
 import java.util.Map;
 import java.util.Map.Entry;
@@ -26,6 +27,7 @@ import java.util.Set;
 
 import org.traccar.Context;
 import org.traccar.helper.Log;
+import org.traccar.model.Calendar;
 import org.traccar.model.Event;
 import org.traccar.model.Notification;
 import org.traccar.model.Position;
@@ -42,12 +44,16 @@ public class NotificationManager extends ExtendedObjectManager<Notification> {
         geocodeOnRequest = Context.getConfig().getBoolean("geocoder.onRequest");
     }
 
-    private Set<Long> getEffectiveNotifications(long userId, long deviceId) {
+    private Set<Long> getEffectiveNotifications(long userId, long deviceId, Date time) {
         Set<Long> result = new HashSet<>();
         Set<Long> deviceNotifications = getAllDeviceItems(deviceId);
         for (long itemId : getUserItems(userId)) {
             if (getById(itemId).getAlways() || deviceNotifications.contains(itemId)) {
-                result.add(itemId);
+                long calendarId = getById(itemId).getCalendarId();
+                Calendar calendar = calendarId != 0 ? Context.getCalendarManager().getById(calendarId) : null;
+                if (calendar == null || calendar.checkMoment(time)) {
+                    result.add(itemId);
+                }
             }
         }
         return result;
@@ -67,13 +73,22 @@ public class NotificationManager extends ExtendedObjectManager<Notification> {
 
         long deviceId = event.getDeviceId();
         Set<Long> users = Context.getPermissionsManager().getDeviceUsers(deviceId);
+        Set<Long> usersToForward = null;
+        if (Context.getEventForwarder() != null) {
+            usersToForward = new HashSet<>();
+        }
         for (long userId : users) {
-            if (event.getGeofenceId() == 0 || Context.getGeofenceManager() != null
-                    && Context.getGeofenceManager().checkItemPermission(userId, event.getGeofenceId())) {
+            if ((event.getGeofenceId() == 0
+                    || Context.getGeofenceManager().checkItemPermission(userId, event.getGeofenceId()))
+                    && (event.getMaintenanceId() == 0
+                    || Context.getMaintenancesManager().checkItemPermission(userId, event.getMaintenanceId()))) {
+                if (usersToForward != null) {
+                    usersToForward.add(userId);
+                }
                 boolean sentWeb = false;
                 boolean sentMail = false;
                 boolean sentSms = Context.getSmppManager() == null;
-                for (long notificationId : getEffectiveNotifications(userId, deviceId)) {
+                for (long notificationId : getEffectiveNotifications(userId, deviceId, event.getServerTime())) {
                     Notification notification = getById(notificationId);
                     if (getById(notificationId).getType().equals(event.getType())) {
                         if (!sentWeb && notification.getWeb()) {
@@ -96,7 +111,7 @@ public class NotificationManager extends ExtendedObjectManager<Notification> {
             }
         }
         if (Context.getEventForwarder() != null) {
-            Context.getEventForwarder().forwardEvent(event, position);
+            Context.getEventForwarder().forwardEvent(event, position, usersToForward);
         }
     }
 
diff --git a/src/org/traccar/database/PermissionsManager.java b/src/org/traccar/database/PermissionsManager.java
index 60bda99ce..b5f062d2b 100644
--- a/src/org/traccar/database/PermissionsManager.java
+++ b/src/org/traccar/database/PermissionsManager.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,6 +25,7 @@ import org.traccar.model.Device;
 import org.traccar.model.Driver;
 import org.traccar.model.Geofence;
 import org.traccar.model.Group;
+import org.traccar.model.Maintenance;
 import org.traccar.model.ManagedUser;
 import org.traccar.model.Notification;
 import org.traccar.model.Permission;
@@ -57,7 +58,7 @@ public class PermissionsManager {
     }
 
     public User getUser(long userId) {
-        return (User) usersManager.getById(userId);
+        return usersManager.getById(userId);
     }
 
     public Set<Long> getGroupPermissions(long userId) {
@@ -337,6 +338,8 @@ public class PermissionsManager {
             manager = Context.getCalendarManager();
         } else if (object.equals(Command.class)) {
             manager = Context.getCommandsManager();
+        } else if (object.equals(Maintenance.class)) {
+            manager = Context.getMaintenancesManager();
         } else if (object.equals(Notification.class)) {
             manager = Context.getNotificationManager();
         } else {
@@ -362,6 +365,7 @@ public class PermissionsManager {
         Context.getDriversManager().refreshUserItems();
         Context.getAttributesManager().refreshUserItems();
         Context.getCommandsManager().refreshUserItems();
+        Context.getMaintenancesManager().refreshUserItems();
         if (Context.getNotificationManager() != null) {
             Context.getNotificationManager().refreshUserItems();
         }
@@ -374,6 +378,7 @@ public class PermissionsManager {
         Context.getDriversManager().refreshExtendedPermissions();
         Context.getAttributesManager().refreshExtendedPermissions();
         Context.getCommandsManager().refreshExtendedPermissions();
+        Context.getMaintenancesManager().refreshExtendedPermissions();
     }
 
     public void refreshPermissions(Permission permission) {
@@ -394,6 +399,8 @@ public class PermissionsManager {
                 Context.getCalendarManager().refreshUserItems();
             } else if (permission.getPropertyClass().equals(Command.class)) {
                 Context.getCommandsManager().refreshUserItems();
+            } else if (permission.getPropertyClass().equals(Maintenance.class)) {
+                Context.getMaintenancesManager().refreshUserItems();
             } else if (permission.getPropertyClass().equals(Notification.class)
                     && Context.getNotificationManager() != null) {
                 Context.getNotificationManager().refreshUserItems();
@@ -407,6 +414,8 @@ public class PermissionsManager {
                 Context.getAttributesManager().refreshExtendedPermissions();
             } else if (permission.getPropertyClass().equals(Command.class)) {
                 Context.getCommandsManager().refreshExtendedPermissions();
+            } else if (permission.getPropertyClass().equals(Maintenance.class)) {
+                Context.getMaintenancesManager().refreshExtendedPermissions();
             } else if (permission.getPropertyClass().equals(Notification.class)
                     && Context.getNotificationManager() != null) {
                 Context.getNotificationManager().refreshExtendedPermissions();
diff --git a/src/org/traccar/events/AlertEventHandler.java b/src/org/traccar/events/AlertEventHandler.java
index 003ccb662..7db371c70 100644
--- a/src/org/traccar/events/AlertEventHandler.java
+++ b/src/org/traccar/events/AlertEventHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,18 +19,34 @@ import java.util.Collections;
 import java.util.Map;
 
 import org.traccar.BaseEventHandler;
+import org.traccar.Context;
 import org.traccar.model.Event;
 import org.traccar.model.Position;
 
 public class AlertEventHandler extends BaseEventHandler {
 
+    private final boolean ignoreDuplicateAlerts;
+
+    public AlertEventHandler() {
+        ignoreDuplicateAlerts = Context.getConfig().getBoolean("event.ignoreDuplicateAlerts");
+    }
+
     @Override
     protected Map<Event, Position> analyzePosition(Position position) {
         Object alarm = position.getAttributes().get(Position.KEY_ALARM);
         if (alarm != null) {
-            Event event = new Event(Event.TYPE_ALARM, position.getDeviceId(), position.getId());
-            event.set(Position.KEY_ALARM, (String) alarm);
-            return Collections.singletonMap(event, position);
+            boolean ignoreAlert = false;
+            if (ignoreDuplicateAlerts) {
+                Position lastPosition = Context.getIdentityManager().getLastPosition(position.getDeviceId());
+                if (lastPosition != null && alarm.equals(lastPosition.getAttributes().get(Position.KEY_ALARM))) {
+                    ignoreAlert = true;
+                }
+            }
+            if (!ignoreAlert) {
+                Event event = new Event(Event.TYPE_ALARM, position.getDeviceId(), position.getId());
+                event.set(Position.KEY_ALARM, (String) alarm);
+                return Collections.singletonMap(event, position);
+            }
         }
         return null;
     }
diff --git a/src/org/traccar/events/MaintenanceEventHandler.java b/src/org/traccar/events/MaintenanceEventHandler.java
index 86abf7c17..4a6122826 100644
--- a/src/org/traccar/events/MaintenanceEventHandler.java
+++ b/src/org/traccar/events/MaintenanceEventHandler.java
@@ -1,6 +1,6 @@
 /*
- * Copyright 2016 Anton Tananaev (anton@traccar.org)
- * Copyright 2016 Andrey Kunitsyn (andrey@traccar.org)
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2018 Andrey Kunitsyn (andrey@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,54 +16,47 @@
  */
 package org.traccar.events;
 
-import java.util.Collections;
+import java.util.HashMap;
 import java.util.Map;
 
 import org.traccar.BaseEventHandler;
 import org.traccar.Context;
-import org.traccar.model.Device;
 import org.traccar.model.Event;
+import org.traccar.model.Maintenance;
 import org.traccar.model.Position;
 
 public class MaintenanceEventHandler extends BaseEventHandler {
 
-    public static final String ATTRIBUTE_MAINTENANCE_START = "maintenance.start";
-    public static final String ATTRIBUTE_MAINTENANCE_INTERVAL = "maintenance.interval";
-
     @Override
     protected Map<Event, Position> analyzePosition(Position position) {
-        Device device = Context.getIdentityManager().getById(position.getDeviceId());
-        if (device == null || !Context.getIdentityManager().isLatestPosition(position)) {
-            return null;
-        }
-
-        double maintenanceInterval = Context.getDeviceManager()
-                .lookupAttributeDouble(device.getId(), ATTRIBUTE_MAINTENANCE_INTERVAL, 0, false);
-        if (maintenanceInterval == 0) {
+        if (Context.getIdentityManager().getById(position.getDeviceId()) == null
+                || !Context.getIdentityManager().isLatestPosition(position)) {
             return null;
         }
-        double maintenanceStart = Context.getDeviceManager()
-                .lookupAttributeDouble(device.getId(), ATTRIBUTE_MAINTENANCE_START, 0, false);
-
-        double oldTotalDistance = 0.0;
-        double newTotalDistance = 0.0;
 
         Position lastPosition = Context.getIdentityManager().getLastPosition(position.getDeviceId());
-        if (lastPosition != null) {
-            oldTotalDistance = lastPosition.getDouble(Position.KEY_TOTAL_DISTANCE);
+        if (lastPosition == null) {
+            return null;
         }
-        newTotalDistance = position.getDouble(Position.KEY_TOTAL_DISTANCE);
-
-        oldTotalDistance -= maintenanceStart;
-        newTotalDistance -= maintenanceStart;
 
-        if ((long) (oldTotalDistance / maintenanceInterval) < (long) (newTotalDistance / maintenanceInterval)) {
-            Event event = new Event(Event.TYPE_MAINTENANCE, position.getDeviceId(), position.getId());
-            event.set(Position.KEY_TOTAL_DISTANCE, newTotalDistance);
-            return Collections.singletonMap(event, position);
+        Map<Event, Position> events = new HashMap<>();
+        for (long maintenanceId : Context.getMaintenancesManager().getAllDeviceItems(position.getDeviceId())) {
+            Maintenance maintenance = Context.getMaintenancesManager().getById(maintenanceId);
+            if (maintenance.getPeriod() != 0) {
+                double oldValue = lastPosition.getDouble(maintenance.getType());
+                double newValue = position.getDouble(maintenance.getType());
+                if (oldValue != 0.0 && newValue != 0.0
+                        && (long) ((oldValue - maintenance.getStart()) / maintenance.getPeriod())
+                        < (long) ((newValue - maintenance.getStart()) / maintenance.getPeriod())) {
+                    Event event = new Event(Event.TYPE_MAINTENANCE, position.getDeviceId(), position.getId());
+                    event.setMaintenanceId(maintenanceId);
+                    event.set(maintenance.getType(), newValue);
+                    events.put(event, position);
+                }
+            }
         }
 
-        return null;
+        return events;
     }
 
 }
diff --git a/src/org/traccar/geocoder/Address.java b/src/org/traccar/geocoder/Address.java
index d542d1b19..fe39da8e1 100644
--- a/src/org/traccar/geocoder/Address.java
+++ b/src/org/traccar/geocoder/Address.java
@@ -97,4 +97,14 @@ public class Address {
         this.house = house;
     }
 
+    private String formattedAddress;
+
+    public String getFormattedAddress() {
+        return formattedAddress;
+    }
+
+    public void setFormattedAddress(String formattedAddress) {
+        this.formattedAddress = formattedAddress;
+    }
+
 }
diff --git a/src/org/traccar/geocoder/AddressFormat.java b/src/org/traccar/geocoder/AddressFormat.java
index 0800d6dcc..220f268f1 100644
--- a/src/org/traccar/geocoder/AddressFormat.java
+++ b/src/org/traccar/geocoder/AddressFormat.java
@@ -66,6 +66,7 @@ public class AddressFormat extends Format {
         result = replace(result, "%u", address.getSuburb());
         result = replace(result, "%r", address.getStreet());
         result = replace(result, "%h", address.getHouse());
+        result = replace(result, "%f", address.getFormattedAddress());
 
         result = result.replaceAll("^[, ]*", "");
 
diff --git a/src/org/traccar/geocoder/BingMapsGeocoder.java b/src/org/traccar/geocoder/BingMapsGeocoder.java
index fbfb5394a..32a26ee0c 100644
--- a/src/org/traccar/geocoder/BingMapsGeocoder.java
+++ b/src/org/traccar/geocoder/BingMapsGeocoder.java
@@ -51,6 +51,9 @@ public class BingMapsGeocoder extends JsonGeocoder {
                 if (location.containsKey("postalCode")) {
                     address.setPostcode(location.getString("postalCode"));
                 }
+                if (location.containsKey("formattedAddress")) {
+                    address.setFormattedAddress(location.getString("formattedAddress"));
+                }
                 return address;
             }
         }
diff --git a/src/org/traccar/geocoder/GeocodeFarmGeocoder.java b/src/org/traccar/geocoder/GeocodeFarmGeocoder.java
index 4fb956af9..39a3300a0 100644
--- a/src/org/traccar/geocoder/GeocodeFarmGeocoder.java
+++ b/src/org/traccar/geocoder/GeocodeFarmGeocoder.java
@@ -41,23 +41,27 @@ public class GeocodeFarmGeocoder extends JsonGeocoder {
         JsonObject result = json
                 .getJsonObject("geocoding_results")
                 .getJsonArray("RESULTS")
-                .getJsonObject(0)
-                .getJsonObject("ADDRESS");
+                .getJsonObject(0);
 
-        if (result.containsKey("street_number")) {
-            address.setStreet(result.getString("street_number"));
+        JsonObject resultAddress = result.getJsonObject("ADDRESS");
+
+        if (result.containsKey("formatted_address")) {
+            address.setFormattedAddress(result.getString("formatted_address"));
+        }
+        if (resultAddress.containsKey("street_number")) {
+            address.setStreet(resultAddress.getString("street_number"));
         }
-        if (result.containsKey("street_name")) {
-            address.setStreet(result.getString("street_name"));
+        if (resultAddress.containsKey("street_name")) {
+            address.setStreet(resultAddress.getString("street_name"));
         }
-        if (result.containsKey("locality")) {
-            address.setSettlement(result.getString("locality"));
+        if (resultAddress.containsKey("locality")) {
+            address.setSettlement(resultAddress.getString("locality"));
         }
-        if (result.containsKey("admin_1")) {
-            address.setState(result.getString("admin_1"));
+        if (resultAddress.containsKey("admin_1")) {
+            address.setState(resultAddress.getString("admin_1"));
         }
-        if (result.containsKey("country")) {
-            address.setCountry(result.getString("country"));
+        if (resultAddress.containsKey("country")) {
+            address.setCountry(resultAddress.getString("country"));
         }
 
         return address;
diff --git a/src/org/traccar/geocoder/GisgraphyGeocoder.java b/src/org/traccar/geocoder/GisgraphyGeocoder.java
index a0c831966..3a173f985 100644
--- a/src/org/traccar/geocoder/GisgraphyGeocoder.java
+++ b/src/org/traccar/geocoder/GisgraphyGeocoder.java
@@ -45,6 +45,9 @@ public class GisgraphyGeocoder extends JsonGeocoder {
         if (result.containsKey("countryCode")) {
             address.setCountry(result.getString("countryCode"));
         }
+        if (result.containsKey("formatedFull")) {
+            address.setFormattedAddress(result.getString("formatedFull"));
+        }
 
         return address;
     }
diff --git a/src/org/traccar/geocoder/GoogleGeocoder.java b/src/org/traccar/geocoder/GoogleGeocoder.java
index 235ea9ea9..af9b58a90 100644
--- a/src/org/traccar/geocoder/GoogleGeocoder.java
+++ b/src/org/traccar/geocoder/GoogleGeocoder.java
@@ -46,6 +46,10 @@ public class GoogleGeocoder extends JsonGeocoder {
             JsonObject result = (JsonObject) results.get(0);
             JsonArray components = result.getJsonArray("address_components");
 
+            if (result.containsKey("formatted_address")) {
+                address.setFormattedAddress(result.getString("formatted_address"));
+            }
+
             for (JsonObject component : components.getValuesAs(JsonObject.class)) {
 
                 String value = component.getString("short_name");
diff --git a/src/org/traccar/geocoder/NominatimGeocoder.java b/src/org/traccar/geocoder/NominatimGeocoder.java
index 75d2e9f99..c0142ae27 100644
--- a/src/org/traccar/geocoder/NominatimGeocoder.java
+++ b/src/org/traccar/geocoder/NominatimGeocoder.java
@@ -44,6 +44,10 @@ public class NominatimGeocoder extends JsonGeocoder {
         if (result != null) {
             Address address = new Address();
 
+            if (json.containsKey("display_name")) {
+                address.setFormattedAddress(json.getString("display_name"));
+            }
+
             if (result.containsKey("house_number")) {
                 address.setHouse(result.getString("house_number"));
             }
diff --git a/src/org/traccar/geocoder/OpenCageGeocoder.java b/src/org/traccar/geocoder/OpenCageGeocoder.java
index 894397ee3..c21d5562a 100644
--- a/src/org/traccar/geocoder/OpenCageGeocoder.java
+++ b/src/org/traccar/geocoder/OpenCageGeocoder.java
@@ -33,6 +33,9 @@ public class OpenCageGeocoder extends JsonGeocoder {
             if (location != null) {
                 Address address = new Address();
 
+                if (result.getJsonObject(0).containsKey("formatted")) {
+                    address.setFormattedAddress(result.getJsonObject(0).getString("formatted"));
+                }
                 if (location.containsKey("building")) {
                     address.setHouse(location.getString("building"));
                 }
diff --git a/src/org/traccar/geofence/GeofenceCircle.java b/src/org/traccar/geofence/GeofenceCircle.java
index d78734714..f6fca63ca 100644
--- a/src/org/traccar/geofence/GeofenceCircle.java
+++ b/src/org/traccar/geofence/GeofenceCircle.java
@@ -39,9 +39,13 @@ public class GeofenceCircle extends GeofenceGeometry {
         this.radius = radius;
     }
 
+    public double distanceFromCenter(double latitude, double longitude) {
+        return DistanceCalculator.distance(centerLatitude, centerLongitude, latitude, longitude);
+    }
+
     @Override
     public boolean containsPoint(double latitude, double longitude) {
-        return DistanceCalculator.distance(centerLatitude, centerLongitude, latitude, longitude) <= radius;
+        return distanceFromCenter(latitude, longitude) <= radius;
     }
 
     @Override
diff --git a/src/org/traccar/helper/Checksum.java b/src/org/traccar/helper/Checksum.java
index 43ba6a689..5aed84bf8 100644
--- a/src/org/traccar/helper/Checksum.java
+++ b/src/org/traccar/helper/Checksum.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 - 2015 Anton Tananaev (anton@traccar.org)
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,163 +24,109 @@ public final class Checksum {
     private Checksum() {
     }
 
-    private static final int[] CRC16_CCITT_TABLE_REVERSE = {
-        0x0000, 0x1189, 0x2312, 0x329B, 0x4624, 0x57AD, 0x6536, 0x74BF,
-        0x8C48, 0x9DC1, 0xAF5A, 0xBED3, 0xCA6C, 0xDBE5, 0xE97E, 0xF8F7,
-        0x1081, 0x0108, 0x3393, 0x221A, 0x56A5, 0x472C, 0x75B7, 0x643E,
-        0x9CC9, 0x8D40, 0xBFDB, 0xAE52, 0xDAED, 0xCB64, 0xF9FF, 0xE876,
-        0x2102, 0x308B, 0x0210, 0x1399, 0x6726, 0x76AF, 0x4434, 0x55BD,
-        0xAD4A, 0xBCC3, 0x8E58, 0x9FD1, 0xEB6E, 0xFAE7, 0xC87C, 0xD9F5,
-        0x3183, 0x200A, 0x1291, 0x0318, 0x77A7, 0x662E, 0x54B5, 0x453C,
-        0xBDCB, 0xAC42, 0x9ED9, 0x8F50, 0xFBEF, 0xEA66, 0xD8FD, 0xC974,
-        0x4204, 0x538D, 0x6116, 0x709F, 0x0420, 0x15A9, 0x2732, 0x36BB,
-        0xCE4C, 0xDFC5, 0xED5E, 0xFCD7, 0x8868, 0x99E1, 0xAB7A, 0xBAF3,
-        0x5285, 0x430C, 0x7197, 0x601E, 0x14A1, 0x0528, 0x37B3, 0x263A,
-        0xDECD, 0xCF44, 0xFDDF, 0xEC56, 0x98E9, 0x8960, 0xBBFB, 0xAA72,
-        0x6306, 0x728F, 0x4014, 0x519D, 0x2522, 0x34AB, 0x0630, 0x17B9,
-        0xEF4E, 0xFEC7, 0xCC5C, 0xDDD5, 0xA96A, 0xB8E3, 0x8A78, 0x9BF1,
-        0x7387, 0x620E, 0x5095, 0x411C, 0x35A3, 0x242A, 0x16B1, 0x0738,
-        0xFFCF, 0xEE46, 0xDCDD, 0xCD54, 0xB9EB, 0xA862, 0x9AF9, 0x8B70,
-        0x8408, 0x9581, 0xA71A, 0xB693, 0xC22C, 0xD3A5, 0xE13E, 0xF0B7,
-        0x0840, 0x19C9, 0x2B52, 0x3ADB, 0x4E64, 0x5FED, 0x6D76, 0x7CFF,
-        0x9489, 0x8500, 0xB79B, 0xA612, 0xD2AD, 0xC324, 0xF1BF, 0xE036,
-        0x18C1, 0x0948, 0x3BD3, 0x2A5A, 0x5EE5, 0x4F6C, 0x7DF7, 0x6C7E,
-        0xA50A, 0xB483, 0x8618, 0x9791, 0xE32E, 0xF2A7, 0xC03C, 0xD1B5,
-        0x2942, 0x38CB, 0x0A50, 0x1BD9, 0x6F66, 0x7EEF, 0x4C74, 0x5DFD,
-        0xB58B, 0xA402, 0x9699, 0x8710, 0xF3AF, 0xE226, 0xD0BD, 0xC134,
-        0x39C3, 0x284A, 0x1AD1, 0x0B58, 0x7FE7, 0x6E6E, 0x5CF5, 0x4D7C,
-        0xC60C, 0xD785, 0xE51E, 0xF497, 0x8028, 0x91A1, 0xA33A, 0xB2B3,
-        0x4A44, 0x5BCD, 0x6956, 0x78DF, 0x0C60, 0x1DE9, 0x2F72, 0x3EFB,
-        0xD68D, 0xC704, 0xF59F, 0xE416, 0x90A9, 0x8120, 0xB3BB, 0xA232,
-        0x5AC5, 0x4B4C, 0x79D7, 0x685E, 0x1CE1, 0x0D68, 0x3FF3, 0x2E7A,
-        0xE70E, 0xF687, 0xC41C, 0xD595, 0xA12A, 0xB0A3, 0x8238, 0x93B1,
-        0x6B46, 0x7ACF, 0x4854, 0x59DD, 0x2D62, 0x3CEB, 0x0E70, 0x1FF9,
-        0xF78F, 0xE606, 0xD49D, 0xC514, 0xB1AB, 0xA022, 0x92B9, 0x8330,
-        0x7BC7, 0x6A4E, 0x58D5, 0x495C, 0x3DE3, 0x2C6A, 0x1EF1, 0x0F78
-    };
-
-    private static final int[] CRC16_CCITT_TABLE = {
-        0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
-        0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
-        0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
-        0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
-        0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
-        0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
-        0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
-        0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
-        0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
-        0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
-        0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
-        0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
-        0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
-        0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
-        0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
-        0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
-        0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
-        0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
-        0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
-        0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
-        0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
-        0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
-        0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
-        0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
-        0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
-        0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
-        0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
-        0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
-        0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
-        0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
-        0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
-        0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
-    };
-
-    private static final int[] CRC16_IBM_TABLE = {
-        0x0000, 0xc0c1, 0xc181, 0x0140, 0xc301, 0x03c0, 0x0280, 0xc241,
-        0xc601, 0x06c0, 0x0780, 0xc741, 0x0500, 0xc5c1, 0xc481, 0x0440,
-        0xcc01, 0x0cc0, 0x0d80, 0xcd41, 0x0f00, 0xcfc1, 0xce81, 0x0e40,
-        0x0a00, 0xcac1, 0xcb81, 0x0b40, 0xc901, 0x09c0, 0x0880, 0xc841,
-        0xd801, 0x18c0, 0x1980, 0xd941, 0x1b00, 0xdbc1, 0xda81, 0x1a40,
-        0x1e00, 0xdec1, 0xdf81, 0x1f40, 0xdd01, 0x1dc0, 0x1c80, 0xdc41,
-        0x1400, 0xd4c1, 0xd581, 0x1540, 0xd701, 0x17c0, 0x1680, 0xd641,
-        0xd201, 0x12c0, 0x1380, 0xd341, 0x1100, 0xd1c1, 0xd081, 0x1040,
-        0xf001, 0x30c0, 0x3180, 0xf141, 0x3300, 0xf3c1, 0xf281, 0x3240,
-        0x3600, 0xf6c1, 0xf781, 0x3740, 0xf501, 0x35c0, 0x3480, 0xf441,
-        0x3c00, 0xfcc1, 0xfd81, 0x3d40, 0xff01, 0x3fc0, 0x3e80, 0xfe41,
-        0xfa01, 0x3ac0, 0x3b80, 0xfb41, 0x3900, 0xf9c1, 0xf881, 0x3840,
-        0x2800, 0xe8c1, 0xe981, 0x2940, 0xeb01, 0x2bc0, 0x2a80, 0xea41,
-        0xee01, 0x2ec0, 0x2f80, 0xef41, 0x2d00, 0xedc1, 0xec81, 0x2c40,
-        0xe401, 0x24c0, 0x2580, 0xe541, 0x2700, 0xe7c1, 0xe681, 0x2640,
-        0x2200, 0xe2c1, 0xe381, 0x2340, 0xe101, 0x21c0, 0x2080, 0xe041,
-        0xa001, 0x60c0, 0x6180, 0xa141, 0x6300, 0xa3c1, 0xa281, 0x6240,
-        0x6600, 0xa6c1, 0xa781, 0x6740, 0xa501, 0x65c0, 0x6480, 0xa441,
-        0x6c00, 0xacc1, 0xad81, 0x6d40, 0xaf01, 0x6fc0, 0x6e80, 0xae41,
-        0xaa01, 0x6ac0, 0x6b80, 0xab41, 0x6900, 0xa9c1, 0xa881, 0x6840,
-        0x7800, 0xb8c1, 0xb981, 0x7940, 0xbb01, 0x7bc0, 0x7a80, 0xba41,
-        0xbe01, 0x7ec0, 0x7f80, 0xbf41, 0x7d00, 0xbdc1, 0xbc81, 0x7c40,
-        0xb401, 0x74c0, 0x7580, 0xb541, 0x7700, 0xb7c1, 0xb681, 0x7640,
-        0x7200, 0xb2c1, 0xb381, 0x7340, 0xb101, 0x71c0, 0x7080, 0xb041,
-        0x5000, 0x90c1, 0x9181, 0x5140, 0x9301, 0x53c0, 0x5280, 0x9241,
-        0x9601, 0x56c0, 0x5780, 0x9741, 0x5500, 0x95c1, 0x9481, 0x5440,
-        0x9c01, 0x5cc0, 0x5d80, 0x9d41, 0x5f00, 0x9fc1, 0x9e81, 0x5e40,
-        0x5a00, 0x9ac1, 0x9b81, 0x5b40, 0x9901, 0x59c0, 0x5880, 0x9841,
-        0x8801, 0x48c0, 0x4980, 0x8941, 0x4b00, 0x8bc1, 0x8a81, 0x4a40,
-        0x4e00, 0x8ec1, 0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41,
-        0x4400, 0x84c1, 0x8581, 0x4540, 0x8701, 0x47c0, 0x4680, 0x8641,
-        0x8201, 0x42c0, 0x4380, 0x8341, 0x4100, 0x81c1, 0x8081, 0x4040,
-    };
-
-    // More info: http://reveng.sourceforge.net/crc-catalogue/16.htm
-    public static final String CRC16_IBM = "IBM";
-    public static final String CRC16_MODBUS = "MODBUS";
-    public static final String CRC16_X25 = "X-25";
-    public static final String CRC16_CCITT_FALSE = "CCITT-FALSE";
-    public static final String CRC16_KERMIT = "KERMIT";
-    public static final String CRC16_XMODEM = "XMODEM";
-    public static final String CRC16_AUG_CCITT = "AUG-CCITT";
-    public static final String CRC16_GENIBUS = "GENIBUS";
-    public static final String CRC16_MCRF4XX = "MCRF4XX";
-
-    private static int crc16Unreflected(ByteBuffer buf, int crcIn, int[] table) {
-        int crc16 = crcIn;
-        while (buf.hasRemaining()) {
-            crc16 = table[((crc16 >> 8) ^ buf.get()) & 0xff] ^ (crc16 << 8);
+    public static class Algorithm {
+
+        private int poly;
+        private int init;
+        private boolean refIn;
+        private boolean refOut;
+        private int xorOut;
+        private int[] table;
+
+        public Algorithm(int bits, int poly, int init, boolean refIn, boolean refOut, int xorOut) {
+            this.poly = poly;
+            this.init = init;
+            this.refIn = refIn;
+            this.refOut = refOut;
+            this.xorOut = xorOut;
+            this.table = bits == 8 ? initTable8() : initTable16();
+        }
+
+        private int[] initTable8() {
+            int[] table = new int[256];
+            int crc;
+            for (int i = 0; i < 256; i++) {
+                crc = i;
+                for (int j = 0; j < 8; j++) {
+                    boolean bit = (crc & 0x80) != 0;
+                    crc <<= 1;
+                    if (bit) {
+                        crc ^= poly;
+                    }
+                }
+                table[i] = crc & 0xFF;
+            }
+            return table;
+        }
+
+        private int[] initTable16() {
+            int[] table = new int[256];
+            int crc;
+            for (int i = 0; i < 256; i++) {
+                crc = i << 8;
+                for (int j = 0; j < 8; j++) {
+                    boolean bit = (crc & 0x8000) != 0;
+                    crc <<= 1;
+                    if (bit) {
+                        crc ^= poly;
+                    }
+                }
+                table[i] = crc & 0xFFFF;
+            }
+            return table;
+        }
+
+    }
+
+    private static int reverse(int value, int bits) {
+        int result = 0;
+        for (int i = 0; i < bits; i++) {
+            result = (result << 1) | (value & 1);
+            value >>= 1;
         }
-        return crc16 & 0xFFFF;
+        return result;
     }
 
-    private static int crc16Reflected(ByteBuffer buf, int crcIn, int[] table) {
-        int crc16 = crcIn;
+    public static int crc8(Algorithm algorithm, ByteBuffer buf) {
+        int crc = algorithm.init;
         while (buf.hasRemaining()) {
-            crc16 = table[(crc16 ^ buf.get()) & 0xff] ^ (crc16 >> 8);
+            int b = buf.get() & 0xFF;
+            if (algorithm.refIn) {
+                b = reverse(b, 8);
+            }
+            crc = algorithm.table[(crc & 0xFF) ^ b];
+        }
+        if (algorithm.refOut) {
+            crc = reverse(crc, 8);
         }
-        return crc16 & 0xFFFF;
+        return (crc ^ algorithm.xorOut) & 0xFF;
     }
 
-    public static int crc16(String type, ByteBuffer buf) {
-        switch (type) {
-            case CRC16_IBM:
-                return crc16Reflected(buf, 0, CRC16_IBM_TABLE);
-            case CRC16_MODBUS:
-                return crc16Reflected(buf, 0xFFFF, CRC16_IBM_TABLE);
-            case CRC16_X25:
-                return crc16Reflected(buf, 0xFFFF, CRC16_CCITT_TABLE_REVERSE) ^ 0xFFFF;
-            case CRC16_CCITT_FALSE:
-                return crc16Unreflected(buf, 0xFFFF, CRC16_CCITT_TABLE);
-            case CRC16_KERMIT:
-                return crc16Reflected(buf, 0, CRC16_CCITT_TABLE_REVERSE);
-            case CRC16_XMODEM:
-                return crc16Unreflected(buf, 0, CRC16_CCITT_TABLE);
-            case CRC16_AUG_CCITT:
-                return crc16Unreflected(buf, 0x1d0f, CRC16_CCITT_TABLE);
-            case CRC16_GENIBUS:
-                return crc16Unreflected(buf, 0xFFFF, CRC16_CCITT_TABLE) ^ 0xFFFF;
-            case CRC16_MCRF4XX:
-                return crc16Reflected(buf, 0xFFFF, CRC16_CCITT_TABLE_REVERSE);
-            default:
-                throw new UnsupportedOperationException(type);
+    public static int crc16(Algorithm algorithm, ByteBuffer buf) {
+        int crc = algorithm.init;
+        while (buf.hasRemaining()) {
+            int b = buf.get() & 0xFF;
+            if (algorithm.refIn) {
+                b = reverse(b, 8);
+            }
+            crc = (crc << 8) ^ algorithm.table[((crc >> 8) & 0xFF) ^ b];
+        }
+        if (algorithm.refOut) {
+            crc = reverse(crc, 16);
         }
+        return (crc ^ algorithm.xorOut) & 0xFFFF;
     }
 
+    public static final Algorithm CRC8_EGTS = new Algorithm(8, 0x31, 0xFF, false, false, 0x00);
+    public static final Algorithm CRC8_ROHC = new Algorithm(8, 0x07, 0xFF, true, true, 0x00);
+
+    public static final Algorithm CRC16_IBM = new Algorithm(16, 0x8005, 0x0000, true, true, 0x0000);
+    public static final Algorithm CRC16_X25 = new Algorithm(16, 0x1021, 0xFFFF, true, true, 0xFFFF);
+    public static final Algorithm CRC16_MODBUS = new Algorithm(16, 0x8005, 0xFFFF, true, true, 0x0000);
+    public static final Algorithm CRC16_CCITT_FALSE = new Algorithm(16, 0x1021, 0xFFFF, false, false, 0x0000);
+    public static final Algorithm CRC16_KERMIT = new Algorithm(16, 0x1021, 0x0000, true, true, 0x0000);
+    public static final Algorithm CRC16_XMODEM = new Algorithm(16, 0x1021, 0x0000, false, false, 0x0000);
+
     public static int crc32(ByteBuffer buf) {
         CRC32 checksum = new CRC32();
         while (buf.hasRemaining()) {
diff --git a/src/org/traccar/helper/DataConverter.java b/src/org/traccar/helper/DataConverter.java
new file mode 100644
index 000000000..7abd4ae93
--- /dev/null
+++ b/src/org/traccar/helper/DataConverter.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.helper;
+
+import org.apache.commons.codec.DecoderException;
+import org.apache.commons.codec.binary.Base64;
+import org.apache.commons.codec.binary.Hex;
+
+public final class DataConverter {
+
+    private DataConverter() {
+    }
+
+    public static byte[] parseHex(String string) {
+        try {
+            return Hex.decodeHex(string);
+        } catch (DecoderException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static String printHex(byte[] data) {
+        return Hex.encodeHexString(data);
+    }
+
+    public static byte[] parseBase64(String string) {
+        return Base64.decodeBase64(string);
+    }
+
+    public static String printBase64(byte[] data) {
+        return Base64.encodeBase64String(data);
+    }
+
+}
diff --git a/src/org/traccar/helper/Hashing.java b/src/org/traccar/helper/Hashing.java
index 3fcc124fa..e91310eda 100644
--- a/src/org/traccar/helper/Hashing.java
+++ b/src/org/traccar/helper/Hashing.java
@@ -17,7 +17,6 @@ package org.traccar.helper;
 
 import javax.crypto.SecretKeyFactory;
 import javax.crypto.spec.PBEKeySpec;
-import javax.xml.bind.DatatypeConverter;
 import java.security.NoSuchAlgorithmException;
 import java.security.SecureRandom;
 import java.security.spec.InvalidKeySpecException;
@@ -75,13 +74,13 @@ public final class Hashing {
         RANDOM.nextBytes(salt);
         byte[] hash = function(password.toCharArray(), salt);
         return new HashingResult(
-                DatatypeConverter.printHexBinary(hash),
-                DatatypeConverter.printHexBinary(salt));
+                DataConverter.printHex(hash),
+                DataConverter.printHex(salt));
     }
 
     public static boolean validatePassword(String password, String hashHex, String saltHex) {
-        byte[] hash = DatatypeConverter.parseHexBinary(hashHex);
-        byte[] salt = DatatypeConverter.parseHexBinary(saltHex);
+        byte[] hash = DataConverter.parseHex(hashHex);
+        byte[] salt = DataConverter.parseHex(saltHex);
         return slowEquals(hash, function(password.toCharArray(), salt));
     }
 
diff --git a/src/org/traccar/helper/ObdDecoder.java b/src/org/traccar/helper/ObdDecoder.java
index 4bc3bcdfb..1bdcce352 100644
--- a/src/org/traccar/helper/ObdDecoder.java
+++ b/src/org/traccar/helper/ObdDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -29,15 +29,6 @@ public final class ObdDecoder {
     private static final int MODE_FREEZE_FRAME = 0x02;
     private static final int MODE_CODES = 0x03;
 
-    private static final int PID_ENGINE_LOAD = 0x04;
-    private static final int PID_COOLANT_TEMPERATURE = 0x05;
-    private static final int PID_ENGINE_RPM = 0x0C;
-    private static final int PID_VEHICLE_SPEED = 0x0D;
-    private static final int PID_THROTTLE_POSITION = 0x11;
-    private static final int PID_MIL_DISTANCE = 0x21;
-    private static final int PID_FUEL_LEVEL = 0x2F;
-    private static final int PID_DISTANCE_CLEARED = 0x31;
-
     public static Map.Entry<String, Object> decode(int mode, String value) {
         switch (mode) {
             case MODE_CURRENT:
@@ -86,21 +77,25 @@ public final class ObdDecoder {
 
     public static Map.Entry<String, Object> decodeData(int pid, int value, boolean convert) {
         switch (pid) {
-            case PID_ENGINE_LOAD:
+            case 0x04:
                 return createEntry(Position.KEY_ENGINE_LOAD, convert ? value * 100 / 255 : value);
-            case PID_COOLANT_TEMPERATURE:
+            case 0x05:
                 return createEntry(Position.KEY_COOLANT_TEMP, convert ? value - 40 : value);
-            case PID_ENGINE_RPM:
+            case 0x0B:
+                return createEntry("mapIntake", value);
+            case 0x0C:
                 return createEntry(Position.KEY_RPM, convert ? value / 4 : value);
-            case PID_VEHICLE_SPEED:
+            case 0x0D:
                 return createEntry(Position.KEY_OBD_SPEED, value);
-            case PID_THROTTLE_POSITION:
+            case 0x0F:
+                return createEntry("intakeTemp", convert ? value - 40 : value);
+            case 0x11:
                 return createEntry(Position.KEY_THROTTLE, convert ? value * 100 / 255 : value);
-            case PID_MIL_DISTANCE:
+            case 0x21:
                 return createEntry("milDistance", value);
-            case PID_FUEL_LEVEL:
+            case 0x2F:
                 return createEntry(Position.KEY_FUEL_LEVEL, convert ? value * 100 / 255 : value);
-            case PID_DISTANCE_CLEARED:
+            case 0x31:
                 return createEntry("clearedDistance", value);
             default:
                 return null;
diff --git a/src/org/traccar/model/Device.java b/src/org/traccar/model/Device.java
index 51b479b09..0c9be932d 100644
--- a/src/org/traccar/model/Device.java
+++ b/src/org/traccar/model/Device.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,7 +21,7 @@ import java.util.List;
 import org.traccar.database.QueryExtended;
 import org.traccar.database.QueryIgnore;
 
-public class Device extends ExtendedModel {
+public class Device extends GroupedModel {
 
     private String name;
 
@@ -88,16 +88,6 @@ public class Device extends ExtendedModel {
         this.positionId = positionId;
     }
 
-    private long groupId;
-
-    public long getGroupId() {
-        return groupId;
-    }
-
-    public void setGroupId(long groupId) {
-        this.groupId = groupId;
-    }
-
     private List<Long> geofenceIds;
 
     @QueryIgnore
diff --git a/src/org/traccar/model/Event.java b/src/org/traccar/model/Event.java
index 47b60af01..ee7fcc679 100644
--- a/src/org/traccar/model/Event.java
+++ b/src/org/traccar/model/Event.java
@@ -64,19 +64,11 @@ public class Event extends Message {
     private Date serverTime;
 
     public Date getServerTime() {
-        if (serverTime != null) {
-            return new Date(serverTime.getTime());
-        } else {
-            return null;
-        }
+        return serverTime;
     }
 
     public void setServerTime(Date serverTime) {
-        if (serverTime != null) {
-            this.serverTime = new Date(serverTime.getTime());
-        } else {
-            this.serverTime = null;
-        }
+        this.serverTime = serverTime;
     }
 
     private long positionId;
@@ -99,4 +91,14 @@ public class Event extends Message {
         this.geofenceId = geofenceId;
     }
 
+    private long maintenanceId = 0;
+
+    public long getMaintenanceId() {
+        return maintenanceId;
+    }
+
+    public void setMaintenanceId(long maintenanceId) {
+        this.maintenanceId = maintenanceId;
+    }
+
 }
diff --git a/src/org/traccar/model/Geofence.java b/src/org/traccar/model/Geofence.java
index 21c196da9..8560d22e9 100644
--- a/src/org/traccar/model/Geofence.java
+++ b/src/org/traccar/model/Geofence.java
@@ -26,7 +26,7 @@ import org.traccar.geofence.GeofencePolyline;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
 
-public class Geofence extends ExtendedModel {
+public class Geofence extends ScheduledModel {
 
     public static final String TYPE_GEOFENCE_CILCLE = "geofenceCircle";
     public static final String TYPE_GEOFENCE_POLYGON = "geofencePolygon";
@@ -65,7 +65,9 @@ public class Geofence extends ExtendedModel {
         } else if (area.startsWith("POLYGON")) {
             geometry = new GeofencePolygon(area);
         } else if (area.startsWith("LINESTRING")) {
-            geometry = new GeofencePolyline(area, Context.getConfig().getDouble("geofence.polylineDistance", 25));
+            final double distance = getDouble("polylineDistance");
+            geometry = new GeofencePolyline(area, distance > 0 ? distance
+                    : Context.getConfig().getDouble("geofence.polylineDistance", 25));
         } else {
             throw new ParseException("Unknown geometry type", 0);
         }
@@ -87,14 +89,4 @@ public class Geofence extends ExtendedModel {
         area = geometry.toWkt();
         this.geometry = geometry;
     }
-
-    private long calendarId;
-
-    public long getCalendarId() {
-        return calendarId;
-    }
-
-    public void setCalendarId(long calendarId) {
-        this.calendarId = calendarId;
-    }
 }
diff --git a/src/org/traccar/model/Group.java b/src/org/traccar/model/Group.java
index aad206aad..91ea2319d 100644
--- a/src/org/traccar/model/Group.java
+++ b/src/org/traccar/model/Group.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,7 +15,7 @@
  */
 package org.traccar.model;
 
-public class Group extends ExtendedModel {
+public class Group extends GroupedModel {
 
     private String name;
 
@@ -27,14 +27,4 @@ public class Group extends ExtendedModel {
         this.name = name;
     }
 
-    private long groupId;
-
-    public long getGroupId() {
-        return groupId;
-    }
-
-    public void setGroupId(long groupId) {
-        this.groupId = groupId;
-    }
-
 }
diff --git a/src/org/traccar/model/GroupedModel.java b/src/org/traccar/model/GroupedModel.java
new file mode 100644
index 000000000..6b1aa75b1
--- /dev/null
+++ b/src/org/traccar/model/GroupedModel.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2018 Andrey Kunitsyn (andrey@traccar.org)
+ *
+ * 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.model;
+
+public class GroupedModel extends ExtendedModel {
+
+    private long groupId;
+
+    public long getGroupId() {
+        return groupId;
+    }
+
+    public void setGroupId(long groupId) {
+        this.groupId = groupId;
+    }
+
+}
diff --git a/src/org/traccar/model/Maintenance.java b/src/org/traccar/model/Maintenance.java
new file mode 100644
index 000000000..73f67ea96
--- /dev/null
+++ b/src/org/traccar/model/Maintenance.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2018 Andrey Kunitsyn (andrey@traccar.org)
+ *
+ * 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.model;
+
+public class Maintenance extends ExtendedModel {
+
+    private String name;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    private String type;
+
+    public String getType() {
+        return type;
+    }
+
+    public void setType(String type) {
+        this.type = type;
+    }
+
+    private double start;
+
+    public double getStart() {
+        return start;
+    }
+
+    public void setStart(double start) {
+        this.start = start;
+    }
+
+    private double period;
+
+    public double getPeriod() {
+        return period;
+    }
+
+    public void setPeriod(double period) {
+        this.period = period;
+    }
+
+}
diff --git a/src/org/traccar/model/Notification.java b/src/org/traccar/model/Notification.java
index 9d6034fff..cc80f2ae2 100644
--- a/src/org/traccar/model/Notification.java
+++ b/src/org/traccar/model/Notification.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,7 +15,7 @@
  */
 package org.traccar.model;
 
-public class Notification extends ExtendedModel {
+public class Notification extends ScheduledModel {
 
     private boolean always;
 
diff --git a/src/org/traccar/model/Position.java b/src/org/traccar/model/Position.java
index 4f78867c2..fca0f16e3 100644
--- a/src/org/traccar/model/Position.java
+++ b/src/org/traccar/model/Position.java
@@ -58,6 +58,7 @@ public class Position extends Message {
     public static final String KEY_TYPE = "type";
     public static final String KEY_IGNITION = "ignition";
     public static final String KEY_FLAGS = "flags";
+    public static final String KEY_ANTENNA = "antenna";
     public static final String KEY_CHARGE = "charge";
     public static final String KEY_IP = "ip";
     public static final String KEY_ARCHIVE = "archive";
@@ -115,6 +116,7 @@ public class Position extends Message {
     public static final String ALARM_GPS_ANTENNA_CUT = "gpsAntennaCut";
     public static final String ALARM_ACCIDENT = "accident";
     public static final String ALARM_TOW = "tow";
+    public static final String ALARM_IDLE = "idle";
     public static final String ALARM_ACCELERATION = "hardAcceleration";
     public static final String ALARM_BRAKING = "hardBraking";
     public static final String ALARM_CORNERING = "hardCornering";
@@ -131,6 +133,14 @@ public class Position extends Message {
     public static final String ALARM_TAMPERING = "tampering";
     public static final String ALARM_REMOVING = "removing";
 
+    public Position() {
+    }
+
+    public Position(String protocol) {
+        this.protocol = protocol;
+        this.serverTime = new Date();
+    }
+
     private String protocol;
 
     public String getProtocol() {
@@ -144,55 +154,31 @@ public class Position extends Message {
     private Date serverTime;
 
     public Date getServerTime() {
-        if (serverTime != null) {
-            return new Date(serverTime.getTime());
-        } else {
-            return null;
-        }
+        return serverTime;
     }
 
     public void setServerTime(Date serverTime) {
-        if (serverTime != null) {
-            this.serverTime = new Date(serverTime.getTime());
-        } else {
-            this.serverTime = null;
-        }
+        this.serverTime = serverTime;
     }
 
     private Date deviceTime;
 
     public Date getDeviceTime() {
-        if (deviceTime != null) {
-            return new Date(deviceTime.getTime());
-        } else {
-            return null;
-        }
+        return deviceTime;
     }
 
     public void setDeviceTime(Date deviceTime) {
-        if (deviceTime != null) {
-            this.deviceTime = new Date(deviceTime.getTime());
-        } else {
-            this.deviceTime = null;
-        }
+        this.deviceTime = deviceTime;
     }
 
     private Date fixTime;
 
     public Date getFixTime() {
-        if (fixTime != null) {
-            return new Date(fixTime.getTime());
-        } else {
-            return null;
-        }
+        return fixTime;
     }
 
     public void setFixTime(Date fixTime) {
-        if (fixTime != null) {
-            this.fixTime = new Date(fixTime.getTime());
-        } else {
-            this.fixTime = null;
-        }
+        this.fixTime = fixTime;
     }
 
     public void setTime(Date time) {
diff --git a/src/org/traccar/model/ScheduledModel.java b/src/org/traccar/model/ScheduledModel.java
new file mode 100644
index 000000000..9e6a4b9a6
--- /dev/null
+++ b/src/org/traccar/model/ScheduledModel.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2018 Andrey Kunitsyn (andrey@traccar.org)
+ *
+ * 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.model;
+
+public class ScheduledModel extends ExtendedModel {
+
+    private long calendarId;
+
+    public long getCalendarId() {
+        return calendarId;
+    }
+
+    public void setCalendarId(long calendarId) {
+        this.calendarId = calendarId;
+    }
+}
diff --git a/src/org/traccar/model/Server.java b/src/org/traccar/model/Server.java
index 072e85d55..c6161397b 100644
--- a/src/org/traccar/model/Server.java
+++ b/src/org/traccar/model/Server.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -157,4 +157,14 @@ public class Server extends ExtendedModel {
     public void setLimitCommands(boolean limitCommands) {
         this.limitCommands = limitCommands;
     }
+
+    private String poiLayer;
+
+    public String getPoiLayer() {
+        return poiLayer;
+    }
+
+    public void setPoiLayer(String poiLayer) {
+        this.poiLayer = poiLayer;
+    }
 }
diff --git a/src/org/traccar/model/Statistics.java b/src/org/traccar/model/Statistics.java
index 2acf8514f..cb72c91dd 100644
--- a/src/org/traccar/model/Statistics.java
+++ b/src/org/traccar/model/Statistics.java
@@ -22,19 +22,11 @@ public class Statistics extends ExtendedModel {
     private Date captureTime;
 
     public Date getCaptureTime() {
-        if (captureTime != null) {
-            return new Date(captureTime.getTime());
-        } else {
-            return null;
-        }
+        return captureTime;
     }
 
     public void setCaptureTime(Date captureTime) {
-        if (captureTime != null) {
-            this.captureTime = new Date(captureTime.getTime());
-        } else {
-            this.captureTime = null;
-        }
+        this.captureTime = captureTime;
     }
 
     private int activeUsers;
diff --git a/src/org/traccar/model/User.java b/src/org/traccar/model/User.java
index b1883213c..1a131a4e8 100644
--- a/src/org/traccar/model/User.java
+++ b/src/org/traccar/model/User.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -158,19 +158,11 @@ public class User extends ExtendedModel {
     private Date expirationTime;
 
     public Date getExpirationTime() {
-        if (expirationTime != null) {
-            return new Date(expirationTime.getTime());
-        } else {
-            return null;
-        }
+        return expirationTime;
     }
 
     public void setExpirationTime(Date expirationTime) {
-        if (expirationTime != null) {
-            this.expirationTime = new Date(expirationTime.getTime());
-        } else {
-            this.expirationTime = null;
-        }
+        this.expirationTime = expirationTime;
     }
 
     private int deviceLimit;
@@ -230,6 +222,16 @@ public class User extends ExtendedModel {
         this.limitCommands = limitCommands;
     }
 
+    private String poiLayer;
+
+    public String getPoiLayer() {
+        return poiLayer;
+    }
+
+    public void setPoiLayer(String poiLayer) {
+        this.poiLayer = poiLayer;
+    }
+
     @QueryIgnore
     public String getPassword() {
         return null;
diff --git a/src/org/traccar/notification/EventForwarder.java b/src/org/traccar/notification/EventForwarder.java
index 68c3ea221..9d2181e21 100644
--- a/src/org/traccar/notification/EventForwarder.java
+++ b/src/org/traccar/notification/EventForwarder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,7 +17,7 @@ package org.traccar.notification;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.ning.http.client.AsyncHttpClient.BoundRequestBuilder;
-import java.util.Arrays;
+import java.util.Collections;
 import java.util.List;
 
 import org.traccar.Context;
@@ -25,11 +25,14 @@ import org.traccar.helper.Log;
 import org.traccar.model.Device;
 import org.traccar.model.Event;
 import org.traccar.model.Geofence;
+import org.traccar.model.Maintenance;
 import org.traccar.model.Position;
 
 import java.nio.charset.StandardCharsets;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Set;
+
 import com.ning.http.client.FluentCaseInsensitiveStringsMap;
 
 public abstract class EventForwarder {
@@ -46,8 +49,10 @@ public abstract class EventForwarder {
     private static final String KEY_EVENT = "event";
     private static final String KEY_GEOFENCE = "geofence";
     private static final String KEY_DEVICE = "device";
+    private static final String KEY_MAINTENANCE = "maintenance";
+    private static final String KEY_USERS = "users";
 
-    public final void forwardEvent(Event event, Position position) {
+    public final void forwardEvent(Event event, Position position, Set<Long> users) {
 
         BoundRequestBuilder requestBuilder = Context.getAsyncHttpClient().preparePost(url);
         requestBuilder.setBodyEncoding(StandardCharsets.UTF_8.name());
@@ -60,7 +65,7 @@ public abstract class EventForwarder {
             requestBuilder.setHeaders(params);
         }
 
-        setContent(event, position, requestBuilder);
+        setContent(event, position, users, requestBuilder);
         requestBuilder.execute();
     }
 
@@ -73,30 +78,35 @@ public abstract class EventForwarder {
         for (String paramLine: paramsLines) {
             splitedLine = paramLine.split(separator, 2);
             if (splitedLine.length == 2) {
-                paramsMap.put(splitedLine[0].trim(), Arrays.asList(splitedLine[1].trim()));
+                paramsMap.put(splitedLine[0].trim(), Collections.singletonList(splitedLine[1].trim()));
             }
         }
         return paramsMap;
     }
 
-    protected String prepareJsonPayload(Event event, Position position) {
+    protected String prepareJsonPayload(Event event, Position position, Set<Long> users) {
         Map<String, Object> data = new HashMap<>();
         data.put(KEY_EVENT, event);
         if (position != null) {
             data.put(KEY_POSITION, position);
         }
-        if (event.getDeviceId() != 0) {
-            Device device = Context.getIdentityManager().getById(event.getDeviceId());
-            if (device != null) {
-                data.put(KEY_DEVICE, device);
-            }
+        Device device = Context.getIdentityManager().getById(event.getDeviceId());
+        if (device != null) {
+            data.put(KEY_DEVICE, device);
         }
         if (event.getGeofenceId() != 0) {
-            Geofence geofence = (Geofence) Context.getGeofenceManager().getById(event.getGeofenceId());
+            Geofence geofence = Context.getGeofenceManager().getById(event.getGeofenceId());
             if (geofence != null) {
                 data.put(KEY_GEOFENCE, geofence);
             }
         }
+        if (event.getMaintenanceId() != 0) {
+            Maintenance maintenance = Context.getMaintenancesManager().getById(event.getMaintenanceId());
+            if (maintenance != null) {
+                data.put(KEY_MAINTENANCE, maintenance);
+            }
+        }
+        data.put(KEY_USERS, Context.getUsersManager().getItems(users));
         try {
             return Context.getObjectMapper().writeValueAsString(data);
         } catch (JsonProcessingException e) {
@@ -106,6 +116,7 @@ public abstract class EventForwarder {
     }
 
     protected abstract String getContentType();
-    protected abstract void setContent(Event event, Position position, BoundRequestBuilder requestBuilder);
+    protected abstract void setContent(
+            Event event, Position position, Set<Long> users, BoundRequestBuilder requestBuilder);
 
 }
diff --git a/src/org/traccar/notification/JsonTypeEventForwarder.java b/src/org/traccar/notification/JsonTypeEventForwarder.java
index c1e4220d0..27ef61af1 100644
--- a/src/org/traccar/notification/JsonTypeEventForwarder.java
+++ b/src/org/traccar/notification/JsonTypeEventForwarder.java
@@ -1,5 +1,7 @@
 package org.traccar.notification;

 

+import java.util.Set;

+

 import org.traccar.model.Event;

 import org.traccar.model.Position;

 

@@ -13,8 +15,8 @@ public class JsonTypeEventForwarder extends EventForwarder {
     }

 

     @Override

-    protected void setContent(Event event, Position position, BoundRequestBuilder requestBuilder) {

-        requestBuilder.setBody(prepareJsonPayload(event, position));

+    protected void setContent(Event event, Position position, Set<Long> users, BoundRequestBuilder requestBuilder) {

+        requestBuilder.setBody(prepareJsonPayload(event, position, users));

     }

 

 }

diff --git a/src/org/traccar/notification/MultiPartEventForwarder.java b/src/org/traccar/notification/MultiPartEventForwarder.java
index f4c36d3e4..6227c66cc 100644
--- a/src/org/traccar/notification/MultiPartEventForwarder.java
+++ b/src/org/traccar/notification/MultiPartEventForwarder.java
@@ -3,6 +3,7 @@ package org.traccar.notification;
 import java.nio.charset.StandardCharsets;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import java.util.Map.Entry;
 
 import org.traccar.Context;
@@ -28,7 +29,7 @@ public class MultiPartEventForwarder extends EventForwarder {
     }
 
     @Override
-    protected void setContent(Event event, Position position, BoundRequestBuilder requestBuilder) {
+    protected void setContent(Event event, Position position, Set<Long> users, BoundRequestBuilder requestBuilder) {
 
         if (additionalParams != null && !additionalParams.isEmpty()) {
             Map<String, List<String>> paramsToAdd = splitIntoKeyValues(additionalParams, "=");
@@ -41,6 +42,6 @@ public class MultiPartEventForwarder extends EventForwarder {
             }
         }
         requestBuilder.addBodyPart(new StringPart(payloadParamName,
-                prepareJsonPayload(event, position), "application/json", StandardCharsets.UTF_8));
+                prepareJsonPayload(event, position, users), "application/json", StandardCharsets.UTF_8));
     }
 }
diff --git a/src/org/traccar/notification/NotificationFormatter.java b/src/org/traccar/notification/NotificationFormatter.java
index 114825a83..524153721 100644
--- a/src/org/traccar/notification/NotificationFormatter.java
+++ b/src/org/traccar/notification/NotificationFormatter.java
@@ -1,6 +1,6 @@
 /*
- * Copyright 2016 - 2017 Anton Tananaev (anton@traccar.org)
- * Copyright 2017 Andrey Kunitsyn (andrey@traccar.org)
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 - 2018 Andrey Kunitsyn (andrey@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -57,6 +57,9 @@ public final class NotificationFormatter {
         if (event.getGeofenceId() != 0) {
             velocityContext.put("geofence", Context.getGeofenceManager().getById(event.getGeofenceId()));
         }
+        if (event.getMaintenanceId() != 0) {
+            velocityContext.put("maintenance", Context.getMaintenancesManager().getById(event.getMaintenanceId()));
+        }
         String driverUniqueId = event.getString(Position.KEY_DRIVER_UNIQUE_ID);
         if (driverUniqueId != null) {
             velocityContext.put("driver", Context.getDriversManager().getDriverByUniqueId(driverUniqueId));
diff --git a/src/org/traccar/processing/ComputedAttributesHandler.java b/src/org/traccar/processing/ComputedAttributesHandler.java
index 1e702d17f..b37db05bf 100644
--- a/src/org/traccar/processing/ComputedAttributesHandler.java
+++ b/src/org/traccar/processing/ComputedAttributesHandler.java
@@ -102,10 +102,12 @@ public class ComputedAttributesHandler extends BaseDataHandler {
                     try {
                         switch (attribute.getType()) {
                             case "number":
-                                position.getAttributes().put(attribute.getAttribute(), (Number) result);
+                                Number numberValue = (Number) result;
+                                position.getAttributes().put(attribute.getAttribute(), numberValue);
                                 break;
                             case "boolean":
-                                position.getAttributes().put(attribute.getAttribute(), (Boolean) result);
+                                Boolean booleanValue = (Boolean) result;
+                                position.getAttributes().put(attribute.getAttribute(), booleanValue);
                                 break;
                             default:
                                 position.getAttributes().put(attribute.getAttribute(), result.toString());
diff --git a/src/org/traccar/protocol/AdmProtocolDecoder.java b/src/org/traccar/protocol/AdmProtocolDecoder.java
index f93c55e18..4ae16017a 100644
--- a/src/org/traccar/protocol/AdmProtocolDecoder.java
+++ b/src/org/traccar/protocol/AdmProtocolDecoder.java
@@ -46,8 +46,7 @@ public class AdmProtocolDecoder extends BaseProtocolDecoder {
         }
 
         if (BitUtil.to(type, 2) == 0) {
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte());
@@ -124,8 +123,7 @@ public class AdmProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         getLastLocation(position, null);
diff --git a/src/org/traccar/protocol/AisProtocolDecoder.java b/src/org/traccar/protocol/AisProtocolDecoder.java
index 1f7a12595..842260e98 100644
--- a/src/org/traccar/protocol/AisProtocolDecoder.java
+++ b/src/org/traccar/protocol/AisProtocolDecoder.java
@@ -61,8 +61,7 @@ public class AisProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             position.setTime(new Date());
diff --git a/src/org/traccar/protocol/AlematicsProtocolDecoder.java b/src/org/traccar/protocol/AlematicsProtocolDecoder.java
index da0704242..b83081cc1 100644
--- a/src/org/traccar/protocol/AlematicsProtocolDecoder.java
+++ b/src/org/traccar/protocol/AlematicsProtocolDecoder.java
@@ -113,8 +113,7 @@ public class AlematicsProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         position.set(Position.KEY_TYPE, parser.nextInt());
         position.set(Position.KEY_INDEX, parser.nextInt());
diff --git a/src/org/traccar/protocol/ApelProtocolDecoder.java b/src/org/traccar/protocol/ApelProtocolDecoder.java
index 6e16e02be..a107f7d6f 100644
--- a/src/org/traccar/protocol/ApelProtocolDecoder.java
+++ b/src/org/traccar/protocol/ApelProtocolDecoder.java
@@ -136,8 +136,7 @@ public class ApelProtocolDecoder extends BaseProtocolDecoder {
             }
 
             for (int j = 0; j < recordCount; j++) {
-                Position position = new Position();
-                position.setProtocol(getProtocolName());
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
 
                 int subtype = type;
diff --git a/src/org/traccar/protocol/AplicomProtocolDecoder.java b/src/org/traccar/protocol/AplicomProtocolDecoder.java
index c1d7ab087..7ed187937 100644
--- a/src/org/traccar/protocol/AplicomProtocolDecoder.java
+++ b/src/org/traccar/protocol/AplicomProtocolDecoder.java
@@ -608,8 +608,7 @@ public class AplicomProtocolDecoder extends BaseProtocolDecoder {
             selector = buf.readUnsignedMedium();
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
         if (deviceSession == null) {
             return null;
diff --git a/src/org/traccar/protocol/AppelloProtocolDecoder.java b/src/org/traccar/protocol/AppelloProtocolDecoder.java
index 30dec3941..bf95b4068 100644
--- a/src/org/traccar/protocol/AppelloProtocolDecoder.java
+++ b/src/org/traccar/protocol/AppelloProtocolDecoder.java
@@ -65,8 +65,7 @@ public class AppelloProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         if (parser.hasNext(6)) {
diff --git a/src/org/traccar/protocol/AquilaProtocolDecoder.java b/src/org/traccar/protocol/AquilaProtocolDecoder.java
index 773210b04..960139b3f 100644
--- a/src/org/traccar/protocol/AquilaProtocolDecoder.java
+++ b/src/org/traccar/protocol/AquilaProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,6 +21,8 @@ import org.traccar.DeviceSession;
 import org.traccar.helper.Parser;
 import org.traccar.helper.PatternBuilder;
 import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
 import org.traccar.model.Position;
 
 import java.net.SocketAddress;
@@ -32,7 +34,7 @@ public class AquilaProtocolDecoder extends BaseProtocolDecoder {
         super(protocol);
     }
 
-    private static final Pattern PATTERN = new PatternBuilder()
+    private static final Pattern PATTERN_A = new PatternBuilder()
             .text("$$")
             .expression("[^,]*,")                // client
             .number("(d+),")                     // device serial number
@@ -42,6 +44,7 @@ public class AquilaProtocolDecoder extends BaseProtocolDecoder {
             .number("(dd)(dd)(dd)")              // date (yymmdd)
             .number("(dd)(dd)(dd),")             // time (hhmmss)
             .expression("([AV]),")               // validity
+            .groupBegin()
             .number("(d+),")                     // gsm
             .number("(d+),")                     // speed
             .number("(d+),")                     // distance
@@ -120,15 +123,17 @@ public class AquilaProtocolDecoder extends BaseProtocolDecoder {
             .number("(d+),")                     // external voltage
             .number("(d+),")                     // internal voltage
             .groupEnd()
+            .or()
+            .number("(d+),")                     // sensor id
+            .expression("([^,]+),")              // sensor data
+            .groupEnd()
             .text("*")
             .number("xx")                        // checksum
             .compile();
 
-    @Override
-    protected Object decode(
-            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+    private Position decodeA(Channel channel, SocketAddress remoteAddress, String sentence) {
 
-        Parser parser = new Parser(PATTERN, (String) msg);
+        Parser parser = new Parser(PATTERN_A, sentence);
         if (!parser.matches()) {
             return null;
         }
@@ -138,8 +143,7 @@ public class AquilaProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.set(Position.KEY_EVENT, parser.nextInt(0));
@@ -151,11 +155,11 @@ public class AquilaProtocolDecoder extends BaseProtocolDecoder {
 
         position.setValid(parser.next().equals("A"));
 
-        position.set(Position.KEY_RSSI, parser.nextInt(0));
-
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
-
-        position.set(Position.KEY_ODOMETER, parser.nextInt(0));
+        if (parser.hasNext(3)) {
+            position.set(Position.KEY_RSSI, parser.nextInt(0));
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0));
+        }
 
         if (parser.hasNext(9)) {
 
@@ -187,7 +191,7 @@ public class AquilaProtocolDecoder extends BaseProtocolDecoder {
             String dtcs = parser.next();
             position.set(Position.KEY_DTCS, dtcs.substring(1, dtcs.length() - 1).replace('|', ' '));
 
-        } else {
+        } else if (parser.hasNext(10)) {
 
             position.setCourse(parser.nextInt(0));
 
@@ -201,9 +205,129 @@ public class AquilaProtocolDecoder extends BaseProtocolDecoder {
             position.set(Position.KEY_POWER, parser.nextInt(0));
             position.set(Position.KEY_BATTERY, parser.nextInt(0));
 
+        } else if (parser.hasNext(2)) {
+
+            position.set("sensorId", parser.nextInt());
+            position.set("sensorData", parser.next());
+
+        }
+
+        return position;
+    }
+
+    private static final Pattern PATTERN_B = new PatternBuilder()
+            .text("$Header,")
+            .expression("[^,]+,")                // client
+            .expression("[^,]+,")                // firmware version
+            .expression(".{2},")                 // type
+            .number("d+,")                       // message id
+            .expression("[LH],")                 // status
+            .number("(d+),")                     // imei
+            .expression("[^,]+,")                // registration number
+            .number("([01]),")                   // validity
+            .number("(dd)(dd)(dddd),")           // date (ddmmyyyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(-?d+.d+),")                // latitude
+            .expression("([NS]),")
+            .number("(-?d+.d+),")                // longitude
+            .expression("([EW]),")
+            .number("(d+.d+),")                  // speed
+            .number("(d+),")                     // course
+            .number("(d+),")                     // satellites
+            .number("(-?d+.d+),")                // altitude
+            .number("(d+.d+),")                  // pdop
+            .number("(d+.d+),")                  // hdop
+            .expression("[^,]+,")                // operator
+            .number("([01]),")                   // ignition
+            .number("([01]),")                   // charge
+            .number("(d+.d+),")                  // power
+            .number("(d+.d+),")                  // battery
+            .number("[01],")                     // emergency
+            .expression("[CO],")                 // tamper
+            .number("(d+),")                     // rssi
+            .number("(d+),")                     // mcc
+            .number("(d+),")                     // mnc
+            .number("(x+),")                     // lac
+            .number("(x+),")                     // cid
+            .number("(d+),(x+),(x+),")           // cell 1
+            .number("(d+),(x+),(x+),")           // cell 2
+            .number("(d+),(x+),(x+),")           // cell 3
+            .number("(d+),(x+),(x+),")           // cell 4
+            .number("([01])+,")                  // inputs
+            .number("([01])+,")                  // outputs
+            .number("d+,")                       // frame number
+            .number("(d+.d+),")                  // adc1
+            .number("(d+.d+),")                  // adc2
+            .number("d+,")                       // delta distance
+            .any()
+            .compile();
+
+    private Position decodeB(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN_B, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(parser.nextInt() == 1);
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+        position.setCourse(parser.nextInt());
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+
+        position.setAltitude(parser.nextDouble());
+
+        position.set(Position.KEY_PDOP, parser.nextDouble());
+        position.set(Position.KEY_HDOP, parser.nextDouble());
+        position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
+        position.set(Position.KEY_CHARGE, parser.nextInt() == 1);
+        position.set(Position.KEY_POWER, parser.nextDouble());
+        position.set(Position.KEY_BATTERY, parser.nextDouble());
+
+        Network network = new Network();
+
+        int rssi = parser.nextInt();
+        int mcc = parser.nextInt();
+        int mnc = parser.nextInt();
+
+        network.addCellTower(CellTower.from(mcc, mnc, parser.nextHexInt(), parser.nextHexInt(), rssi));
+        for (int i = 0; i < 4; i++) {
+            rssi = parser.nextInt();
+            network.addCellTower(CellTower.from(mcc, mnc, parser.nextHexInt(), parser.nextHexInt(), rssi));
         }
 
+        position.setNetwork(network);
+
+        position.set(Position.KEY_INPUT, parser.nextBinInt());
+        position.set(Position.KEY_OUTPUT, parser.nextBinInt());
+        position.set(Position.PREFIX_ADC + 1, parser.nextDouble());
+        position.set(Position.PREFIX_ADC + 2, parser.nextDouble());
+
         return position;
     }
 
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.startsWith("$$")) {
+            return decodeA(channel, remoteAddress, sentence);
+        } else {
+            return decodeB(channel, remoteAddress, sentence);
+        }
+    }
+
 }
diff --git a/src/org/traccar/protocol/Ardi01ProtocolDecoder.java b/src/org/traccar/protocol/Ardi01ProtocolDecoder.java
index 7a5bd217c..dea9e3483 100644
--- a/src/org/traccar/protocol/Ardi01ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Ardi01ProtocolDecoder.java
@@ -56,8 +56,7 @@ public class Ardi01ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/ArknavProtocolDecoder.java b/src/org/traccar/protocol/ArknavProtocolDecoder.java
index 927c50c29..aeea4a734 100644
--- a/src/org/traccar/protocol/ArknavProtocolDecoder.java
+++ b/src/org/traccar/protocol/ArknavProtocolDecoder.java
@@ -58,8 +58,7 @@ public class ArknavProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/ArknavX8ProtocolDecoder.java b/src/org/traccar/protocol/ArknavX8ProtocolDecoder.java
index 8a80901b5..47cc267fe 100644
--- a/src/org/traccar/protocol/ArknavX8ProtocolDecoder.java
+++ b/src/org/traccar/protocol/ArknavX8ProtocolDecoder.java
@@ -65,8 +65,7 @@ public class ArknavX8ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.set(Position.KEY_TYPE, parser.next());
diff --git a/src/org/traccar/protocol/ArnaviProtocolDecoder.java b/src/org/traccar/protocol/ArnaviProtocolDecoder.java
index 9c4ab5d05..ec96343fe 100644
--- a/src/org/traccar/protocol/ArnaviProtocolDecoder.java
+++ b/src/org/traccar/protocol/ArnaviProtocolDecoder.java
@@ -65,8 +65,7 @@ public class ArnaviProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/AstraProtocolDecoder.java b/src/org/traccar/protocol/AstraProtocolDecoder.java
index 8d86cd2be..79c7eba3f 100644
--- a/src/org/traccar/protocol/AstraProtocolDecoder.java
+++ b/src/org/traccar/protocol/AstraProtocolDecoder.java
@@ -63,8 +63,7 @@ public class AstraProtocolDecoder extends BaseProtocolDecoder {
 
         while (buf.readableBytes() > 2) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             buf.readUnsignedByte(); // index
diff --git a/src/org/traccar/protocol/At2000ProtocolDecoder.java b/src/org/traccar/protocol/At2000ProtocolDecoder.java
index 70840c37d..e0f2b4278 100644
--- a/src/org/traccar/protocol/At2000ProtocolDecoder.java
+++ b/src/org/traccar/protocol/At2000ProtocolDecoder.java
@@ -20,13 +20,13 @@ import org.jboss.netty.buffer.ChannelBuffers;
 import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
 import org.traccar.DeviceSession;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.UnitsConverter;
 import org.traccar.model.Position;
 
 import javax.crypto.Cipher;
 import javax.crypto.spec.IvParameterSpec;
 import javax.crypto.spec.SecretKeySpec;
-import javax.xml.bind.DatatypeConverter;
 import java.net.SocketAddress;
 import java.nio.ByteOrder;
 import java.nio.charset.StandardCharsets;
@@ -84,7 +84,7 @@ public class At2000ProtocolDecoder extends BaseProtocolDecoder {
                 IvParameterSpec ivSpec = new IvParameterSpec(iv);
 
                 SecretKeySpec keySpec = new SecretKeySpec(
-                        DatatypeConverter.parseHexBinary("000102030405060708090a0b0c0d0e0f"), "AES");
+                        DataConverter.parseHex("000102030405060708090a0b0c0d0e0f"), "AES");
 
                 cipher = Cipher.getInstance("AES/CBC/NoPadding");
                 cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
@@ -114,8 +114,7 @@ public class At2000ProtocolDecoder extends BaseProtocolDecoder {
 
             while (buf.readableBytes() >= 63) {
 
-                Position position = new Position();
-                position.setProtocol(getProtocolName());
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
 
                 buf.readUnsignedShort(); // index
diff --git a/src/org/traccar/protocol/AtrackProtocolDecoder.java b/src/org/traccar/protocol/AtrackProtocolDecoder.java
index 23cb67e15..8138f0fcb 100644
--- a/src/org/traccar/protocol/AtrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/AtrackProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -36,6 +36,7 @@ import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
+import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 public class AtrackProtocolDecoder extends BaseProtocolDecoder {
@@ -43,6 +44,7 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
     private static final int MIN_DATA_LENGTH = 40;
 
     private boolean longDate;
+    private boolean decimalFuel;
     private boolean custom;
     private String form;
 
@@ -52,6 +54,7 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
         super(protocol);
 
         longDate = Context.getConfig().getBoolean(getProtocolName() + ".longDate");
+        decimalFuel = Context.getConfig().getBoolean(getProtocolName() + ".decimalFuel");
 
         custom = Context.getConfig().getBoolean(getProtocolName() + ".custom");
         form = Context.getConfig().getString(getProtocolName() + ".form");
@@ -217,8 +220,7 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
             .compile();
 
     private Position decodeString(Channel channel, SocketAddress remoteAddress, String sentence) {
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         getLastLocation(position, null);
 
@@ -288,8 +290,7 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
 
         while (buf.readableBytes() >= MIN_DATA_LENGTH) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             if (longDate) {
@@ -332,7 +333,17 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
             position.set(Position.PREFIX_TEMP + 1, buf.readShort() * 0.1);
             position.set(Position.PREFIX_TEMP + 2, buf.readShort() * 0.1);
 
-            position.set("message", readString(buf));
+            String message = readString(buf);
+            if (message != null && !message.isEmpty()) {
+                Pattern pattern = Pattern.compile("FULS:F=(\\p{XDigit}+) t=(\\p{XDigit}+) N=(\\p{XDigit}+)");
+                Matcher matcher = pattern.matcher(message);
+                if (matcher.find()) {
+                    int value = Integer.parseInt(matcher.group(3), decimalFuel ? 10 : 16);
+                    position.set(Position.KEY_FUEL_LEVEL, value * 0.1);
+                } else {
+                    position.set("message", message);
+                }
+            }
 
             if (custom) {
                 String form = this.form;
diff --git a/src/org/traccar/protocol/AuroProtocolDecoder.java b/src/org/traccar/protocol/AuroProtocolDecoder.java
index a45d14709..3cb3a440c 100644
--- a/src/org/traccar/protocol/AuroProtocolDecoder.java
+++ b/src/org/traccar/protocol/AuroProtocolDecoder.java
@@ -62,8 +62,7 @@ public class AuroProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         position.set(Position.KEY_INDEX, parser.nextInt(0));
 
diff --git a/src/org/traccar/protocol/AutoFonProtocolDecoder.java b/src/org/traccar/protocol/AutoFonProtocolDecoder.java
index 32b4bfa74..e243b93ea 100644
--- a/src/org/traccar/protocol/AutoFonProtocolDecoder.java
+++ b/src/org/traccar/protocol/AutoFonProtocolDecoder.java
@@ -62,8 +62,7 @@ public class AutoFonProtocolDecoder extends BaseProtocolDecoder {
 
     private Position decodePosition(DeviceSession deviceSession, ChannelBuffer buf, boolean history) {
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         if (!history) {
@@ -167,8 +166,7 @@ public class AutoFonProtocolDecoder extends BaseProtocolDecoder {
 
         } else if (type == MSG_45_LOCATION) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             short status = buf.readUnsignedByte();
diff --git a/src/org/traccar/protocol/AutoGradeProtocolDecoder.java b/src/org/traccar/protocol/AutoGradeProtocolDecoder.java
index 753509f31..b98c68cbd 100644
--- a/src/org/traccar/protocol/AutoGradeProtocolDecoder.java
+++ b/src/org/traccar/protocol/AutoGradeProtocolDecoder.java
@@ -72,8 +72,7 @@ public class AutoGradeProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
diff --git a/src/org/traccar/protocol/Avl301ProtocolDecoder.java b/src/org/traccar/protocol/Avl301ProtocolDecoder.java
index cc61be91b..056395d35 100644
--- a/src/org/traccar/protocol/Avl301ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Avl301ProtocolDecoder.java
@@ -88,9 +88,8 @@ public class Avl301ProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
-            position.setProtocol(getProtocolName());
 
             DateBuilder dateBuilder = new DateBuilder()
                     .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
diff --git a/src/org/traccar/protocol/BceProtocolDecoder.java b/src/org/traccar/protocol/BceProtocolDecoder.java
index b472ac6c9..a023e60c5 100644
--- a/src/org/traccar/protocol/BceProtocolDecoder.java
+++ b/src/org/traccar/protocol/BceProtocolDecoder.java
@@ -21,6 +21,7 @@ import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
 import org.traccar.DeviceSession;
 import org.traccar.helper.BitUtil;
+import org.traccar.helper.UnitsConverter;
 import org.traccar.model.CellTower;
 import org.traccar.model.Network;
 import org.traccar.model.Position;
@@ -67,8 +68,7 @@ public class BceProtocolDecoder extends BaseProtocolDecoder {
 
             while (buf.readerIndex() < dataEnd) {
 
-                Position position = new Position();
-                position.setProtocol(getProtocolName());
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
 
                 int structEnd = buf.readUnsignedByte() + buf.readerIndex();
@@ -94,7 +94,7 @@ public class BceProtocolDecoder extends BaseProtocolDecoder {
                         position.setValid(true);
                         position.setLongitude(buf.readFloat());
                         position.setLatitude(buf.readFloat());
-                        position.setSpeed(buf.readUnsignedByte());
+                        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
 
                         int gps = buf.readUnsignedByte();
                         position.set(Position.KEY_SATELLITES, gps & 0xf);
diff --git a/src/org/traccar/protocol/BlackKiteProtocolDecoder.java b/src/org/traccar/protocol/BlackKiteProtocolDecoder.java
index 561d7c18b..7fc39fc7c 100644
--- a/src/org/traccar/protocol/BlackKiteProtocolDecoder.java
+++ b/src/org/traccar/protocol/BlackKiteProtocolDecoder.java
@@ -76,8 +76,7 @@ public class BlackKiteProtocolDecoder extends BaseProtocolDecoder {
         List<Position> positions = new LinkedList<>();
         Set<Integer> tags = new HashSet<>();
         boolean hasLocation = false;
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         while (buf.readerIndex() < length) {
 
@@ -89,7 +88,7 @@ public class BlackKiteProtocolDecoder extends BaseProtocolDecoder {
                 }
                 tags.clear();
                 hasLocation = false;
-                position = new Position();
+                position = new Position(getProtocolName());
             }
             tags.add(tag);
 
diff --git a/src/org/traccar/protocol/BoxProtocolDecoder.java b/src/org/traccar/protocol/BoxProtocolDecoder.java
index 562731657..63238bcef 100644
--- a/src/org/traccar/protocol/BoxProtocolDecoder.java
+++ b/src/org/traccar/protocol/BoxProtocolDecoder.java
@@ -77,9 +77,8 @@ public class BoxProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
-            position.setProtocol(getProtocolName());
 
             position.setTime(parser.nextDateTime());
 
diff --git a/src/org/traccar/protocol/CalAmpProtocolDecoder.java b/src/org/traccar/protocol/CalAmpProtocolDecoder.java
index 557e2d6e6..f717d3c5d 100644
--- a/src/org/traccar/protocol/CalAmpProtocolDecoder.java
+++ b/src/org/traccar/protocol/CalAmpProtocolDecoder.java
@@ -66,9 +66,8 @@ public class CalAmpProtocolDecoder extends BaseProtocolDecoder {
 
     private Position decodePosition(DeviceSession deviceSession, int type, ChannelBuffer buf) {
 
-        Position position = new Position();
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
-        position.setProtocol(getProtocolName());
 
         position.setTime(new Date(buf.readUnsignedInt() * 1000));
         if (type != MSG_MINI_EVENT_REPORT) {
diff --git a/src/org/traccar/protocol/CarTrackProtocolDecoder.java b/src/org/traccar/protocol/CarTrackProtocolDecoder.java
index 3064bbb35..94215379d 100644
--- a/src/org/traccar/protocol/CarTrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/CarTrackProtocolDecoder.java
@@ -65,8 +65,7 @@ public class CarTrackProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/CarcellProtocolDecoder.java b/src/org/traccar/protocol/CarcellProtocolDecoder.java
index fc5710f09..52b777b81 100644
--- a/src/org/traccar/protocol/CarcellProtocolDecoder.java
+++ b/src/org/traccar/protocol/CarcellProtocolDecoder.java
@@ -85,8 +85,7 @@ public class CarcellProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.set(Position.KEY_ARCHIVE, parser.next().equals("%"));
         position.setValid(true);
 
diff --git a/src/org/traccar/protocol/CarscopProtocolDecoder.java b/src/org/traccar/protocol/CarscopProtocolDecoder.java
index 2a081bcdd..7f9dcc3b7 100644
--- a/src/org/traccar/protocol/CarscopProtocolDecoder.java
+++ b/src/org/traccar/protocol/CarscopProtocolDecoder.java
@@ -73,9 +73,8 @@ public class CarscopProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
-        position.setProtocol(getProtocolName());
 
         DateBuilder dateBuilder = new DateBuilder()
                 .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
diff --git a/src/org/traccar/protocol/CastelProtocol.java b/src/org/traccar/protocol/CastelProtocol.java
index db9df0674..d5ba5cd55 100644
--- a/src/org/traccar/protocol/CastelProtocol.java
+++ b/src/org/traccar/protocol/CastelProtocol.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,6 +21,7 @@ import org.jboss.netty.channel.ChannelPipeline;
 import org.jboss.netty.handler.codec.frame.LengthFieldBasedFrameDecoder;
 import org.traccar.BaseProtocol;
 import org.traccar.TrackerServer;
+import org.traccar.model.Command;
 
 import java.nio.ByteOrder;
 import java.util.List;
@@ -29,6 +30,9 @@ public class CastelProtocol extends BaseProtocol {
 
     public CastelProtocol() {
         super("castel");
+        setSupportedDataCommands(
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME);
     }
 
     @Override
@@ -37,6 +41,7 @@ public class CastelProtocol extends BaseProtocol {
             @Override
             protected void addSpecificHandlers(ChannelPipeline pipeline) {
                 pipeline.addLast("frameDecoder", new LengthFieldBasedFrameDecoder(1024, 2, 2, -4, 0));
+                pipeline.addLast("objectEncoder", new CastelProtocolEncoder());
                 pipeline.addLast("objectDecoder", new CastelProtocolDecoder(CastelProtocol.this));
             }
         };
@@ -46,6 +51,7 @@ public class CastelProtocol extends BaseProtocol {
         server = new TrackerServer(new ConnectionlessBootstrap(), getName()) {
             @Override
             protected void addSpecificHandlers(ChannelPipeline pipeline) {
+                pipeline.addLast("objectEncoder", new CastelProtocolEncoder());
                 pipeline.addLast("objectDecoder", new CastelProtocolDecoder(CastelProtocol.this));
             }
         };
diff --git a/src/org/traccar/protocol/CastelProtocolDecoder.java b/src/org/traccar/protocol/CastelProtocolDecoder.java
index 5eedc69f9..44a5e213c 100644
--- a/src/org/traccar/protocol/CastelProtocolDecoder.java
+++ b/src/org/traccar/protocol/CastelProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -96,12 +96,12 @@ public class CastelProtocolDecoder extends BaseProtocolDecoder {
     public static final short MSG_CC_LOGIN = 0x4001;
     public static final short MSG_CC_LOGIN_RESPONSE = (short) 0x8001;
     public static final short MSG_CC_HEARTBEAT = 0x4206;
+    public static final short MSG_CC_PETROL_CONTROL = 0x4583;
     public static final short MSG_CC_HEARTBEAT_RESPONSE = (short) 0x8206;
 
     private Position readPosition(DeviceSession deviceSession, ChannelBuffer buf) {
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
@@ -131,8 +131,7 @@ public class CastelProtocolDecoder extends BaseProtocolDecoder {
 
     private Position createPosition(DeviceSession deviceSession) {
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         getLastLocation(position, null);
@@ -401,7 +400,6 @@ public class CastelProtocolDecoder extends BaseProtocolDecoder {
         return null;
     }
 
-
     private Object decodeCc(
             Channel channel, SocketAddress remoteAddress, ChannelBuffer buf,
             int version, ChannelBuffer id, int type, DeviceSession deviceSession) {
@@ -459,6 +457,47 @@ public class CastelProtocolDecoder extends BaseProtocolDecoder {
         return null;
     }
 
+    private Object decodeMpip(
+            Channel channel, SocketAddress remoteAddress, ChannelBuffer buf,
+            int version, ChannelBuffer id, int type, DeviceSession deviceSession) {
+
+        if (type == 0x4001) {
+
+            sendResponse(channel, remoteAddress, version, id, (short) type, null);
+
+            return readPosition(deviceSession, buf);
+
+        } else if (type == 0x2001) {
+
+            sendResponse(channel, remoteAddress, id, (short) 0x1001);
+
+            buf.readUnsignedInt(); // index
+            buf.readUnsignedInt(); // unix time
+            buf.readUnsignedByte();
+
+            return readPosition(deviceSession, buf);
+
+        } else if (type == 0x4201 || type == 0x4202 || type == 0x4206) {
+
+            return readPosition(deviceSession, buf);
+
+        } else if (type == 0x4204) {
+
+            List<Position> positions = new LinkedList<>();
+
+            for (int i = 0; i < 8; i++) {
+                Position position = readPosition(deviceSession, buf);
+                buf.skipBytes(31);
+                positions.add(position);
+            }
+
+            return positions;
+
+        }
+
+        return null;
+    }
+
     @Override
     protected Object decode(
             Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
@@ -482,31 +521,15 @@ public class CastelProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        if (version == -1) {
-
-            if (type == 0x2001) {
-
-                sendResponse(channel, remoteAddress, id, (short) 0x1001);
-
-                buf.readUnsignedInt(); // index
-                buf.readUnsignedInt(); // unix time
-                buf.readUnsignedByte();
-
-                return readPosition(deviceSession, buf);
-
-            }
-
-        } else if (version == 3 || version == 4) {
-
-            return decodeSc(channel, remoteAddress, buf, version, id, type, deviceSession);
-
-        } else {
-
-            return decodeCc(channel, remoteAddress, buf, version, id, type, deviceSession);
-
+        switch (version) {
+            case -1:
+                return decodeMpip(channel, remoteAddress, buf, version, id, type, deviceSession);
+            case 3:
+            case 4:
+                return decodeSc(channel, remoteAddress, buf, version, id, type, deviceSession);
+            default:
+                return decodeCc(channel, remoteAddress, buf, version, id, type, deviceSession);
         }
-
-        return null;
     }
 
 }
diff --git a/src/org/traccar/protocol/CastelProtocolEncoder.java b/src/org/traccar/protocol/CastelProtocolEncoder.java
new file mode 100644
index 000000000..806dac19e
--- /dev/null
+++ b/src/org/traccar/protocol/CastelProtocolEncoder.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.Context;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.Log;
+import org.traccar.model.Command;
+
+import java.nio.ByteOrder;
+import java.nio.charset.StandardCharsets;
+
+public class CastelProtocolEncoder extends BaseProtocolEncoder {
+
+    private ChannelBuffer encodeContent(long deviceId, short type, ChannelBuffer content) {
+        ChannelBuffer buf = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+        String uniqueId = Context.getIdentityManager().getById(deviceId).getUniqueId();
+
+        buf.writeByte('@');
+        buf.writeByte('@');
+
+        buf.writeShort(2 + 2 + 1 + 20 + 2 + content.readableBytes() + 2 + 2); // length
+
+        buf.writeByte(1); // protocol version
+
+        buf.writeBytes(uniqueId.getBytes(StandardCharsets.US_ASCII));
+        buf.writeZero(20 - uniqueId.length());
+
+        buf.writeShort(ChannelBuffers.swapShort(type));
+        buf.writeBytes(content);
+
+        buf.writeShort(Checksum.crc16(Checksum.CRC16_X25, buf.toByteBuffer()));
+
+        buf.writeByte('\r');
+        buf.writeByte('\n');
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+        ChannelBuffer content = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+        switch (command.getType()) {
+            case Command.TYPE_ENGINE_STOP:
+                content.writeByte(1);
+                return encodeContent(command.getDeviceId(), CastelProtocolDecoder.MSG_CC_PETROL_CONTROL, content);
+            case Command.TYPE_ENGINE_RESUME:
+                content.writeByte(0);
+                return encodeContent(command.getDeviceId(), CastelProtocolDecoder.MSG_CC_PETROL_CONTROL, content);
+            default:
+                Log.warning(new UnsupportedOperationException(command.getType()));
+                break;
+        }
+        return null;
+    }
+
+}
diff --git a/src/org/traccar/protocol/CautelaProtocol.java b/src/org/traccar/protocol/CautelaProtocol.java
new file mode 100644
index 000000000..89ab7a1d0
--- /dev/null
+++ b/src/org/traccar/protocol/CautelaProtocol.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.jboss.netty.bootstrap.ServerBootstrap;
+import org.jboss.netty.channel.ChannelPipeline;
+import org.jboss.netty.handler.codec.frame.LineBasedFrameDecoder;
+import org.jboss.netty.handler.codec.string.StringDecoder;
+import org.jboss.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.TrackerServer;
+
+import java.util.List;
+
+public class CautelaProtocol extends BaseProtocol {
+
+    public CautelaProtocol() {
+        super("cautela");
+    }
+
+    @Override
+    public void initTrackerServers(List<TrackerServer> serverList) {
+        serverList.add(new TrackerServer(new ServerBootstrap(), getName()) {
+            @Override
+            protected void addSpecificHandlers(ChannelPipeline pipeline) {
+                pipeline.addLast("frameDecoder", new LineBasedFrameDecoder(1024));
+                pipeline.addLast("stringEncoder", new StringEncoder());
+                pipeline.addLast("stringDecoder", new StringDecoder());
+                pipeline.addLast("objectDecoder", new CautelaProtocolDecoder(CautelaProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/org/traccar/protocol/CautelaProtocolDecoder.java b/src/org/traccar/protocol/CautelaProtocolDecoder.java
new file mode 100644
index 000000000..d7bf4fb51
--- /dev/null
+++ b/src/org/traccar/protocol/CautelaProtocolDecoder.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.jboss.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class CautelaProtocolDecoder extends BaseProtocolDecoder {
+
+    public CautelaProtocolDecoder(CautelaProtocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("(d+),")                     // type
+            .number("(d+),")                     // imei
+            .number("(dd),(dd),(dd),")           // date (ddmmyy)
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .number("(dd)(dd),")                 // time (hhmm)
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        String type = parser.next();
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder();
+        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+
+        position.setValid(true);
+        position.setLatitude(parser.nextDouble());
+        position.setLongitude(parser.nextDouble());
+
+        dateBuilder.setHour(parser.nextInt()).setMinute(parser.nextInt());
+        position.setTime(dateBuilder.getDate());
+
+        return position;
+    }
+
+}
diff --git a/src/org/traccar/protocol/CellocatorProtocolDecoder.java b/src/org/traccar/protocol/CellocatorProtocolDecoder.java
index 7ef013e28..67db9aa7d 100644
--- a/src/org/traccar/protocol/CellocatorProtocolDecoder.java
+++ b/src/org/traccar/protocol/CellocatorProtocolDecoder.java
@@ -100,8 +100,7 @@ public class CellocatorProtocolDecoder extends BaseProtocolDecoder {
 
         if (type == MSG_CLIENT_STATUS) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
 
             DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(deviceUniqueId));
             if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/CguardProtocolDecoder.java b/src/org/traccar/protocol/CguardProtocolDecoder.java
index 54f83fb73..2e20537c8 100644
--- a/src/org/traccar/protocol/CguardProtocolDecoder.java
+++ b/src/org/traccar/protocol/CguardProtocolDecoder.java
@@ -58,8 +58,7 @@ public class CguardProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.setTime(parser.nextDateTime());
@@ -84,8 +83,7 @@ public class CguardProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         getLastLocation(position, parser.nextDateTime());
diff --git a/src/org/traccar/protocol/CityeasyProtocolDecoder.java b/src/org/traccar/protocol/CityeasyProtocolDecoder.java
index 9a614730f..7a1d8119d 100644
--- a/src/org/traccar/protocol/CityeasyProtocolDecoder.java
+++ b/src/org/traccar/protocol/CityeasyProtocolDecoder.java
@@ -91,8 +91,7 @@ public class CityeasyProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             if (parser.hasNext(15)) {
diff --git a/src/org/traccar/protocol/ContinentalProtocol.java b/src/org/traccar/protocol/ContinentalProtocol.java
new file mode 100644
index 000000000..e2b1226cf
--- /dev/null
+++ b/src/org/traccar/protocol/ContinentalProtocol.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.jboss.netty.bootstrap.ServerBootstrap;
+import org.jboss.netty.channel.ChannelPipeline;
+import org.jboss.netty.handler.codec.frame.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.TrackerServer;
+
+import java.util.List;
+
+public class ContinentalProtocol extends BaseProtocol {
+
+    public ContinentalProtocol() {
+        super("continental");
+    }
+
+    @Override
+    public void initTrackerServers(List<TrackerServer> serverList) {
+        serverList.add(new TrackerServer(new ServerBootstrap(), getName()) {
+            @Override
+            protected void addSpecificHandlers(ChannelPipeline pipeline) {
+                pipeline.addLast("frameDecoder", new LengthFieldBasedFrameDecoder(1024, 2, 2));
+                pipeline.addLast("objectDecoder", new ContinentalProtocolDecoder(ContinentalProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/org/traccar/protocol/ContinentalProtocolDecoder.java b/src/org/traccar/protocol/ContinentalProtocolDecoder.java
new file mode 100644
index 000000000..726d9e16b
--- /dev/null
+++ b/src/org/traccar/protocol/ContinentalProtocolDecoder.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.jboss.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+
+public class ContinentalProtocolDecoder extends BaseProtocolDecoder {
+
+    public ContinentalProtocolDecoder(ContinentalProtocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_KEEPALIVE = 0x00;
+    public static final int MSG_STATUS = 0x02;
+    public static final int MSG_ACK = 0x06;
+    public static final int MSG_NACK = 0x15;
+
+    private void sendResponse(Channel channel, long serialNumber) {
+        if (channel != null) {
+            ChannelBuffer response = ChannelBuffers.dynamicBuffer();
+
+            response.writeByte('S');
+            response.writeByte('V');
+            response.writeShort(2 + 2 + 1 + 4 + 2); // length
+            response.writeByte(1); // version
+            response.writeInt((int) serialNumber);
+            response.writeByte(0); // product
+            response.writeByte(MSG_ACK);
+
+            channel.write(response);
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ChannelBuffer buf = (ChannelBuffer) msg;
+
+        buf.skipBytes(2); // header
+        buf.readUnsignedShort(); // length
+        buf.readUnsignedByte(); // software version
+
+        long serialNumber = buf.readUnsignedInt();
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(serialNumber));
+        if (deviceSession == null) {
+            return null;
+        }
+
+        sendResponse(channel, serialNumber);
+
+        buf.readUnsignedByte(); // product
+
+        int type = buf.readUnsignedByte();
+
+        if (type == MSG_STATUS) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setFixTime(new Date(buf.readUnsignedInt() * 1000L));
+
+            buf.readUnsignedByte();
+            position.setLatitude(buf.readMedium() / 3600.0);
+
+            buf.readUnsignedByte();
+            position.setLongitude(buf.readMedium() / 3600.0);
+
+            position.setCourse(buf.readUnsignedShort());
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
+
+            position.setValid(buf.readUnsignedByte() > 0);
+
+            position.setDeviceTime(new Date(buf.readUnsignedInt() * 1000L));
+
+            position.set(Position.KEY_EVENT, buf.readUnsignedShort());
+            position.set(Position.KEY_INPUT, buf.readUnsignedShort());
+            position.set(Position.KEY_OUTPUT, buf.readUnsignedShort());
+            position.set(Position.KEY_BATTERY, buf.readUnsignedByte());
+            position.set(Position.KEY_DEVICE_TEMP, buf.readByte());
+
+            buf.readUnsignedShort(); // reserved
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/org/traccar/protocol/CradlepointProtocolDecoder.java b/src/org/traccar/protocol/CradlepointProtocolDecoder.java
index e8f95a60c..f74830756 100644
--- a/src/org/traccar/protocol/CradlepointProtocolDecoder.java
+++ b/src/org/traccar/protocol/CradlepointProtocolDecoder.java
@@ -65,8 +65,7 @@ public class CradlepointProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         int time = parser.nextInt();
diff --git a/src/org/traccar/protocol/DishaProtocolDecoder.java b/src/org/traccar/protocol/DishaProtocolDecoder.java
index ab0a63215..a4e567b34 100644
--- a/src/org/traccar/protocol/DishaProtocolDecoder.java
+++ b/src/org/traccar/protocol/DishaProtocolDecoder.java
@@ -65,8 +65,7 @@ public class DishaProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/DmtHttpProtocolDecoder.java b/src/org/traccar/protocol/DmtHttpProtocolDecoder.java
index dbcc7a6f8..200a20759 100644
--- a/src/org/traccar/protocol/DmtHttpProtocolDecoder.java
+++ b/src/org/traccar/protocol/DmtHttpProtocolDecoder.java
@@ -64,8 +64,7 @@ public class DmtHttpProtocolDecoder extends BaseHttpProtocolDecoder {
         JsonArray records = root.getJsonArray("Records");
 
         for (int i = 0; i < records.size(); i++) {
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             JsonObject record = records.getJsonObject(i);
diff --git a/src/org/traccar/protocol/DmtProtocolDecoder.java b/src/org/traccar/protocol/DmtProtocolDecoder.java
index 39462a469..30a6ae13a 100644
--- a/src/org/traccar/protocol/DmtProtocolDecoder.java
+++ b/src/org/traccar/protocol/DmtProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,6 +21,7 @@ import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
 import org.traccar.DeviceSession;
 import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
 import org.traccar.helper.UnitsConverter;
 import org.traccar.model.Position;
 
@@ -42,144 +43,241 @@ public class DmtProtocolDecoder extends BaseProtocolDecoder {
     public static final int MSG_DATA_RECORD = 0x04;
     public static final int MSG_COMMIT = 0x05;
     public static final int MSG_COMMIT_RESPONSE = 0x06;
+    public static final int MSG_DATA_RECORD_64 = 0x10;
+
+    public static final int MSG_CANNED_REQUEST_1 = 0x14;
+    public static final int MSG_CANNED_RESPONSE_1 = 0x15;
+    public static final int MSG_CANNED_REQUEST_2 = 0x22;
+    public static final int MSG_CANNED_RESPONSE_2 = 0x23;
+
+    private void sendResponse(Channel channel, int type, ChannelBuffer content) {
+        if (channel != null) {
+            ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+            response.writeByte(0x02); response.writeByte(0x55); // header
+            response.writeByte(type);
+            response.writeShort(content != null ? content.readableBytes() : 0);
+            if (content != null) {
+                response.writeBytes(content);
+            }
+            channel.write(response);
+        }
+    }
 
-    @Override
-    protected Object decode(
-            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+    private List<Position> decodeFixed64(Channel channel, SocketAddress remoteAddress, ChannelBuffer buf) {
 
-        ChannelBuffer buf = (ChannelBuffer) msg;
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
 
-        buf.skipBytes(2); // header
+        List<Position> positions = new LinkedList<>();
 
-        int type = buf.readUnsignedByte();
+        while (buf.readableBytes() >= 64) {
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
 
-        buf.readUnsignedShort(); // length
+            buf.readByte(); // type
 
-        if (type == MSG_HELLO) {
+            position.set(Position.KEY_INDEX, buf.readUnsignedInt());
 
-            buf.readUnsignedInt(); // device serial number
+            long time = buf.readUnsignedInt();
+            position.setTime(new DateBuilder()
+                    .setYear((int) (2000 + (time & 0x3F)))
+                    .setMonth((int) (time >> 6) & 0xF)
+                    .setDay((int) (time >> 10) & 0x1F)
+                    .setHour((int) (time >> 15) & 0x1F)
+                    .setMinute((int) (time >> 20) & 0x3F)
+                    .setSecond((int) (time >> 26) & 0x3F)
+                    .getDate());
 
-            DeviceSession deviceSession = getDeviceSession(
-                    channel, remoteAddress, buf.readBytes(15).toString(StandardCharsets.US_ASCII));
+            position.setLongitude(buf.readInt() * 0.0000001);
+            position.setLatitude(buf.readInt() * 0.0000001);
+            position.setSpeed(UnitsConverter.knotsFromCps(buf.readUnsignedShort()));
+            position.setCourse(buf.readUnsignedByte() * 2);
+            position.setAltitude(buf.readShort());
 
-            if (channel != null) {
-                ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
-                response.writeByte(0x02); response.writeByte(0x55); // header
-                response.writeByte(MSG_HELLO_RESPONSE);
-                response.writeShort(4 + 4);
-                response.writeInt((int) (System.currentTimeMillis() / 1000));
-                response.writeInt(deviceSession != null ? 0 : 1); // flags
-                channel.write(response);
-            }
+            buf.readUnsignedShort(); // position accuracy
+            buf.readUnsignedByte(); // speed accuracy
 
-        } else if (type == MSG_COMMIT) {
+            position.set(Position.KEY_EVENT, buf.readUnsignedByte());
 
-            if (channel != null) {
-                ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
-                response.writeByte(0x02); response.writeByte(0x55); // header
-                response.writeByte(MSG_COMMIT_RESPONSE);
-                response.writeShort(1);
-                response.writeByte(1); // flags (success)
-                channel.write(response);
-            }
+            position.setValid(BitUtil.check(buf.readByte(), 0));
 
-        } else if (type == MSG_DATA_RECORD) {
+            position.set(Position.KEY_INPUT, buf.readUnsignedInt());
+            position.set(Position.KEY_OUTPUT, buf.readUnsignedShort());
 
-            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
-            if (deviceSession == null) {
-                return null;
+            for (int i = 1; i <= 5; i++) {
+                position.set(Position.PREFIX_ADC + i, buf.readShort());
             }
 
-            List<Position> positions = new LinkedList<>();
+            position.set(Position.KEY_DEVICE_TEMP, buf.readByte());
 
-            while (buf.readable()) {
+            buf.readShort(); // accelerometer x
+            buf.readShort(); // accelerometer y
+            buf.readShort(); // accelerometer z
 
-                int recordEnd = buf.readerIndex() + buf.readUnsignedShort();
+            buf.skipBytes(8); // device id
 
-                Position position = new Position();
-                position.setProtocol(getProtocolName());
-                position.setDeviceId(deviceSession.getDeviceId());
+            position.set(Position.KEY_PDOP, buf.readUnsignedShort() * 0.01);
 
-                position.set(Position.KEY_INDEX, buf.readUnsignedInt());
+            buf.skipBytes(2); // reserved
 
-                position.setDeviceTime(new Date(1356998400000L + buf.readUnsignedInt() * 1000)); // since 1 Jan 2013
+            buf.readUnsignedShort(); // checksum
 
-                position.set(Position.KEY_EVENT, buf.readUnsignedByte());
+            positions.add(position);
+        }
 
-                while (buf.readerIndex() < recordEnd) {
+        return positions;
+    }
 
-                    int fieldId = buf.readUnsignedByte();
-                    int fieldLength = buf.readUnsignedByte();
-                    int fieldEnd = buf.readerIndex() + (fieldLength == 255 ? buf.readUnsignedShort() : fieldLength);
+    private List<Position> decodeStandard(Channel channel, SocketAddress remoteAddress, ChannelBuffer buf) {
 
-                    if (fieldId == 0) {
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
 
-                        position.setFixTime(new Date(1356998400000L + buf.readUnsignedInt() * 1000));
-                        position.setLatitude(buf.readInt() * 0.0000001);
-                        position.setLongitude(buf.readInt() * 0.0000001);
-                        position.setAltitude(buf.readShort());
-                        position.setSpeed(UnitsConverter.knotsFromCps(buf.readUnsignedShort()));
+        List<Position> positions = new LinkedList<>();
 
-                        buf.readUnsignedByte(); // speed accuracy
+        while (buf.readable()) {
+            int recordEnd = buf.readerIndex() + buf.readUnsignedShort();
 
-                        position.setCourse(buf.readUnsignedByte() * 2);
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
 
-                        position.set(Position.KEY_PDOP, buf.readUnsignedByte() * 0.1);
+            position.set(Position.KEY_INDEX, buf.readUnsignedInt());
 
-                        position.setAccuracy(buf.readUnsignedByte());
-                        position.setValid(buf.readUnsignedByte() != 0);
+            position.setDeviceTime(new Date(1356998400000L + buf.readUnsignedInt() * 1000)); // since 1 Jan 2013
 
-                    } else if (fieldId == 2) {
+            position.set(Position.KEY_EVENT, buf.readUnsignedByte());
 
-                        int input = buf.readInt();
-                        int output = buf.readUnsignedShort();
-                        int status = buf.readUnsignedShort();
+            while (buf.readerIndex() < recordEnd) {
 
-                        position.set(Position.KEY_IGNITION, BitUtil.check(input, 0));
+                int fieldId = buf.readUnsignedByte();
+                int fieldLength = buf.readUnsignedByte();
+                int fieldEnd = buf.readerIndex() + (fieldLength == 255 ? buf.readUnsignedShort() : fieldLength);
 
-                        position.set(Position.KEY_INPUT, input);
-                        position.set(Position.KEY_OUTPUT, output);
-                        position.set(Position.KEY_STATUS, status);
+                if (fieldId == 0) {
 
-                    } else if (fieldId == 6) {
+                    position.setFixTime(new Date(1356998400000L + buf.readUnsignedInt() * 1000));
+                    position.setLatitude(buf.readInt() * 0.0000001);
+                    position.setLongitude(buf.readInt() * 0.0000001);
+                    position.setAltitude(buf.readShort());
+                    position.setSpeed(UnitsConverter.knotsFromCps(buf.readUnsignedShort()));
 
-                        while (buf.readerIndex() < fieldEnd) {
-                            switch (buf.readUnsignedByte()) {
-                                case 1:
-                                    position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.001);
-                                    break;
-                                case 2:
-                                    position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.01);
-                                    break;
-                                case 3:
-                                    position.set(Position.KEY_DEVICE_TEMP, buf.readShort() * 0.01);
-                                    break;
-                                case 4:
-                                    position.set(Position.KEY_RSSI, buf.readUnsignedShort());
-                                    break;
-                                case 5:
-                                    position.set("solarPower", buf.readUnsignedShort() * 0.001);
-                                    break;
-                                default:
-                                    break;
-                            }
-                        }
+                    buf.readUnsignedByte(); // speed accuracy
 
-                    }
+                    position.setCourse(buf.readUnsignedByte() * 2);
 
-                    buf.readerIndex(fieldEnd);
+                    position.set(Position.KEY_PDOP, buf.readUnsignedByte() * 0.1);
 
-                }
+                    position.setAccuracy(buf.readUnsignedByte());
+                    position.setValid(buf.readUnsignedByte() != 0);
+
+                } else if (fieldId == 2) {
+
+                    int input = buf.readInt();
+                    int output = buf.readUnsignedShort();
+                    int status = buf.readUnsignedShort();
+
+                    position.set(Position.KEY_IGNITION, BitUtil.check(input, 0));
+
+                    position.set(Position.KEY_INPUT, input);
+                    position.set(Position.KEY_OUTPUT, output);
+                    position.set(Position.KEY_STATUS, status);
+
+                } else if (fieldId == 6) {
+
+                    while (buf.readerIndex() < fieldEnd) {
+                        switch (buf.readUnsignedByte()) {
+                            case 1:
+                                position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.001);
+                                break;
+                            case 2:
+                                position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.01);
+                                break;
+                            case 3:
+                                position.set(Position.KEY_DEVICE_TEMP, buf.readShort() * 0.01);
+                                break;
+                            case 4:
+                                position.set(Position.KEY_RSSI, buf.readUnsignedShort());
+                                break;
+                            case 5:
+                                position.set("solarPower", buf.readUnsignedShort() * 0.001);
+                                break;
+                            default:
+                                break;
+                        }
+                    }
 
-                if (position.getFixTime() == null) {
-                    getLastLocation(position, position.getDeviceTime());
                 }
 
-                positions.add(position);
+                buf.readerIndex(fieldEnd);
+
+            }
 
+            if (position.getFixTime() == null) {
+                getLastLocation(position, position.getDeviceTime());
             }
 
-            return positions;
+            positions.add(position);
+        }
+
+        return positions;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ChannelBuffer buf = (ChannelBuffer) msg;
+
+        buf.skipBytes(2); // header
+
+        int type = buf.readUnsignedByte();
+        int length = buf.readUnsignedShort();
+
+        if (type == MSG_HELLO) {
+
+            buf.readUnsignedInt(); // device serial number
+
+            DeviceSession deviceSession = getDeviceSession(
+                    channel, remoteAddress, buf.readBytes(15).toString(StandardCharsets.US_ASCII));
+
+            ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+            if (length == 51) {
+                response.writeByte(0); // reserved
+                response.writeInt(0); // reserved
+            } else {
+                response.writeInt((int) ((System.currentTimeMillis() - 1356998400000L) / 1000));
+                response.writeInt(deviceSession != null ? 0 : 1); // flags
+            }
+
+            sendResponse(channel, MSG_HELLO_RESPONSE, response);
+
+        } else if (type == MSG_COMMIT) {
+
+            ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+            response.writeByte(1); // flags (success)
+            sendResponse(channel, MSG_COMMIT_RESPONSE, response);
+
+        } else if (type == MSG_CANNED_REQUEST_1) {
+
+            ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+            response.writeBytes(new byte[12]);
+            sendResponse(channel, MSG_CANNED_RESPONSE_1, response);
+
+        } else if (type == MSG_CANNED_REQUEST_2) {
+
+            sendResponse(channel, MSG_CANNED_RESPONSE_2, null);
+
+        } else if (type == MSG_DATA_RECORD_64) {
+
+            return decodeFixed64(channel, remoteAddress, buf);
+
+        } else if (type == MSG_DATA_RECORD) {
+
+            return decodeStandard(channel, remoteAddress, buf);
 
         }
 
diff --git a/src/org/traccar/protocol/DwayProtocolDecoder.java b/src/org/traccar/protocol/DwayProtocolDecoder.java
index 121681588..8ddd62b83 100644
--- a/src/org/traccar/protocol/DwayProtocolDecoder.java
+++ b/src/org/traccar/protocol/DwayProtocolDecoder.java
@@ -76,8 +76,7 @@ public class DwayProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.setValid(true);
diff --git a/src/org/traccar/protocol/EasyTrackProtocolDecoder.java b/src/org/traccar/protocol/EasyTrackProtocolDecoder.java
index 799254b65..16ced37ae 100644
--- a/src/org/traccar/protocol/EasyTrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/EasyTrackProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -54,6 +54,31 @@ public class EasyTrackProtocolDecoder extends BaseProtocolDecoder {
             .any()
             .compile();
 
+    private String decodeAlarm(long status) {
+        if ((status & 0x02000000) > 0) {
+            return Position.ALARM_GEOFENCE_ENTER;
+        }
+        if ((status & 0x04000000) > 0) {
+            return Position.ALARM_GEOFENCE_EXIT;
+        }
+        if ((status & 0x08000000) > 0) {
+            return Position.ALARM_LOW_BATTERY;
+        }
+        if ((status & 0x20000000) > 0) {
+            return Position.ALARM_VIBRATION;
+        }
+        if ((status & 0x80000000) > 0) {
+            return Position.ALARM_OVERSPEED;
+        }
+        if ((status & 0x00010000) > 0) {
+            return Position.ALARM_SOS;
+        }
+        if ((status & 0x00040000) > 0) {
+            return Position.ALARM_POWER_CUT;
+        }
+        return null;
+    }
+
     @Override
     protected Object decode(
             Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
@@ -63,8 +88,7 @@ public class EasyTrackProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
@@ -96,7 +120,10 @@ public class EasyTrackProtocolDecoder extends BaseProtocolDecoder {
         position.setSpeed(UnitsConverter.knotsFromKph(parser.nextHexInt(0) / 100.0));
         position.setCourse(parser.nextHexInt(0) / 100.0);
 
-        position.set(Position.KEY_STATUS, parser.next());
+        long status = parser.nextHexLong();
+        position.set(Position.KEY_STATUS, status);
+        position.set(Position.KEY_ALARM, decodeAlarm(status));
+
         position.set("signal", parser.next());
         position.set(Position.KEY_POWER, parser.nextDouble(0));
         position.set("oil", parser.nextHexInt(0));
diff --git a/src/org/traccar/protocol/EelinkProtocolDecoder.java b/src/org/traccar/protocol/EelinkProtocolDecoder.java
index 98a9f7d6d..0ed81c925 100644
--- a/src/org/traccar/protocol/EelinkProtocolDecoder.java
+++ b/src/org/traccar/protocol/EelinkProtocolDecoder.java
@@ -115,9 +115,8 @@ public class EelinkProtocolDecoder extends BaseProtocolDecoder {
 
     private Position decodeOld(DeviceSession deviceSession, ChannelBuffer buf, int type, int index) {
 
-        Position position = new Position();
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
-        position.setProtocol(getProtocolName());
 
         position.set(Position.KEY_INDEX, index);
 
@@ -173,9 +172,8 @@ public class EelinkProtocolDecoder extends BaseProtocolDecoder {
 
     private Position decodeNew(DeviceSession deviceSession, ChannelBuffer buf, int index) {
 
-        Position position = new Position();
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
-        position.setProtocol(getProtocolName());
 
         position.set(Position.KEY_INDEX, index);
 
@@ -282,9 +280,8 @@ public class EelinkProtocolDecoder extends BaseProtocolDecoder {
 
     private Position decodeResult(DeviceSession deviceSession, ChannelBuffer buf, int index) {
 
-        Position position = new Position();
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
-        position.setProtocol(getProtocolName());
 
         position.set(Position.KEY_INDEX, index);
 
@@ -362,9 +359,8 @@ public class EelinkProtocolDecoder extends BaseProtocolDecoder {
 
             } else if (type == MSG_HEARTBEAT && buf.readableBytes() >= 2) {
 
-                Position position = new Position();
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
-                position.setProtocol(getProtocolName());
 
                 getLastLocation(position, null);
 
diff --git a/src/org/traccar/protocol/EelinkProtocolEncoder.java b/src/org/traccar/protocol/EelinkProtocolEncoder.java
index 76865a039..4d2d86e68 100644
--- a/src/org/traccar/protocol/EelinkProtocolEncoder.java
+++ b/src/org/traccar/protocol/EelinkProtocolEncoder.java
@@ -18,10 +18,10 @@ package org.traccar.protocol;
 import org.jboss.netty.buffer.ChannelBuffer;
 import org.jboss.netty.buffer.ChannelBuffers;
 import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.Log;
 import org.traccar.model.Command;
 
-import javax.xml.bind.DatatypeConverter;
 import java.nio.ByteBuffer;
 import java.nio.charset.StandardCharsets;
 
@@ -47,7 +47,7 @@ public class EelinkProtocolEncoder extends BaseProtocolEncoder {
         ChannelBuffer buf = ChannelBuffers.dynamicBuffer();
 
         if (connectionless) {
-            buf.writeBytes(ChannelBuffers.wrappedBuffer(DatatypeConverter.parseHexBinary('0' + uniqueId)));
+            buf.writeBytes(ChannelBuffers.wrappedBuffer(DataConverter.parseHex('0' + uniqueId)));
         }
 
         buf.writeByte(0x67);
diff --git a/src/org/traccar/protocol/EgtsFrameDecoder.java b/src/org/traccar/protocol/EgtsFrameDecoder.java
new file mode 100644
index 000000000..71ffc1811
--- /dev/null
+++ b/src/org/traccar/protocol/EgtsFrameDecoder.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.frame.FrameDecoder;
+
+public class EgtsFrameDecoder extends FrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ChannelBuffer buf) throws Exception {
+
+        if (buf.readableBytes() < 10) {
+            return null;
+        }
+
+        int headerLength = buf.getUnsignedByte(buf.readerIndex() + 3);
+        int frameLength = buf.getUnsignedShort(buf.readerIndex() + 5);
+
+        int length = headerLength + frameLength + (frameLength > 0 ? 2 : 0);
+
+        if (buf.readableBytes() >= length) {
+            return buf.readBytes(length);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/org/traccar/protocol/EgtsProtocol.java b/src/org/traccar/protocol/EgtsProtocol.java
new file mode 100644
index 000000000..13ec6c9a7
--- /dev/null
+++ b/src/org/traccar/protocol/EgtsProtocol.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.jboss.netty.bootstrap.ServerBootstrap;
+import org.jboss.netty.channel.ChannelPipeline;
+import org.traccar.BaseProtocol;
+import org.traccar.TrackerServer;
+
+import java.nio.ByteOrder;
+import java.util.List;
+
+public class EgtsProtocol extends BaseProtocol {
+
+    public EgtsProtocol() {
+        super("egts");
+    }
+
+    @Override
+    public void initTrackerServers(List<TrackerServer> serverList) {
+        TrackerServer server = new TrackerServer(new ServerBootstrap(), getName()) {
+            @Override
+            protected void addSpecificHandlers(ChannelPipeline pipeline) {
+                pipeline.addLast("frameDecoder", new EgtsFrameDecoder());
+                pipeline.addLast("objectDecoder", new EgtsProtocolDecoder(EgtsProtocol.this));
+            }
+        };
+        server.setEndianness(ByteOrder.LITTLE_ENDIAN);
+        serverList.add(server);
+    }
+
+}
diff --git a/src/org/traccar/protocol/EgtsProtocolDecoder.java b/src/org/traccar/protocol/EgtsProtocolDecoder.java
new file mode 100644
index 000000000..420701e6c
--- /dev/null
+++ b/src/org/traccar/protocol/EgtsProtocolDecoder.java
@@ -0,0 +1,256 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.jboss.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.ByteOrder;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class EgtsProtocolDecoder extends BaseProtocolDecoder {
+
+    public EgtsProtocolDecoder(EgtsProtocol protocol) {
+        super(protocol);
+    }
+
+    public static final int PT_RESPONSE = 0;
+    public static final int PT_APPDATA = 1;
+    public static final int PT_SIGNED_APPDATA = 2;
+
+    public static final int SERVICE_AUTH = 1;
+    public static final int SERVICE_TELEDATA = 2;
+    public static final int SERVICE_COMMANDS = 4;
+    public static final int SERVICE_FIRMWARE = 9;
+    public static final int SERVICE_ECALL = 10;
+
+    public static final int MSG_RECORD_RESPONSE = 0;
+    public static final int MSG_TERM_IDENTITY = 1;
+    public static final int MSG_MODULE_DATA = 2;
+    public static final int MSG_VEHICLE_DATA = 3;
+    public static final int MSG_AUTH_PARAMS = 4;
+    public static final int MSG_AUTH_INFO = 5;
+    public static final int MSG_SERVICE_INFO = 6;
+    public static final int MSG_RESULT_CODE = 7;
+    public static final int MSG_POS_DATA = 16;
+    public static final int MSG_EXT_POS_DATA = 17;
+    public static final int MSG_AD_SENSORS_DATA = 18;
+    public static final int MSG_COUNTERS_DATA = 19;
+    public static final int MSG_STATE_DATA = 20;
+    public static final int MSG_LOOPIN_DATA = 22;
+    public static final int MSG_ABS_DIG_SENS_DATA = 23;
+    public static final int MSG_ABS_AN_SENS_DATA = 24;
+    public static final int MSG_ABS_CNTR_DATA = 25;
+    public static final int MSG_ABS_LOOPIN_DATA = 26;
+    public static final int MSG_LIQUID_LEVEL_SENSOR = 27;
+    public static final int MSG_PASSENGERS_COUNTERS  = 28;
+
+    private int packetId;
+
+    private void sendResponse(
+            Channel channel, int packetType, int index, int serviceType, int type, ChannelBuffer content) {
+        if (channel != null) {
+
+            ChannelBuffer data = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+            data.writeByte(type);
+            data.writeShort(content.readableBytes());
+            data.writeBytes(content);
+
+            ChannelBuffer record = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+            record.writeShort(data.readableBytes());
+            record.writeShort(index);
+            record.writeByte(1 << 6); // flags
+            record.writeByte(serviceType);
+            record.writeByte(serviceType);
+            record.writeBytes(data);
+            int recordChecksum = Checksum.crc16(Checksum.CRC16_CCITT_FALSE, record.toByteBuffer());
+
+            ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+            response.writeByte(1); // protocol version
+            response.writeByte(0); // security key id
+            response.writeByte(0); // flags
+            response.writeByte(5 + 2 + 2 + 2); // header length
+            response.writeByte(0); // encoding
+            response.writeShort(record.readableBytes());
+            response.writeShort(packetId++);
+            response.writeByte(packetType);
+            response.writeByte(Checksum.crc8(Checksum.CRC8_EGTS, response.toByteBuffer()));
+            response.writeBytes(record);
+            response.writeShort(recordChecksum);
+
+            channel.write(response);
+
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ChannelBuffer buf = (ChannelBuffer) msg;
+
+        buf.skipBytes(buf.getUnsignedByte(buf.readerIndex() + 3));
+
+        List<Position> positions = new LinkedList<>();
+
+        while (buf.readableBytes() > 2) {
+
+            int length = buf.readUnsignedShort();
+            int index = buf.readUnsignedShort();
+            int recordFlags = buf.readUnsignedByte();
+
+            if (BitUtil.check(recordFlags, 0)) {
+                buf.readUnsignedInt(); // object id
+            }
+
+            if (BitUtil.check(recordFlags, 1)) {
+                buf.readUnsignedInt(); // event id
+            }
+            if (BitUtil.check(recordFlags, 2)) {
+                buf.readUnsignedInt(); // time
+            }
+
+            int serviceType = buf.readUnsignedByte();
+            buf.readUnsignedByte(); // recipient service type
+
+            int recordEnd = buf.readerIndex() + length;
+
+            Position position = new Position(getProtocolName());
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession != null) {
+                position.setDeviceId(deviceSession.getDeviceId());
+            }
+
+            ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+            response.writeShort(index);
+            response.writeByte(0); // success
+            sendResponse(channel, PT_RESPONSE, index, serviceType, MSG_RECORD_RESPONSE, response);
+
+            while (buf.readerIndex() < recordEnd) {
+                int type = buf.readUnsignedByte();
+                int end = buf.readUnsignedShort() + buf.readerIndex();
+
+                if (type == MSG_TERM_IDENTITY) {
+
+                    buf.readUnsignedInt(); // object id
+                    int flags = buf.readUnsignedByte();
+
+                    if (BitUtil.check(flags, 0)) {
+                        buf.readUnsignedShort(); // home dispatcher identifier
+                    }
+                    if (BitUtil.check(flags, 1)) {
+                        getDeviceSession(
+                                channel, remoteAddress, buf.readBytes(15).toString(StandardCharsets.US_ASCII).trim());
+                    }
+                    if (BitUtil.check(flags, 2)) {
+                        getDeviceSession(
+                                channel, remoteAddress, buf.readBytes(16).toString(StandardCharsets.US_ASCII).trim());
+                    }
+                    if (BitUtil.check(flags, 3)) {
+                        buf.skipBytes(3); // language identifier
+                    }
+                    if (BitUtil.check(flags, 5)) {
+                        buf.skipBytes(3); // network identifier
+                    }
+                    if (BitUtil.check(flags, 6)) {
+                        buf.readUnsignedShort(); // buffer size
+                    }
+                    if (BitUtil.check(flags, 7)) {
+                        getDeviceSession(
+                                channel, remoteAddress, buf.readBytes(15).toString(StandardCharsets.US_ASCII).trim());
+                    }
+
+                    response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+                    response.writeByte(0); // success
+                    sendResponse(channel, PT_APPDATA, index, serviceType, MSG_RESULT_CODE, response);
+
+                } else if (type == MSG_POS_DATA) {
+
+                    position.setTime(new Date((buf.readUnsignedInt() + 1262304000) * 1000)); // since 2010-01-01
+                    position.setLatitude(buf.readUnsignedInt() * 90.0 / 0xFFFFFFFFL);
+                    position.setLongitude(buf.readUnsignedInt() * 180.0 / 0xFFFFFFFFL);
+
+                    int flags = buf.readUnsignedByte();
+                    position.setValid(BitUtil.check(flags, 0));
+                    if (BitUtil.check(flags, 5)) {
+                        position.setLatitude(-position.getLatitude());
+                    }
+                    if (BitUtil.check(flags, 6)) {
+                        position.setLongitude(-position.getLongitude());
+                    }
+
+                    int speed = buf.readUnsignedShort();
+                    position.setSpeed(UnitsConverter.knotsFromKph(BitUtil.to(speed, 14) * 0.1));
+                    position.setCourse(buf.readUnsignedByte() + (BitUtil.check(speed, 15) ? 0x100 : 0));
+
+                    position.set(Position.KEY_ODOMETER, buf.readUnsignedMedium() * 100);
+                    position.set(Position.KEY_INPUT, buf.readUnsignedByte());
+                    position.set(Position.KEY_EVENT, buf.readUnsignedByte());
+
+                    if (BitUtil.check(flags, 7)) {
+                        position.setAltitude(buf.readMedium());
+                    }
+
+                } else if (type == MSG_EXT_POS_DATA) {
+
+                    int flags = buf.readUnsignedByte();
+
+                    if (BitUtil.check(flags, 0)) {
+                        position.set(Position.KEY_VDOP, buf.readUnsignedShort());
+                    }
+                    if (BitUtil.check(flags, 1)) {
+                        position.set(Position.KEY_HDOP, buf.readUnsignedShort());
+                    }
+                    if (BitUtil.check(flags, 2)) {
+                        position.set(Position.KEY_PDOP, buf.readUnsignedShort());
+                    }
+                    if (BitUtil.check(flags, 3)) {
+                        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+                    }
+
+                } else if (type == MSG_AD_SENSORS_DATA) {
+
+                    buf.readUnsignedByte(); // inputs flags
+
+                    position.set(Position.KEY_OUTPUT, buf.readUnsignedByte());
+
+                    buf.readUnsignedByte(); // adc flags
+
+                }
+
+                buf.readerIndex(end);
+            }
+
+            if (serviceType == SERVICE_TELEDATA && deviceSession != null) {
+                positions.add(position);
+            }
+        }
+
+        return positions.isEmpty() ? null : positions;
+    }
+
+}
diff --git a/src/org/traccar/protocol/EnforaProtocolDecoder.java b/src/org/traccar/protocol/EnforaProtocolDecoder.java
index f0b79aa1f..c5500c3b3 100644
--- a/src/org/traccar/protocol/EnforaProtocolDecoder.java
+++ b/src/org/traccar/protocol/EnforaProtocolDecoder.java
@@ -95,8 +95,7 @@ public class EnforaProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
diff --git a/src/org/traccar/protocol/EskyProtocolDecoder.java b/src/org/traccar/protocol/EskyProtocolDecoder.java
index b509d821f..60ef4f846 100644
--- a/src/org/traccar/protocol/EskyProtocolDecoder.java
+++ b/src/org/traccar/protocol/EskyProtocolDecoder.java
@@ -65,8 +65,7 @@ public class EskyProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.set(Position.KEY_SATELLITES, parser.nextInt());
diff --git a/src/org/traccar/protocol/ExtremTracProtocolDecoder.java b/src/org/traccar/protocol/ExtremTracProtocolDecoder.java
index 79e3306df..553720f1e 100644
--- a/src/org/traccar/protocol/ExtremTracProtocolDecoder.java
+++ b/src/org/traccar/protocol/ExtremTracProtocolDecoder.java
@@ -61,8 +61,7 @@ public class ExtremTracProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
diff --git a/src/org/traccar/protocol/FifotrackProtocolDecoder.java b/src/org/traccar/protocol/FifotrackProtocolDecoder.java
index 304f6a2c3..cb7a23315 100644
--- a/src/org/traccar/protocol/FifotrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/FifotrackProtocolDecoder.java
@@ -78,8 +78,7 @@ public class FifotrackProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.set(Position.KEY_ALARM, parser.next());
diff --git a/src/org/traccar/protocol/FlespiProtocolDecoder.java b/src/org/traccar/protocol/FlespiProtocolDecoder.java
index 6cba234e5..526e10fa2 100644
--- a/src/org/traccar/protocol/FlespiProtocolDecoder.java
+++ b/src/org/traccar/protocol/FlespiProtocolDecoder.java
@@ -60,9 +60,8 @@ public class FlespiProtocolDecoder extends BaseHttpProtocolDecoder {
             if (deviceSession == null) {
                 continue;
             }
-            Position position = new Position();
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
-            position.setProtocol(getProtocolName());
             decodePosition(message, position);
             positions.add(position);
         }
@@ -124,7 +123,7 @@ public class FlespiProtocolDecoder extends BaseHttpProtocolDecoder {
                 return true;
             case "din":
             case "dout":
-                position.set((name.equals("din") ? Position.KEY_INPUT : Position.KEY_OUTPUT),
+                position.set(name.equals("din") ? Position.KEY_INPUT : Position.KEY_OUTPUT,
                         ((JsonNumber) value).intValue());
                 return true;
             case "gps.vehicle.mileage":
diff --git a/src/org/traccar/protocol/FlexCommProtocolDecoder.java b/src/org/traccar/protocol/FlexCommProtocolDecoder.java
index f401145b9..8bd4dcee0 100644
--- a/src/org/traccar/protocol/FlexCommProtocolDecoder.java
+++ b/src/org/traccar/protocol/FlexCommProtocolDecoder.java
@@ -78,8 +78,7 @@ public class FlexCommProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         position.set(Position.KEY_STATUS, parser.nextInt());
 
diff --git a/src/org/traccar/protocol/FlextrackProtocolDecoder.java b/src/org/traccar/protocol/FlextrackProtocolDecoder.java
index ab2e4d24c..8f7525147 100644
--- a/src/org/traccar/protocol/FlextrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/FlextrackProtocolDecoder.java
@@ -103,8 +103,7 @@ public class FlextrackProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             sendAcknowledgement(channel, parser.next());
diff --git a/src/org/traccar/protocol/FoxProtocolDecoder.java b/src/org/traccar/protocol/FoxProtocolDecoder.java
index 9b2cf0e1d..16f8fce27 100644
--- a/src/org/traccar/protocol/FoxProtocolDecoder.java
+++ b/src/org/traccar/protocol/FoxProtocolDecoder.java
@@ -88,8 +88,7 @@ public class FoxProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             position.set(Position.KEY_STATUS, parser.nextInt(0));
diff --git a/src/org/traccar/protocol/FreedomProtocolDecoder.java b/src/org/traccar/protocol/FreedomProtocolDecoder.java
index 56b6b9e19..28456c617 100644
--- a/src/org/traccar/protocol/FreedomProtocolDecoder.java
+++ b/src/org/traccar/protocol/FreedomProtocolDecoder.java
@@ -53,8 +53,7 @@ public class FreedomProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/GalileoProtocolDecoder.java b/src/org/traccar/protocol/GalileoProtocolDecoder.java
index 3944b37de..d8a1651bb 100644
--- a/src/org/traccar/protocol/GalileoProtocolDecoder.java
+++ b/src/org/traccar/protocol/GalileoProtocolDecoder.java
@@ -20,6 +20,7 @@ import org.jboss.netty.buffer.ChannelBuffers;
 import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
 import org.traccar.DeviceSession;
+import org.traccar.helper.UnitsConverter;
 import org.traccar.model.Position;
 
 import java.net.SocketAddress;
@@ -117,7 +118,7 @@ public class GalileoProtocolDecoder extends BaseProtocolDecoder {
                 position.setTime(new Date(buf.readUnsignedInt() * 1000));
                 break;
             case 0x33:
-                position.setSpeed(buf.readUnsignedShort() * 0.0539957);
+                position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort() * 0.1));
                 position.setCourse(buf.readUnsignedShort() * 0.1);
                 break;
             case 0x34:
@@ -248,11 +249,10 @@ public class GalileoProtocolDecoder extends BaseProtocolDecoder {
         boolean hasLocation = false;
 
         DeviceSession deviceSession = null;
-        Position position = new Position();
+        Position position = new Position(getProtocolName());
 
         while (buf.readerIndex() < length) {
 
-            // Check if new message started
             int tag = buf.readUnsignedByte();
             if (tags.contains(tag)) {
                 if (hasLocation && position.getFixTime() != null) {
@@ -260,7 +260,7 @@ public class GalileoProtocolDecoder extends BaseProtocolDecoder {
                 }
                 tags.clear();
                 hasLocation = false;
-                position = new Position();
+                position = new Position(getProtocolName()); // new position starts
             }
             tags.add(tag);
 
@@ -278,13 +278,6 @@ public class GalileoProtocolDecoder extends BaseProtocolDecoder {
 
         }
 
-        if (hasLocation && position.getFixTime() != null) {
-            positions.add(position);
-        } else if (position.getAttributes().containsKey(Position.KEY_RESULT)) {
-            getLastLocation(position, null);
-            positions.add(position);
-        }
-
         if (deviceSession == null) {
             deviceSession = getDeviceSession(channel, remoteAddress);
             if (deviceSession == null) {
@@ -292,10 +285,17 @@ public class GalileoProtocolDecoder extends BaseProtocolDecoder {
             }
         }
 
+        if (hasLocation && position.getFixTime() != null) {
+            positions.add(position);
+        } else if (position.getAttributes().containsKey(Position.KEY_RESULT)) {
+            position.setDeviceId(deviceSession.getDeviceId());
+            getLastLocation(position, null);
+            positions.add(position);
+        }
+
         sendReply(channel, buf.readUnsignedShort());
 
         for (Position p : positions) {
-            p.setProtocol(getProtocolName());
             p.setDeviceId(deviceSession.getDeviceId());
         }
 
diff --git a/src/org/traccar/protocol/GatorProtocolDecoder.java b/src/org/traccar/protocol/GatorProtocolDecoder.java
index 2ad4be3d3..9cd746f51 100644
--- a/src/org/traccar/protocol/GatorProtocolDecoder.java
+++ b/src/org/traccar/protocol/GatorProtocolDecoder.java
@@ -90,8 +90,7 @@ public class GatorProtocolDecoder extends BaseProtocolDecoder {
         if (type == MSG_POSITION_DATA || type == MSG_ROLLCALL_RESPONSE
                 || type == MSG_ALARM_DATA || type == MSG_BLIND_AREA) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
 
             DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, "1" + id, id);
             if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/GenxProtocolDecoder.java b/src/org/traccar/protocol/GenxProtocolDecoder.java
index 3b38227dc..d4a348ce1 100644
--- a/src/org/traccar/protocol/GenxProtocolDecoder.java
+++ b/src/org/traccar/protocol/GenxProtocolDecoder.java
@@ -48,8 +48,7 @@ public class GenxProtocolDecoder extends BaseProtocolDecoder {
 
         String[] values = ((String) msg).split(",");
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setValid(true);
 
         for (int i = 0; i < Math.min(values.length, reportColumns.length); i++) {
diff --git a/src/org/traccar/protocol/Gl100ProtocolDecoder.java b/src/org/traccar/protocol/Gl100ProtocolDecoder.java
index 945edfff0..405090695 100644
--- a/src/org/traccar/protocol/Gl100ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gl100ProtocolDecoder.java
@@ -72,8 +72,7 @@ public class Gl100ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/Gl200BinaryProtocolDecoder.java b/src/org/traccar/protocol/Gl200BinaryProtocolDecoder.java
index 071960e49..ba3baaa75 100644
--- a/src/org/traccar/protocol/Gl200BinaryProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gl200BinaryProtocolDecoder.java
@@ -108,8 +108,7 @@ public class Gl200BinaryProtocolDecoder extends BaseProtocolDecoder {
                     time += 1;
                 }
 
-                Position position = new Position();
-                position.setProtocol(getProtocolName());
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
 
                 switch (BitUtil.from(buf.getUnsignedByte(buf.readerIndex()), 8 - 2)) {
@@ -156,8 +155,7 @@ public class Gl200BinaryProtocolDecoder extends BaseProtocolDecoder {
 
             for (int i = 0; i < count; i++) {
 
-                Position position = new Position();
-                position.setProtocol(getProtocolName());
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
 
                 position.set(Position.KEY_BATTERY_LEVEL, battery);
@@ -206,8 +204,7 @@ public class Gl200BinaryProtocolDecoder extends BaseProtocolDecoder {
 
     private Position decodeEvent(Channel channel, SocketAddress remoteAddress, ChannelBuffer buf) {
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         int type = buf.readUnsignedByte();
 
@@ -313,8 +310,7 @@ public class Gl200BinaryProtocolDecoder extends BaseProtocolDecoder {
 
     private Position decodeInformation(Channel channel, SocketAddress remoteAddress, ChannelBuffer buf) {
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         int type = buf.readUnsignedByte();
 
diff --git a/src/org/traccar/protocol/Gl200TextProtocolDecoder.java b/src/org/traccar/protocol/Gl200TextProtocolDecoder.java
index 9429cff2f..ff300d429 100644
--- a/src/org/traccar/protocol/Gl200TextProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gl200TextProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -210,7 +210,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
             .number("(?:[0-9A-Z]{2}xxxx)?,")     // protocol version
             .number("(d{15}|x{14}),")            // imei
             .expression("[^,]*,")                // device name
-            .number("x{8},")                     // mask
+            .number("(x{8}),")                   // mask
             .number("(d+)?,")                    // power
             .number("d{1,2},")                   // report type
             .number("d{1,2},")                   // count
@@ -356,8 +356,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
                     channel.write("+SACK:GTHBD," + protocolVersion + "," + parser.next() + "$", remoteAddress);
                 }
             } else {
-                Position position = new Position();
-                position.setProtocol(getProtocolName());
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
                 getLastLocation(position, parser.nextDateTime());
                 position.setValid(false);
@@ -372,8 +371,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
         if (parser.matches()) {
             DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
             if (deviceSession != null) {
-                Position position = new Position();
-                position.setProtocol(getProtocolName());
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
                 return position;
             }
@@ -431,8 +429,8 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         parser.next(); // odometer or external power
 
-        position.set(Position.KEY_BATTERY, parser.nextDouble(0));
-        position.set(Position.KEY_CHARGE, parser.nextInt(0) == 1);
+        position.set(Position.KEY_BATTERY, parser.nextDouble());
+        position.set(Position.KEY_CHARGE, parser.nextInt() == 1);
 
         position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
 
@@ -446,7 +444,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         getLastLocation(position, parser.nextDateTime());
 
-        position.set(Position.KEY_INDEX, parser.nextHexInt(0));
+        position.set(Position.KEY_INDEX, parser.nextHexInt());
 
         return position;
     }
@@ -459,8 +457,8 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
         }
 
         position.set("deviceType", parser.next());
-        position.set(Position.KEY_VERSION_FW, parser.nextHexInt(0));
-        position.set(Position.KEY_VERSION_HW, parser.nextHexInt(0));
+        position.set(Position.KEY_VERSION_FW, parser.nextHexInt());
+        position.set(Position.KEY_VERSION_HW, parser.nextHexInt());
 
         getLastLocation(position, parser.nextDateTime());
 
@@ -468,8 +466,8 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
     }
 
     private void decodeLocation(Position position, Parser parser) {
-        int hdop = parser.nextInt(0);
-        position.setValid(hdop > 0);
+        Integer hdop = parser.nextInt();
+        position.setValid(hdop == null || hdop > 0);
         position.set(Position.KEY_HDOP, hdop);
 
         position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
@@ -478,25 +476,27 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         if (parser.hasNext(8)) {
             position.setValid(true);
-            position.setLongitude(parser.nextDouble(0));
-            position.setLatitude(parser.nextDouble(0));
+            position.setLongitude(parser.nextDouble());
+            position.setLatitude(parser.nextDouble());
             position.setTime(parser.nextDateTime());
         } else {
             getLastLocation(position, null);
         }
 
         if (parser.hasNext(6)) {
-            int mcc = parser.nextInt(0);
-            int mnc = parser.nextInt(0);
+            int mcc = parser.nextInt();
+            int mnc = parser.nextInt();
             if (parser.hasNext(2)) {
-                position.setNetwork(new Network(CellTower.from(mcc, mnc, parser.nextInt(0), parser.nextInt(0))));
+                position.setNetwork(new Network(CellTower.from(mcc, mnc, parser.nextInt(), parser.nextInt())));
             }
             if (parser.hasNext(2)) {
-                position.setNetwork(new Network(CellTower.from(mcc, mnc, parser.nextHexInt(0), parser.nextHexInt(0))));
+                position.setNetwork(new Network(CellTower.from(mcc, mnc, parser.nextHexInt(), parser.nextHexInt())));
             }
         }
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        }
     }
 
     private Object decodeObd(Channel channel, SocketAddress remoteAddress, String sentence) {
@@ -511,16 +511,22 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
         position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
         position.set(Position.KEY_FUEL_CONSUMPTION, parser.next());
         position.set("dtcsClearedDistance", parser.nextInt());
-        position.set("odbConnect", parser.nextInt(0) == 1);
+        if (parser.hasNext()) {
+            position.set("odbConnect", parser.nextInt() == 1);
+        }
         position.set("dtcsNumber", parser.nextInt());
         position.set("dtcsCodes", parser.next());
         position.set(Position.KEY_THROTTLE, parser.nextInt());
         position.set(Position.KEY_FUEL_LEVEL, parser.nextInt());
-        position.set(Position.KEY_OBD_ODOMETER, parser.nextInt(0) * 1000);
+        if (parser.hasNext()) {
+            position.set(Position.KEY_OBD_ODOMETER, parser.nextInt() * 1000);
+        }
 
         decodeLocation(position, parser);
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        if (parser.hasNext()) {
+            position.set(Position.KEY_OBD_ODOMETER, (int) (parser.nextDouble() * 1000));
+        }
 
         decodeDeviceTime(position, parser);
 
@@ -528,8 +534,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
     }
 
     private Object decodeCan(Channel channel, SocketAddress remoteAddress, String sentence) throws ParseException {
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         int index = 0;
         String[] values = sentence.split(",");
@@ -557,14 +562,14 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
         if (BitUtil.check(reportMask, 3)) {
             position.set("totalFuelConsumption", Double.parseDouble(values[index++]));
         }
-        if (BitUtil.check(reportMask, 5)) {
-            position.set(Position.KEY_RPM, Integer.parseInt(values[index++]));
+        if (BitUtil.check(reportMask, 5) && !values[index++].isEmpty()) {
+            position.set(Position.KEY_RPM, Integer.parseInt(values[index - 1]));
         }
-        if (BitUtil.check(reportMask, 4)) {
-            position.set(Position.KEY_OBD_SPEED, UnitsConverter.knotsFromKph(Integer.parseInt(values[index++])));
+        if (BitUtil.check(reportMask, 4) && !values[index++].isEmpty()) {
+            position.set(Position.KEY_OBD_SPEED, UnitsConverter.knotsFromKph(Integer.parseInt(values[index - 1])));
         }
-        if (BitUtil.check(reportMask, 6)) {
-            position.set(Position.KEY_COOLANT_TEMP, Integer.parseInt(values[index++]));
+        if (BitUtil.check(reportMask, 6) && !values[index++].isEmpty()) {
+            position.set(Position.KEY_COOLANT_TEMP, Integer.parseInt(values[index - 1]));
         }
         if (BitUtil.check(reportMask, 7) && !values[index++].isEmpty()) {
             position.set(Position.KEY_FUEL_CONSUMPTION, Double.parseDouble(values[index - 1].substring(1)));
@@ -652,14 +657,14 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
     private void decodeStatus(Position position, Parser parser) {
         if (parser.hasNext(3)) {
-            int ignition = parser.nextHexInt(0);
+            int ignition = parser.nextHexInt();
             if (BitUtil.check(ignition, 4)) {
                 position.set(Position.KEY_IGNITION, false);
             } else if (BitUtil.check(ignition, 5)) {
                 position.set(Position.KEY_IGNITION, true);
             }
-            position.set(Position.KEY_INPUT, parser.nextHexInt(0));
-            position.set(Position.KEY_OUTPUT, parser.nextHexInt(0));
+            position.set(Position.KEY_INPUT, parser.nextHexInt());
+            position.set(Position.KEY_OUTPUT, parser.nextHexInt());
         }
     }
 
@@ -677,12 +682,11 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
         LinkedList<Position> positions = new LinkedList<>();
 
         String vin = parser.next();
-        int power = parser.nextInt(0);
+        Integer power = parser.nextInt();
 
         Parser itemParser = new Parser(PATTERN_LOCATION, parser.next());
         while (itemParser.find()) {
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             position.set(Position.KEY_VIN, vin);
@@ -696,15 +700,18 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         decodeLocation(position, parser);
 
-        // power value only on some devices
-        if (power > 10) {
-            position.set(Position.KEY_POWER, power);
+        if (power != null && power > 10) {
+            position.set(Position.KEY_POWER, power * 0.001); // only on some devices
         }
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        }
         position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        }
         position.set(Position.KEY_HOURS, parser.next());
         position.set(Position.PREFIX_ADC + 1, parser.next());
         position.set(Position.PREFIX_ADC + 2, parser.next());
@@ -735,14 +742,15 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
+        long mask = parser.nextHexLong();
+
         LinkedList<Position> positions = new LinkedList<>();
 
-        int power = parser.nextInt(0);
+        Integer power = parser.nextInt();
 
         Parser itemParser = new Parser(PATTERN_LOCATION, parser.next());
         while (itemParser.find()) {
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             decodeLocation(position, itemParser);
@@ -754,8 +762,10 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         decodeLocation(position, parser);
 
-        position.set(Position.KEY_POWER, power);
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        if (power != null) {
+            position.set(Position.KEY_POWER, power * 0.001);
+        }
+        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
         position.set(Position.KEY_HOURS, parser.next());
         position.set(Position.PREFIX_ADC + 1, parser.next());
         position.set(Position.PREFIX_ADC + 2, parser.next());
@@ -765,14 +775,37 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         int index = 0;
         String[] data = parser.next().split(",");
-        if (data.length > 1) {
-            int deviceType = Integer.parseInt(data[index++]);
-            if (deviceType == 2) {
-                int deviceCount = Integer.parseInt(data[index++]);
-                for (int i = 1; i <= deviceCount; i++) {
-                    index++; // id
-                    index++; // type
-                    position.set(Position.PREFIX_TEMP + i, (short) Integer.parseInt(data[index++], 16) * 0.0625);
+
+        index += 1; // device type
+
+        if (BitUtil.check(mask, 0)) {
+            index += 1; // digital fuel sensor data
+        }
+
+        if (BitUtil.check(mask, 1)) {
+            int deviceCount = Integer.parseInt(data[index++]);
+            for (int i = 1; i <= deviceCount; i++) {
+                index += 1; // id
+                index += 1; // type
+                if (!data[index++].isEmpty()) {
+                    position.set(Position.PREFIX_TEMP + i, (short) Integer.parseInt(data[index - 1], 16) * 0.0625);
+                }
+            }
+        }
+
+        if (BitUtil.check(mask, 2)) {
+            index += 1; // can data
+        }
+
+        if (BitUtil.check(mask, 3) || BitUtil.check(mask, 4)) {
+            int deviceCount = Integer.parseInt(data[index++]);
+            for (int i = 1; i <= deviceCount; i++) {
+                index += 1; // type
+                if (BitUtil.check(mask, 3)) {
+                    position.set(Position.KEY_FUEL_LEVEL, Double.parseDouble(data[index++]));
+                }
+                if (BitUtil.check(mask, 4)) {
+                    index += 1; // volume
                 }
             }
         }
@@ -796,7 +829,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
         decodeLocation(position, parser);
 
         position.set(Position.KEY_HOURS, parser.next());
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
 
         decodeDeviceTime(position, parser);
 
@@ -814,7 +847,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         decodeLocation(position, parser);
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
 
         decodeDeviceTime(position, parser);
 
@@ -832,7 +865,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         Network network = new Network();
 
-        parser.nextInt(0); // count
+        parser.nextInt(); // count
         Matcher matcher = Pattern.compile("([0-9a-fA-F]{12}),(-?\\d+),,,,").matcher(parser.next());
         while (matcher.find()) {
             String mac = matcher.group(1).replaceAll("(..)", "$1:");
@@ -842,7 +875,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         position.setNetwork(network);
 
-        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt(0));
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
 
         return position;
     }
@@ -880,7 +913,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        int reportType = parser.nextInt(0);
+        int reportType = parser.nextInt();
         if (type.equals("NMR")) {
             position.set(Position.KEY_MOTION, reportType == 1);
         } else if (type.equals("SOS")) {
@@ -889,10 +922,14 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         decodeLocation(position, parser);
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
-        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt(0));
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        }
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        }
 
         decodeDeviceTime(position, parser);
 
@@ -910,7 +947,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        int hdop = parser.nextInt(0);
+        int hdop = parser.nextInt();
         position.setValid(hdop > 0);
         position.set(Position.KEY_HDOP, hdop);
 
@@ -919,8 +956,8 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
         position.setAltitude(parser.nextDouble(0));
 
         if (parser.hasNext(2)) {
-            position.setLongitude(parser.nextDouble(0));
-            position.setLatitude(parser.nextDouble(0));
+            position.setLongitude(parser.nextDouble());
+            position.setLatitude(parser.nextDouble());
         } else {
             getLastLocation(position, null);
         }
@@ -931,7 +968,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         if (parser.hasNext(4)) {
             position.setNetwork(new Network(CellTower.from(
-                    parser.nextInt(0), parser.nextInt(0), parser.nextHexInt(0), parser.nextHexInt(0))));
+                    parser.nextInt(), parser.nextInt(), parser.nextHexInt(), parser.nextHexInt())));
         }
 
         decodeDeviceTime(position, parser);
diff --git a/src/org/traccar/protocol/GlobalSatProtocolDecoder.java b/src/org/traccar/protocol/GlobalSatProtocolDecoder.java
index c45a937d4..4361e0c2f 100644
--- a/src/org/traccar/protocol/GlobalSatProtocolDecoder.java
+++ b/src/org/traccar/protocol/GlobalSatProtocolDecoder.java
@@ -76,8 +76,7 @@ public class GlobalSatProtocolDecoder extends BaseProtocolDecoder {
         }
         String[] values = sentence.split(",");
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         for (int formatIndex = 0, valueIndex = 1; formatIndex < format.length()
                 && valueIndex < values.length; formatIndex++) {
@@ -207,8 +206,7 @@ public class GlobalSatProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/GlobeKeeperProtocol.java b/src/org/traccar/protocol/GlobeKeeperProtocol.java
new file mode 100644
index 000000000..9231c067c
--- /dev/null
+++ b/src/org/traccar/protocol/GlobeKeeperProtocol.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.jboss.netty.bootstrap.ConnectionlessBootstrap;
+import org.jboss.netty.channel.ChannelPipeline;
+import org.jboss.netty.handler.codec.string.StringDecoder;
+import org.jboss.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.TrackerServer;
+
+import java.util.List;
+
+public class GlobeKeeperProtocol extends BaseProtocol {
+
+    public GlobeKeeperProtocol() {
+        super("globekeeper");
+    }
+
+    @Override
+    public void initTrackerServers(List<TrackerServer> serverList) {
+        serverList.add(new TrackerServer(new ConnectionlessBootstrap(), getName()) {
+            @Override
+            protected void addSpecificHandlers(ChannelPipeline pipeline) {
+                pipeline.addLast("stringEncoder", new StringEncoder());
+                pipeline.addLast("stringDecoder", new StringDecoder());
+                pipeline.addLast("objectDecoder", new GlobeKeeperProtocolDecoder(GlobeKeeperProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/org/traccar/protocol/GlobeKeeperProtocolDecoder.java b/src/org/traccar/protocol/GlobeKeeperProtocolDecoder.java
new file mode 100644
index 000000000..c4daf4409
--- /dev/null
+++ b/src/org/traccar/protocol/GlobeKeeperProtocolDecoder.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.jboss.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class GlobeKeeperProtocolDecoder extends BaseProtocolDecoder {
+
+    public GlobeKeeperProtocolDecoder(GlobeKeeperProtocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("(d+);")                     // imei
+            .number("(dddd)-(dd)-(dd) ")         // date
+            .number("(dd):(dd):(dd);")           // time
+            .number("(-?d+,d+);")                // latitude
+            .number("(-?d+,d+);")                // longitude
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime());
+
+        position.setValid(true);
+        position.setLongitude(Double.parseDouble(parser.next().replace(',', '.')));
+        position.setLatitude(Double.parseDouble(parser.next().replace(',', '.')));
+
+        return position;
+    }
+
+}
diff --git a/src/org/traccar/protocol/GnxProtocolDecoder.java b/src/org/traccar/protocol/GnxProtocolDecoder.java
index 2274ec164..b3a636d14 100644
--- a/src/org/traccar/protocol/GnxProtocolDecoder.java
+++ b/src/org/traccar/protocol/GnxProtocolDecoder.java
@@ -80,8 +80,7 @@ public class GnxProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/GoSafeProtocolDecoder.java b/src/org/traccar/protocol/GoSafeProtocolDecoder.java
index 62f6212e2..0fa1934da 100644
--- a/src/org/traccar/protocol/GoSafeProtocolDecoder.java
+++ b/src/org/traccar/protocol/GoSafeProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -45,75 +45,7 @@ public class GoSafeProtocolDecoder extends BaseProtocolDecoder {
             .number("(d+),")                     // imei
             .number("(dd)(dd)(dd)")              // time (hhmmss)
             .number("(dd)(dd)(dd),")             // date (ddmmyy)
-            .expression("(.*)#?")                // data
-            .compile();
-
-    private static final Pattern PATTERN_ITEM = new PatternBuilder()
-            .number("(x+)?,").optional()         // event
-            .groupBegin()
-            .text("SYS:")
-            .expression("[^,]*,")
-            .groupEnd("?")
-            .groupBegin()
-            .text("GPS:")
-            .expression("([AV]);")               // validity
-            .number("(d+);")                     // satellites
-            .number("([NS])(d+.d+);")            // latitude
-            .number("([EW])(d+.d+);")            // longitude
-            .number("(d+)?;")                    // speed
-            .number("(d+);")                     // course
-            .number("(d+);")                     // altitude
-            .number("(d+.d+)")                   // hdop
-            .number(";(d+.d+)").optional()       // vdop
-            .expression(",?")
-            .groupEnd()
-            .groupBegin()
-            .text("GSM:")
-            .number("d*;")                       // registration
-            .number("d*;")                       // gsm signal
-            .number("(d+);")                     // mcc
-            .number("(d+);")                     // mnc
-            .number("(x+);")                     // lac
-            .number("(x+);")                     // cid
-            .number("(-d+)")                     // rssi
-            .expression("[^,]*,?")
-            .groupEnd("?")
-            .groupBegin()
-            .text("COT:")
-            .number("(d+)")                      // odometer
-            .number("(?:;d+:d+:d+)?")            // engine hours
-            .expression(",?")
-            .groupEnd("?")
-            .groupBegin()
-            .text("ADC:")
-            .number("(d+.d+)")                   // power
-            .number("(?:;(d+.d+))?,?")           // battery
-            .groupEnd("?")
-            .groupBegin()
-            .text("DTT:")
-            .number("(x+);")                     // status
-            .number("(x+)?;")                    // io
-            .number("(x+);")                     // geo-fence 0-119
-            .number("(x+);")                     // geo-fence 120-155
-            .number("(x+)")                      // event status
-            .number("(?:;(x+))?,?")              // packet type
-            .groupEnd("?")
-            .groupBegin()
-            .text("ETD:").expression("([^,]+),?")
-            .groupEnd("?")
-            .groupBegin()
-            .text("OBD:")
-            .number("(x+),?")
-            .groupEnd("?")
-            .groupBegin()
-            .text("FUL:").expression("[^,]*,?")
-            .groupEnd("?")
-            .groupBegin()
-            .text("TRU:").expression("[^,]*,?")
-            .groupEnd("?")
-            .groupBegin()
-            .text("TAG:").expression("([^,]+),?")
-            .groupEnd("?")
+            .expression("([^#]*)#?")             // data
             .compile();
 
     private static final Pattern PATTERN_OLD = new PatternBuilder()
@@ -133,71 +65,138 @@ public class GoSafeProtocolDecoder extends BaseProtocolDecoder {
             .any()
             .compile();
 
-    private Position decodePosition(DeviceSession deviceSession, Parser parser, Date time) {
+    private void decodeFragment(Position position, String fragment) {
+        int dataIndex = fragment.indexOf(':');
+        int index = 0;
+        String[] values = fragment.substring(dataIndex + 1).split(";");
+        switch (fragment.substring(0, dataIndex)) {
+            case "GPS":
+                position.setValid(values[index++].equals("A"));
+                position.set(Position.KEY_SATELLITES, Integer.parseInt(values[index++]));
+                position.setLatitude(Double.parseDouble(values[index].substring(1)));
+                if (values[index++].charAt(0) == 'S') {
+                    position.setLatitude(-position.getLatitude());
+                }
+                position.setLongitude(Double.parseDouble(values[index].substring(1)));
+                if (values[index++].charAt(0) == 'W') {
+                    position.setLongitude(-position.getLongitude());
+                }
+                if (!values[index++].isEmpty()) {
+                    position.setSpeed(UnitsConverter.knotsFromKph(Integer.parseInt(values[index - 1])));
+                }
+                position.setCourse(Integer.parseInt(values[index++]));
+                position.setAltitude(Integer.parseInt(values[index++]));
+                if (index < values.length) {
+                    position.set(Position.KEY_HDOP, Double.parseDouble(values[index++]));
+                }
+                if (index < values.length) {
+                    position.set(Position.KEY_VDOP, Double.parseDouble(values[index++]));
+                }
+                break;
+            case "GSM":
+                index += 1; // registration status
+                index += 1; // signal strength
+                position.setNetwork(new Network(CellTower.from(
+                        Integer.parseInt(values[index++]), Integer.parseInt(values[index++]),
+                        Integer.parseInt(values[index++], 16), Integer.parseInt(values[index++], 16),
+                        Integer.parseInt(values[index++]))));
+                break;
+            case "COT":
+                if (index < values.length) {
+                    position.set(Position.KEY_ODOMETER, Integer.parseInt(values[index++]));
+                }
+                if (index < values.length) {
+                    String[] hours = values[index].split("-");
+                    position.set(Position.KEY_HOURS, Integer.parseInt(hours[0])
+                            + Integer.parseInt(hours[0]) / 60.0 + Integer.parseInt(hours[0]) / 3600.0);
+                }
+                break;
+            case "ADC":
+                position.set(Position.KEY_POWER, Double.parseDouble(values[index++]));
+                if (index < values.length) {
+                    position.set(Position.KEY_BATTERY, Double.parseDouble(values[index++]));
+                }
+                if (index < values.length) {
+                    position.set(Position.PREFIX_ADC + 1, Double.parseDouble(values[index++]));
+                }
+                if (index < values.length) {
+                    position.set(Position.PREFIX_ADC + 2, Double.parseDouble(values[index++]));
+                }
+                break;
+            case "DTT":
+                position.set(Position.KEY_STATUS, Integer.parseInt(values[index++], 16));
+                if (!values[index++].isEmpty()) {
+                    int io = Integer.parseInt(values[index - 1], 16);
+                    position.set(Position.KEY_IGNITION, BitUtil.check(io, 0));
+                    position.set(Position.PREFIX_IN + 1, BitUtil.check(io, 1));
+                    position.set(Position.PREFIX_IN + 2, BitUtil.check(io, 2));
+                    position.set(Position.PREFIX_IN + 3, BitUtil.check(io, 3));
+                    position.set(Position.PREFIX_IN + 4, BitUtil.check(io, 4));
+                    position.set(Position.PREFIX_OUT + 1, BitUtil.check(io, 5));
+                    position.set(Position.PREFIX_OUT + 2, BitUtil.check(io, 6));
+                    position.set(Position.PREFIX_OUT + 3, BitUtil.check(io, 7));
+                }
+                position.set(Position.KEY_GEOFENCE, values[index++] + values[index++]);
+                position.set("eventStatus", values[index++]);
+                if (index < values.length) {
+                    position.set("packetType", values[index++]);
+                }
+                break;
+            case "ETD":
+                position.set("eventData", values[index++]);
+                break;
+            case "OBD":
+                position.set("obd", values[index++]);
+                break;
+            case "TAG":
+                position.set("tagData", values[index++]);
+                break;
+            case "IWD":
+                if (index < values.length && values[index + 1].equals("0")) {
+                    position.set(Position.KEY_DRIVER_UNIQUE_ID, values[index + 2]);
+                }
+                break;
+            default:
+                break;
+        }
+    }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
-        position.setDeviceId(deviceSession.getDeviceId());
+    private Object decodeData(DeviceSession deviceSession, Date time, String data) {
 
-        if (time != null) {
-            position.setTime(time);
-        }
+        List<Position> positions = new LinkedList<>();
+        Position position = null;
+        int index = 0;
+        String[] fragments = data.split(",");
 
-        position.set(Position.KEY_EVENT, parser.next());
+        while (index < fragments.length) {
 
-        position.setValid(parser.next().equals("A"));
-        position.set(Position.KEY_SATELLITES, parser.nextInt());
+            if (fragments[index].isEmpty() || Character.isDigit(fragments[index].charAt(0))) {
 
-        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
-        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
-        position.setCourse(parser.nextDouble(0));
-        position.setAltitude(parser.nextDouble(0));
+                if (position != null) {
+                    positions.add(position);
+                }
 
-        position.set(Position.KEY_HDOP, parser.nextDouble(0));
-        position.set(Position.KEY_VDOP, parser.nextDouble(0));
+                position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+                position.setTime(time);
 
-        if (parser.hasNext(5)) {
-            position.setNetwork(new Network(CellTower.from(parser.nextInt(0), parser.nextInt(0),
-                    parser.nextHexInt(0), parser.nextHexInt(0), parser.nextInt(0))));
-        }
-        if (parser.hasNext()) {
-            position.set(Position.KEY_ODOMETER, parser.nextInt(0));
-        }
-        position.set(Position.KEY_POWER, parser.nextDouble());
-        position.set(Position.KEY_BATTERY, parser.nextDouble());
-
-        if (parser.hasNext(6)) {
-            position.set(Position.KEY_STATUS, parser.nextHexLong());
-            Integer io = parser.nextHexInt();
-            if (io != null) {
-                position.set(Position.KEY_IGNITION, BitUtil.check(io, 0));
-                position.set(Position.PREFIX_IN + 1, BitUtil.check(io, 1));
-                position.set(Position.PREFIX_IN + 2, BitUtil.check(io, 2));
-                position.set(Position.PREFIX_IN + 3, BitUtil.check(io, 3));
-                position.set(Position.PREFIX_IN + 4, BitUtil.check(io, 4));
-                position.set(Position.PREFIX_OUT + 1, BitUtil.check(io, 5));
-                position.set(Position.PREFIX_OUT + 2, BitUtil.check(io, 6));
-                position.set(Position.PREFIX_OUT + 3, BitUtil.check(io, 7));
-            }
-            position.set(Position.KEY_GEOFENCE, parser.next() + parser.next());
-            position.set("eventStatus", parser.next());
-            position.set("packetType", parser.next());
-        }
+                if (!fragments[index++].isEmpty()) {
+                    position.set(Position.KEY_EVENT, Integer.parseInt(fragments[index - 1]));
+                }
 
-        if (parser.hasNext()) {
-            position.set("eventData", parser.next());
-        }
+            } else {
+
+                decodeFragment(position, fragments[index++]);
+
+            }
 
-        if (parser.hasNext()) {
-            position.set("obd", parser.next());
         }
 
-        if (parser.hasNext()) {
-            position.set("tagData", parser.next());
+        if (position != null) {
+            positions.add(position);
         }
 
-        return position;
+        return positions;
     }
 
     @Override
@@ -226,8 +225,7 @@ public class GoSafeProtocolDecoder extends BaseProtocolDecoder {
 
         if (pattern == PATTERN_OLD) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             DateBuilder dateBuilder = new DateBuilder()
@@ -248,18 +246,12 @@ public class GoSafeProtocolDecoder extends BaseProtocolDecoder {
 
         } else {
 
-            Date time = null;
+            Date time = new Date();
             if (parser.hasNext(6)) {
                 time = parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY);
             }
 
-            List<Position> positions = new LinkedList<>();
-            Parser itemParser = new Parser(PATTERN_ITEM, parser.next());
-            while (itemParser.find()) {
-                positions.add(decodePosition(deviceSession, itemParser, time));
-            }
-
-            return positions;
+            return decodeData(deviceSession, time, parser.next());
 
         }
     }
diff --git a/src/org/traccar/protocol/GotopProtocolDecoder.java b/src/org/traccar/protocol/GotopProtocolDecoder.java
index f938887e2..29e8d87dd 100644
--- a/src/org/traccar/protocol/GotopProtocolDecoder.java
+++ b/src/org/traccar/protocol/GotopProtocolDecoder.java
@@ -55,8 +55,7 @@ public class GotopProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/Gps056ProtocolDecoder.java b/src/org/traccar/protocol/Gps056ProtocolDecoder.java
index 7248365b0..ccb389250 100644
--- a/src/org/traccar/protocol/Gps056ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gps056ProtocolDecoder.java
@@ -93,8 +93,7 @@ public class Gps056ProtocolDecoder extends BaseProtocolDecoder {
 
         } else if (type.startsWith("GPSL")) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             DateBuilder dateBuilder = new DateBuilder()
@@ -116,8 +115,7 @@ public class Gps056ProtocolDecoder extends BaseProtocolDecoder {
 
         } else if (type.startsWith("SYNC")) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             getLastLocation(position, null);
diff --git a/src/org/traccar/protocol/Gps103ProtocolDecoder.java b/src/org/traccar/protocol/Gps103ProtocolDecoder.java
index 099047aa0..f32d22c00 100644
--- a/src/org/traccar/protocol/Gps103ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gps103ProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,6 +26,7 @@ import org.traccar.model.Network;
 import org.traccar.model.Position;
 
 import java.net.SocketAddress;
+import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 public class Gps103ProtocolDecoder extends BaseProtocolDecoder {
@@ -38,10 +39,19 @@ public class Gps103ProtocolDecoder extends BaseProtocolDecoder {
             .text("imei:")
             .number("(d+),")                     // imei
             .expression("([^,]+),")              // alarm
+            .groupBegin()
             .number("(dd)/?(dd)/?(dd) ?")        // local date (yymmdd)
             .number("(dd):?(dd)(?:dd)?,")        // local time (hhmmss)
+            .or()
+            .number("d*,")
+            .groupEnd()
             .expression("([^,]+)?,")             // rfid
-            .expression("[FL],")                 // full / low
+            .groupBegin()
+            .text("L,,,")
+            .number("(x+),,")                    // lac
+            .number("(x+),,,")                   // cid
+            .or()
+            .text("F,")
             .groupBegin()
             .number("(dd)(dd)(dd).d+")           // time utc (hhmmss)
             .or()
@@ -63,24 +73,10 @@ public class Gps103ProtocolDecoder extends BaseProtocolDecoder {
             .expression("([^,;]+)?,?")
             .expression("([^,;]+)?,?")
             .expression("([^,;]+)?,?")
+            .groupEnd()
             .any()
             .compile();
 
-    private static final Pattern PATTERN_NETWORK = new PatternBuilder()
-            .text("imei:")
-            .number("(d+),")                     // imei
-            .expression("[^,]+,")                // alarm
-            .number("d*,,")
-            .text("L,,,")
-            .number("(x+),,")                    // lac
-            .number("(x+),,,")                   // cid
-            .any()
-            .compile();
-
-    private static final Pattern PATTERN_HANDSHAKE = new PatternBuilder()
-            .number("##,imei:(d+),A")
-            .compile();
-
     private static final Pattern PATTERN_OBD = new PatternBuilder()
             .text("imei:")
             .number("(d+),")                     // imei
@@ -143,86 +139,9 @@ public class Gps103ProtocolDecoder extends BaseProtocolDecoder {
         }
     }
 
-    @Override
-    protected Object decode(
-            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
-
-        String sentence = (String) msg;
-
-        // Send response #1
-        if (sentence.contains("##")) {
-            if (channel != null) {
-                channel.write("LOAD", remoteAddress);
-                Parser handshakeParser = new Parser(PATTERN_HANDSHAKE, sentence);
-                if (handshakeParser.matches()) {
-                    getDeviceSession(channel, remoteAddress, handshakeParser.next());
-                }
-            }
-            return null;
-        }
-
-        // Send response #2
-        if (!sentence.isEmpty() && Character.isDigit(sentence.charAt(0))) {
-            if (channel != null) {
-                channel.write("ON", remoteAddress);
-            }
-            int start = sentence.indexOf("imei:");
-            if (start >= 0) {
-                sentence = sentence.substring(start);
-            } else {
-                return null;
-            }
-        }
+    private Position decodeRegular(Channel channel, SocketAddress remoteAddress, String sentence) {
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
-
-        Parser parser = new Parser(PATTERN_NETWORK, sentence);
-        if (parser.matches()) {
-
-            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
-            if (deviceSession == null) {
-                return null;
-            }
-            position.setDeviceId(deviceSession.getDeviceId());
-
-            getLastLocation(position, null);
-
-            position.setNetwork(new Network(
-                    CellTower.fromLacCid(parser.nextHexInt(0), parser.nextHexInt(0))));
-
-            return position;
-
-        }
-
-        parser = new Parser(PATTERN_OBD, sentence);
-        if (parser.matches()) {
-
-            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
-            if (deviceSession == null) {
-                return null;
-            }
-            position.setDeviceId(deviceSession.getDeviceId());
-
-            getLastLocation(position, parser.nextDateTime());
-
-            position.set(Position.KEY_ODOMETER, parser.nextInt(0));
-            parser.nextDouble(0); // instant fuel consumption
-            position.set(Position.KEY_FUEL_CONSUMPTION, parser.nextDouble(0));
-            position.set(Position.KEY_HOURS, parser.nextInt());
-            position.set(Position.KEY_OBD_SPEED, parser.nextInt(0));
-            position.set(Position.KEY_ENGINE_LOAD, parser.next());
-            position.set(Position.KEY_COOLANT_TEMP, parser.nextInt());
-            position.set(Position.KEY_THROTTLE, parser.next());
-            position.set(Position.KEY_RPM, parser.nextInt(0));
-            position.set(Position.KEY_BATTERY, parser.nextDouble(0));
-            position.set(Position.KEY_DTCS, parser.next().replace(',', ' ').trim());
-
-            return position;
-
-        }
-
-        parser = new Parser(PATTERN, sentence);
+        Parser parser = new Parser(PATTERN, sentence);
         if (!parser.matches()) {
             return null;
         }
@@ -232,6 +151,8 @@ public class Gps103ProtocolDecoder extends BaseProtocolDecoder {
         if (deviceSession == null) {
             return null;
         }
+
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         String alarm = parser.next();
@@ -263,36 +184,115 @@ public class Gps103ProtocolDecoder extends BaseProtocolDecoder {
             position.set(Position.KEY_DRIVER_UNIQUE_ID, rfid);
         }
 
-        String utcHours = parser.next();
-        String utcMinutes = parser.next();
+        if (parser.hasNext(2)) {
 
-        dateBuilder.setTime(localHours, localMinutes, parser.nextInt(0));
+            getLastLocation(position, null);
 
-        // Timezone calculation
-        if (utcHours != null && utcMinutes != null) {
-            int deltaMinutes = (localHours - Integer.parseInt(utcHours)) * 60;
-            deltaMinutes += localMinutes - Integer.parseInt(utcMinutes);
-            if (deltaMinutes <= -12 * 60) {
-                deltaMinutes += 24 * 60;
-            } else if (deltaMinutes > 12 * 60) {
-                deltaMinutes -= 24 * 60;
+            position.setNetwork(new Network(CellTower.fromLacCid(parser.nextHexInt(0), parser.nextHexInt(0))));
+
+        } else {
+
+            String utcHours = parser.next();
+            String utcMinutes = parser.next();
+
+            dateBuilder.setTime(localHours, localMinutes, parser.nextInt(0));
+
+            // Timezone calculation
+            if (utcHours != null && utcMinutes != null) {
+                int deltaMinutes = (localHours - Integer.parseInt(utcHours)) * 60;
+                deltaMinutes += localMinutes - Integer.parseInt(utcMinutes);
+                if (deltaMinutes <= -12 * 60) {
+                    deltaMinutes += 24 * 60;
+                } else if (deltaMinutes > 12 * 60) {
+                    deltaMinutes -= 24 * 60;
+                }
+                dateBuilder.addMinute(-deltaMinutes);
+            }
+            position.setTime(dateBuilder.getDate());
+
+            position.setValid(parser.next().equals("A"));
+            position.setFixTime(position.getDeviceTime());
+            position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN_HEM));
+            position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN_HEM));
+            position.setSpeed(parser.nextDouble(0));
+            position.setCourse(parser.nextDouble(0));
+            position.setAltitude(parser.nextDouble(0));
+
+            for (int i = 1; i <= 5; i++) {
+                position.set(Position.PREFIX_IO + i, parser.next());
             }
-            dateBuilder.addMinute(-deltaMinutes);
+
         }
-        position.setTime(dateBuilder.getDate());
 
-        position.setValid(parser.next().equals("A"));
-        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN_HEM));
-        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN_HEM));
-        position.setSpeed(parser.nextDouble(0));
-        position.setCourse(parser.nextDouble(0));
-        position.setAltitude(parser.nextDouble(0));
+        return position;
+    }
+
+    private Position decodeObd(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN_OBD, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
 
-        for (int i = 1; i <= 5; i++) {
-            position.set(Position.PREFIX_IO + i, parser.next());
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
         }
 
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        getLastLocation(position, parser.nextDateTime());
+
+        position.set(Position.KEY_ODOMETER, parser.nextInt(0));
+        parser.nextDouble(0); // instant fuel consumption
+        position.set(Position.KEY_FUEL_CONSUMPTION, parser.nextDouble(0));
+        position.set(Position.KEY_HOURS, parser.nextInt());
+        position.set(Position.KEY_OBD_SPEED, parser.nextInt(0));
+        position.set(Position.KEY_ENGINE_LOAD, parser.next());
+        position.set(Position.KEY_COOLANT_TEMP, parser.nextInt());
+        position.set(Position.KEY_THROTTLE, parser.next());
+        position.set(Position.KEY_RPM, parser.nextInt(0));
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0));
+        position.set(Position.KEY_DTCS, parser.next().replace(',', ' ').trim());
+
         return position;
     }
 
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.contains("##")) {
+            if (channel != null) {
+                channel.write("LOAD", remoteAddress);
+                Matcher matcher = Pattern.compile("##,imei:(\\d+),A").matcher(sentence);
+                if (matcher.matches()) {
+                    getDeviceSession(channel, remoteAddress, matcher.group(1));
+                }
+            }
+            return null;
+        }
+
+        if (!sentence.isEmpty() && Character.isDigit(sentence.charAt(0))) {
+            if (channel != null) {
+                channel.write("ON", remoteAddress);
+            }
+            int start = sentence.indexOf("imei:");
+            if (start >= 0) {
+                sentence = sentence.substring(start);
+            } else {
+                return null;
+            }
+        }
+
+        if (sentence.contains("OBD")) {
+            return decodeObd(channel, remoteAddress, sentence);
+        } else {
+            return decodeRegular(channel, remoteAddress, sentence);
+        }
+    }
+
 }
diff --git a/src/org/traccar/protocol/GpsGateProtocolDecoder.java b/src/org/traccar/protocol/GpsGateProtocolDecoder.java
index ca1d6453e..5c7096276 100644
--- a/src/org/traccar/protocol/GpsGateProtocolDecoder.java
+++ b/src/org/traccar/protocol/GpsGateProtocolDecoder.java
@@ -118,8 +118,7 @@ public class GpsGateProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             DateBuilder dateBuilder = new DateBuilder()
@@ -143,8 +142,7 @@ public class GpsGateProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
 
             DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
             if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/GpsMarkerProtocolDecoder.java b/src/org/traccar/protocol/GpsMarkerProtocolDecoder.java
index f65f5b2bb..ca5bdcbed 100644
--- a/src/org/traccar/protocol/GpsMarkerProtocolDecoder.java
+++ b/src/org/traccar/protocol/GpsMarkerProtocolDecoder.java
@@ -61,8 +61,7 @@ public class GpsMarkerProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/GpsmtaProtocolDecoder.java b/src/org/traccar/protocol/GpsmtaProtocolDecoder.java
index 11777bece..c71162078 100644
--- a/src/org/traccar/protocol/GpsmtaProtocolDecoder.java
+++ b/src/org/traccar/protocol/GpsmtaProtocolDecoder.java
@@ -57,8 +57,7 @@ public class GpsmtaProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/GranitProtocolDecoder.java b/src/org/traccar/protocol/GranitProtocolDecoder.java
index 8e935ae9e..50d879bb4 100644
--- a/src/org/traccar/protocol/GranitProtocolDecoder.java
+++ b/src/org/traccar/protocol/GranitProtocolDecoder.java
@@ -158,8 +158,7 @@ public class GranitProtocolDecoder extends BaseProtocolDecoder {
 
         if (deviceSession != null && indexTilde == -1) {
             String bufString = buf.toString(StandardCharsets.US_ASCII);
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             position.setTime(new Date());
@@ -186,8 +185,7 @@ public class GranitProtocolDecoder extends BaseProtocolDecoder {
             if (channel != null) {
                 sendResponseCurrent(channel, deviceId, unixTime);
             }
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             position.setTime(new Date(unixTime * 1000));
@@ -219,8 +217,7 @@ public class GranitProtocolDecoder extends BaseProtocolDecoder {
                 int timeIncrement = buf.getUnsignedShort(buf.readerIndex() + 120);
                 for (int i = 0; i < 6; i++) {
                     if (buf.getUnsignedByte(buf.readerIndex()) != 0xFE) {
-                        Position position = new Position();
-                        position.setProtocol(getProtocolName());
+                        Position position = new Position(getProtocolName());
                         position.setDeviceId(deviceSession.getDeviceId());
                         position.setTime(new Date((unixTime + i * timeIncrement) * 1000));
                         decodeStructure(buf, position);
diff --git a/src/org/traccar/protocol/Gt02ProtocolDecoder.java b/src/org/traccar/protocol/Gt02ProtocolDecoder.java
index a520bff13..a4f1a4161 100644
--- a/src/org/traccar/protocol/Gt02ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gt02ProtocolDecoder.java
@@ -47,8 +47,7 @@ public class Gt02ProtocolDecoder extends BaseProtocolDecoder {
         buf.skipBytes(2); // header
         buf.readByte(); // size
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         // Zero for location messages
         int power = buf.readUnsignedByte();
diff --git a/src/org/traccar/protocol/Gt06ProtocolDecoder.java b/src/org/traccar/protocol/Gt06ProtocolDecoder.java
index 37f64ee02..3e5ebc8c5 100644
--- a/src/org/traccar/protocol/Gt06ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gt06ProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -44,20 +44,10 @@ import java.util.regex.Pattern;
 
 public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
 
-    private boolean forceTimeZone = false;
-    private final TimeZone timeZone = TimeZone.getTimeZone("UTC");
-
-    private int serverIndex;
-
     private final Map<Integer, ChannelBuffer> photos = new HashMap<>();
 
     public Gt06ProtocolDecoder(Gt06Protocol protocol) {
         super(protocol);
-
-        if (Context.getConfig().hasKey(getProtocolName() + ".timezone")) {
-            forceTimeZone = true;
-            timeZone.setRawOffset(Context.getConfig().getInteger(getProtocolName() + ".timezone") * 1000);
-        }
     }
 
     public static final int MSG_LOGIN = 0x01;
@@ -172,7 +162,7 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
         }
     }
 
-    private void sendResponse(Channel channel, boolean extended, int type, ChannelBuffer content) {
+    private void sendResponse(Channel channel, boolean extended, int type, int index, ChannelBuffer content) {
         if (channel != null) {
             ChannelBuffer response = ChannelBuffers.dynamicBuffer();
             int length = 5 + (content != null ? content.readableBytes() : 0);
@@ -187,7 +177,7 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
             if (content != null) {
                 response.writeBytes(content);
             }
-            response.writeShort(++serverIndex);
+            response.writeShort(index);
             response.writeShort(Checksum.crc16(Checksum.CRC16_X25,
                     response.toByteBuffer(2, response.writerIndex() - 2)));
             response.writeByte('\r'); response.writeByte('\n'); // ending
@@ -201,12 +191,12 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
         content.writeInt(pictureId);
         content.writeInt(photo.writerIndex());
         content.writeShort(Math.min(photo.writableBytes(), 1024));
-        sendResponse(channel, false, MSG_X1_PHOTO_DATA, content);
+        sendResponse(channel, false, MSG_X1_PHOTO_DATA, 0, content);
     }
 
-    private boolean decodeGps(Position position, ChannelBuffer buf, boolean hasLength) {
+    private boolean decodeGps(Position position, ChannelBuffer buf, boolean hasLength, TimeZone timezone) {
 
-        DateBuilder dateBuilder = new DateBuilder(timeZone)
+        DateBuilder dateBuilder = new DateBuilder(timezone)
                 .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
                 .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
         position.setTime(dateBuilder.getDate());
@@ -389,6 +379,9 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
             if (deviceSession == null) {
                 return null;
             }
+            if (deviceSession.getTimeZone() == null) {
+                deviceSession.setTimeZone(getTimeZone(deviceSession.getDeviceId()));
+            }
         }
 
         if (type == MSG_LOGIN) {
@@ -396,6 +389,11 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
             String imei = ChannelBuffers.hexDump(buf.readBytes(8)).substring(1);
             buf.readUnsignedShort(); // type
 
+            deviceSession = getDeviceSession(channel, remoteAddress, imei);
+            if (deviceSession != null && deviceSession.getTimeZone() == null) {
+                deviceSession.setTimeZone(getTimeZone(deviceSession.getDeviceId()));
+            }
+
             if (dataLength > 10) {
                 int extensionBits = buf.readUnsignedShort();
                 int hours = (extensionBits >> 4) / 100;
@@ -404,20 +402,24 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
                 if ((extensionBits & 0x8) != 0) {
                     offset = -offset;
                 }
-                if (!forceTimeZone) {
-                    timeZone.setRawOffset(offset * 1000);
+                if (deviceSession != null) {
+                    TimeZone timeZone = deviceSession.getTimeZone();
+                    if (timeZone.getRawOffset() == 0) {
+                        timeZone.setRawOffset(offset * 1000);
+                        deviceSession.setTimeZone(timeZone);
+                    }
                 }
+
             }
 
-            if (getDeviceSession(channel, remoteAddress, imei) != null) {
-                sendResponse(channel, false, type, null);
+            if (deviceSession != null) {
+                sendResponse(channel, false, type, buf.getShort(buf.writerIndex() - 6), null);
             }
 
         } else if (type == MSG_HEARTBEAT) {
 
-            Position position = new Position();
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
-            position.setProtocol(getProtocolName());
 
             getLastLocation(position, null);
 
@@ -426,7 +428,7 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
             position.set(Position.KEY_IGNITION, BitUtil.check(status, 1));
             position.set(Position.KEY_CHARGE, BitUtil.check(status, 2));
 
-            sendResponse(channel, false, type, null);
+            sendResponse(channel, false, type, buf.getShort(buf.writerIndex() - 6), null);
 
             return position;
 
@@ -437,7 +439,7 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
             content.writeByte(response.length());
             content.writeInt(0);
             content.writeBytes(response.getBytes(StandardCharsets.US_ASCII));
-            sendResponse(channel, true, MSG_ADDRESS_RESPONSE, content);
+            sendResponse(channel, true, MSG_ADDRESS_RESPONSE, 0, content);
 
         } else if (type == MSG_TIME_REQUEST) {
 
@@ -449,17 +451,16 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
             content.writeByte(calendar.get(Calendar.HOUR_OF_DAY));
             content.writeByte(calendar.get(Calendar.MINUTE));
             content.writeByte(calendar.get(Calendar.SECOND));
-            sendResponse(channel, false, MSG_TIME_REQUEST, content);
+            sendResponse(channel, false, MSG_TIME_REQUEST, 0, content);
 
         } else if (type == MSG_X1_GPS) {
 
-            Position position = new Position();
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
-            position.setProtocol(getProtocolName());
 
             buf.readUnsignedInt(); // data and alarm
 
-            decodeGps(position, buf, false);
+            decodeGps(position, buf, false, deviceSession.getTimeZone());
 
             buf.readUnsignedShort(); // terminal info
 
@@ -501,9 +502,8 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
 
     private Object decodeWifi(ChannelBuffer buf, DeviceSession deviceSession) throws Exception {
 
-        Position position = new Position();
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
-        position.setProtocol(getProtocolName());
 
         DateBuilder dateBuilder = new DateBuilder()
                 .setYear(BcdUtil.readInteger(buf, 2))
@@ -540,16 +540,15 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
     private Object decodeBasicOther(Channel channel, ChannelBuffer buf,
             DeviceSession deviceSession, int type, int dataLength) throws Exception {
 
-        Position position = new Position();
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
-        position.setProtocol(getProtocolName());
 
         if (type == MSG_LBS_MULTIPLE || type == MSG_LBS_EXTEND || type == MSG_LBS_WIFI
                 || type == MSG_LBS_2 || type == MSG_WIFI_3) {
 
             boolean longFormat = type == MSG_LBS_2 || type == MSG_WIFI_3;
 
-            DateBuilder dateBuilder = new DateBuilder(timeZone)
+            DateBuilder dateBuilder = new DateBuilder(deviceSession.getTimeZone())
                     .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
                     .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
 
@@ -595,7 +594,7 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
         } else if (isSupported(type)) {
 
             if (hasGps(type)) {
-                decodeGps(position, buf, false);
+                decodeGps(position, buf, false, deviceSession.getTimeZone());
             } else {
                 getLastLocation(position, null);
             }
@@ -622,7 +621,7 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
 
             buf.skipBytes(dataLength);
             if (type != MSG_COMMAND_0 && type != MSG_COMMAND_1 && type != MSG_COMMAND_2) {
-                sendResponse(channel, false, type, null);
+                sendResponse(channel, false, type, buf.getShort(buf.writerIndex() - 6), null);
             }
             return null;
 
@@ -636,7 +635,7 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
             position.set(Position.KEY_GEOFENCE, buf.readUnsignedByte());
         }
 
-        sendResponse(channel, false, type, null);
+        sendResponse(channel, false, type, buf.getShort(buf.writerIndex() - 6), null);
 
         return position;
     }
@@ -648,9 +647,12 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
+        if (deviceSession.getTimeZone() == null) {
+            deviceSession.setTimeZone(getTimeZone(deviceSession.getDeviceId()));
+        }
+
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
-        position.setProtocol(getProtocolName());
 
         buf.readUnsignedShort(); // length
         int type = buf.readUnsignedByte();
@@ -711,13 +713,14 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
                 sendPhotoRequest(channel, pictureId);
             } else {
                 Device device = Context.getDeviceManager().getById(deviceSession.getDeviceId());
-                Context.getMediaManager().writeFile(device.getUniqueId(), photo, "jpg");
+                position.set(
+                        Position.KEY_IMAGE, Context.getMediaManager().writeFile(device.getUniqueId(), photo, "jpg"));
                 photos.remove(pictureId);
             }
 
         } else if (type == MSG_AZ735_GPS || type == MSG_AZ735_ALARM) {
 
-            if (!decodeGps(position, buf, true)) {
+            if (!decodeGps(position, buf, true, deviceSession.getTimeZone())) {
                 getLastLocation(position, position.getDeviceTime());
             }
 
@@ -756,7 +759,7 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
 
             buf.skipBytes(buf.readUnsignedByte()); // reserved extension
 
-            sendResponse(channel, true, type, null);
+            sendResponse(channel, true, type, buf.getShort(buf.writerIndex() - 6), null);
 
             return position;
 
diff --git a/src/org/traccar/protocol/Gt30ProtocolDecoder.java b/src/org/traccar/protocol/Gt30ProtocolDecoder.java
index 51135c80a..27081a108 100644
--- a/src/org/traccar/protocol/Gt30ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gt30ProtocolDecoder.java
@@ -84,8 +84,7 @@ public class Gt30ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         if (parser.hasNext()) {
diff --git a/src/org/traccar/protocol/H02ProtocolDecoder.java b/src/org/traccar/protocol/H02ProtocolDecoder.java
index 4414870d2..9764adf04 100644
--- a/src/org/traccar/protocol/H02ProtocolDecoder.java
+++ b/src/org/traccar/protocol/H02ProtocolDecoder.java
@@ -101,8 +101,7 @@ public class H02ProtocolDecoder extends BaseProtocolDecoder {
 
     private Position decodeBinary(ChannelBuffer buf, Channel channel, SocketAddress remoteAddress) {
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         buf.readByte(); // marker
 
@@ -267,8 +266,7 @@ public class H02ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         if (parser.hasNext()) {
@@ -348,8 +346,7 @@ public class H02ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
@@ -388,8 +385,7 @@ public class H02ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
@@ -422,8 +418,7 @@ public class H02ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
@@ -461,7 +456,7 @@ public class H02ProtocolDecoder extends BaseProtocolDecoder {
 
         switch (marker) {
             case "*":
-                String sentence = buf.toString(StandardCharsets.US_ASCII);
+                String sentence = buf.toString(StandardCharsets.US_ASCII).trim();
                 int typeStart = sentence.indexOf(',', sentence.indexOf(',') + 1) + 1;
                 int typeEnd = sentence.indexOf(',', typeStart);
                 if (typeEnd > 0) {
diff --git a/src/org/traccar/protocol/HaicomProtocolDecoder.java b/src/org/traccar/protocol/HaicomProtocolDecoder.java
index 37898a9bc..94ec93cfb 100644
--- a/src/org/traccar/protocol/HaicomProtocolDecoder.java
+++ b/src/org/traccar/protocol/HaicomProtocolDecoder.java
@@ -62,8 +62,7 @@ public class HaicomProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/HomtecsProtocolDecoder.java b/src/org/traccar/protocol/HomtecsProtocolDecoder.java
index 508de173c..f4ae54d1f 100644
--- a/src/org/traccar/protocol/HomtecsProtocolDecoder.java
+++ b/src/org/traccar/protocol/HomtecsProtocolDecoder.java
@@ -66,8 +66,7 @@ public class HomtecsProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.YMD_HMS));
diff --git a/src/org/traccar/protocol/HuaShengProtocolDecoder.java b/src/org/traccar/protocol/HuaShengProtocolDecoder.java
index 96f87fd94..88f23b28c 100644
--- a/src/org/traccar/protocol/HuaShengProtocolDecoder.java
+++ b/src/org/traccar/protocol/HuaShengProtocolDecoder.java
@@ -103,8 +103,7 @@ public class HuaShengProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             int status = buf.readUnsignedShort();
diff --git a/src/org/traccar/protocol/HuabaoProtocolDecoder.java b/src/org/traccar/protocol/HuabaoProtocolDecoder.java
index c31c6af1c..8643f39af 100644
--- a/src/org/traccar/protocol/HuabaoProtocolDecoder.java
+++ b/src/org/traccar/protocol/HuabaoProtocolDecoder.java
@@ -129,8 +129,7 @@ public class HuabaoProtocolDecoder extends BaseProtocolDecoder {
 
         } else if (type == MSG_LOCATION_REPORT) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedInt()));
diff --git a/src/org/traccar/protocol/HuabaoProtocolEncoder.java b/src/org/traccar/protocol/HuabaoProtocolEncoder.java
index 7d6f0510d..d1889bf5e 100644
--- a/src/org/traccar/protocol/HuabaoProtocolEncoder.java
+++ b/src/org/traccar/protocol/HuabaoProtocolEncoder.java
@@ -18,10 +18,10 @@ package org.traccar.protocol;
 import org.jboss.netty.buffer.ChannelBuffer;
 import org.jboss.netty.buffer.ChannelBuffers;
 import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.Log;
 import org.traccar.model.Command;
 
-import javax.xml.bind.DatatypeConverter;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 
@@ -31,10 +31,10 @@ public class HuabaoProtocolEncoder extends BaseProtocolEncoder {
     protected Object encodeCommand(Command command) {
 
         ChannelBuffer id =  ChannelBuffers.wrappedBuffer(
-                DatatypeConverter.parseHexBinary(getUniqueId(command.getDeviceId())));
+                DataConverter.parseHex(getUniqueId(command.getDeviceId())));
 
         ChannelBuffer data = ChannelBuffers.dynamicBuffer();
-        byte[] time = DatatypeConverter.parseHexBinary(new SimpleDateFormat("yyMMddHHmmss").format(new Date()));
+        byte[] time = DataConverter.parseHex(new SimpleDateFormat("yyMMddHHmmss").format(new Date()));
 
         switch (command.getType()) {
             case Command.TYPE_ENGINE_STOP:
diff --git a/src/org/traccar/protocol/HunterProProtocolDecoder.java b/src/org/traccar/protocol/HunterProProtocolDecoder.java
index b1e3f84a2..fa470c065 100644
--- a/src/org/traccar/protocol/HunterProProtocolDecoder.java
+++ b/src/org/traccar/protocol/HunterProProtocolDecoder.java
@@ -56,8 +56,7 @@ public class HunterProProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/IdplProtocolDecoder.java b/src/org/traccar/protocol/IdplProtocolDecoder.java
index e56a0f022..9990e0da5 100644
--- a/src/org/traccar/protocol/IdplProtocolDecoder.java
+++ b/src/org/traccar/protocol/IdplProtocolDecoder.java
@@ -69,8 +69,7 @@ public class IdplProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         position.set(Position.KEY_TYPE, parser.nextInt(0));
 
diff --git a/src/org/traccar/protocol/IntellitracProtocolDecoder.java b/src/org/traccar/protocol/IntellitracProtocolDecoder.java
index 4a526376e..5b66fa7ec 100644
--- a/src/org/traccar/protocol/IntellitracProtocolDecoder.java
+++ b/src/org/traccar/protocol/IntellitracProtocolDecoder.java
@@ -72,8 +72,7 @@ public class IntellitracProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/Ivt401ProtocolDecoder.java b/src/org/traccar/protocol/Ivt401ProtocolDecoder.java
index f209ee09e..d2f1d3d69 100644
--- a/src/org/traccar/protocol/Ivt401ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Ivt401ProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -43,7 +43,7 @@ public class Ivt401ProtocolDecoder extends BaseProtocolDecoder {
             .number("(d+),")                     // speed
             .number("(d+),")                     // course
             .number("(-?d+.?d*),")               // altitude
-            .number("(d+),")                     // satellites
+            .number("d+,")                       // satellites or battery status
             .number("(d),")                      // gps status
             .number("(d+),")                     // rssi
             .number("(d+),")                     // input
@@ -51,6 +51,30 @@ public class Ivt401ProtocolDecoder extends BaseProtocolDecoder {
             .number("(d+.d+),")                  // adc
             .number("(d+.d+),")                  // power
             .number("(d+.d+),")                  // battery
+            .number("(-?d+.?d*),")               // pcb temp
+            .expression("([^,]+),")              // temp
+            .number("(d+),")                     // movement
+            .number("(d+.d+),")                  // acceleration
+            .number("(-?d+),")                   // tilt
+            .number("(d+),")                     // trip
+            .number("(d+),")                     // odometer
+            .groupBegin()
+            .number("([01]),")                   // overspeed
+            .number("[01],")                     // input 2 misuse
+            .number("[01],")                     // immobilizer
+            .number("[01],")                     // temperature alert
+            .number("[0-2]+,")                   // geofence
+            .number("([0-3]),")                  // harsh driving
+            .number("[01],")                     // reconnect
+            .number("([01]),")                   // low battery
+            .number("([01]),")                   // power disconnected
+            .number("[01],")                     // gps failure
+            .number("([01]),")                   // towing
+            .number("[01],")                     // server unreachable
+            .number("[128],")                    // sleep mode
+            .expression("([^,]+)?,")             // driver id
+            .number("d+,")                       // sms count
+            .groupEnd("?")
             .any()
             .compile();
 
@@ -68,8 +92,7 @@ public class Ivt401ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
@@ -79,17 +102,79 @@ public class Ivt401ProtocolDecoder extends BaseProtocolDecoder {
         position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
         position.setCourse(parser.nextInt());
         position.setAltitude(parser.nextDouble());
-
-        position.set(Position.KEY_SATELLITES, parser.nextInt());
-
         position.setValid(parser.nextInt() > 0);
 
         position.set(Position.KEY_RSSI, parser.nextInt());
-        position.set(Position.KEY_INPUT, parser.nextBinInt());
-        position.set(Position.KEY_OUTPUT, parser.nextBinInt());
+
+        String input = parser.next();
+        for (int i = 0; i < input.length(); i++) {
+            int value = Character.getNumericValue(input.charAt(i));
+            if (value < 2) {
+                position.set(Position.PREFIX_IN + (i + 1), value > 0);
+            }
+        }
+
+        String output = parser.next();
+        for (int i = 0; i < output.length(); i++) {
+            position.set(Position.PREFIX_OUT + (i + 1), Character.getNumericValue(output.charAt(i)) > 0);
+        }
+
         position.set(Position.PREFIX_ADC + 1, parser.nextDouble());
         position.set(Position.KEY_POWER, parser.nextDouble());
         position.set(Position.KEY_BATTERY, parser.nextDouble());
+        position.set(Position.KEY_DEVICE_TEMP, parser.nextDouble());
+
+        String temp = parser.next();
+        if (temp.startsWith("M")) {
+            int index = 1;
+            int startIndex = 1;
+            int endIndex;
+            while (startIndex < temp.length()) {
+                endIndex = temp.indexOf('-', startIndex + 1);
+                if (endIndex < 0) {
+                    endIndex = temp.indexOf('+', startIndex + 1);
+                }
+                if (endIndex < 0) {
+                    endIndex = temp.length();
+                }
+                if (endIndex > 0) {
+                    double value = Double.parseDouble(temp.substring(startIndex, endIndex));
+                    position.set(Position.PREFIX_TEMP + index++, value);
+                }
+                startIndex = endIndex;
+            }
+        } else {
+            position.set(Position.PREFIX_TEMP + 1, Double.parseDouble(temp));
+        }
+
+        position.set(Position.KEY_MOTION, parser.nextInt() > 0);
+        position.set(Position.KEY_ACCELERATION, parser.nextDouble());
+
+        parser.nextInt(); // tilt
+        parser.nextInt(); // trip state
+
+        position.set(Position.KEY_ODOMETER, parser.nextLong());
+
+        if (parser.hasNext(6)) {
+            position.set(Position.KEY_ALARM, parser.nextInt() == 1 ? Position.ALARM_OVERSPEED : null);
+            switch (parser.nextInt()) {
+                case 1:
+                    position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+                    break;
+                case 2:
+                    position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+                    break;
+                case 3:
+                    position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
+                    break;
+                default:
+                    break;
+            }
+            position.set(Position.KEY_ALARM, parser.nextInt() == 1 ? Position.ALARM_LOW_BATTERY : null);
+            position.set(Position.KEY_ALARM, parser.nextInt() == 1 ? Position.ALARM_POWER_CUT : null);
+            position.set(Position.KEY_ALARM, parser.nextInt() == 1 ? Position.ALARM_TOW : null);
+            position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
+        }
 
         return position;
     }
diff --git a/src/org/traccar/protocol/JpKorjarProtocolDecoder.java b/src/org/traccar/protocol/JpKorjarProtocolDecoder.java
index 654b3e3d0..8766115ce 100644
--- a/src/org/traccar/protocol/JpKorjarProtocolDecoder.java
+++ b/src/org/traccar/protocol/JpKorjarProtocolDecoder.java
@@ -60,8 +60,7 @@ public class JpKorjarProtocolDecoder extends BaseProtocolDecoder {
             return null;

         }

 

-        Position position = new Position();

-        position.setProtocol(getProtocolName());

+        Position position = new Position(getProtocolName());

 

         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());

         if (deviceSession == null) {

diff --git a/src/org/traccar/protocol/Jt600ProtocolDecoder.java b/src/org/traccar/protocol/Jt600ProtocolDecoder.java
index e935c1449..f5d8a79a4 100644
--- a/src/org/traccar/protocol/Jt600ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Jt600ProtocolDecoder.java
@@ -73,8 +73,7 @@ public class Jt600ProtocolDecoder extends BaseProtocolDecoder {
 
         while (buf.readableBytes() > 1) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             DateBuilder dateBuilder = new DateBuilder()
@@ -215,8 +214,7 @@ public class Jt600ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.setLongitude(parser.nextCoordinate());
@@ -274,8 +272,7 @@ public class Jt600ProtocolDecoder extends BaseProtocolDecoder {
 
         String type = parser.next();
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
diff --git a/src/org/traccar/protocol/KenjiProtocolDecoder.java b/src/org/traccar/protocol/KenjiProtocolDecoder.java
index 4216da0c3..374cb9c25 100644
--- a/src/org/traccar/protocol/KenjiProtocolDecoder.java
+++ b/src/org/traccar/protocol/KenjiProtocolDecoder.java
@@ -76,8 +76,7 @@ public class KenjiProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/KhdProtocolDecoder.java b/src/org/traccar/protocol/KhdProtocolDecoder.java
index d63219736..2f29a16f8 100644
--- a/src/org/traccar/protocol/KhdProtocolDecoder.java
+++ b/src/org/traccar/protocol/KhdProtocolDecoder.java
@@ -36,17 +36,10 @@ public class KhdProtocolDecoder extends BaseProtocolDecoder {
 
     private String readSerialNumber(ChannelBuffer buf) {
         int b1 = buf.readUnsignedByte();
-        int b2 = buf.readUnsignedByte();
-        if (b2 > 0x80) {
-            b2 -= 0x80;
-        }
-        int b3 = buf.readUnsignedByte();
-        if (b3 > 0x80) {
-            b3 -= 0x80;
-        }
+        int b2 = buf.readUnsignedByte() - 0x80;
+        int b3 = buf.readUnsignedByte() - 0x80;
         int b4 = buf.readUnsignedByte();
-        String serialNumber = String.format("%02d%02d%02d%02d", b1, b2, b3, b4);
-        return String.valueOf(Long.parseLong(serialNumber));
+        return String.format("%02d%02d%02d%02d", b1, b2, b3, b4);
     }
 
     public static final int MSG_LOGIN = 0xB1;
@@ -71,8 +64,7 @@ public class KhdProtocolDecoder extends BaseProtocolDecoder {
         if (type == MSG_ON_DEMAND || type == MSG_POSITION_UPLOAD || type == MSG_POSITION_REUPLOAD
                 || type == MSG_ALARM || type == MSG_REPLY || type == MSG_PERIPHERAL) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
 
             DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, readSerialNumber(buf));
             if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/KhdProtocolEncoder.java b/src/org/traccar/protocol/KhdProtocolEncoder.java
index 618e43dad..cb26c757a 100644
--- a/src/org/traccar/protocol/KhdProtocolEncoder.java
+++ b/src/org/traccar/protocol/KhdProtocolEncoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -27,7 +27,7 @@ public class KhdProtocolEncoder extends BaseProtocolEncoder {
     public static final int MSG_CUT_OIL = 0x39;
     public static final int MSG_RESUME_OIL = 0x38;
 
-    private ChannelBuffer encodeCommand(int command) {
+    private ChannelBuffer encodeCommand(int command, String uniqueId) {
 
         ChannelBuffer buf = ChannelBuffers.dynamicBuffer();
 
@@ -37,7 +37,12 @@ public class KhdProtocolEncoder extends BaseProtocolEncoder {
         buf.writeByte(command);
         buf.writeShort(6); // size
 
-        buf.writeInt(0); // terminal id
+        uniqueId = "00000000".concat(uniqueId);
+        uniqueId = uniqueId.substring(uniqueId.length() - 8);
+        buf.writeByte(Integer.parseInt(uniqueId.substring(0, 2)));
+        buf.writeByte(Integer.parseInt(uniqueId.substring(2, 4)) + 0x80);
+        buf.writeByte(Integer.parseInt(uniqueId.substring(4, 6)) + 0x80);
+        buf.writeByte(Integer.parseInt(uniqueId.substring(6, 8)));
 
         buf.writeByte(Checksum.xor(buf.toByteBuffer()));
         buf.writeByte(0x0D); // ending
@@ -48,11 +53,13 @@ public class KhdProtocolEncoder extends BaseProtocolEncoder {
     @Override
     protected Object encodeCommand(Command command) {
 
+        String uniqueId = getUniqueId(command.getDeviceId());
+
         switch (command.getType()) {
             case Command.TYPE_ENGINE_STOP:
-                return encodeCommand(MSG_CUT_OIL);
+                return encodeCommand(MSG_CUT_OIL, uniqueId);
             case Command.TYPE_ENGINE_RESUME:
-                return encodeCommand(MSG_RESUME_OIL);
+                return encodeCommand(MSG_RESUME_OIL, uniqueId);
             default:
                 Log.warning(new UnsupportedOperationException(command.getType()));
                 break;
diff --git a/src/org/traccar/protocol/L100ProtocolDecoder.java b/src/org/traccar/protocol/L100ProtocolDecoder.java
index 618448080..de966d7af 100644
--- a/src/org/traccar/protocol/L100ProtocolDecoder.java
+++ b/src/org/traccar/protocol/L100ProtocolDecoder.java
@@ -83,8 +83,7 @@ public class L100ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/LaipacProtocolDecoder.java b/src/org/traccar/protocol/LaipacProtocolDecoder.java
index 32d4ff0e6..bfaff9ec4 100644
--- a/src/org/traccar/protocol/LaipacProtocolDecoder.java
+++ b/src/org/traccar/protocol/LaipacProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,6 +22,8 @@ import org.traccar.helper.Checksum;
 import org.traccar.helper.DateBuilder;
 import org.traccar.helper.Parser;
 import org.traccar.helper.PatternBuilder;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
 import org.traccar.model.Position;
 
 import java.net.SocketAddress;
@@ -45,11 +47,45 @@ public class LaipacProtocolDecoder extends BaseProtocolDecoder {
             .number("(d+.d+),")                  // speed
             .number("(d+.d+),")                  // course
             .number("(dd)(dd)(dd),")             // date (ddmmyy)
-            .expression("(.),")                  // type
-            .expression("[^*]+").text("*")
+            .expression("([abZXTSMHFE86430]),")  // event code
+            .expression("([\\d.]+),")            // battery voltage
+            .number("(d+),")                     // current mileage
+            .number("(d),")                      // gps status
+            .number("(d+),")                     // adc1
+            .number("(d+)")                      // adc2
+            .number(",(xxxx)")                   // lac
+            .number("(xxxx),")                   // cid
+            .number("(ddd)")                     // mcc
+            .number("(ddd)")                     // mnc
+            .optional(4)
+            .text("*")
             .number("(xx)")                      // checksum
             .compile();
 
+    private String decodeAlarm(String event) {
+        switch (event) {
+            case "Z":
+                return Position.ALARM_LOW_BATTERY;
+            case "X":
+                return Position.ALARM_GEOFENCE_ENTER;
+            case "T":
+                return Position.ALARM_TAMPERING;
+            case "H":
+                return Position.ALARM_POWER_OFF;
+            case "8":
+                return Position.ALARM_SHOCK;
+            case "7":
+            case "4":
+                return Position.ALARM_GEOFENCE_EXIT;
+            case "6":
+                return Position.ALARM_OVERSPEED;
+            case "3":
+                return Position.ALARM_SOS;
+            default:
+                return null;
+        }
+    }
+
     @Override
     protected Object decode(
             Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
@@ -71,8 +107,7 @@ public class LaipacProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
@@ -80,6 +115,7 @@ public class LaipacProtocolDecoder extends BaseProtocolDecoder {
 
         String status = parser.next();
         position.setValid(status.toUpperCase().equals("A"));
+        position.set(Position.KEY_STATUS, status);
 
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
@@ -89,25 +125,37 @@ public class LaipacProtocolDecoder extends BaseProtocolDecoder {
         dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
-        String type = parser.next();
+        String event = parser.next();
+        position.set(Position.KEY_ALARM, decodeAlarm(event));
+        position.set(Position.KEY_EVENT, event);
+        position.set(Position.KEY_BATTERY, Double.parseDouble(parser.next().replaceAll("\\.", "")) * 0.001);
+        position.set(Position.KEY_ODOMETER, parser.nextDouble());
+        position.set(Position.KEY_GPS, parser.nextInt());
+        position.set(Position.PREFIX_ADC + 1, parser.nextDouble() * 0.001);
+        position.set(Position.PREFIX_ADC + 2, parser.nextDouble() * 0.001);
+
+        Integer lac = parser.nextHexInt();
+        Integer cid = parser.nextHexInt();
+        Integer mcc = parser.nextInt();
+        Integer mnc = parser.nextInt();
+        if (lac != null && cid != null && mcc != null && mnc != null) {
+            position.setNetwork(new Network(CellTower.from(mcc, mnc, lac, cid)));
+        }
+
         String checksum = parser.next();
 
         if (channel != null) {
-
-            if (Character.isLowerCase(status.charAt(0))) {
-                String response = "$EAVACK," + type + "," + checksum;
-                response += Checksum.nmea(response);
+            if (event.equals("3")) {
+                channel.write("$AVCFG,00000000,d*31\r\n");
+            } else if (event.equals("X") || event.equals("4")) {
+                channel.write("$AVCFG,00000000,x*2D\r\n");
+            } else if (event.equals("Z")) {
+                channel.write("$AVCFG,00000000,z*2F\r\n");
+            } else if (Character.isLowerCase(status.charAt(0))) {
+                String response = "$EAVACK," + event + "," + checksum;
+                response += Checksum.nmea(response) + "\r\n";
                 channel.write(response);
             }
-
-            if (type.equals("S") || type.equals("T")) {
-                channel.write("$AVCFG,00000000,t*21");
-            } else if (type.equals("3")) {
-                channel.write("$AVCFG,00000000,d*31");
-            } else if (type.equals("X") || type.equals("4")) {
-                channel.write("$AVCFG,00000000,x*2D");
-            }
-
         }
 
         return position;
diff --git a/src/org/traccar/protocol/M2cProtocolDecoder.java b/src/org/traccar/protocol/M2cProtocolDecoder.java
index b0f40a88c..c11136f4c 100644
--- a/src/org/traccar/protocol/M2cProtocolDecoder.java
+++ b/src/org/traccar/protocol/M2cProtocolDecoder.java
@@ -75,8 +75,7 @@ public class M2cProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.set(Position.KEY_INDEX, parser.nextInt());
diff --git a/src/org/traccar/protocol/M2mProtocolDecoder.java b/src/org/traccar/protocol/M2mProtocolDecoder.java
index a3c2ada2f..b30919865 100644
--- a/src/org/traccar/protocol/M2mProtocolDecoder.java
+++ b/src/org/traccar/protocol/M2mProtocolDecoder.java
@@ -68,8 +68,7 @@ public class M2mProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             DateBuilder dateBuilder = new DateBuilder()
diff --git a/src/org/traccar/protocol/MaestroProtocolDecoder.java b/src/org/traccar/protocol/MaestroProtocolDecoder.java
index 7d779a0a0..6068c93b9 100644
--- a/src/org/traccar/protocol/MaestroProtocolDecoder.java
+++ b/src/org/traccar/protocol/MaestroProtocolDecoder.java
@@ -70,8 +70,7 @@ public class MaestroProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.setValid(parser.nextInt(0) == 1);
diff --git a/src/org/traccar/protocol/ManPowerProtocolDecoder.java b/src/org/traccar/protocol/ManPowerProtocolDecoder.java
index 6cff8b961..0b1c410c3 100644
--- a/src/org/traccar/protocol/ManPowerProtocolDecoder.java
+++ b/src/org/traccar/protocol/ManPowerProtocolDecoder.java
@@ -57,8 +57,7 @@ public class ManPowerProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/MegastekProtocolDecoder.java b/src/org/traccar/protocol/MegastekProtocolDecoder.java
index ad0f20a24..14d39e0cc 100644
--- a/src/org/traccar/protocol/MegastekProtocolDecoder.java
+++ b/src/org/traccar/protocol/MegastekProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -147,8 +147,7 @@ public class MegastekProtocolDecoder extends BaseProtocolDecoder {
 
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         if (!parseLocation(location, position)) {
             return null;
         }
@@ -251,7 +250,7 @@ public class MegastekProtocolDecoder extends BaseProtocolDecoder {
             .number("(d+),")                     // mcc
             .number("(d+),")                     // mnc
             .number("(xxxx),")                   // lac
-            .number("(xxxx),")                   // cid
+            .number("(x+),")                     // cid
             .number("(d+)?,")                    // gsm
             .expression("([01]+)?,")             // input
             .expression("([01]+)?,")             // output
@@ -269,7 +268,7 @@ public class MegastekProtocolDecoder extends BaseProtocolDecoder {
             .number("(d+)?,")                    // rfid
             .expression("[^,]*,")
             .number("(d+)?,")                    // battery
-            .expression("([^,]*);")              // alert
+            .expression("([^,]*)")               // alert
             .any()
             .compile();
 
@@ -285,8 +284,7 @@ public class MegastekProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         if (parser.next().equals("S")) {
diff --git a/src/org/traccar/protocol/MeiligaoProtocolDecoder.java b/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
index 435e2ab14..9f7b8abf7 100644
--- a/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
+++ b/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
@@ -346,8 +346,7 @@ public class MeiligaoProtocolDecoder extends BaseProtocolDecoder {
 
             String sentence = buf.readBytes(endIndex - buf.readerIndex()).toString(StandardCharsets.US_ASCII);
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             position = decodeRegular(position, sentence);
@@ -403,8 +402,7 @@ public class MeiligaoProtocolDecoder extends BaseProtocolDecoder {
 
         } else {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
 
             if (command == MSG_ALARM) {
                 short alarmCode = buf.readUnsignedByte();
diff --git a/src/org/traccar/protocol/MeiligaoProtocolEncoder.java b/src/org/traccar/protocol/MeiligaoProtocolEncoder.java
index 2e0a1e84c..340d947e3 100644
--- a/src/org/traccar/protocol/MeiligaoProtocolEncoder.java
+++ b/src/org/traccar/protocol/MeiligaoProtocolEncoder.java
@@ -19,10 +19,10 @@ import org.jboss.netty.buffer.ChannelBuffer;
 import org.jboss.netty.buffer.ChannelBuffers;
 import org.traccar.BaseProtocolEncoder;
 import org.traccar.helper.Checksum;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.Log;
 import org.traccar.model.Command;
 
-import javax.xml.bind.DatatypeConverter;
 import java.nio.charset.StandardCharsets;
 import java.util.TimeZone;
 
@@ -44,7 +44,7 @@ public class MeiligaoProtocolEncoder extends BaseProtocolEncoder {
 
         buf.writeShort(2 + 2 + 7 + 2 + content.readableBytes() + 2 + 2); // message length
 
-        buf.writeBytes(DatatypeConverter.parseHexBinary((getUniqueId(deviceId) + "FFFFFFFFFFFFFF").substring(0, 14)));
+        buf.writeBytes(DataConverter.parseHex((getUniqueId(deviceId) + "FFFFFFFFFFFFFF").substring(0, 14)));
 
         buf.writeShort(type);
 
diff --git a/src/org/traccar/protocol/MeitrackProtocolDecoder.java b/src/org/traccar/protocol/MeitrackProtocolDecoder.java
index b0195d09f..6fee0fd9f 100644
--- a/src/org/traccar/protocol/MeitrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/MeitrackProtocolDecoder.java
@@ -126,8 +126,7 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
@@ -257,7 +256,7 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
 
         if (values.length > 5 && !values[5].isEmpty()) {
             String[] data = values[5].split("\\|");
-            boolean started = data[0].charAt(0) == '0';
+            boolean started = data[0].charAt(1) == '0';
             position.set("taximeterOn", started);
             position.set("taximeterStart", data[1]);
             if (data.length > 2) {
@@ -287,8 +286,7 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
 
         while (buf.readableBytes() >= 0x34) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             position.set(Position.KEY_EVENT, buf.readUnsignedByte());
@@ -361,8 +359,7 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
         int count = buf.readUnsignedShort();
 
         for (int i = 0; i < count; i++) {
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             buf.readUnsignedShort(); // length
@@ -381,6 +378,9 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
                     case 0x06:
                         position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
                         break;
+                    case 0x07:
+                        position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+                        break;
                     default:
                         buf.readUnsignedByte();
                         break;
@@ -400,6 +400,12 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
                     case 0x0B:
                         position.setAltitude(buf.readShort());
                         break;
+                    case 0x19:
+                        position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.01);
+                        break;
+                    case 0x1A:
+                        position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.01);
+                        break;
                     default:
                         buf.readUnsignedShort();
                         break;
@@ -419,6 +425,9 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
                     case 0x04:
                         position.setTime(new Date((946684800 + buf.readUnsignedInt()) * 1000)); // 2000-01-01
                         break;
+                    case 0x0D:
+                        position.set("runtime", buf.readUnsignedInt());
+                        break;
                     default:
                         buf.readUnsignedInt();
                         break;
@@ -437,9 +446,9 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
         return positions;
     }
 
-    private void requestPhotoPacket(Channel channel, String imei, int index) {
+    private void requestPhotoPacket(Channel channel, String imei, String file, int index) {
         if (channel != null) {
-            String content = "D00,camera_picture.jpg," + index;
+            String content = "D00," + file + "," + index;
             int length = 1 + imei.length() + 1 + content.length() + 5;
             String response = String.format("@@O%02d,%s,%s*", length, imei, content);
             response += Checksum.sum(response) + "\r\n";
@@ -461,11 +470,14 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
         switch (type) {
             case "D00":
                 if (photo == null) {
-                    return null;
+                    photo = ChannelBuffers.dynamicBuffer();
                 }
 
-                index = buf.indexOf(index + 1 + type.length() + 1, buf.writerIndex(), (byte) ',') + 1;
+                index = index + 1 + type.length() + 1;
                 int endIndex =  buf.indexOf(index, buf.writerIndex(), (byte) ',');
+                String file = buf.toString(index, endIndex - index, StandardCharsets.US_ASCII);
+                index = endIndex + 1;
+                endIndex =  buf.indexOf(index, buf.writerIndex(), (byte) ',');
                 int total = Integer.parseInt(buf.toString(index, endIndex - index, StandardCharsets.US_ASCII));
                 index = endIndex + 1;
                 endIndex = buf.indexOf(index, buf.writerIndex(), (byte) ',');
@@ -475,8 +487,7 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
                 photo.writeBytes(buf.readBytes(buf.readableBytes() - 1 - 2 - 2));
 
                 if (current == total - 1) {
-                    Position position = new Position();
-                    position.setProtocol(getProtocolName());
+                    Position position = new Position(getProtocolName());
                     position.setDeviceId(getDeviceSession(channel, remoteAddress, imei).getDeviceId());
 
                     getLastLocation(position, null);
@@ -487,13 +498,13 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
                     return position;
                 } else {
                     if ((current + 1) % 8 == 0) {
-                        requestPhotoPacket(channel, imei, current + 1);
+                        requestPhotoPacket(channel, imei, file, current + 1);
                     }
                     return null;
                 }
             case "D03":
                 photo = ChannelBuffers.dynamicBuffer();
-                requestPhotoPacket(channel, imei, 0);
+                requestPhotoPacket(channel, imei, "camera_picture.jpg", 0);
                 return null;
             case "CCC":
                 return decodeBinaryC(channel, remoteAddress, buf);
diff --git a/src/org/traccar/protocol/MeitrackProtocolEncoder.java b/src/org/traccar/protocol/MeitrackProtocolEncoder.java
index b10a751c1..f73d74de9 100644
--- a/src/org/traccar/protocol/MeitrackProtocolEncoder.java
+++ b/src/org/traccar/protocol/MeitrackProtocolEncoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -49,7 +49,8 @@ public class MeitrackProtocolEncoder extends StringProtocolEncoder {
             case Command.TYPE_ALARM_DISARM:
                 return formatCommand(command, 'M', "C01,0,22022");
             case Command.TYPE_REQUEST_PHOTO:
-                return formatCommand(command, 'D', "D03,1,camera_picture.jpg");
+                int index = command.getInteger(Command.KEY_INDEX);
+                return formatCommand(command, 'D', "D03," + (index > 0 ? index : 1) + ",camera_picture.jpg");
             case Command.TYPE_SEND_SMS:
                 return formatCommand(command, 'f', "C02,0,"
                         + attributes.get(Command.KEY_PHONE) + "," + attributes.get(Command.KEY_MESSAGE));
diff --git a/src/org/traccar/protocol/MiniFinderProtocolDecoder.java b/src/org/traccar/protocol/MiniFinderProtocolDecoder.java
index 8e6e56e80..ab046eca3 100644
--- a/src/org/traccar/protocol/MiniFinderProtocolDecoder.java
+++ b/src/org/traccar/protocol/MiniFinderProtocolDecoder.java
@@ -146,8 +146,7 @@ public class MiniFinderProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         String type = sentence.substring(1, 2);
diff --git a/src/org/traccar/protocol/MiniFinderProtocolEncoder.java b/src/org/traccar/protocol/MiniFinderProtocolEncoder.java
index 486f406a5..d3f49b4e4 100644
--- a/src/org/traccar/protocol/MiniFinderProtocolEncoder.java
+++ b/src/org/traccar/protocol/MiniFinderProtocolEncoder.java
@@ -25,25 +25,25 @@ public class MiniFinderProtocolEncoder extends StringProtocolEncoder implements
 
     @Override
     public String formatValue(String key, Object value) {
-
-        if (key.equals(Command.KEY_ENABLE)) {
-            return (Boolean) value ? "1" : "0";
-        } else if (key.equals(Command.KEY_TIMEZONE)) {
-            return String.format("%+03d", TimeZone.getTimeZone((String) value).getRawOffset() / 3600000);
-        } else if (key.equals(Command.KEY_INDEX)) {
-            switch (((Number) value).intValue()) {
-                case 0:
-                    return "A";
-                case 1:
-                    return "B";
-                case 2:
-                    return "C";
-                default:
-                    return null;
-            }
+        switch (key) {
+            case Command.KEY_ENABLE:
+                return (Boolean) value ? "1" : "0";
+            case Command.KEY_TIMEZONE:
+                return String.format("%+03d", TimeZone.getTimeZone((String) value).getRawOffset() / 3600000);
+            case Command.KEY_INDEX:
+                switch (((Number) value).intValue()) {
+                    case 0:
+                        return "A";
+                    case 1:
+                        return "B";
+                    case 2:
+                        return "C";
+                    default:
+                        return null;
+                }
+            default:
+                return null;
         }
-
-        return null;
     }
 
     @Override
diff --git a/src/org/traccar/protocol/Mta6ProtocolDecoder.java b/src/org/traccar/protocol/Mta6ProtocolDecoder.java
index 0fda94eef..c26e00c56 100644
--- a/src/org/traccar/protocol/Mta6ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Mta6ProtocolDecoder.java
@@ -120,8 +120,7 @@ public class Mta6ProtocolDecoder extends BaseProtocolDecoder {
 
         try {
             while (buf.readable()) {
-                Position position = new Position();
-                position.setProtocol(getProtocolName());
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
 
                 short flags = buf.readUnsignedByte();
@@ -200,9 +199,8 @@ public class Mta6ProtocolDecoder extends BaseProtocolDecoder {
     }
 
     private Position parseFormatA1(DeviceSession deviceSession, ChannelBuffer buf) {
-        Position position = new Position();
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
-        position.setProtocol(getProtocolName());
 
         short flags = buf.readUnsignedByte();
 
diff --git a/src/org/traccar/protocol/MtxProtocolDecoder.java b/src/org/traccar/protocol/MtxProtocolDecoder.java
index d7b572670..412eac493 100644
--- a/src/org/traccar/protocol/MtxProtocolDecoder.java
+++ b/src/org/traccar/protocol/MtxProtocolDecoder.java
@@ -68,8 +68,7 @@ public class MtxProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/MxtProtocolDecoder.java b/src/org/traccar/protocol/MxtProtocolDecoder.java
index 6d82e4a4b..9fe1924c0 100644
--- a/src/org/traccar/protocol/MxtProtocolDecoder.java
+++ b/src/org/traccar/protocol/MxtProtocolDecoder.java
@@ -82,8 +82,7 @@ public class MxtProtocolDecoder extends BaseProtocolDecoder {
 
         if (type == MSG_POSITION) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             buf.readUnsignedByte(); // protocol
diff --git a/src/org/traccar/protocol/NavigilProtocolDecoder.java b/src/org/traccar/protocol/NavigilProtocolDecoder.java
index 360b9c81c..4f3b4ad74 100644
--- a/src/org/traccar/protocol/NavigilProtocolDecoder.java
+++ b/src/org/traccar/protocol/NavigilProtocolDecoder.java
@@ -81,8 +81,7 @@ public class NavigilProtocolDecoder extends BaseProtocolDecoder {
 
     private Position parseUnitReport(
             DeviceSession deviceSession, ChannelBuffer buf, int sequenceNumber) {
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         position.setValid(true);
         position.set(Position.KEY_INDEX, sequenceNumber);
@@ -116,8 +115,7 @@ public class NavigilProtocolDecoder extends BaseProtocolDecoder {
 
     private Position parseTg2Report(
             DeviceSession deviceSession, ChannelBuffer buf, int sequenceNumber) {
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         position.setValid(true);
         position.set(Position.KEY_INDEX, sequenceNumber);
@@ -154,8 +152,7 @@ public class NavigilProtocolDecoder extends BaseProtocolDecoder {
 
     private Position parsePositionReport(
             DeviceSession deviceSession, ChannelBuffer buf, int sequenceNumber, long timestamp) {
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         position.set(Position.KEY_INDEX, sequenceNumber);
         position.setDeviceId(deviceSession.getDeviceId());
@@ -177,8 +174,7 @@ public class NavigilProtocolDecoder extends BaseProtocolDecoder {
 
     private Position parsePositionReport2(
             DeviceSession deviceSession, ChannelBuffer buf, int sequenceNumber, long timestamp) {
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         position.set(Position.KEY_INDEX, sequenceNumber);
         position.setDeviceId(deviceSession.getDeviceId());
@@ -202,8 +198,7 @@ public class NavigilProtocolDecoder extends BaseProtocolDecoder {
 
     private Position parseSnapshot4(
             DeviceSession deviceSession, ChannelBuffer buf, int sequenceNumber) {
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         position.set(Position.KEY_INDEX, sequenceNumber);
         position.setDeviceId(deviceSession.getDeviceId());
@@ -241,8 +236,7 @@ public class NavigilProtocolDecoder extends BaseProtocolDecoder {
 
     private Position parseTrackingData(
             DeviceSession deviceSession, ChannelBuffer buf, int sequenceNumber, long timestamp) {
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         position.set(Position.KEY_INDEX, sequenceNumber);
         position.setDeviceId(deviceSession.getDeviceId());
diff --git a/src/org/traccar/protocol/NavisProtocolDecoder.java b/src/org/traccar/protocol/NavisProtocolDecoder.java
index 8d4e367ab..6881fb8ed 100644
--- a/src/org/traccar/protocol/NavisProtocolDecoder.java
+++ b/src/org/traccar/protocol/NavisProtocolDecoder.java
@@ -76,8 +76,7 @@ public class NavisProtocolDecoder extends BaseProtocolDecoder {
     }
 
     private ParseResult parsePosition(DeviceSession deviceSession, ChannelBuffer buf) {
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         position.setDeviceId(deviceSession.getDeviceId());
 
diff --git a/src/org/traccar/protocol/NoranProtocolDecoder.java b/src/org/traccar/protocol/NoranProtocolDecoder.java
index 990f50484..e10332ece 100644
--- a/src/org/traccar/protocol/NoranProtocolDecoder.java
+++ b/src/org/traccar/protocol/NoranProtocolDecoder.java
@@ -80,8 +80,7 @@ public class NoranProtocolDecoder extends BaseProtocolDecoder {
                 newFormat = true;
             }
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
 
             if (type == MSG_CONTROL_RESPONSE) {
                 buf.readUnsignedInt(); // GIS ip
diff --git a/src/org/traccar/protocol/NvsProtocolDecoder.java b/src/org/traccar/protocol/NvsProtocolDecoder.java
index 0e82fae69..db8347d3c 100644
--- a/src/org/traccar/protocol/NvsProtocolDecoder.java
+++ b/src/org/traccar/protocol/NvsProtocolDecoder.java
@@ -76,8 +76,7 @@ public class NvsProtocolDecoder extends BaseProtocolDecoder {
             int count = buf.readUnsignedByte();
 
             for (int i = 0; i < count; i++) {
-                Position position = new Position();
-                position.setProtocol(getProtocolName());
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
 
                 position.setTime(new Date(buf.readUnsignedInt() * 1000));
diff --git a/src/org/traccar/protocol/ObdDongleProtocolDecoder.java b/src/org/traccar/protocol/ObdDongleProtocolDecoder.java
index e5ae5e93f..5310c90fd 100644
--- a/src/org/traccar/protocol/ObdDongleProtocolDecoder.java
+++ b/src/org/traccar/protocol/ObdDongleProtocolDecoder.java
@@ -91,8 +91,7 @@ public class ObdDongleProtocolDecoder extends BaseProtocolDecoder {
 
             buf.readUnsignedByte(); // event id
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             position.setTime(new Date(buf.readUnsignedInt() * 1000));
diff --git a/src/org/traccar/protocol/OigoProtocolDecoder.java b/src/org/traccar/protocol/OigoProtocolDecoder.java
index 54360c932..2874d0455 100644
--- a/src/org/traccar/protocol/OigoProtocolDecoder.java
+++ b/src/org/traccar/protocol/OigoProtocolDecoder.java
@@ -68,8 +68,7 @@ public class OigoProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.set(Position.KEY_EVENT, buf.readUnsignedByte());
@@ -178,8 +177,7 @@ public class OigoProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         buf.skipBytes(8); // imsi
diff --git a/src/org/traccar/protocol/OkoProtocolDecoder.java b/src/org/traccar/protocol/OkoProtocolDecoder.java
index e86acf0b8..0ebe63ca3 100644
--- a/src/org/traccar/protocol/OkoProtocolDecoder.java
+++ b/src/org/traccar/protocol/OkoProtocolDecoder.java
@@ -72,8 +72,7 @@ public class OkoProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
diff --git a/src/org/traccar/protocol/OpenGtsProtocol.java b/src/org/traccar/protocol/OpenGtsProtocol.java
new file mode 100644
index 000000000..a0246ba1b
--- /dev/null
+++ b/src/org/traccar/protocol/OpenGtsProtocol.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.jboss.netty.bootstrap.ServerBootstrap;
+import org.jboss.netty.channel.ChannelPipeline;
+import org.jboss.netty.handler.codec.http.HttpRequestDecoder;
+import org.jboss.netty.handler.codec.http.HttpResponseEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.TrackerServer;
+
+import java.util.List;
+
+public class OpenGtsProtocol extends BaseProtocol {
+
+    public OpenGtsProtocol() {
+        super("opengts");
+    }
+
+    @Override
+    public void initTrackerServers(List<TrackerServer> serverList) {
+        serverList.add(new TrackerServer(new ServerBootstrap(), getName()) {
+            @Override
+            protected void addSpecificHandlers(ChannelPipeline pipeline) {
+                pipeline.addLast("httpEncoder", new HttpResponseEncoder());
+                pipeline.addLast("httpDecoder", new HttpRequestDecoder());
+                pipeline.addLast("objectDecoder", new OpenGtsProtocolDecoder(OpenGtsProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/org/traccar/protocol/OpenGtsProtocolDecoder.java b/src/org/traccar/protocol/OpenGtsProtocolDecoder.java
new file mode 100644
index 000000000..ba8f434d8
--- /dev/null
+++ b/src/org/traccar/protocol/OpenGtsProtocolDecoder.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.jboss.netty.channel.Channel;
+import org.jboss.netty.handler.codec.http.HttpRequest;
+import org.jboss.netty.handler.codec.http.HttpResponseStatus;
+import org.jboss.netty.handler.codec.http.QueryStringDecoder;
+import org.traccar.BaseHttpProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.List;
+import java.util.Map;
+import java.util.regex.Pattern;
+
+public class OpenGtsProtocolDecoder extends BaseHttpProtocolDecoder {
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$GPRMC,")
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(d+)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d+)(dd.d+),")              // longitude
+            .expression("([EW]),")
+            .number("(d+.d+),")                  // speed
+            .number("(d+.d+),")                  // course
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .any()
+            .compile();
+
+    public OpenGtsProtocolDecoder(OpenGtsProtocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        HttpRequest request = (HttpRequest) msg;
+        QueryStringDecoder decoder = new QueryStringDecoder(request.getUri());
+        Map<String, List<String>> params = decoder.getParameters();
+
+        Position position = new Position();
+        position.setProtocol(getProtocolName());
+
+        for (Map.Entry<String, List<String>> entry : params.entrySet()) {
+            String value = entry.getValue().get(0);
+            switch (entry.getKey()) {
+                case "id":
+                    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, value);
+                    if (deviceSession == null) {
+                        sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
+                        return null;
+                    }
+                    position.setDeviceId(deviceSession.getDeviceId());
+                    break;
+                case "gprmc":
+                    Parser parser = new Parser(PATTERN, value);
+                    if (!parser.matches()) {
+                            sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
+                        return null;
+                    }
+
+                    DateBuilder dateBuilder = new DateBuilder()
+                            .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+                    position.setValid(parser.next().equals("A"));
+                    position.setLatitude(parser.nextCoordinate());
+                    position.setLongitude(parser.nextCoordinate());
+                    position.setSpeed(parser.nextDouble(0));
+                    position.setCourse(parser.nextDouble(0));
+
+                    dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+                    position.setTime(dateBuilder.getDate());
+                    break;
+                case "alt":
+                    position.setAltitude(Double.parseDouble(value));
+                    break;
+                case "batt":
+                    position.set(Position.KEY_BATTERY_LEVEL, Double.parseDouble(value));
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        if (position.getDeviceId() != 0) {
+            sendResponse(channel, HttpResponseStatus.OK);
+            return position;
+        } else {
+            sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
+            return null;
+        }
+    }
+
+}
diff --git a/src/org/traccar/protocol/OrionProtocolDecoder.java b/src/org/traccar/protocol/OrionProtocolDecoder.java
index c65924337..ada864fba 100644
--- a/src/org/traccar/protocol/OrionProtocolDecoder.java
+++ b/src/org/traccar/protocol/OrionProtocolDecoder.java
@@ -79,9 +79,8 @@ public class OrionProtocolDecoder extends BaseProtocolDecoder {
 
             for (int i = 0; i < (header & 0x0f); i++) {
 
-                Position position = new Position();
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
-                position.setProtocol(getProtocolName());
 
                 position.set(Position.KEY_EVENT, buf.readUnsignedByte());
                 buf.readUnsignedByte(); // length
diff --git a/src/org/traccar/protocol/OsmAndProtocolDecoder.java b/src/org/traccar/protocol/OsmAndProtocolDecoder.java
index 61855311a..03abdd588 100644
--- a/src/org/traccar/protocol/OsmAndProtocolDecoder.java
+++ b/src/org/traccar/protocol/OsmAndProtocolDecoder.java
@@ -53,8 +53,7 @@ public class OsmAndProtocolDecoder extends BaseHttpProtocolDecoder {
             params = decoder.getParameters();
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setValid(true);
 
         Network network = new Network();
diff --git a/src/org/traccar/protocol/OwnTracksProtocolDecoder.java b/src/org/traccar/protocol/OwnTracksProtocolDecoder.java
index 49d1cff96..120995dfb 100644
--- a/src/org/traccar/protocol/OwnTracksProtocolDecoder.java
+++ b/src/org/traccar/protocol/OwnTracksProtocolDecoder.java
@@ -50,8 +50,7 @@ public class OwnTracksProtocolDecoder extends BaseHttpProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setValid(true);
 
         position.setLatitude(root.getJsonNumber("lat").doubleValue());
diff --git a/src/org/traccar/protocol/PathAwayProtocolDecoder.java b/src/org/traccar/protocol/PathAwayProtocolDecoder.java
index 1c4531612..845a5e892 100644
--- a/src/org/traccar/protocol/PathAwayProtocolDecoder.java
+++ b/src/org/traccar/protocol/PathAwayProtocolDecoder.java
@@ -72,8 +72,7 @@ public class PathAwayProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
diff --git a/src/org/traccar/protocol/PiligrimProtocolDecoder.java b/src/org/traccar/protocol/PiligrimProtocolDecoder.java
index 9d5bb9e24..f2ec16c59 100644
--- a/src/org/traccar/protocol/PiligrimProtocolDecoder.java
+++ b/src/org/traccar/protocol/PiligrimProtocolDecoder.java
@@ -97,8 +97,7 @@ public class PiligrimProtocolDecoder extends BaseProtocolDecoder {
 
                 if (type == MSG_GPS || type == MSG_GPS_SENSORS) {
 
-                    Position position = new Position();
-                    position.setProtocol(getProtocolName());
+                    Position position = new Position(getProtocolName());
                     position.setDeviceId(deviceSession.getDeviceId());
 
                     DateBuilder dateBuilder = new DateBuilder()
diff --git a/src/org/traccar/protocol/PretraceProtocolDecoder.java b/src/org/traccar/protocol/PretraceProtocolDecoder.java
index 77d94068f..24d707a1c 100644
--- a/src/org/traccar/protocol/PretraceProtocolDecoder.java
+++ b/src/org/traccar/protocol/PretraceProtocolDecoder.java
@@ -71,8 +71,7 @@ public class PretraceProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.setValid(parser.next().equals("A"));
diff --git a/src/org/traccar/protocol/PricolProtocolDecoder.java b/src/org/traccar/protocol/PricolProtocolDecoder.java
index a33e19b90..577665dcc 100644
--- a/src/org/traccar/protocol/PricolProtocolDecoder.java
+++ b/src/org/traccar/protocol/PricolProtocolDecoder.java
@@ -47,8 +47,7 @@ public class PricolProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.set("eventType", buf.readUnsignedByte());
diff --git a/src/org/traccar/protocol/ProgressProtocolDecoder.java b/src/org/traccar/protocol/ProgressProtocolDecoder.java
index 1820ea926..d85b6acb3 100644
--- a/src/org/traccar/protocol/ProgressProtocolDecoder.java
+++ b/src/org/traccar/protocol/ProgressProtocolDecoder.java
@@ -96,8 +96,7 @@ public class ProgressProtocolDecoder extends BaseProtocolDecoder {
             }
 
             for (int j = 0; j < recordCount; j++) {
-                Position position = new Position();
-                position.setProtocol(getProtocolName());
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
 
                 if (type == MSG_LOGMSG) {
diff --git a/src/org/traccar/protocol/Pt3000ProtocolDecoder.java b/src/org/traccar/protocol/Pt3000ProtocolDecoder.java
index c36be7976..f4540afe8 100644
--- a/src/org/traccar/protocol/Pt3000ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Pt3000ProtocolDecoder.java
@@ -56,8 +56,7 @@ public class Pt3000ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/Pt502FrameDecoder.java b/src/org/traccar/protocol/Pt502FrameDecoder.java
index 252c8dd02..4d3e9b4d5 100644
--- a/src/org/traccar/protocol/Pt502FrameDecoder.java
+++ b/src/org/traccar/protocol/Pt502FrameDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2014 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,6 +20,8 @@ import org.jboss.netty.channel.Channel;
 import org.jboss.netty.channel.ChannelHandlerContext;
 import org.jboss.netty.handler.codec.frame.FrameDecoder;
 
+import java.nio.charset.StandardCharsets;
+
 public class Pt502FrameDecoder extends FrameDecoder {
 
     private static final int BINARY_HEADER = 5;
@@ -28,26 +30,41 @@ public class Pt502FrameDecoder extends FrameDecoder {
     protected Object decode(
             ChannelHandlerContext ctx, Channel channel, ChannelBuffer buf) throws Exception {
 
-        if (buf.readableBytes() < BINARY_HEADER) {
+        if (buf.readableBytes() < 10) {
             return null;
         }
 
-        if (buf.getUnsignedByte(buf.readerIndex()) == 0xbf) {
-            buf.skipBytes(BINARY_HEADER);
-        }
+        if (buf.getUnsignedByte(buf.readerIndex()) == 0xbf
+                && buf.toString(buf.readerIndex() + BINARY_HEADER, 4, StandardCharsets.US_ASCII).equals("$PHD")) {
 
-        int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '\r');
-        if (index < 0) {
-            index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '\n');
-        }
+            int length = buf.getUnsignedShort(buf.readerIndex() + 3);
+            if (buf.readableBytes() >= length) {
+                buf.skipBytes(BINARY_HEADER);
+                ChannelBuffer result = buf.readBytes(length - BINARY_HEADER - 2);
+                buf.skipBytes(2); // line break
+                return result;
+            }
+
+        } else {
 
-        if (index > 0) {
-            ChannelBuffer result = buf.readBytes(index - buf.readerIndex());
-            while (buf.readable()
-                    && (buf.getByte(buf.readerIndex()) == '\r' || buf.getByte(buf.readerIndex()) == '\n')) {
-                buf.skipBytes(1);
+            if (buf.getUnsignedByte(buf.readerIndex()) == 0xbf) {
+                buf.skipBytes(BINARY_HEADER);
             }
-            return result;
+
+            int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '\r');
+            if (index < 0) {
+                index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '\n');
+            }
+
+            if (index > 0) {
+                ChannelBuffer result = buf.readBytes(index - buf.readerIndex());
+                while (buf.readable()
+                        && (buf.getByte(buf.readerIndex()) == '\r' || buf.getByte(buf.readerIndex()) == '\n')) {
+                    buf.skipBytes(1);
+                }
+                return result;
+            }
+
         }
 
         return null;
diff --git a/src/org/traccar/protocol/Pt502Protocol.java b/src/org/traccar/protocol/Pt502Protocol.java
index 0116422c2..f7d0d04a2 100644
--- a/src/org/traccar/protocol/Pt502Protocol.java
+++ b/src/org/traccar/protocol/Pt502Protocol.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,7 +17,6 @@ package org.traccar.protocol;
 
 import org.jboss.netty.bootstrap.ServerBootstrap;
 import org.jboss.netty.channel.ChannelPipeline;
-import org.jboss.netty.handler.codec.string.StringDecoder;
 import org.jboss.netty.handler.codec.string.StringEncoder;
 import org.traccar.BaseProtocol;
 import org.traccar.TrackerServer;
@@ -45,7 +44,6 @@ public class Pt502Protocol extends BaseProtocol {
             protected void addSpecificHandlers(ChannelPipeline pipeline) {
                 pipeline.addLast("frameDecoder", new Pt502FrameDecoder());
                 pipeline.addLast("stringEncoder", new StringEncoder());
-                pipeline.addLast("stringDecoder", new StringDecoder());
                 pipeline.addLast("objectEncoder", new Pt502ProtocolEncoder());
                 pipeline.addLast("objectDecoder", new Pt502ProtocolDecoder(Pt502Protocol.this));
             }
diff --git a/src/org/traccar/protocol/Pt502ProtocolDecoder.java b/src/org/traccar/protocol/Pt502ProtocolDecoder.java
index 330ba7643..76e7ee1bf 100644
--- a/src/org/traccar/protocol/Pt502ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Pt502ProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*

- * Copyright 2012 - 2017 Anton Tananaev (anton@traccar.org)

+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)

  * Copyright 2012 Luis Parada (luis.parada@gmail.com)

  *

  * Licensed under the Apache License, Version 2.0 (the "License");

@@ -16,8 +16,11 @@
  */

 package org.traccar.protocol;

 

+import org.jboss.netty.buffer.ChannelBuffer;

+import org.jboss.netty.buffer.ChannelBuffers;

 import org.jboss.netty.channel.Channel;

 import org.traccar.BaseProtocolDecoder;

+import org.traccar.Context;

 import org.traccar.DeviceSession;

 import org.traccar.helper.DateBuilder;

 import org.traccar.helper.Parser;

@@ -25,13 +28,14 @@ import org.traccar.helper.PatternBuilder;
 import org.traccar.model.Position;

 

 import java.net.SocketAddress;

+import java.nio.charset.StandardCharsets;

 import java.util.regex.Pattern;

 

 public class Pt502ProtocolDecoder extends BaseProtocolDecoder {

 

     private static final int MAX_CHUNK_SIZE = 960;

 

-    private byte[] photo;

+    private ChannelBuffer photo;

 

     public Pt502ProtocolDecoder(Pt502Protocol protocol) {

         super(protocol);

@@ -85,26 +89,15 @@ public class Pt502ProtocolDecoder extends BaseProtocolDecoder {
         }

     }

 

-    @Override

-    protected Object decode(

-            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {

+    private Position decodePosition(Channel channel, SocketAddress remoteAddress, String sentence) {

 

-        Parser parser = new Parser(PATTERN, (String) msg);

+        Parser parser = new Parser(PATTERN, sentence);

         if (!parser.matches()) {

             return null;

         }

 

-        Position position = new Position();

-        position.setProtocol(getProtocolName());

-

-        String type = parser.next();

-

-        if (type.startsWith("PHO") && channel != null) {

-            photo = new byte[Integer.parseInt(type.substring(3))];

-            channel.write("#PHD0," + Math.min(photo.length, MAX_CHUNK_SIZE) + "\r\n");

-        }

-

-        position.set(Position.KEY_ALARM, decodeAlarm(type));

+        Position position = new Position(getProtocolName());

+        position.set(Position.KEY_ALARM, decodeAlarm(parser.next()));

 

         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());

         if (deviceSession == null) {

@@ -147,4 +140,71 @@ public class Pt502ProtocolDecoder extends BaseProtocolDecoder {
         return position;

     }

 

+    private void requestPhotoFragment(Channel channel) {

+        if (channel != null) {

+            int offset = photo.writerIndex();

+            int size = Math.min(photo.writableBytes(), MAX_CHUNK_SIZE);

+            channel.write("#PHD" + offset + "," + size + "\r\n");

+        }

+    }

+

+    @Override

+    protected Object decode(

+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {

+

+        ChannelBuffer buf = (ChannelBuffer) msg;

+

+        int typeEndIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ',');

+        String type = buf.toString(buf.readerIndex(), typeEndIndex - buf.readerIndex(), StandardCharsets.US_ASCII);

+

+        if (type.startsWith("$PHD")) {

+

+            int dataIndex = buf.indexOf(typeEndIndex + 1, buf.writerIndex(), (byte) ',') + 1;

+            buf.readerIndex(dataIndex);

+

+            if (photo != null) {

+

+                photo.writeBytes(buf.readBytes(buf.readableBytes()));

+

+                if (photo.writableBytes() > 0) {

+

+                    requestPhotoFragment(channel);

+

+                } else {

+

+                    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);

+                    String uniqueId = Context.getIdentityManager().getById(deviceSession.getDeviceId()).getUniqueId();

+

+                    Position position = new Position(getProtocolName());

+                    position.setDeviceId(deviceSession.getDeviceId());

+

+                    getLastLocation(position, null);

+

+                    position.set(Position.KEY_IMAGE, Context.getMediaManager().writeFile(uniqueId, photo, "jpg"));

+

+                    photo = null;

+

+                    return position;

+

+                }

+

+            }

+

+        } else {

+

+            if (type.startsWith("$PHO")) {

+                int size = Integer.parseInt(type.split("-")[0].substring(4));

+                if (size > 0) {

+                    photo = ChannelBuffers.buffer(size);

+                    requestPhotoFragment(channel);

+                }

+            }

+

+            return decodePosition(channel, remoteAddress, buf.toString(StandardCharsets.US_ASCII));

+

+        }

+

+        return null;

+    }

+

 }

diff --git a/src/org/traccar/protocol/Pt60Protocol.java b/src/org/traccar/protocol/Pt60Protocol.java
new file mode 100644
index 000000000..857790efd
--- /dev/null
+++ b/src/org/traccar/protocol/Pt60Protocol.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.jboss.netty.bootstrap.ServerBootstrap;
+import org.jboss.netty.channel.ChannelPipeline;
+import org.jboss.netty.handler.codec.string.StringDecoder;
+import org.jboss.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.TrackerServer;
+
+import java.util.List;
+
+public class Pt60Protocol extends BaseProtocol {
+
+    public Pt60Protocol() {
+        super("pt60");
+    }
+
+    @Override
+    public void initTrackerServers(List<TrackerServer> serverList) {
+        serverList.add(new TrackerServer(new ServerBootstrap(), getName()) {
+            @Override
+            protected void addSpecificHandlers(ChannelPipeline pipeline) {
+                pipeline.addLast("frameDecoder", new CharacterDelimiterFrameDecoder(1024, "@R#@"));
+                pipeline.addLast("stringEncoder", new StringEncoder());
+                pipeline.addLast("stringDecoder", new StringDecoder());
+                pipeline.addLast("objectDecoder", new Pt60ProtocolDecoder(Pt60Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/org/traccar/protocol/Pt60ProtocolDecoder.java b/src/org/traccar/protocol/Pt60ProtocolDecoder.java
new file mode 100644
index 000000000..c87c22c5f
--- /dev/null
+++ b/src/org/traccar/protocol/Pt60ProtocolDecoder.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.jboss.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.regex.Pattern;
+
+public class Pt60ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Pt60ProtocolDecoder(Pt60Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("@G#@,")                       // header
+            .number("Vdd,")                      // protocol version
+            .number("d,")                        // type
+            .number("(d+),")                     // imei
+            .number("(d+),")                     // imsi
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(-?d+.d+);")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .compile();
+
+    private void sendResponse(Channel channel) {
+        if (channel != null) {
+            DateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");
+            channel.write("@G#@,V01,38," + dateFormat.format(new Date()) + ",@R#@");
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        sendResponse(channel);
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next(), parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(true);
+        position.setTime(parser.nextDateTime());
+        position.setLatitude(parser.nextDouble());
+        position.setLongitude(parser.nextDouble());
+
+        return position;
+    }
+
+}
diff --git a/src/org/traccar/protocol/RaveonProtocolDecoder.java b/src/org/traccar/protocol/RaveonProtocolDecoder.java
index cbe6026a2..ac52493ad 100644
--- a/src/org/traccar/protocol/RaveonProtocolDecoder.java
+++ b/src/org/traccar/protocol/RaveonProtocolDecoder.java
@@ -68,8 +68,7 @@ public class RaveonProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
diff --git a/src/org/traccar/protocol/RecodaProtocolDecoder.java b/src/org/traccar/protocol/RecodaProtocolDecoder.java
index 8db582d35..7bd4d3dae 100644
--- a/src/org/traccar/protocol/RecodaProtocolDecoder.java
+++ b/src/org/traccar/protocol/RecodaProtocolDecoder.java
@@ -64,8 +64,7 @@ public class RecodaProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             position.setTime(new Date(buf.readLong()));
diff --git a/src/org/traccar/protocol/RitiProtocolDecoder.java b/src/org/traccar/protocol/RitiProtocolDecoder.java
index 5c298e8c5..637867908 100644
--- a/src/org/traccar/protocol/RitiProtocolDecoder.java
+++ b/src/org/traccar/protocol/RitiProtocolDecoder.java
@@ -56,8 +56,7 @@ public class RitiProtocolDecoder extends BaseProtocolDecoder {
 
         buf.skipBytes(2); // header
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(buf.readUnsignedShort()));
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/RoboTrackFrameDecoder.java b/src/org/traccar/protocol/RoboTrackFrameDecoder.java
new file mode 100644
index 000000000..af215103c
--- /dev/null
+++ b/src/org/traccar/protocol/RoboTrackFrameDecoder.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.frame.FrameDecoder;
+
+public class RoboTrackFrameDecoder extends FrameDecoder {
+
+    private int messageLength(ChannelBuffer buf) {
+        switch ((int) buf.getByte(buf.readerIndex())) {
+            case RoboTrackProtocolDecoder.MSG_ID:
+                return 69;
+            case RoboTrackProtocolDecoder.MSG_ACK:
+                return 3;
+            case RoboTrackProtocolDecoder.MSG_GPS:
+            case RoboTrackProtocolDecoder.MSG_GSM:
+            case RoboTrackProtocolDecoder.MSG_IMAGE_START:
+                return 24;
+            case RoboTrackProtocolDecoder.MSG_IMAGE_DATA:
+                return 8 + buf.getUnsignedShort(buf.readerIndex() + 1);
+            case RoboTrackProtocolDecoder.MSG_IMAGE_END:
+                return 6;
+            default:
+                return Integer.MAX_VALUE;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ChannelBuffer buf) throws Exception {
+
+        int length = messageLength(buf);
+
+        if (buf.readableBytes() >= length) {
+            return buf.readBytes(length);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/org/traccar/protocol/RoboTrackProtocol.java b/src/org/traccar/protocol/RoboTrackProtocol.java
new file mode 100644
index 000000000..382cb1c2f
--- /dev/null
+++ b/src/org/traccar/protocol/RoboTrackProtocol.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.jboss.netty.bootstrap.ServerBootstrap;
+import org.jboss.netty.channel.ChannelPipeline;
+import org.traccar.BaseProtocol;
+import org.traccar.TrackerServer;
+
+import java.nio.ByteOrder;
+import java.util.List;
+
+public class RoboTrackProtocol extends BaseProtocol {
+
+    public RoboTrackProtocol() {
+        super("robotrack");
+    }
+
+    @Override
+    public void initTrackerServers(List<TrackerServer> serverList) {
+        TrackerServer server = new TrackerServer(new ServerBootstrap(), getName()) {
+            @Override
+            protected void addSpecificHandlers(ChannelPipeline pipeline) {
+                pipeline.addLast("frameDecoder", new RoboTrackFrameDecoder());
+                pipeline.addLast("objectDecoder", new RoboTrackProtocolDecoder(RoboTrackProtocol.this));
+            }
+        };
+        server.setEndianness(ByteOrder.LITTLE_ENDIAN);
+        serverList.add(server);
+    }
+
+}
diff --git a/src/org/traccar/protocol/RoboTrackProtocolDecoder.java b/src/org/traccar/protocol/RoboTrackProtocolDecoder.java
new file mode 100644
index 000000000..4f27fb08e
--- /dev/null
+++ b/src/org/traccar/protocol/RoboTrackProtocolDecoder.java
@@ -0,0 +1,130 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.jboss.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.ByteOrder;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+
+public class RoboTrackProtocolDecoder extends BaseProtocolDecoder {
+
+    public RoboTrackProtocolDecoder(RoboTrackProtocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_ID = 0x00;
+    public static final int MSG_ACK = 0x80;
+    public static final int MSG_GPS = 0x03;
+    public static final int MSG_GSM = 0x04;
+    public static final int MSG_IMAGE_START = 0x06;
+    public static final int MSG_IMAGE_DATA = 0x07;
+    public static final int MSG_IMAGE_END = 0x08;
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ChannelBuffer buf = (ChannelBuffer) msg;
+
+        int type = buf.readUnsignedByte();
+
+        if (type == MSG_ID) {
+
+            buf.skipBytes(16); // name
+
+            String imei = buf.readBytes(15).toString(StandardCharsets.US_ASCII);
+
+            if (getDeviceSession(channel, remoteAddress, imei) != null && channel != null) {
+                ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+                response.writeByte(MSG_ACK);
+                response.writeByte(0x01); // success
+                response.writeByte(0x66); // checksum
+                channel.write(response);
+            }
+
+        } else if (type == MSG_GPS || type == MSG_GSM) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setDeviceTime(new Date(buf.readUnsignedInt() * 1000));
+
+            if (type == MSG_GPS) {
+
+                position.setValid(true);
+                position.setFixTime(position.getDeviceTime());
+                position.setLatitude(buf.readInt() * 0.000001);
+                position.setLongitude(buf.readInt() * 0.000001);
+                position.setSpeed(UnitsConverter.knotsFromKph(buf.readByte()));
+
+            } else {
+
+                getLastLocation(position, position.getDeviceTime());
+
+                position.setNetwork(new Network(CellTower.from(
+                        buf.readUnsignedShort(), buf.readUnsignedShort(),
+                        buf.readUnsignedShort(), buf.readUnsignedShort())));
+
+                buf.readUnsignedByte(); // reserved
+
+            }
+
+            int value = buf.readUnsignedByte();
+
+            position.set(Position.KEY_SATELLITES, BitUtil.to(value, 4));
+            position.set(Position.KEY_RSSI, BitUtil.between(value, 4, 7));
+            position.set(Position.KEY_MOTION, BitUtil.check(value, 7));
+
+            value = buf.readUnsignedByte();
+
+            position.set(Position.KEY_CHARGE, BitUtil.check(value, 0));
+
+            for (int i = 1; i <= 4; i++) {
+                position.set(Position.PREFIX_IN + i, BitUtil.check(value, i));
+            }
+
+            position.set(Position.KEY_BATTERY_LEVEL, BitUtil.from(value, 5) * 100 / 7);
+            position.set(Position.KEY_DEVICE_TEMP, buf.readByte());
+
+            for (int i = 1; i <= 3; i++) {
+                position.set(Position.PREFIX_ADC + i, buf.readUnsignedShort());
+            }
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/org/traccar/protocol/RuptelaProtocolDecoder.java b/src/org/traccar/protocol/RuptelaProtocolDecoder.java
index 8752d30c0..7b11cc5c3 100644
--- a/src/org/traccar/protocol/RuptelaProtocolDecoder.java
+++ b/src/org/traccar/protocol/RuptelaProtocolDecoder.java
@@ -20,10 +20,10 @@ import org.jboss.netty.buffer.ChannelBuffers;
 import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
 import org.traccar.DeviceSession;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.UnitsConverter;
 import org.traccar.model.Position;
 
-import javax.xml.bind.DatatypeConverter;
 import java.net.SocketAddress;
 import java.nio.charset.StandardCharsets;
 import java.util.Date;
@@ -49,8 +49,7 @@ public class RuptelaProtocolDecoder extends BaseProtocolDecoder {
     public static final int MSG_EXTENDED_RECORDS = 68;
 
     private Position decodeCommandResponse(DeviceSession deviceSession, int type, ChannelBuffer buf) {
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         getLastLocation(position, null);
@@ -135,8 +134,7 @@ public class RuptelaProtocolDecoder extends BaseProtocolDecoder {
             int count = buf.readUnsignedByte();
 
             for (int i = 0; i < count; i++) {
-                Position position = new Position();
-                position.setProtocol(getProtocolName());
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
 
                 position.setTime(new Date(buf.readUnsignedInt() * 1000));
@@ -198,7 +196,7 @@ public class RuptelaProtocolDecoder extends BaseProtocolDecoder {
             }
 
             if (channel != null) {
-                channel.write(ChannelBuffers.wrappedBuffer(DatatypeConverter.parseHexBinary("0002640113bc")));
+                channel.write(ChannelBuffers.wrappedBuffer(DataConverter.parseHex("0002640113bc")));
             }
 
             return positions;
@@ -210,8 +208,7 @@ public class RuptelaProtocolDecoder extends BaseProtocolDecoder {
             int count = buf.readUnsignedByte();
 
             for (int i = 0; i < count; i++) {
-                Position position = new Position();
-                position.setProtocol(getProtocolName());
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
 
                 buf.readUnsignedByte(); // reserved
@@ -232,7 +229,7 @@ public class RuptelaProtocolDecoder extends BaseProtocolDecoder {
             }
 
             if (channel != null) {
-                channel.write(ChannelBuffers.wrappedBuffer(DatatypeConverter.parseHexBinary("00026d01c4a4")));
+                channel.write(ChannelBuffers.wrappedBuffer(DataConverter.parseHex("00026d01c4a4")));
             }
 
             return positions;
diff --git a/src/org/traccar/protocol/SanavProtocolDecoder.java b/src/org/traccar/protocol/SanavProtocolDecoder.java
index 151c55795..714bb15d5 100644
--- a/src/org/traccar/protocol/SanavProtocolDecoder.java
+++ b/src/org/traccar/protocol/SanavProtocolDecoder.java
@@ -59,8 +59,7 @@ public class SanavProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/SigfoxProtocolDecoder.java b/src/org/traccar/protocol/SigfoxProtocolDecoder.java
index 7cf57681f..b454e00fa 100644
--- a/src/org/traccar/protocol/SigfoxProtocolDecoder.java
+++ b/src/org/traccar/protocol/SigfoxProtocolDecoder.java
@@ -22,12 +22,12 @@ import org.jboss.netty.handler.codec.http.HttpRequest;
 import org.jboss.netty.handler.codec.http.HttpResponseStatus;
 import org.traccar.BaseHttpProtocolDecoder;
 import org.traccar.DeviceSession;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.UnitsConverter;
 import org.traccar.model.Position;
 
 import javax.json.Json;
 import javax.json.JsonObject;
-import javax.xml.bind.DatatypeConverter;
 import java.io.StringReader;
 import java.net.SocketAddress;
 import java.net.URLDecoder;
@@ -55,14 +55,13 @@ public class SigfoxProtocolDecoder extends BaseHttpProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.setTime(new Date(json.getInt("time") * 1000L));
 
         ChannelBuffer buf = ChannelBuffers.wrappedBuffer(
-                ByteOrder.LITTLE_ENDIAN, DatatypeConverter.parseHexBinary(json.getString("data")));
+                ByteOrder.LITTLE_ENDIAN, DataConverter.parseHex(json.getString("data")));
 
         int type = buf.readUnsignedByte() >> 4;
         if (type == 0) {
diff --git a/src/org/traccar/protocol/SiwiProtocolDecoder.java b/src/org/traccar/protocol/SiwiProtocolDecoder.java
index 198df24d5..66b6465fa 100644
--- a/src/org/traccar/protocol/SiwiProtocolDecoder.java
+++ b/src/org/traccar/protocol/SiwiProtocolDecoder.java
@@ -70,8 +70,7 @@ public class SiwiProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.set(Position.KEY_EVENT, parser.next());
diff --git a/src/org/traccar/protocol/SkypatrolProtocolDecoder.java b/src/org/traccar/protocol/SkypatrolProtocolDecoder.java
index f4dded972..a85595a07 100644
--- a/src/org/traccar/protocol/SkypatrolProtocolDecoder.java
+++ b/src/org/traccar/protocol/SkypatrolProtocolDecoder.java
@@ -67,8 +67,7 @@ public class SkypatrolProtocolDecoder extends BaseProtocolDecoder {
         // Binary position report
         if (apiNumber == 5 && commandType == 2 && messageType == 1 && BitUtil.check(mask, 0)) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
 
             if (BitUtil.check(mask, 1)) {
                 position.set(Position.KEY_STATUS, buf.readUnsignedInt());
diff --git a/src/org/traccar/protocol/SmokeyProtocolDecoder.java b/src/org/traccar/protocol/SmokeyProtocolDecoder.java
index 2dcfeb86f..9c4cb4e21 100644
--- a/src/org/traccar/protocol/SmokeyProtocolDecoder.java
+++ b/src/org/traccar/protocol/SmokeyProtocolDecoder.java
@@ -84,8 +84,7 @@ public class SmokeyProtocolDecoder extends BaseProtocolDecoder {
 
         if (type == MSG_DATE_RECORD) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             position.set(Position.KEY_VERSION_FW, buf.readUnsignedShort());
diff --git a/src/org/traccar/protocol/SpotProtocolDecoder.java b/src/org/traccar/protocol/SpotProtocolDecoder.java
index ed6a03c5f..a8e666a32 100644
--- a/src/org/traccar/protocol/SpotProtocolDecoder.java
+++ b/src/org/traccar/protocol/SpotProtocolDecoder.java
@@ -72,8 +72,7 @@ public class SpotProtocolDecoder extends BaseHttpProtocolDecoder {
             DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, xPath.evaluate("esnName", node));
             if (deviceSession != null) {
 
-                Position position = new Position();
-                position.setProtocol(getProtocolName());
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
 
                 position.setValid(true);
@@ -81,6 +80,8 @@ public class SpotProtocolDecoder extends BaseHttpProtocolDecoder {
                 position.setLatitude(Double.parseDouble(xPath.evaluate("latitude", node)));
                 position.setLongitude(Double.parseDouble(xPath.evaluate("longitude", node)));
 
+                position.set(Position.KEY_EVENT, xPath.evaluate("messageType", node));
+
                 positions.add(position);
 
             }
diff --git a/src/org/traccar/protocol/StarLinkProtocolDecoder.java b/src/org/traccar/protocol/StarLinkProtocolDecoder.java
index 79f013fac..f2c9d2c50 100644
--- a/src/org/traccar/protocol/StarLinkProtocolDecoder.java
+++ b/src/org/traccar/protocol/StarLinkProtocolDecoder.java
@@ -111,8 +111,7 @@ public class StarLinkProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
         position.setValid(true);
 
diff --git a/src/org/traccar/protocol/Stl060ProtocolDecoder.java b/src/org/traccar/protocol/Stl060ProtocolDecoder.java
index 26817a5c8..64d4655c5 100644
--- a/src/org/traccar/protocol/Stl060ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Stl060ProtocolDecoder.java
@@ -75,8 +75,7 @@ public class Stl060ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/SuntechProtocolDecoder.java b/src/org/traccar/protocol/SuntechProtocolDecoder.java
index 6dfc6f77f..b739e699b 100644
--- a/src/org/traccar/protocol/SuntechProtocolDecoder.java
+++ b/src/org/traccar/protocol/SuntechProtocolDecoder.java
@@ -21,6 +21,8 @@ import org.traccar.Context;
 import org.traccar.DeviceSession;
 import org.traccar.helper.BitUtil;
 import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
 import org.traccar.model.Position;
 
 import java.net.SocketAddress;
@@ -76,8 +78,7 @@ public class SuntechProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         if (type.equals("Emergency") || type.equals("Alert")) {
@@ -157,7 +158,7 @@ public class SuntechProtocolDecoder extends BaseProtocolDecoder {
         }
     }
 
-    private Position decode235(
+    private Position decode2356(
             Channel channel, SocketAddress remoteAddress, String protocol, String[] values) throws ParseException {
         int index = 0;
 
@@ -172,12 +173,11 @@ public class SuntechProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
         position.set(Position.KEY_TYPE, type);
 
-        if (protocol.equals("ST300") || protocol.equals("ST500")) {
+        if (protocol.equals("ST300") || protocol.equals("ST500") || protocol.equals("ST600")) {
             index += 1; // model
         }
 
@@ -188,7 +188,12 @@ public class SuntechProtocolDecoder extends BaseProtocolDecoder {
         position.setTime(dateFormat.parse(values[index++] + values[index++]));
 
         if (!protocol.equals("ST500")) {
-            index += 1; // cell
+            int cid = Integer.parseInt(values[index++], 16);
+            if (protocol.equals("ST600")) {
+                position.setNetwork(new Network(CellTower.from(
+                        Integer.parseInt(values[index++]), Integer.parseInt(values[index++]),
+                        Integer.parseInt(values[index++], 16), cid, Integer.parseInt(values[index++]))));
+            }
         }
 
         position.setLatitude(Double.parseDouble(values[index++]));
@@ -289,8 +294,7 @@ public class SuntechProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
         position.set(Position.KEY_TYPE, type);
 
@@ -372,7 +376,7 @@ public class SuntechProtocolDecoder extends BaseProtocolDecoder {
         } else if (values[0].equals("ST910")) {
             return decode9(channel, remoteAddress, values);
         } else {
-            return decode235(channel, remoteAddress, values[0].substring(0, 5), values);
+            return decode2356(channel, remoteAddress, values[0].substring(0, 5), values);
         }
     }
 
diff --git a/src/org/traccar/protocol/SupermateProtocolDecoder.java b/src/org/traccar/protocol/SupermateProtocolDecoder.java
index d9b58a7f4..be325ea29 100644
--- a/src/org/traccar/protocol/SupermateProtocolDecoder.java
+++ b/src/org/traccar/protocol/SupermateProtocolDecoder.java
@@ -65,8 +65,7 @@ public class SupermateProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         String imei = parser.next();
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
diff --git a/src/org/traccar/protocol/T55ProtocolDecoder.java b/src/org/traccar/protocol/T55ProtocolDecoder.java
index bfddf74ac..be3cb5f67 100644
--- a/src/org/traccar/protocol/T55ProtocolDecoder.java
+++ b/src/org/traccar/protocol/T55ProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -110,8 +110,7 @@ public class T55ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         if (deviceSession != null) {
             position.setDeviceId(deviceSession.getDeviceId());
@@ -165,8 +164,7 @@ public class T55ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
@@ -188,8 +186,7 @@ public class T55ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.setTime(new Date());
@@ -209,8 +206,7 @@ public class T55ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.setTime(parser.nextDateTime());
@@ -254,9 +250,11 @@ public class T55ProtocolDecoder extends BaseProtocolDecoder {
         } else if (sentence.startsWith("$PCPTI")) {
             getDeviceSession(channel, remoteAddress, sentence.substring(7, sentence.indexOf(",", 7)));
         } else if (sentence.startsWith("IMEI")) {
-            getDeviceSession(channel, remoteAddress, sentence.substring(5, sentence.length()));
+            getDeviceSession(channel, remoteAddress, sentence.substring(5));
+        } else if (sentence.startsWith("$IMEI")) {
+            getDeviceSession(channel, remoteAddress, sentence.substring(6));
         } else if (sentence.startsWith("$GPFID")) {
-            deviceSession = getDeviceSession(channel, remoteAddress, sentence.substring(7, sentence.length()));
+            deviceSession = getDeviceSession(channel, remoteAddress, sentence.substring(7));
             if (deviceSession != null && position != null) {
                 Position position = this.position;
                 position.setDeviceId(deviceSession.getDeviceId());
diff --git a/src/org/traccar/protocol/T57ProtocolDecoder.java b/src/org/traccar/protocol/T57ProtocolDecoder.java
index db5f94cbb..65dfc46e3 100644
--- a/src/org/traccar/protocol/T57ProtocolDecoder.java
+++ b/src/org/traccar/protocol/T57ProtocolDecoder.java
@@ -63,8 +63,7 @@ public class T57ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
diff --git a/src/org/traccar/protocol/T800xProtocolDecoder.java b/src/org/traccar/protocol/T800xProtocolDecoder.java
index 6430b1344..1fd37864e 100644
--- a/src/org/traccar/protocol/T800xProtocolDecoder.java
+++ b/src/org/traccar/protocol/T800xProtocolDecoder.java
@@ -105,8 +105,7 @@ public class T800xProtocolDecoder extends BaseProtocolDecoder {
 
         if (type == MSG_GPS || type == MSG_ALARM) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             position.set(Position.KEY_INDEX, index);
diff --git a/src/org/traccar/protocol/T800xProtocolEncoder.java b/src/org/traccar/protocol/T800xProtocolEncoder.java
index 6ed5dbccd..038a5e51a 100644
--- a/src/org/traccar/protocol/T800xProtocolEncoder.java
+++ b/src/org/traccar/protocol/T800xProtocolEncoder.java
@@ -18,10 +18,10 @@ package org.traccar.protocol;
 import org.jboss.netty.buffer.ChannelBuffer;
 import org.jboss.netty.buffer.ChannelBuffers;
 import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.Log;
 import org.traccar.model.Command;
 
-import javax.xml.bind.DatatypeConverter;
 import java.nio.charset.StandardCharsets;
 
 public class T800xProtocolEncoder extends BaseProtocolEncoder {
@@ -39,7 +39,7 @@ public class T800xProtocolEncoder extends BaseProtocolEncoder {
         buf.writeByte(T800xProtocolDecoder.MSG_COMMAND);
         buf.writeShort(7 + 8 + 1 + content.length());
         buf.writeShort(1); // serial number
-        buf.writeBytes(DatatypeConverter.parseHexBinary("0" + getUniqueId(command.getDeviceId())));
+        buf.writeBytes(DataConverter.parseHex("0" + getUniqueId(command.getDeviceId())));
         buf.writeByte(MODE_SETTING);
         buf.writeBytes(content.getBytes(StandardCharsets.US_ASCII));
 
diff --git a/src/org/traccar/protocol/TaipProtocolDecoder.java b/src/org/traccar/protocol/TaipProtocolDecoder.java
index e7117a5c9..a7aa9dd96 100644
--- a/src/org/traccar/protocol/TaipProtocolDecoder.java
+++ b/src/org/traccar/protocol/TaipProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -47,7 +47,7 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
             .groupEnd("?")
             .number("(d{5})")                    // seconds
             .or()
-            .expression("(?:RGP|RCQ|RBR)")       // type
+            .expression("(?:RGP|RCQ|RCV|RBR)")   // type
             .number("(dd)?")                     // event
             .number("(dd)(dd)(dd)")              // date (mmddyy)
             .number("(dd)(dd)(dd)")              // time (hhmmss)
@@ -62,12 +62,33 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
             .number("(ddd)")                     // speed
             .number("(ddd)")                     // course
             .groupBegin()
+            .number("([023])")                   // fix mode
+            .number("xx")                        // data age
+            .number("(xx)")                      // input
+            .number("(dd)")                      // event
+            .number("(dd)")                      // hdop
+            .or()
+            .groupBegin()
             .number("(xx)")                      // input
             .number("(xx)")                      // satellites
             .number("(ddd)")                     // battery
             .number("(x{8})")                    // odometer
             .number("[01]")                      // gps power
+            .groupBegin()
+            .number("([023])")                   // fix mode
+            .number("(dd)")                      // pdop
+            .number("dd")                        // satellites
+            .number("xxxx")                      // data age
+            .number("[01]")                      // modem power
+            .number("[0-5]")                     // gsm status
+            .number("(dd)")                      // rssi
+            .number("([-+]dddd)")                // temperature 1
+            .number("xx")                        // seconds from last
+            .number("([-+]dddd)")                // temperature 2
+            .number("xx")                        // seconds from last
+            .groupEnd("?")
             .groupEnd("?")
+            .groupEnd()
             .any()
             .compile();
 
@@ -101,9 +122,9 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
+        Boolean valid = null;
         Integer event = null;
 
         if (parser.hasNext(3)) {
@@ -117,27 +138,6 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
             event = parser.nextInt();
         }
 
-        if (event != null) {
-            switch (event) {
-                case 22:
-                    position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
-                    break;
-                case 23:
-                    position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
-                    break;
-                case 24:
-                    position.set(Position.KEY_ALARM, Position.ALARM_ACCIDENT);
-                    break;
-                case 26:
-                case 28:
-                    position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
-                    break;
-                default:
-                    position.set(Position.KEY_EVENT, event);
-                    break;
-            }
-        }
-
         if (parser.hasNext(6)) {
             position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
         }
@@ -155,13 +155,51 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
         position.setCourse(parser.nextDouble(0));
 
         if (parser.hasNext(4)) {
+            valid = parser.nextInt() > 0;
+            int input = parser.nextHexInt();
+            position.set(Position.KEY_IGNITION, BitUtil.check(input, 7));
+            position.set(Position.KEY_INPUT, input);
+            event = parser.nextInt();
+            position.set(Position.KEY_HDOP, parser.nextInt());
+        }
+
+        if (parser.hasNext(4)) {
             position.set(Position.KEY_INPUT, parser.nextHexInt(0));
             position.set(Position.KEY_SATELLITES, parser.nextHexInt(0));
             position.set(Position.KEY_BATTERY, parser.nextInt(0));
             position.set(Position.KEY_ODOMETER, parser.nextLong(16, 0));
         }
 
-        position.setValid(true);
+        if (parser.hasNext(4)) {
+            valid = parser.nextInt() > 0;
+            position.set(Position.KEY_PDOP, parser.nextInt());
+            position.set(Position.KEY_RSSI, parser.nextInt());
+            position.set(Position.PREFIX_TEMP + 1, parser.nextInt() * 0.01);
+            position.set(Position.PREFIX_TEMP + 2, parser.nextInt() * 0.01);
+        }
+
+        position.setValid(valid != null ? valid : true);
+
+        if (event != null) {
+            position.set(Position.KEY_EVENT, event);
+            switch (event) {
+                case 22:
+                    position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+                    break;
+                case 23:
+                    position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+                    break;
+                case 24:
+                    position.set(Position.KEY_ALARM, Position.ALARM_ACCIDENT);
+                    break;
+                case 26:
+                case 28:
+                    position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
+                    break;
+                default:
+                    break;
+            }
+        }
 
         String[] attributes = null;
         beginIndex = sentence.indexOf(';');
@@ -231,14 +269,13 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
         if (deviceSession != null) {
             if (channel != null) {
                 if (messageIndex != null) {
-                    String response = ">ACK;" + messageIndex + ";ID=" + uniqueId + ";*";
+                    String response = ">ACK;ID=" + uniqueId + ";" + messageIndex + ";*";
                     response += String.format("%02X", Checksum.xor(response)) + "<";
                     channel.write(response, remoteAddress);
                 } else {
                     channel.write(uniqueId, remoteAddress);
                 }
             }
-
             return position;
         }
 
diff --git a/src/org/traccar/protocol/TelicProtocolDecoder.java b/src/org/traccar/protocol/TelicProtocolDecoder.java
index 2c0d714c6..197db059b 100644
--- a/src/org/traccar/protocol/TelicProtocolDecoder.java
+++ b/src/org/traccar/protocol/TelicProtocolDecoder.java
@@ -87,8 +87,7 @@ public class TelicProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/TeltonikaProtocolDecoder.java b/src/org/traccar/protocol/TeltonikaProtocolDecoder.java
index 80f0045d5..d2069e6c9 100644
--- a/src/org/traccar/protocol/TeltonikaProtocolDecoder.java
+++ b/src/org/traccar/protocol/TeltonikaProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -69,6 +69,7 @@ public class TeltonikaProtocolDecoder extends BaseProtocolDecoder {
     public static final int CODEC_GH3000 = 0x07;
     public static final int CODEC_FM4X00 = 0x08;
     public static final int CODEC_12 = 0x0C;
+    public static final int CODEC_16 = 0x10;
 
     private void decodeSerial(Position position, ChannelBuffer buf) {
 
@@ -132,7 +133,10 @@ public class TeltonikaProtocolDecoder extends BaseProtocolDecoder {
                 position.set(Position.PREFIX_TEMP + 3, readValue(buf, length, true) * 0.1);
                 break;
             case 78:
-                position.set(Position.KEY_DRIVER_UNIQUE_ID, String.format("%016X", readValue(buf, length, false)));
+                long driverUniqueId = readValue(buf, length, false);
+                if (driverUniqueId != 0) {
+                    position.set(Position.KEY_DRIVER_UNIQUE_ID, String.format("%016X", driverUniqueId));
+                }
                 break;
             case 80:
                 position.set("workMode", readValue(buf, length, false));
@@ -344,7 +348,7 @@ public class TeltonikaProtocolDecoder extends BaseProtocolDecoder {
         }
 
         // Read 8 byte data
-        if (codec == CODEC_FM4X00) {
+        if (codec == CODEC_FM4X00 || codec == CODEC_16) {
             int cnt = buf.readUnsignedByte();
             for (int j = 0; j < cnt; j++) {
                 decodeOtherParameter(position, buf.readUnsignedByte(), buf, 8);
@@ -381,8 +385,7 @@ public class TeltonikaProtocolDecoder extends BaseProtocolDecoder {
         }
 
         for (int i = 0; i < count; i++) {
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
 
             position.setDeviceId(deviceSession.getDeviceId());
 
diff --git a/src/org/traccar/protocol/ThinkRaceProtocolDecoder.java b/src/org/traccar/protocol/ThinkRaceProtocolDecoder.java
index 4a97fa1a1..f7dd18f51 100644
--- a/src/org/traccar/protocol/ThinkRaceProtocolDecoder.java
+++ b/src/org/traccar/protocol/ThinkRaceProtocolDecoder.java
@@ -87,8 +87,7 @@ public class ThinkRaceProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             position.setTime(new Date(buf.readUnsignedInt() * 1000));
diff --git a/src/org/traccar/protocol/Tk102ProtocolDecoder.java b/src/org/traccar/protocol/Tk102ProtocolDecoder.java
index 41d5b7436..50dd45676 100644
--- a/src/org/traccar/protocol/Tk102ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Tk102ProtocolDecoder.java
@@ -117,8 +117,7 @@ public class Tk102ProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             DateBuilder dateBuilder = new DateBuilder()
diff --git a/src/org/traccar/protocol/Tk103Protocol.java b/src/org/traccar/protocol/Tk103Protocol.java
index 6ef9c0a56..e23982c74 100644
--- a/src/org/traccar/protocol/Tk103Protocol.java
+++ b/src/org/traccar/protocol/Tk103Protocol.java
@@ -47,7 +47,8 @@ public class Tk103Protocol extends BaseProtocol {
                 Command.TYPE_REBOOT_DEVICE,
                 Command.TYPE_SET_ODOMETER,
                 Command.TYPE_ENGINE_STOP,
-                Command.TYPE_ENGINE_RESUME);
+                Command.TYPE_ENGINE_RESUME,
+                Command.TYPE_OUTPUT_CONTROL);
     }
 
     @Override
diff --git a/src/org/traccar/protocol/Tk103ProtocolDecoder.java b/src/org/traccar/protocol/Tk103ProtocolDecoder.java
index eda29e3f8..22a73469f 100644
--- a/src/org/traccar/protocol/Tk103ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Tk103ProtocolDecoder.java
@@ -228,8 +228,7 @@ public class Tk103ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         getLastLocation(position, parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
@@ -263,8 +262,7 @@ public class Tk103ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         getLastLocation(position, null);
@@ -286,8 +284,7 @@ public class Tk103ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         decodeType(position, parser.next(), "0");
@@ -331,8 +328,7 @@ public class Tk103ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         getLastLocation(position, parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
@@ -380,8 +376,7 @@ public class Tk103ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         boolean alternative = parser.next() != null;
diff --git a/src/org/traccar/protocol/Tk103ProtocolEncoder.java b/src/org/traccar/protocol/Tk103ProtocolEncoder.java
index 946f3ad73..3ec562cc3 100644
--- a/src/org/traccar/protocol/Tk103ProtocolEncoder.java
+++ b/src/org/traccar/protocol/Tk103ProtocolEncoder.java
@@ -97,6 +97,8 @@ public class Tk103ProtocolEncoder extends StringProtocolEncoder {
                     return formatCommand(command, "({%s}AV010)", Command.KEY_UNIQUE_ID);
                 case Command.TYPE_ENGINE_RESUME:
                     return formatCommand(command, "({%s}AV011)", Command.KEY_UNIQUE_ID);
+                case Command.TYPE_OUTPUT_CONTROL:
+                    return formatCommand(command, "({%s}AV00{%s})", Command.KEY_UNIQUE_ID, Command.KEY_DATA);
                 default:
                     Log.warning(new UnsupportedOperationException(command.getType()));
                     return null;
diff --git a/src/org/traccar/protocol/Tlt2hProtocolDecoder.java b/src/org/traccar/protocol/Tlt2hProtocolDecoder.java
index cbc851de0..a5a195afa 100644
--- a/src/org/traccar/protocol/Tlt2hProtocolDecoder.java
+++ b/src/org/traccar/protocol/Tlt2hProtocolDecoder.java
@@ -57,6 +57,45 @@ public class Tlt2hProtocolDecoder extends BaseProtocolDecoder {
             .any()
             .compile();
 
+    private void decodeStatus(Position position, String status) {
+        switch (status) {
+            case "AUTOSTART":
+            case "AUTO":
+                position.set(Position.KEY_IGNITION, true);
+                break;
+            case "AUTOSTOP":
+            case "AUTOLOW":
+                position.set(Position.KEY_IGNITION, false);
+                break;
+            case "TOWED":
+                position.set(Position.KEY_ALARM, Position.ALARM_TOW);
+                break;
+            case "SOS":
+                position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+                break;
+            case "DEF":
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_CUT);
+                break;
+            case "BLP":
+                position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
+                break;
+            case "CLP":
+                position.set(Position.KEY_ALARM, Position.ALARM_LOW_POWER);
+                break;
+            case "OS":
+                position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE_EXIT);
+                break;
+            case "RS":
+                position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE_ENTER);
+                break;
+            case "OVERSPEED":
+                position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
+                break;
+            default:
+                break;
+        }
+    }
+
     @Override
     protected Object decode(
             Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
@@ -84,8 +123,7 @@ public class Tlt2hProtocolDecoder extends BaseProtocolDecoder {
             parser = new Parser(PATTERN_POSITION, message);
             if (parser.matches()) {
 
-                Position position = new Position();
-                position.setProtocol(getProtocolName());
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
 
                 parser.next(); // base station info
@@ -102,7 +140,7 @@ public class Tlt2hProtocolDecoder extends BaseProtocolDecoder {
                 dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
                 position.setTime(dateBuilder.getDate());
 
-                position.set(Position.KEY_STATUS, status);
+                decodeStatus(position, status);
 
                 positions.add(position);
             }
diff --git a/src/org/traccar/protocol/TlvProtocolDecoder.java b/src/org/traccar/protocol/TlvProtocolDecoder.java
index 41d65be09..0cf68acb8 100644
--- a/src/org/traccar/protocol/TlvProtocolDecoder.java
+++ b/src/org/traccar/protocol/TlvProtocolDecoder.java
@@ -83,8 +83,7 @@ public class TlvProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             position.setValid(true);
diff --git a/src/org/traccar/protocol/TmgFrameDecoder.java b/src/org/traccar/protocol/TmgFrameDecoder.java
index 549c42466..c39cf03ac 100644
--- a/src/org/traccar/protocol/TmgFrameDecoder.java
+++ b/src/org/traccar/protocol/TmgFrameDecoder.java
@@ -37,13 +37,10 @@ public class TmgFrameDecoder extends FrameDecoder {
                 if (buffer.getByte(guessedIndex) != (byte) '$' || buffer.writerIndex() - guessedIndex < 5) {
                     return false;
                 }
-                if (buffer.getByte(guessedIndex + 4) == ','
+                return buffer.getByte(guessedIndex + 4) == ','
                         && isLetter(buffer.getByte(guessedIndex + 1))
                         && isLetter(buffer.getByte(guessedIndex + 2))
-                        && isLetter(buffer.getByte(guessedIndex + 3))) {
-                    return true;
-                }
-                return false;
+                        && isLetter(buffer.getByte(guessedIndex + 3));
             }
         });
 
diff --git a/src/org/traccar/protocol/TmgProtocolDecoder.java b/src/org/traccar/protocol/TmgProtocolDecoder.java
index 4a3055932..cb10eedd7 100644
--- a/src/org/traccar/protocol/TmgProtocolDecoder.java
+++ b/src/org/traccar/protocol/TmgProtocolDecoder.java
@@ -99,8 +99,7 @@ public class TmgProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         switch (type) {
diff --git a/src/org/traccar/protocol/TopflytechProtocolDecoder.java b/src/org/traccar/protocol/TopflytechProtocolDecoder.java
index 837ca2557..b3a8fa845 100644
--- a/src/org/traccar/protocol/TopflytechProtocolDecoder.java
+++ b/src/org/traccar/protocol/TopflytechProtocolDecoder.java
@@ -53,8 +53,7 @@ public class TopflytechProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/TotemProtocolDecoder.java b/src/org/traccar/protocol/TotemProtocolDecoder.java
index a3e8c9921..5a2c203d2 100644
--- a/src/org/traccar/protocol/TotemProtocolDecoder.java
+++ b/src/org/traccar/protocol/TotemProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,6 +18,7 @@ package org.traccar.protocol;
 import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
 import org.traccar.DeviceSession;
+import org.traccar.helper.BitUtil;
 import org.traccar.helper.DateBuilder;
 import org.traccar.helper.Parser;
 import org.traccar.helper.PatternBuilder;
@@ -131,7 +132,7 @@ public class TotemProtocolDecoder extends BaseProtocolDecoder {
     private static final Pattern PATTERN4 = new PatternBuilder()
             .text("$$")                          // header
             .number("dddd")                      // length
-            .expression("A[ABC]")                // type
+            .number("(xx)")                      // type
             .number("(d+)|")                     // imei
             .number("(x{8})")                    // status
             .number("(dd)(dd)(dd)")              // date (yymmdd)
@@ -163,7 +164,7 @@ public class TotemProtocolDecoder extends BaseProtocolDecoder {
             .any()
             .compile();
 
-    private String decodeAlarm(Short value) {
+    private String decodeAlarm123(int value) {
         switch (value) {
             case 0x01:
                 return Position.ALARM_SOS;
@@ -182,10 +183,31 @@ public class TotemProtocolDecoder extends BaseProtocolDecoder {
         }
     }
 
+    private String decodeAlarm4(int value) {
+        switch (value) {
+            case 0x01:
+                return Position.ALARM_SOS;
+            case 0x02:
+                return Position.ALARM_OVERSPEED;
+            case 0x04:
+                return Position.ALARM_GEOFENCE_EXIT;
+            case 0x05:
+                return Position.ALARM_GEOFENCE_ENTER;
+            case 0x40:
+                return Position.ALARM_SHOCK;
+            case 0x42:
+                return Position.ALARM_ACCELERATION;
+            case 0x43:
+                return Position.ALARM_BRAKING;
+            default:
+                return null;
+        }
+    }
+
     private boolean decode12(Position position, Parser parser, Pattern pattern) {
 
         if (parser.hasNext()) {
-            position.set(Position.KEY_ALARM, decodeAlarm(Short.parseShort(parser.next(), 16)));
+            position.set(Position.KEY_ALARM, decodeAlarm123(Short.parseShort(parser.next(), 16)));
         }
         DateBuilder dateBuilder = new DateBuilder();
         int year = 0, month = 0, day = 0;
@@ -221,12 +243,23 @@ public class TotemProtocolDecoder extends BaseProtocolDecoder {
             position.set(Position.KEY_HDOP, parser.nextDouble());
         }
 
-        position.set(Position.PREFIX_IO + 1, parser.next());
+        int io = parser.nextBinInt();
         if (pattern == PATTERN1) {
+            for (int i = 1; i <= 4; i++) {
+                position.set(Position.PREFIX_IN + i, BitUtil.check(io, 3 + i));
+            }
             position.set(Position.KEY_BATTERY, parser.nextDouble(0) * 0.01);
         } else {
+            position.set(Position.KEY_ANTENNA, BitUtil.check(io, 0));
+            position.set(Position.KEY_CHARGE, BitUtil.check(io, 1));
+            for (int i = 1; i <= 6; i++) {
+                position.set(Position.PREFIX_IN + i, BitUtil.check(io, 1 + i));
+            }
             position.set(Position.KEY_BATTERY, parser.nextDouble(0) * 0.1);
         }
+        for (int i = 1; i <= 4; i++) {
+            position.set(Position.PREFIX_OUT + i, BitUtil.check(io, 7 + i));
+        }
         position.set(Position.KEY_POWER, parser.nextDouble(0));
         position.set(Position.PREFIX_ADC + 1, parser.next());
 
@@ -245,7 +278,7 @@ public class TotemProtocolDecoder extends BaseProtocolDecoder {
     private boolean decode3(Position position, Parser parser) {
 
         if (parser.hasNext()) {
-            position.set(Position.KEY_ALARM, decodeAlarm(Short.parseShort(parser.next(), 16)));
+            position.set(Position.KEY_ALARM, decodeAlarm123(Short.parseShort(parser.next(), 16)));
         }
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
@@ -276,7 +309,26 @@ public class TotemProtocolDecoder extends BaseProtocolDecoder {
 
     private boolean decode4(Position position, Parser parser) {
 
-        position.set(Position.KEY_STATUS, parser.next());
+        long status = parser.nextHexLong();
+
+        position.set(Position.KEY_ALARM, BitUtil.check(status, 32 - 1) ? Position.ALARM_SOS : null);
+        position.set(Position.KEY_IGNITION, BitUtil.check(status, 32 - 2));
+        position.set(Position.KEY_ALARM, BitUtil.check(status, 32 - 3) ? Position.ALARM_OVERSPEED : null);
+        position.set(Position.KEY_CHARGE, BitUtil.check(status, 32 - 4));
+        position.set(Position.KEY_ALARM, BitUtil.check(status, 32 - 5) ? Position.ALARM_GEOFENCE_EXIT : null);
+        position.set(Position.KEY_ALARM, BitUtil.check(status, 32 - 6) ? Position.ALARM_GEOFENCE_ENTER : null);
+        position.set(Position.PREFIX_OUT + 1, BitUtil.check(status, 32 - 9));
+        position.set(Position.PREFIX_OUT + 2, BitUtil.check(status, 32 - 10));
+        position.set(Position.PREFIX_OUT + 3, BitUtil.check(status, 32 - 11));
+        position.set(Position.PREFIX_OUT + 4, BitUtil.check(status, 32 - 12));
+        position.set(Position.PREFIX_IN + 2, BitUtil.check(status, 32 - 13));
+        position.set(Position.PREFIX_IN + 3, BitUtil.check(status, 32 - 14));
+        position.set(Position.PREFIX_IN + 4, BitUtil.check(status, 32 - 15));
+        position.set(Position.KEY_ALARM, BitUtil.check(status, 32 - 16) ? Position.ALARM_SHOCK : null);
+        position.set(Position.KEY_ALARM, BitUtil.check(status, 32 - 18) ? Position.ALARM_LOW_BATTERY : null);
+        position.set(Position.KEY_ALARM, BitUtil.check(status, 32 - 22) ? Position.ALARM_JAMMING : null);
+
+        position.setValid(BitUtil.check(status, 32 - 20));
 
         position.setTime(parser.nextDateTime());
 
@@ -300,7 +352,6 @@ public class TotemProtocolDecoder extends BaseProtocolDecoder {
         position.set(Position.KEY_HDOP, parser.nextDouble(0));
         position.set(Position.KEY_ODOMETER, parser.nextInt(0) * 1000);
 
-        position.setValid(true);
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
 
@@ -329,8 +380,11 @@ public class TotemProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
+
+        if (pattern == PATTERN4) {
+            position.set(Position.KEY_ALARM, decodeAlarm4(parser.nextHexInt()));
+        }
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/Tr20ProtocolDecoder.java b/src/org/traccar/protocol/Tr20ProtocolDecoder.java
index 403a2fda2..579d575b0 100644
--- a/src/org/traccar/protocol/Tr20ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Tr20ProtocolDecoder.java
@@ -70,8 +70,7 @@ public class Tr20ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/Tr900ProtocolDecoder.java b/src/org/traccar/protocol/Tr900ProtocolDecoder.java
index 7dbdc5697..0ce4158e4 100644
--- a/src/org/traccar/protocol/Tr900ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Tr900ProtocolDecoder.java
@@ -63,8 +63,7 @@ public class Tr900ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/TrackboxProtocolDecoder.java b/src/org/traccar/protocol/TrackboxProtocolDecoder.java
index 7e542af93..2c113fb76 100644
--- a/src/org/traccar/protocol/TrackboxProtocolDecoder.java
+++ b/src/org/traccar/protocol/TrackboxProtocolDecoder.java
@@ -77,8 +77,7 @@ public class TrackboxProtocolDecoder extends BaseProtocolDecoder {
         }
         sendResponse(channel);
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
diff --git a/src/org/traccar/protocol/TrakMateProtocolDecoder.java b/src/org/traccar/protocol/TrakMateProtocolDecoder.java
index 8965a18b4..293c13fad 100644
--- a/src/org/traccar/protocol/TrakMateProtocolDecoder.java
+++ b/src/org/traccar/protocol/TrakMateProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2017 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,23 +17,18 @@ package org.traccar.protocol;
 
 import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
-import org.traccar.Context;
 import org.traccar.DeviceSession;
 import org.traccar.helper.Parser;
 import org.traccar.helper.PatternBuilder;
 import org.traccar.model.Position;
 
 import java.net.SocketAddress;
-import java.util.TimeZone;
 import java.util.regex.Pattern;
 
 public class TrakMateProtocolDecoder extends BaseProtocolDecoder {
 
-    private final TimeZone timeZone = TimeZone.getTimeZone("UTC");
-
     public TrakMateProtocolDecoder(TrakMateProtocol protocol) {
         super(protocol);
-        timeZone.setRawOffset(Context.getConfig().getInteger(getProtocolName() + ".timezone") * 1000);
     }
 
     private static final Pattern PATTERN_SRT = new PatternBuilder()
@@ -112,8 +107,7 @@ public class TrakMateProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.setLatitude(parser.nextDouble(0));
@@ -139,8 +133,7 @@ public class TrakMateProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         parser.next(); // seq
@@ -170,8 +163,7 @@ public class TrakMateProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         parser.next(); // seq
diff --git a/src/org/traccar/protocol/TramigoProtocolDecoder.java b/src/org/traccar/protocol/TramigoProtocolDecoder.java
index b1e28e17d..2605346a9 100644
--- a/src/org/traccar/protocol/TramigoProtocolDecoder.java
+++ b/src/org/traccar/protocol/TramigoProtocolDecoder.java
@@ -61,8 +61,7 @@ public class TramigoProtocolDecoder extends BaseProtocolDecoder {
         long id = buf.readUnsignedInt();
         buf.readUnsignedInt(); // time
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.set(Position.KEY_INDEX, index);
         position.setValid(true);
 
diff --git a/src/org/traccar/protocol/TrvProtocolDecoder.java b/src/org/traccar/protocol/TrvProtocolDecoder.java
index 918748f7b..e0cebc9a5 100644
--- a/src/org/traccar/protocol/TrvProtocolDecoder.java
+++ b/src/org/traccar/protocol/TrvProtocolDecoder.java
@@ -144,8 +144,7 @@ public class TrvProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             getLastLocation(position, null);
@@ -167,8 +166,7 @@ public class TrvProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             DateBuilder dateBuilder = new DateBuilder()
diff --git a/src/org/traccar/protocol/Tt8850ProtocolDecoder.java b/src/org/traccar/protocol/Tt8850ProtocolDecoder.java
index 5e30d0994..0134f4764 100644
--- a/src/org/traccar/protocol/Tt8850ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Tt8850ProtocolDecoder.java
@@ -69,8 +69,7 @@ public class Tt8850ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/TytanProtocolDecoder.java b/src/org/traccar/protocol/TytanProtocolDecoder.java
index de0330250..a65ad4cfc 100644
--- a/src/org/traccar/protocol/TytanProtocolDecoder.java
+++ b/src/org/traccar/protocol/TytanProtocolDecoder.java
@@ -146,8 +146,7 @@ public class TytanProtocolDecoder extends BaseProtocolDecoder {
 
         while (buf.readableBytes() > 2) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             int end = buf.readerIndex() + buf.readUnsignedByte();
diff --git a/src/org/traccar/protocol/TzoneProtocolDecoder.java b/src/org/traccar/protocol/TzoneProtocolDecoder.java
index 079ad3126..984891bb6 100644
--- a/src/org/traccar/protocol/TzoneProtocolDecoder.java
+++ b/src/org/traccar/protocol/TzoneProtocolDecoder.java
@@ -128,8 +128,7 @@ public class TzoneProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.set(Position.KEY_VERSION_HW, hardware);
diff --git a/src/org/traccar/protocol/UlbotechProtocolDecoder.java b/src/org/traccar/protocol/UlbotechProtocolDecoder.java
index 31a3d2cfe..5499518a1 100644
--- a/src/org/traccar/protocol/UlbotechProtocolDecoder.java
+++ b/src/org/traccar/protocol/UlbotechProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,7 +19,6 @@ import org.jboss.netty.buffer.ChannelBuffer;
 import org.jboss.netty.buffer.ChannelBuffers;
 import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
-import org.traccar.Context;
 import org.traccar.DeviceSession;
 import org.traccar.helper.BitUtil;
 import org.traccar.helper.Checksum;
@@ -39,11 +38,8 @@ import java.util.regex.Pattern;
 
 public class UlbotechProtocolDecoder extends BaseProtocolDecoder {
 
-    private final long timeZone;
-
     public UlbotechProtocolDecoder(UlbotechProtocol protocol) {
         super(protocol);
-        timeZone = Context.getConfig().getInteger(getProtocolName() + ".timezone", 0);
     }
 
     private static final short DATA_GPS = 0x01;
@@ -188,8 +184,7 @@ public class UlbotechProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
@@ -216,13 +211,16 @@ public class UlbotechProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        if (deviceSession.getTimeZone() == null) {
+            deviceSession.setTimeZone(getTimeZone(deviceSession.getDeviceId()));
+        }
+
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         long seconds = buf.readUnsignedInt() & 0x7fffffffL;
         seconds += 946684800L; // 2000-01-01 00:00
-        seconds -= timeZone;
+        seconds -= deviceSession.getTimeZone().getRawOffset() / 1000;
         Date time = new Date(seconds * 1000);
 
         boolean hasLocation = false;
diff --git a/src/org/traccar/protocol/UproProtocolDecoder.java b/src/org/traccar/protocol/UproProtocolDecoder.java
index 7a0dca8a2..28f3d0249 100644
--- a/src/org/traccar/protocol/UproProtocolDecoder.java
+++ b/src/org/traccar/protocol/UproProtocolDecoder.java
@@ -116,8 +116,7 @@ public class UproProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         String type = parser.next();
diff --git a/src/org/traccar/protocol/V680ProtocolDecoder.java b/src/org/traccar/protocol/V680ProtocolDecoder.java
index 079a8eb08..caa06a863 100644
--- a/src/org/traccar/protocol/V680ProtocolDecoder.java
+++ b/src/org/traccar/protocol/V680ProtocolDecoder.java
@@ -70,8 +70,7 @@ public class V680ProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
 
             DeviceSession deviceSession;
             if (parser.hasNext()) {
diff --git a/src/org/traccar/protocol/VisiontekProtocolDecoder.java b/src/org/traccar/protocol/VisiontekProtocolDecoder.java
index f32c9fbfe..33c555c6b 100644
--- a/src/org/traccar/protocol/VisiontekProtocolDecoder.java
+++ b/src/org/traccar/protocol/VisiontekProtocolDecoder.java
@@ -81,8 +81,7 @@ public class VisiontekProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next(), parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/Vt200ProtocolDecoder.java b/src/org/traccar/protocol/Vt200ProtocolDecoder.java
index 2ae24efbb..d08107b16 100644
--- a/src/org/traccar/protocol/Vt200ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Vt200ProtocolDecoder.java
@@ -68,8 +68,7 @@ public class Vt200ProtocolDecoder extends BaseProtocolDecoder {
 
         if (type == 0x2086 || type == 0x2084 || type == 0x2082) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             buf.readUnsignedByte(); // data type
@@ -85,7 +84,7 @@ public class Vt200ProtocolDecoder extends BaseProtocolDecoder {
             if (!BitUtil.check(flags, 1)) {
                 position.setLatitude(-position.getLatitude());
             }
-            if (!BitUtil.check(flags, 1)) {
+            if (!BitUtil.check(flags, 2)) {
                 position.setLongitude(-position.getLongitude());
             }
 
@@ -103,8 +102,7 @@ public class Vt200ProtocolDecoder extends BaseProtocolDecoder {
 
         } else if (type == 0x3088) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             getLastLocation(position, null);
diff --git a/src/org/traccar/protocol/VtfmsProtocolDecoder.java b/src/org/traccar/protocol/VtfmsProtocolDecoder.java
index 5fb687e6d..dc2171022 100644
--- a/src/org/traccar/protocol/VtfmsProtocolDecoder.java
+++ b/src/org/traccar/protocol/VtfmsProtocolDecoder.java
@@ -106,8 +106,7 @@ public class VtfmsProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.set(Position.KEY_ALARM, decodeAlarm(parser.nextInt()));
diff --git a/src/org/traccar/protocol/WatchFrameDecoder.java b/src/org/traccar/protocol/WatchFrameDecoder.java
index 826a8b4d0..0009ef30f 100644
--- a/src/org/traccar/protocol/WatchFrameDecoder.java
+++ b/src/org/traccar/protocol/WatchFrameDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,47 +25,66 @@ import java.nio.charset.StandardCharsets;
 
 public class WatchFrameDecoder extends FrameDecoder {
 
-    public static final int MESSAGE_HEADER = 20;
-
     @Override
     protected Object decode(
             ChannelHandlerContext ctx, Channel channel, ChannelBuffer buf) throws Exception {
 
-        if (buf.readableBytes() >= MESSAGE_HEADER) {
-            ChannelBuffer lengthBuffer = ChannelBuffers.dynamicBuffer();
-            buf.getBytes(buf.readerIndex() + MESSAGE_HEADER - 4 - 1, lengthBuffer, 4);
-            int length = Integer.parseInt(lengthBuffer.toString(StandardCharsets.US_ASCII), 16) + MESSAGE_HEADER + 1;
-            if (buf.readableBytes() >= length) {
-                ChannelBuffer frame = ChannelBuffers.dynamicBuffer();
-                int endIndex = buf.readerIndex() + length;
-                while (buf.readerIndex() < endIndex) {
-                    byte b = buf.readByte();
-                    if (b == 0x7D) {
-                        switch (buf.readByte()) {
-                            case 0x01:
-                                frame.writeByte(0x7D);
-                                break;
-                            case 0x02:
-                                frame.writeByte(0x5B);
-                                break;
-                            case 0x03:
-                                frame.writeByte(0x5D);
-                                break;
-                            case 0x04:
-                                frame.writeByte(0x2C);
-                                break;
-                            case 0x05:
-                                frame.writeByte(0x2A);
-                                break;
-                            default:
-                                throw new IllegalArgumentException();
-                        }
-                    } else {
-                        frame.writeByte(b);
+        int idIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*') + 1;
+        if (idIndex <= 0) {
+            return null;
+        }
+
+        int lengthIndex = buf.indexOf(idIndex, buf.writerIndex(), (byte) '*') + 1;
+        if (lengthIndex <= 0) {
+            return null;
+        }
+
+        int payloadIndex = buf.indexOf(lengthIndex, buf.writerIndex(), (byte) '*');
+        if (payloadIndex < 0) {
+            return null;
+        }
+
+        if (payloadIndex + 5 < buf.writerIndex() && buf.getByte(payloadIndex + 5) == '*'
+                && buf.toString(payloadIndex + 1, 4, StandardCharsets.US_ASCII).matches("\\p{XDigit}+")) {
+            lengthIndex = payloadIndex + 1;
+            payloadIndex = buf.indexOf(lengthIndex, buf.writerIndex(), (byte) '*');
+            if (payloadIndex < 0) {
+                return null;
+            }
+        }
+
+        int length = Integer.parseInt(
+                buf.toString(lengthIndex, payloadIndex - lengthIndex, StandardCharsets.US_ASCII), 16);
+        if (buf.readableBytes() >= payloadIndex + 1 + length + 1) {
+            ChannelBuffer frame = ChannelBuffers.dynamicBuffer();
+            int endIndex = buf.readerIndex() + payloadIndex + 1 + length + 1;
+            while (buf.readerIndex() < endIndex) {
+                byte b = buf.readByte();
+                if (b == 0x7D) {
+                    switch (buf.readByte()) {
+                        case 0x01:
+                            frame.writeByte(0x7D);
+                            break;
+                        case 0x02:
+                            frame.writeByte(0x5B);
+                            break;
+                        case 0x03:
+                            frame.writeByte(0x5D);
+                            break;
+                        case 0x04:
+                            frame.writeByte(0x2C);
+                            break;
+                        case 0x05:
+                            frame.writeByte(0x2A);
+                            break;
+                        default:
+                            throw new IllegalArgumentException();
                     }
+                } else {
+                    frame.writeByte(b);
                 }
-                return frame;
             }
+            return frame;
         }
 
         return null;
diff --git a/src/org/traccar/protocol/WatchProtocolDecoder.java b/src/org/traccar/protocol/WatchProtocolDecoder.java
index 86dc9456d..b58c3b6a1 100644
--- a/src/org/traccar/protocol/WatchProtocolDecoder.java
+++ b/src/org/traccar/protocol/WatchProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -48,7 +48,7 @@ public class WatchProtocolDecoder extends BaseProtocolDecoder {
             .expression("([NS]),")
             .number(" *(-?d+.d+),")              // longitude
             .expression("([EW])?,")
-            .number("(d+.d+),")                  // speed
+            .number("(d+.?d*),")                 // speed
             .number("(d+.?d*),")                 // course
             .number("(d+.?d*),")                 // altitude
             .number("(d+),")                     // satellites
@@ -60,10 +60,15 @@ public class WatchProtocolDecoder extends BaseProtocolDecoder {
             .expression("(.*)")                  // cell and wifi
             .compile();
 
-    private void sendResponse(Channel channel, String manufacturer, String id, String content) {
+    private void sendResponse(Channel channel, String id, String index, String content) {
         if (channel != null) {
-            channel.write(String.format(
-                    "[%s*%s*%04x*%s]", manufacturer, id, content.length(), content));
+            if (index != null) {
+                channel.write(String.format(
+                        "[%s*%s*%s*%04x*%s]", manufacturer, id, index, content.length(), content));
+            } else {
+                channel.write(String.format(
+                        "[%s*%s*%04x*%s]", manufacturer, id, content.length(), content));
+            }
         }
     }
 
@@ -92,8 +97,38 @@ public class WatchProtocolDecoder extends BaseProtocolDecoder {
         return null;
     }
 
-    private void decodeTail(Position position, String data) {
-        String[] values = data.split(",");
+    private Position decodePosition(DeviceSession deviceSession, String data) {
+
+        Parser parser = new Parser(PATTERN_POSITION, data);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+        position.set(Position.KEY_RSSI, parser.nextInt(0));
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt(0));
+
+        position.set(Position.KEY_STEPS, parser.nextInt(0));
+
+        int status = parser.nextHexInt(0);
+        position.set(Position.KEY_ALARM, decodeAlarm(status));
+        if (BitUtil.check(status, 4)) {
+            position.set(Position.KEY_MOTION, true);
+        }
+
+        String[] values = parser.next().split(",");
         int index = 0;
 
         Network network = new Network();
@@ -122,6 +157,19 @@ public class WatchProtocolDecoder extends BaseProtocolDecoder {
         if (network.getCellTowers() != null || network.getWifiAccessPoints() != null) {
             position.setNetwork(network);
         }
+
+        return position;
+    }
+
+    private boolean hasIndex;
+    private String manufacturer;
+
+    public boolean getHasIndex() {
+        return hasIndex;
+    }
+
+    public String getManufacturer() {
+        return manufacturer;
     }
 
     @Override
@@ -131,22 +179,34 @@ public class WatchProtocolDecoder extends BaseProtocolDecoder {
         ChannelBuffer buf = (ChannelBuffer) msg;
 
         buf.skipBytes(1); // header
-        String manufacturer = buf.readBytes(2).toString(StandardCharsets.US_ASCII);
+        manufacturer = buf.readBytes(2).toString(StandardCharsets.US_ASCII);
         buf.skipBytes(1); // delimiter
 
-        String id = buf.readBytes(10).toString(StandardCharsets.US_ASCII);
+        int idIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*');
+        String id = buf.readBytes(idIndex - buf.readerIndex()).toString(StandardCharsets.US_ASCII);
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
         if (deviceSession == null) {
             return null;
         }
 
         buf.skipBytes(1); // delimiter
+
+        String index = null;
+        int contentIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*');
+        if (contentIndex + 5 < buf.writerIndex() && buf.getByte(contentIndex + 5) == '*'
+                && buf.toString(contentIndex + 1, 4, StandardCharsets.US_ASCII).matches("\\p{XDigit}+")) {
+            int indexLength = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*') - buf.readerIndex();
+            hasIndex = true;
+            index = buf.readBytes(indexLength).toString(StandardCharsets.US_ASCII);
+            buf.skipBytes(1); // delimiter
+        }
+
         buf.skipBytes(4); // length
         buf.skipBytes(1); // delimiter
 
         buf.writerIndex(buf.writerIndex() - 1); // ignore ending
 
-        int contentIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ',');
+        contentIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ',');
         if (contentIndex < 0) {
             contentIndex = buf.writerIndex();
         }
@@ -157,15 +217,18 @@ public class WatchProtocolDecoder extends BaseProtocolDecoder {
             buf.readerIndex(contentIndex + 1);
         }
 
-        if (type.equals("LK")) {
+        if (type.equals("INIT")) {
+
+            sendResponse(channel, id, index, "INIT,1");
+
+        } else if (type.equals("LK")) {
 
-            sendResponse(channel, manufacturer, id, "LK");
+            sendResponse(channel, id, index, "LK");
 
             if (buf.readable()) {
                 String[] values = buf.toString(StandardCharsets.US_ASCII).split(",");
                 if (values.length >= 3) {
-                    Position position = new Position();
-                    position.setProtocol(getProtocolName());
+                    Position position = new Position(getProtocolName());
                     position.setDeviceId(deviceSession.getDeviceId());
 
                     getLastLocation(position, null);
@@ -179,62 +242,38 @@ public class WatchProtocolDecoder extends BaseProtocolDecoder {
         } else if (type.equals("UD") || type.equals("UD2") || type.equals("UD3")
                 || type.equals("AL") || type.equals("WT")) {
 
-            if (type.equals("AL")) {
-                sendResponse(channel, manufacturer, id, "AL");
-            }
-
-            Parser parser = new Parser(PATTERN_POSITION, buf.toString(StandardCharsets.US_ASCII));
-            if (!parser.matches()) {
-                return null;
-            }
-
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
-            position.setDeviceId(deviceSession.getDeviceId());
-
-            position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+            Position position = decodePosition(deviceSession, buf.toString(StandardCharsets.US_ASCII));
 
-            position.setValid(parser.next().equals("A"));
-            position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
-            position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
-            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
-            position.setCourse(parser.nextDouble(0));
-            position.setAltitude(parser.nextDouble(0));
-
-            position.set(Position.KEY_SATELLITES, parser.nextInt(0));
-            position.set(Position.KEY_RSSI, parser.nextInt(0));
-            position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt(0));
-
-            position.set(Position.KEY_STEPS, parser.nextInt(0));
-
-            int status = parser.nextHexInt(0);
-            position.set(Position.KEY_ALARM, decodeAlarm(status));
-            if (BitUtil.check(status, 4)) {
-                position.set(Position.KEY_MOTION, true);
+            if (type.equals("AL")) {
+                if (position != null) {
+                    position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+                }
+                sendResponse(channel, id, index, "AL");
             }
 
-            decodeTail(position, parser.next());
-
             return position;
 
         } else if (type.equals("TKQ")) {
 
-            sendResponse(channel, manufacturer, id, "TKQ");
+            sendResponse(channel, id, index, "TKQ");
 
-        } else if (type.equals("PULSE") || type.equals("heart")) {
+        } else if (type.equals("PULSE") || type.equals("heart") || type.equals("bphrt")) {
 
             if (buf.readable()) {
 
-                Position position = new Position();
-                position.setProtocol(getProtocolName());
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
 
                 getLastLocation(position, new Date());
 
-                position.setValid(false);
-                String pulse = buf.toString(StandardCharsets.US_ASCII);
-                position.set("pulse", pulse);
-                position.set(Position.KEY_RESULT, pulse);
+                String[] values = buf.toString(StandardCharsets.US_ASCII).split(",");
+                int valueIndex = 0;
+
+                if (type.equals("bphrt")) {
+                    position.set("pressureHigh", values[valueIndex++]);
+                    position.set("pressureLow", values[valueIndex++]);
+                }
+                position.set("pulse", values[valueIndex]);
 
                 return position;
 
@@ -242,8 +281,7 @@ public class WatchProtocolDecoder extends BaseProtocolDecoder {
 
         } else if (type.equals("img")) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             getLastLocation(position, null);
@@ -256,8 +294,7 @@ public class WatchProtocolDecoder extends BaseProtocolDecoder {
 
         } else if (type.equals("TK")) {
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
             getLastLocation(position, null);
diff --git a/src/org/traccar/protocol/WatchProtocolEncoder.java b/src/org/traccar/protocol/WatchProtocolEncoder.java
index d2d3b52d1..4c87f3abd 100644
--- a/src/org/traccar/protocol/WatchProtocolEncoder.java
+++ b/src/org/traccar/protocol/WatchProtocolEncoder.java
@@ -15,11 +15,12 @@
  */
 package org.traccar.protocol;
 
+import org.jboss.netty.channel.Channel;
 import org.traccar.StringProtocolEncoder;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.Log;
 import org.traccar.model.Command;
 
-import javax.xml.bind.DatatypeConverter;
 import java.nio.charset.StandardCharsets;
 import java.text.DecimalFormat;
 import java.text.DecimalFormatSymbols;
@@ -41,12 +42,27 @@ public class WatchProtocolEncoder extends StringProtocolEncoder implements Strin
         return null;
     }
 
+    protected String formatCommand(Channel channel, Command command, String format, String... keys) {
+
+        boolean hasIndex = false;
+        String manufacturer = "CS";
+        if (channel != null) {
+            WatchProtocolDecoder decoder = channel.getPipeline().get(WatchProtocolDecoder.class);
+            if (decoder != null) {
+                hasIndex = decoder.getHasIndex();
+                manufacturer = decoder.getManufacturer();
+            }
+        }
 
-    @Override
-    protected String formatCommand(Command command, String format, String... keys) {
         String content = formatCommand(command, format, this, keys);
-        return String.format("[CS*%s*%04x*%s]",
-                getUniqueId(command.getDeviceId()), content.length(), content);
+
+        if (hasIndex) {
+            return String.format("[%s*%s*0001*%04x*%s]",
+                    manufacturer, getUniqueId(command.getDeviceId()), content.length(), content);
+        } else {
+            return String.format("[%s*%s*%04x*%s]",
+                    manufacturer, getUniqueId(command.getDeviceId()), content.length(), content);
+        }
     }
 
     private int getEnableFlag(Command command) {
@@ -68,7 +84,7 @@ public class WatchProtocolEncoder extends StringProtocolEncoder implements Strin
     }
 
     private String getBinaryData(Command command) {
-        byte[] data = DatatypeConverter.parseHexBinary(command.getString(Command.KEY_DATA));
+        byte[] data = DataConverter.parseHex(command.getString(Command.KEY_DATA));
 
         int encodedLength = data.length;
         for (byte b : data) {
@@ -96,37 +112,37 @@ public class WatchProtocolEncoder extends StringProtocolEncoder implements Strin
     }
 
     @Override
-    protected Object encodeCommand(Command command) {
+    protected Object encodeCommand(Channel channel, Command command) {
 
         switch (command.getType()) {
             case Command.TYPE_CUSTOM:
-                return formatCommand(command, command.getString(Command.KEY_DATA));
+                return formatCommand(channel, command, command.getString(Command.KEY_DATA));
             case Command.TYPE_POSITION_SINGLE:
-                return formatCommand(command, "RG");
+                return formatCommand(channel, command, "RG");
             case Command.TYPE_SOS_NUMBER:
-                return formatCommand(command, "SOS{%s},{%s}", Command.KEY_INDEX, Command.KEY_PHONE);
+                return formatCommand(channel, command, "SOS{%s},{%s}", Command.KEY_INDEX, Command.KEY_PHONE);
             case Command.TYPE_ALARM_SOS:
-                return formatCommand(command, "SOSSMS," + getEnableFlag(command));
+                return formatCommand(channel, command, "SOSSMS," + getEnableFlag(command));
             case Command.TYPE_ALARM_BATTERY:
-                return formatCommand(command, "LOWBAT," + getEnableFlag(command));
+                return formatCommand(channel, command, "LOWBAT," + getEnableFlag(command));
             case Command.TYPE_REBOOT_DEVICE:
-                return formatCommand(command, "RESET");
+                return formatCommand(channel, command, "RESET");
             case Command.TYPE_ALARM_REMOVE:
-                return formatCommand(command, "REMOVE," + getEnableFlag(command));
+                return formatCommand(channel, command, "REMOVE," + getEnableFlag(command));
             case Command.TYPE_SILENCE_TIME:
-                return formatCommand(command, "SILENCETIME,{%s}", Command.KEY_DATA);
+                return formatCommand(channel, command, "SILENCETIME,{%s}", Command.KEY_DATA);
             case Command.TYPE_ALARM_CLOCK:
-                return formatCommand(command, "REMIND,{%s}", Command.KEY_DATA);
+                return formatCommand(channel, command, "REMIND,{%s}", Command.KEY_DATA);
             case Command.TYPE_SET_PHONEBOOK:
-                return formatCommand(command, "PHB,{%s}", Command.KEY_DATA);
+                return formatCommand(channel, command, "PHB,{%s}", Command.KEY_DATA);
             case Command.TYPE_VOICE_MESSAGE:
-                return formatCommand(command, "TK," + getBinaryData(command));
+                return formatCommand(channel, command, "TK," + getBinaryData(command));
             case Command.TYPE_POSITION_PERIODIC:
-                return formatCommand(command, "UPLOAD,{%s}", Command.KEY_FREQUENCY);
+                return formatCommand(channel, command, "UPLOAD,{%s}", Command.KEY_FREQUENCY);
             case Command.TYPE_SET_TIMEZONE:
-                return formatCommand(command, "LZ,,{%s}", Command.KEY_TIMEZONE);
+                return formatCommand(channel, command, "LZ,,{%s}", Command.KEY_TIMEZONE);
             case Command.TYPE_SET_INDICATOR:
-                return formatCommand(command, "FLOWER,{%s}", Command.KEY_DATA);
+                return formatCommand(channel, command, "FLOWER,{%s}", Command.KEY_DATA);
             default:
                 Log.warning(new UnsupportedOperationException(command.getType()));
                 break;
diff --git a/src/org/traccar/protocol/WialonProtocolDecoder.java b/src/org/traccar/protocol/WialonProtocolDecoder.java
index 4eb3b9b8e..5bc3e9972 100644
--- a/src/org/traccar/protocol/WialonProtocolDecoder.java
+++ b/src/org/traccar/protocol/WialonProtocolDecoder.java
@@ -80,8 +80,7 @@ public class WialonProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
@@ -179,8 +178,7 @@ public class WialonProtocolDecoder extends BaseProtocolDecoder {
         } else if (sentence.startsWith("#M#")) {
             DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
             if (deviceSession != null) {
-                Position position = new Position();
-                position.setProtocol(getProtocolName());
+                Position position = new Position(getProtocolName());
                 position.setDeviceId(deviceSession.getDeviceId());
                 getLastLocation(position, new Date());
                 position.setValid(false);
diff --git a/src/org/traccar/protocol/WondexProtocolDecoder.java b/src/org/traccar/protocol/WondexProtocolDecoder.java
index e27745f38..a0fa436e4 100644
--- a/src/org/traccar/protocol/WondexProtocolDecoder.java
+++ b/src/org/traccar/protocol/WondexProtocolDecoder.java
@@ -70,17 +70,17 @@ public class WondexProtocolDecoder extends BaseProtocolDecoder {
             return null;
         } else if (buf.toString(StandardCharsets.US_ASCII).startsWith("$OK:")
                 || buf.toString(StandardCharsets.US_ASCII).startsWith("$ERR:")
-                  || buf.toString(StandardCharsets.US_ASCII).startsWith("$MSG:")) {
+                || buf.toString(StandardCharsets.US_ASCII).startsWith("$MSG:")) {
 
             DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
             getLastLocation(position, new Date());
             position.set(Position.KEY_RESULT, buf.toString(StandardCharsets.US_ASCII));
 
             return position;
+
         } else {
 
             Parser parser = new Parser(PATTERN, buf.toString(StandardCharsets.US_ASCII));
@@ -88,8 +88,7 @@ public class WondexProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
 
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
+            Position position = new Position(getProtocolName());
 
             DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
             if (deviceSession == null) {
@@ -120,6 +119,7 @@ public class WondexProtocolDecoder extends BaseProtocolDecoder {
             position.set(Position.KEY_OUTPUT, parser.next());
 
             return position;
+
         }
 
     }
diff --git a/src/org/traccar/protocol/XexunProtocolDecoder.java b/src/org/traccar/protocol/XexunProtocolDecoder.java
index bb4b4f48c..a06a86021 100644
--- a/src/org/traccar/protocol/XexunProtocolDecoder.java
+++ b/src/org/traccar/protocol/XexunProtocolDecoder.java
@@ -106,8 +106,7 @@ public class XexunProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         if (full) {
             position.set("serial", parser.next());
diff --git a/src/org/traccar/protocol/XirgoProtocolDecoder.java b/src/org/traccar/protocol/XirgoProtocolDecoder.java
index b1442170d..461503af1 100644
--- a/src/org/traccar/protocol/XirgoProtocolDecoder.java
+++ b/src/org/traccar/protocol/XirgoProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -95,6 +95,71 @@ public class XirgoProtocolDecoder extends BaseProtocolDecoder {
             .any()
             .compile();
 
+    private void decodeEvent(Position position, int event) {
+
+        position.set(Position.KEY_EVENT, event);
+
+        switch (event) {
+            case 4001:
+            case 4003:
+            case 6011:
+            case 6013:
+                position.set(Position.KEY_IGNITION, true);
+                break;
+            case 4002:
+            case 4004:
+            case 6012:
+            case 6014:
+                position.set(Position.KEY_IGNITION, false);
+                break;
+            case 4005:
+                position.set(Position.KEY_CHARGE, false);
+                break;
+            case 6002:
+                position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
+                break;
+            case 6006:
+                position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+                break;
+            case 6007:
+                position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+                break;
+            case 6008:
+                position.set(Position.KEY_ALARM, Position.ALARM_LOW_POWER);
+                break;
+            case 6009:
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_CUT);
+                break;
+            case 6010:
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_RESTORED);
+                break;
+            case 6016:
+                position.set(Position.KEY_ALARM, Position.ALARM_IDLE);
+                break;
+            case 6017:
+                position.set(Position.KEY_ALARM, Position.ALARM_TOW);
+                break;
+            case 6030:
+            case 6071:
+                position.set(Position.KEY_MOTION, true);
+                break;
+            case 6031:
+                position.set(Position.KEY_MOTION, false);
+                break;
+            case 6032:
+                position.set(Position.KEY_ALARM, Position.ALARM_PARKING);
+                break;
+            case 6090:
+                position.set(Position.KEY_ALARM, Position.ALARM_REMOVING);
+                break;
+            case 6091:
+                position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
+                break;
+            default:
+                break;
+        }
+    }
+
     @Override
     protected Object decode(
             Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
@@ -125,8 +190,7 @@ public class XirgoProtocolDecoder extends BaseProtocolDecoder {
             }
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
@@ -134,7 +198,7 @@ public class XirgoProtocolDecoder extends BaseProtocolDecoder {
         }
         position.setDeviceId(deviceSession.getDeviceId());
 
-        position.set(Position.KEY_EVENT, parser.next());
+        decodeEvent(position, parser.nextInt());
 
         position.setTime(parser.nextDateTime());
 
diff --git a/src/org/traccar/protocol/Xt013ProtocolDecoder.java b/src/org/traccar/protocol/Xt013ProtocolDecoder.java
index f1214fdb4..a92afd778 100644
--- a/src/org/traccar/protocol/Xt013ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Xt013ProtocolDecoder.java
@@ -65,8 +65,7 @@ public class Xt013ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
diff --git a/src/org/traccar/protocol/Xt2400ProtocolDecoder.java b/src/org/traccar/protocol/Xt2400ProtocolDecoder.java
index 15e8558be..1be943e98 100644
--- a/src/org/traccar/protocol/Xt2400ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Xt2400ProtocolDecoder.java
@@ -20,10 +20,10 @@ import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
 import org.traccar.Context;
 import org.traccar.DeviceSession;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.UnitsConverter;
 import org.traccar.model.Position;
 
-import javax.xml.bind.DatatypeConverter;
 import java.net.SocketAddress;
 import java.nio.charset.StandardCharsets;
 import java.util.Date;
@@ -95,7 +95,7 @@ public class Xt2400ProtocolDecoder extends BaseProtocolDecoder {
         Pattern pattern = Pattern.compile(":wycfg pcr\\[\\d+\\] ([0-9a-fA-F]{2})[0-9a-fA-F]{2}([0-9a-fA-F]+)");
         Matcher matcher = pattern.matcher(configString);
         while (matcher.find()) {
-            formats.put(Short.parseShort(matcher.group(1), 16), DatatypeConverter.parseHexBinary(matcher.group(2)));
+            formats.put(Short.parseShort(matcher.group(1), 16), DataConverter.parseHex(matcher.group(2)));
         }
     }
 
@@ -116,11 +116,10 @@ public class Xt2400ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         for (byte tag : format) {
-            switch ((int) tag) {
+            switch (tag) {
                 case 0x03:
                     DeviceSession deviceSession = getDeviceSession(
                             channel, remoteAddress, String.valueOf(buf.readUnsignedInt()));
diff --git a/src/org/traccar/protocol/YwtProtocolDecoder.java b/src/org/traccar/protocol/YwtProtocolDecoder.java
index 6a98ab9e7..3182b838d 100644
--- a/src/org/traccar/protocol/YwtProtocolDecoder.java
+++ b/src/org/traccar/protocol/YwtProtocolDecoder.java
@@ -76,8 +76,7 @@ public class YwtProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        Position position = new Position();
-        position.setProtocol(getProtocolName());
+        Position position = new Position(getProtocolName());
 
         String type = parser.next();
 
diff --git a/src/org/traccar/reports/Events.java b/src/org/traccar/reports/Events.java
index a13aeeeb4..66d9e708d 100644
--- a/src/org/traccar/reports/Events.java
+++ b/src/org/traccar/reports/Events.java
@@ -1,6 +1,6 @@
 /*
- * Copyright 2016 Anton Tananaev (anton@traccar.org)
- * Copyright 2016 Andrey Kunitsyn (andrey@traccar.org)
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2018 Andrey Kunitsyn (andrey@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -33,6 +33,7 @@ import org.traccar.model.Device;
 import org.traccar.model.Event;
 import org.traccar.model.Geofence;
 import org.traccar.model.Group;
+import org.traccar.model.Maintenance;
 import org.traccar.reports.model.DeviceReport;
 
 public final class Events {
@@ -51,7 +52,10 @@ public final class Events {
             for (Event event : events) {
                 if (all || types.contains(event.getType())) {
                     long geofenceId = event.getGeofenceId();
-                    if (geofenceId == 0 || Context.getGeofenceManager().checkItemPermission(userId, geofenceId)) {
+                    long maintenanceId = event.getMaintenanceId();
+                    if ((geofenceId == 0 || Context.getGeofenceManager().checkItemPermission(userId, geofenceId))
+                            && (maintenanceId == 0
+                            || Context.getMaintenancesManager().checkItemPermission(userId, maintenanceId))) {
                        result.add(event);
                     }
                 }
@@ -67,6 +71,7 @@ public final class Events {
         ArrayList<DeviceReport> devicesEvents = new ArrayList<>();
         ArrayList<String> sheetNames = new ArrayList<>();
         HashMap<Long, String> geofenceNames = new HashMap<>();
+        HashMap<Long, String> maintenanceNames = new HashMap<>();
         for (long deviceId: ReportUtils.getDeviceList(deviceIds, groupIds)) {
             Context.getPermissionsManager().checkDevice(userId, deviceId);
             Collection<Event> events = Context.getDataManager().getEvents(deviceId, from, to);
@@ -75,15 +80,25 @@ public final class Events {
                 Event event = iterator.next();
                 if (all || types.contains(event.getType())) {
                     long geofenceId = event.getGeofenceId();
+                    long maintenanceId = event.getMaintenanceId();
                     if (geofenceId != 0) {
                         if (Context.getGeofenceManager().checkItemPermission(userId, geofenceId)) {
-                            Geofence geofence = (Geofence) Context.getGeofenceManager().getById(geofenceId);
+                            Geofence geofence = Context.getGeofenceManager().getById(geofenceId);
                             if (geofence != null) {
                                 geofenceNames.put(geofenceId, geofence.getName());
                             }
                         } else {
                             iterator.remove();
                         }
+                    } else if (maintenanceId != 0) {
+                        if (Context.getMaintenancesManager().checkItemPermission(userId, maintenanceId)) {
+                            Maintenance maintenance = Context.getMaintenancesManager().getById(maintenanceId);
+                            if (maintenance != null) {
+                                maintenanceNames.put(maintenanceId, maintenance.getName());
+                            }
+                        } else {
+                            iterator.remove();
+                        }
                     }
                 } else {
                     iterator.remove();
@@ -109,6 +124,7 @@ public final class Events {
             jxlsContext.putVar("devices", devicesEvents);
             jxlsContext.putVar("sheetNames", sheetNames);
             jxlsContext.putVar("geofenceNames", geofenceNames);
+            jxlsContext.putVar("maintenanceNames", maintenanceNames);
             jxlsContext.putVar("from", from);
             jxlsContext.putVar("to", to);
             ReportUtils.processTemplateWithSheets(inputStream, outputStream, jxlsContext);
diff --git a/src/org/traccar/reports/Stops.java b/src/org/traccar/reports/Stops.java
index 14b3a2437..aa7a1ef20 100644
--- a/src/org/traccar/reports/Stops.java
+++ b/src/org/traccar/reports/Stops.java
@@ -42,11 +42,9 @@ public final class Stops {
         boolean ignoreOdometer = Context.getDeviceManager()
                 .lookupAttributeBoolean(deviceId, "report.ignoreOdometer", false, true);
 
-        Collection<StopReport> result = ReportUtils.detectTripsAndStops(
+        return ReportUtils.detectTripsAndStops(
                 Context.getDataManager().getPositions(deviceId, from, to),
                 Context.getTripsConfig(), ignoreOdometer, StopReport.class);
-
-        return result;
     }
 
     public static Collection<StopReport> getObjects(
diff --git a/src/org/traccar/reports/Trips.java b/src/org/traccar/reports/Trips.java
index 696defa94..792833c27 100644
--- a/src/org/traccar/reports/Trips.java
+++ b/src/org/traccar/reports/Trips.java
@@ -41,11 +41,9 @@ public final class Trips {
         boolean ignoreOdometer = Context.getDeviceManager()
                 .lookupAttributeBoolean(deviceId, "report.ignoreOdometer", false, true);
 
-        Collection<TripReport> result = ReportUtils.detectTripsAndStops(
+        return ReportUtils.detectTripsAndStops(
                 Context.getDataManager().getPositions(deviceId, from, to),
                 Context.getTripsConfig(), ignoreOdometer, TripReport.class);
-
-        return result;
     }
 
     public static Collection<TripReport> getObjects(long userId, Collection<Long> deviceIds, Collection<Long> groupIds,
diff --git a/src/org/traccar/reports/model/StopReport.java b/src/org/traccar/reports/model/StopReport.java
index 6b2e86299..245292b63 100644
--- a/src/org/traccar/reports/model/StopReport.java
+++ b/src/org/traccar/reports/model/StopReport.java
@@ -53,37 +53,21 @@ public class StopReport extends BaseReport  {
     private Date startTime;
 
     public Date getStartTime() {
-        if (startTime != null) {
-            return new Date(startTime.getTime());
-        } else {
-            return null;
-        }
+        return startTime;
     }
 
     public void setStartTime(Date startTime) {
-        if (startTime != null) {
-            this.startTime = new Date(startTime.getTime());
-        } else {
-            this.startTime = null;
-        }
+        this.startTime = startTime;
     }
 
     private Date endTime;
 
     public Date getEndTime() {
-        if (endTime != null) {
-            return new Date(endTime.getTime());
-        } else {
-            return null;
-        }
+        return endTime;
     }
 
     public void setEndTime(Date endTime) {
-        if (endTime != null) {
-            this.endTime = new Date(endTime.getTime());
-        } else {
-            this.endTime = null;
-        }
+        this.endTime = endTime;
     }
 
     private String address;
diff --git a/src/org/traccar/reports/model/TripReport.java b/src/org/traccar/reports/model/TripReport.java
index 42a4240b7..3140f3019 100644
--- a/src/org/traccar/reports/model/TripReport.java
+++ b/src/org/traccar/reports/model/TripReport.java
@@ -83,19 +83,11 @@ public class TripReport extends BaseReport {
     private Date startTime;
 
     public Date getStartTime() {
-        if (startTime != null) {
-            return new Date(startTime.getTime());
-        } else {
-            return null;
-        }
+        return startTime;
     }
 
     public void setStartTime(Date startTime) {
-        if (startTime != null) {
-            this.startTime = new Date(startTime.getTime());
-        } else {
-            this.startTime = null;
-        }
+        this.startTime = startTime;
     }
 
     private String startAddress;
@@ -111,19 +103,11 @@ public class TripReport extends BaseReport {
     private Date endTime;
 
     public Date getEndTime() {
-        if (endTime != null) {
-            return new Date(endTime.getTime());
-        } else {
-            return null;
-        }
+        return endTime;
     }
 
     public void setEndTime(Date endTime) {
-        if (endTime != null) {
-            this.endTime = new Date(endTime.getTime());
-        } else {
-            this.endTime = null;
-        }
+        this.endTime = endTime;
     }
 
     private String endAddress;
diff --git a/src/org/traccar/smpp/ClientSmppSessionHandler.java b/src/org/traccar/smpp/ClientSmppSessionHandler.java
index 77f75273e..3585f8376 100644
--- a/src/org/traccar/smpp/ClientSmppSessionHandler.java
+++ b/src/org/traccar/smpp/ClientSmppSessionHandler.java
@@ -25,6 +25,7 @@ import com.cloudhopper.smpp.impl.DefaultSmppSessionHandler;
 import com.cloudhopper.smpp.pdu.DeliverSm;
 import com.cloudhopper.smpp.pdu.PduRequest;
 import com.cloudhopper.smpp.pdu.PduResponse;
+import com.cloudhopper.smpp.util.SmppUtil;
 
 public class ClientSmppSessionHandler extends DefaultSmppSessionHandler {
 
@@ -44,16 +45,19 @@ public class ClientSmppSessionHandler extends DefaultSmppSessionHandler {
         PduResponse response = null;
         try {
             if (request instanceof DeliverSm) {
-                if (request.getOptionalParameters() != null) {
-                    Log.debug("SMS Message Delivered: "
-                            + request.getOptionalParameter(SmppConstants.TAG_RECEIPTED_MSG_ID).getValueAsString()
-                            + ", State: "
-                            + request.getOptionalParameter(SmppConstants.TAG_MSG_STATE).getValueAsByte());
+                String sourceAddress = ((DeliverSm) request).getSourceAddress().getAddress();
+                String message = CharsetUtil.decode(((DeliverSm) request).getShortMessage(),
+                        smppClient.mapDataCodingToCharset(((DeliverSm) request).getDataCoding()));
+                Log.debug("SMS Message Received: " + message.trim() + ", Source Address: " + sourceAddress);
+
+                boolean isDeliveryReceipt = false;
+                if (smppClient.getDetectDlrByOpts()) {
+                    isDeliveryReceipt = request.getOptionalParameters() != null;
                 } else {
-                    String sourceAddress = ((DeliverSm) request).getSourceAddress().getAddress();
-                    String message = CharsetUtil.decode(((DeliverSm) request).getShortMessage(),
-                            smppClient.mapDataCodingToCharset(((DeliverSm) request).getDataCoding()));
-                    Log.debug("SMS Message Received: " + message.trim() + ", Source Address: " + sourceAddress);
+                    isDeliveryReceipt = SmppUtil.isMessageTypeAnyDeliveryReceipt(((DeliverSm) request).getEsmClass());
+                }
+
+                if (!isDeliveryReceipt) {
                     TextMessageEventHandler.handleTextMessage(sourceAddress, message);
                 }
             }
diff --git a/src/org/traccar/smpp/SmppClient.java b/src/org/traccar/smpp/SmppClient.java
index 122bbaea1..bf395f90e 100644
--- a/src/org/traccar/smpp/SmppClient.java
+++ b/src/org/traccar/smpp/SmppClient.java
@@ -1,6 +1,6 @@
 /*
- * Copyright 2017 Anton Tananaev (anton@traccar.org)
- * Copyright 2017 Andrey Kunitsyn (andrey@traccar.org)
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 - 2018 Andrey Kunitsyn (andrey@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,6 +35,7 @@ import com.cloudhopper.smpp.impl.DefaultSmppClient;
 import com.cloudhopper.smpp.impl.DefaultSmppSessionHandler;
 import com.cloudhopper.smpp.pdu.SubmitSm;
 import com.cloudhopper.smpp.pdu.SubmitSmResp;
+import com.cloudhopper.smpp.tlv.Tlv;
 import com.cloudhopper.smpp.type.Address;
 import com.cloudhopper.smpp.type.RecoverablePduException;
 import com.cloudhopper.smpp.type.SmppChannelException;
@@ -61,6 +62,8 @@ public class SmppClient {
     private String sourceAddress;
     private String commandSourceAddress;
     private int submitTimeout;
+    private boolean requestDlr;
+    private boolean detectDlrByOpts;
     private String notificationsCharsetName;
     private byte notificationsDataCoding;
     private String commandsCharsetName;
@@ -82,6 +85,7 @@ public class SmppClient {
         sessionConfig.setHost(Context.getConfig().getString("sms.smpp.host", "localhost"));
         sessionConfig.setPort(Context.getConfig().getInteger("sms.smpp.port", 2775));
         sessionConfig.setSystemId(Context.getConfig().getString("sms.smpp.username", "user"));
+        sessionConfig.setSystemType(Context.getConfig().getString("sms.smpp.systemType", null));
         sessionConfig.setPassword(Context.getConfig().getString("sms.smpp.password", "password"));
         sessionConfig.getLoggingOptions().setLogBytes(false);
         sessionConfig.getLoggingOptions().setLogPdu(Context.getConfig().getBoolean("sms.smpp.logPdu"));
@@ -90,6 +94,9 @@ public class SmppClient {
         commandSourceAddress = Context.getConfig().getString("sms.smpp.commandSourceAddress", sourceAddress);
         submitTimeout = Context.getConfig().getInteger("sms.smpp.submitTimeout", 10000);
 
+        requestDlr = Context.getConfig().getBoolean("sms.smpp.requestDlr");
+        detectDlrByOpts = Context.getConfig().getBoolean("sms.smpp.detectDlrByOpts");
+
         notificationsCharsetName = Context.getConfig().getString("sms.smpp.notificationsCharset",
                 CharsetUtil.NAME_UCS_2);
         notificationsDataCoding = (byte) Context.getConfig().getInteger("sms.smpp.notificationsDataCoding",
@@ -149,6 +156,10 @@ public class SmppClient {
         }
     }
 
+    public boolean getDetectDlrByOpts() {
+        return detectDlrByOpts;
+    }
+
     protected synchronized void reconnect() {
         try {
             disconnect();
@@ -209,7 +220,16 @@ public class SmppClient {
             byte[] textBytes;
             textBytes = CharsetUtil.encode(message, command ? commandsCharsetName : notificationsCharsetName);
             submit.setDataCoding(command ? commandsDataCoding : notificationsDataCoding);
-            submit.setShortMessage(textBytes);
+            if (requestDlr) {
+                submit.setRegisteredDelivery(SmppConstants.REGISTERED_DELIVERY_SMSC_RECEIPT_REQUESTED);
+            }
+
+            if (textBytes != null && textBytes.length > 255) {
+                submit.addOptionalParameter(new Tlv(SmppConstants.TAG_MESSAGE_PAYLOAD, textBytes, "message_payload"));
+            } else {
+                submit.setShortMessage(textBytes);
+            }
+
             submit.setSourceAddress(command ? new Address(commandSourceTon, commandSourceNpi, commandSourceAddress)
                     : new Address(sourceTon, sourceNpi, sourceAddress));
             submit.setDestAddress(new Address(destTon, destNpi, destAddress));
diff --git a/src/org/traccar/web/CsvBuilder.java b/src/org/traccar/web/CsvBuilder.java
index 31b389873..fa99f1b18 100644
--- a/src/org/traccar/web/CsvBuilder.java
+++ b/src/org/traccar/web/CsvBuilder.java
@@ -51,7 +51,7 @@ public class CsvBuilder {
 
     private SortedSet<Method> getSortedMethods(Object object) {
         Method[] methodArray = object.getClass().getMethods();
-        SortedSet<Method> methods = new TreeSet<Method>(new Comparator<Method>() {
+        SortedSet<Method> methods = new TreeSet<>(new Comparator<Method>() {
             @Override
             public int compare(Method m1, Method m2) {
                 if (m1.getName().equals("getAttributes") && !m1.getName().equals(m2.getName())) {
@@ -75,16 +75,16 @@ public class CsvBuilder {
             if (method.getName().startsWith("get") && method.getParameterTypes().length == 0) {
                 try {
                     if (method.getReturnType().equals(boolean.class)) {
-                        builder.append((Boolean) method.invoke(object));
+                        builder.append(method.invoke(object));
                         addSeparator();
                     } else if (method.getReturnType().equals(int.class)) {
-                        builder.append((Integer) method.invoke(object));
+                        builder.append(method.invoke(object));
                         addSeparator();
                     } else if (method.getReturnType().equals(long.class)) {
-                        builder.append((Long) method.invoke(object));
+                        builder.append(method.invoke(object));
                         addSeparator();
                     } else if (method.getReturnType().equals(double.class)) {
-                        builder.append((Double) method.invoke(object));
+                        builder.append(method.invoke(object));
                         addSeparator();
                     } else if (method.getReturnType().equals(String.class)) {
                         builder.append((String) method.invoke(object));
diff --git a/src/org/traccar/web/WebServer.java b/src/org/traccar/web/WebServer.java
index e145ff554..13eebf34f 100644
--- a/src/org/traccar/web/WebServer.java
+++ b/src/org/traccar/web/WebServer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,6 +25,7 @@ import org.eclipse.jetty.server.handler.ErrorHandler;
 import org.eclipse.jetty.server.handler.HandlerList;
 import org.eclipse.jetty.server.handler.ResourceHandler;
 import org.eclipse.jetty.server.session.HashSessionManager;
+import org.eclipse.jetty.servlet.DefaultServlet;
 import org.eclipse.jetty.servlet.ServletContextHandler;
 import org.eclipse.jetty.servlet.ServletHolder;
 import org.eclipse.jetty.webapp.WebAppContext;
@@ -35,6 +36,7 @@ import org.traccar.Config;
 import org.traccar.Context;
 import org.traccar.api.AsyncSocketServlet;
 import org.traccar.api.CorsResponseFilter;
+import org.traccar.api.MediaFilter;
 import org.traccar.api.ObjectMapperProvider;
 import org.traccar.api.ResourceErrorHandler;
 import org.traccar.api.SecurityRequestFilter;
@@ -42,6 +44,7 @@ import org.traccar.api.resource.ServerResource;
 import org.traccar.helper.Log;
 
 import javax.naming.InitialContext;
+import javax.servlet.DispatcherType;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
@@ -49,6 +52,7 @@ import javax.sql.DataSource;
 import java.io.IOException;
 import java.io.Writer;
 import java.net.InetSocketAddress;
+import java.util.EnumSet;
 
 public class WebServer {
 
@@ -163,11 +167,19 @@ public class WebServer {
 
         servletHandler.addServlet(new ServletHolder(new AsyncSocketServlet()), "/socket");
 
+        if (config.hasKey("media.path")) {
+            ServletHolder servletHolder = new ServletHolder("media", DefaultServlet.class);
+            servletHolder.setInitParameter("resourceBase", config.getString("media.path"));
+            servletHolder.setInitParameter("dirAllowed", config.getString("media.dirAllowed", "false"));
+            servletHolder.setInitParameter("pathInfoOnly", "true");
+            servletHandler.addServlet(servletHolder, "/media/*");
+            servletHandler.addFilter(MediaFilter.class, "/media/*", EnumSet.allOf(DispatcherType.class));
+        }
+
         ResourceConfig resourceConfig = new ResourceConfig();
         resourceConfig.registerClasses(JacksonFeature.class, ObjectMapperProvider.class, ResourceErrorHandler.class);
         resourceConfig.registerClasses(SecurityRequestFilter.class, CorsResponseFilter.class);
         resourceConfig.packages(ServerResource.class.getPackage().getName());
-
         servletHandler.addServlet(new ServletHolder(new ServletContainer(resourceConfig)), "/*");
 
         handlers.addHandler(servletHandler);