Allow optional primitives

92 files changed, 913 insertions, 856 deletions

diff --git a/src/org/traccar/helper/Parser.java b/src/org/traccar/helper/Parser.java
index 2253b79fc..69c80adb2 100644
--- a/src/org/traccar/helper/Parser.java
+++ b/src/org/traccar/helper/Parser.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 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.
@@ -61,35 +61,71 @@ public class Parser {
         return matcher.group(position++);
     }
 
-    public int nextInt() {
-        return nextInt(10);
+    public Integer nextInt() {
+        if (hasNext()) {
+            return Integer.parseInt(next());
+        } else {
+            return null;
+        }
+    }
+
+    public int nextInt(int defaultValue) {
+        if (hasNext()) {
+            return Integer.parseInt(next());
+        } else {
+            return defaultValue;
+        }
+    }
+
+    public Integer nextHexInt() {
+        if (hasNext()) {
+            return Integer.parseInt(next(), 16);
+        } else {
+            return null;
+        }
+    }
+
+    public int nextHexInt(int defaultValue) {
+        if (hasNext()) {
+            return Integer.parseInt(next(), 16);
+        } else {
+            return defaultValue;
+        }
     }
 
-    public int nextInt(int radix) {
+    public Integer nextBinInt() {
         if (hasNext()) {
-            return Integer.parseInt(next(), radix);
+            return Integer.parseInt(next(), 2);
         } else {
-            return 0;
+            return null;
         }
     }
 
-    public long nextLong() {
-        return nextLong(10);
+    public int nextBinInt(int defaultValue) {
+        if (hasNext()) {
+            return Integer.parseInt(next(), 2);
+        } else {
+            return defaultValue;
+        }
+    }
+
+    public long nextLong(long defaultValue) {
+        return nextLong(10, defaultValue);
     }
 
-    public long nextLong(int radix) {
+    public long nextLong(int radix, long defaultValue) {
         if (hasNext()) {
             return Long.parseLong(next(), radix);
         } else {
-            return 0;
+            return defaultValue;
         }
     }
 
-    public double nextDouble() {
+    public double nextDouble(double defaultValue) {
         if (hasNext()) {
             return Double.parseDouble(next());
         } else {
-            return 0.0;
+            return defaultValue;
         }
     }
 
@@ -114,44 +150,44 @@ public class Parser {
                 coordinate = Double.parseDouble(next() + '.' + next());
                 break;
             case DEG_HEM:
-                coordinate = nextDouble();
+                coordinate = nextDouble(0);
                 hemisphere = next();
                 break;
             case DEG_MIN_MIN:
-                coordinate = nextInt();
+                coordinate = nextInt(0);
                 coordinate += Double.parseDouble(next() + '.' + next()) / 60;
                 break;
             case DEG_MIN_MIN_HEM:
-                coordinate = nextInt();
+                coordinate = nextInt(0);
                 coordinate += Double.parseDouble(next() + '.' + next()) / 60;
                 hemisphere = next();
                 break;
             case HEM_DEG:
                 hemisphere = next();
-                coordinate = nextDouble();
+                coordinate = nextDouble(0);
                 break;
             case HEM_DEG_MIN:
                 hemisphere = next();
-                coordinate = nextInt();
-                coordinate += nextDouble() / 60;
+                coordinate = nextInt(0);
+                coordinate += nextDouble(0) / 60;
                 break;
             case HEM_DEG_MIN_HEM:
                 hemisphere = next();
-                coordinate = nextInt();
-                coordinate += nextDouble() / 60;
+                coordinate = nextInt(0);
+                coordinate += nextDouble(0) / 60;
                 if (hasNext()) {
                     hemisphere = next();
                 }
                 break;
             case HEM_DEG_MIN_MIN:
                 hemisphere = next();
-                coordinate = nextInt();
+                coordinate = nextInt(0);
                 coordinate += Double.parseDouble(next() + '.' + next()) / 60;
                 break;
             case DEG_MIN_HEM:
             default:
-                coordinate = nextInt();
-                coordinate += nextDouble() / 60;
+                coordinate = nextInt(0);
+                coordinate += nextDouble(0) / 60;
                 hemisphere = next();
                 break;
         }
@@ -168,77 +204,108 @@ public class Parser {
     }
 
     public enum DateTimeFormat {
-        HMS,         // HHMMSS
-        SMH,         // SSMMHH
-
-        HMS_YMD,     // HHMMSSYYYYMMDD      or  HHMMSSYYMMDD
-        HMS_DMY,     // HHMMSSDDMMYYYY      or  HHMMSSDDMMYY
-        SMH_YMD,     // SSMMHHYYYYMMDD      or  SSMMHHYYMMDD
-        SMH_DMY,     // SSMMHHDDMMYYYY      or  SSMMHHDDMMYY
-
-        DMY_HMS,     // DDMMYYYYHHMMSS      or  DDMMYYHHMMSS
-        DMY_HMSS,    // DDMMYYYYHHMMSS.sss  or  DDMMYYHHMMSS.sss
-        YMD_HMS,     // YYYYMMDDHHMMSS      or  YYMMDDHHMMSS
-        YMD_HMSS,    // YYYYMMDDHHMMSS.sss  or  YYMMDDHHMMSS.sss
+        HMS,
+        SMH,
+        HMS_YMD,
+        HMS_DMY,
+        SMH_YMD,
+        SMH_DMY,
+        DMY_HMS,
+        DMY_HMSS,
+        YMD_HMS,
+        YMD_HMSS,
     }
 
-    private static final DateTimeFormat DEFAULT_FORMAT = DateTimeFormat.YMD_HMS;
-    private static final String DEFAULT_TZ = "UTC";
-    private static final int DEFAULT_RADIX = 10;
-
-    public Date nextDateTime(DateTimeFormat format, String tz, int radix) {
+    public Date nextDateTime(DateTimeFormat format, String timeZone) {
         int year = 0, month = 0, day = 0;
         int hour = 0, minute = 0, second = 0, millisecond = 0;
-        TimeZone timeZone = TimeZone.getTimeZone(tz);
 
         switch (format) {
             case HMS:
-                hour = nextInt(radix); minute = nextInt(radix); second = nextInt(radix);
+                hour = nextInt(0);
+                minute = nextInt(0);
+                second = nextInt(0);
                 break;
             case SMH:
-                second = nextInt(radix); minute = nextInt(radix); hour = nextInt(radix);
+                second = nextInt(0);
+                minute = nextInt(0);
+                hour = nextInt(0);
                 break;
             case HMS_YMD:
-                hour = nextInt(radix); minute = nextInt(radix); second = nextInt(radix);
-                year = nextInt(radix); month = nextInt(radix); day = nextInt(radix);
+                hour = nextInt(0);
+                minute = nextInt(0);
+                second = nextInt(0);
+                year = nextInt(0);
+                month = nextInt(0);
+                day = nextInt(0);
                 break;
             case HMS_DMY:
-                hour = nextInt(radix); minute = nextInt(radix); second = nextInt(radix);
-                day = nextInt(radix); month = nextInt(radix); year = nextInt(radix);
+                hour = nextInt(0);
+                minute = nextInt(0);
+                second = nextInt(0);
+                day = nextInt(0);
+                month = nextInt(0);
+                year = nextInt(0);
                 break;
             case SMH_YMD:
-                second = nextInt(radix); minute = nextInt(radix); hour = nextInt(radix);
-                year = nextInt(radix); month = nextInt(radix); day = nextInt(radix);
+                second = nextInt(0);
+                minute = nextInt(0);
+                hour = nextInt(0);
+                year = nextInt(0);
+                month = nextInt(0);
+                day = nextInt(0);
                 break;
             case SMH_DMY:
-                second = nextInt(radix); minute = nextInt(radix); hour = nextInt(radix);
-                day = nextInt(radix); month = nextInt(radix); year = nextInt(radix);
+                second = nextInt(0);
+                minute = nextInt(0);
+                hour = nextInt(0);
+                day = nextInt(0);
+                month = nextInt(0);
+                year = nextInt(0);
                 break;
             case DMY_HMS:
             case DMY_HMSS:
-                day = nextInt(radix); month = nextInt(radix); year = nextInt(radix);
-                hour = nextInt(radix); minute = nextInt(radix); second = nextInt(radix);
+                day = nextInt(0);
+                month = nextInt(0);
+                year = nextInt(0);
+                hour = nextInt(0);
+                minute = nextInt(0);
+                second = nextInt(0);
                 break;
             case YMD_HMS:
             case YMD_HMSS:
             default:
-                year = nextInt(radix); month = nextInt(radix); day = nextInt(radix);
-                hour = nextInt(radix); minute = nextInt(radix); second = nextInt(radix);
+                year = nextInt(0);
+                month = nextInt(0);
+                day = nextInt(0);
+                hour = nextInt(0);
+                minute = nextInt(0);
+                second = nextInt(0);
                 break;
         }
 
         if (format == DateTimeFormat.YMD_HMSS || format == DateTimeFormat.DMY_HMSS) {
-                millisecond = nextInt(radix); // (ddd)
+            millisecond = nextInt(0); // (ddd)
         }
 
         if (year >= 0 && year < 100) {
             year += 2000;
         }
 
-        DateBuilder dateBuilder = new DateBuilder(timeZone);
-
-        if (format != DateTimeFormat.HMS || format != DateTimeFormat.SMH) {
-                dateBuilder.setDate(year, month, day);
+        DateBuilder dateBuilder;
+        if (format != DateTimeFormat.HMS && format != DateTimeFormat.SMH) {
+            if (timeZone != null) {
+                dateBuilder = new DateBuilder(TimeZone.getTimeZone(timeZone));
+            } else {
+                dateBuilder = new DateBuilder();
+            }
+            dateBuilder.setDate(year, month, day);
+        } else {
+            if (timeZone != null) {
+                dateBuilder = new DateBuilder(new Date(), TimeZone.getTimeZone(timeZone));
+            } else {
+                dateBuilder = new DateBuilder(new Date());
+            }
         }
 
         dateBuilder.setTime(hour, minute, second, millisecond);
@@ -246,32 +313,12 @@ public class Parser {
         return dateBuilder.getDate();
     }
 
-    public Date nextDateTime(String tz, int radix) {
-        return nextDateTime(DEFAULT_FORMAT, tz, radix);
-    }
-
-    public Date nextDateTime(DateTimeFormat format, int radix) {
-        return nextDateTime(format, DEFAULT_TZ, radix);
-    }
-
-    public Date nextDateTime(DateTimeFormat format, String tz) {
-        return nextDateTime(format, tz, DEFAULT_RADIX);
-    }
-
     public Date nextDateTime(DateTimeFormat format) {
-        return nextDateTime(format, DEFAULT_TZ, DEFAULT_RADIX);
-    }
-
-    public Date nextDateTime(String tz) {
-        return nextDateTime(DEFAULT_FORMAT, tz, DEFAULT_RADIX);
-    }
-
-    public Date nextDateTime(int radix) {
-        return nextDateTime(DEFAULT_FORMAT, DEFAULT_TZ, radix);
+        return nextDateTime(format, null);
     }
 
     public Date nextDateTime() {
-        return nextDateTime(DEFAULT_FORMAT, DEFAULT_TZ, DEFAULT_RADIX);
+        return nextDateTime(DateTimeFormat.YMD_HMS, null);
     }
 
 }
diff --git a/src/org/traccar/protocol/AisProtocolDecoder.java b/src/org/traccar/protocol/AisProtocolDecoder.java
index f04c558c2..1f7a12595 100644
--- a/src/org/traccar/protocol/AisProtocolDecoder.java
+++ b/src/org/traccar/protocol/AisProtocolDecoder.java
@@ -103,9 +103,9 @@ public class AisProtocolDecoder extends BaseProtocolDecoder {
                 Parser parser = new Parser(PATTERN, sentence);
                 if (parser.matches()) {
 
-                    int count = parser.nextInt();
-                    int index = parser.nextInt();
-                    int id = parser.nextInt();
+                    int count = parser.nextInt(0);
+                    int index = parser.nextInt(0);
+                    int id = parser.nextInt(0);
 
                     Position position = null;
 
diff --git a/src/org/traccar/protocol/AppelloProtocolDecoder.java b/src/org/traccar/protocol/AppelloProtocolDecoder.java
index 38f4315de..30dec3941 100644
--- a/src/org/traccar/protocol/AppelloProtocolDecoder.java
+++ b/src/org/traccar/protocol/AppelloProtocolDecoder.java
@@ -75,14 +75,14 @@ public class AppelloProtocolDecoder extends BaseProtocolDecoder {
             getLastLocation(position, null);
         }
 
-        position.setLatitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
 
-        position.setAltitude(parser.nextDouble());
+        position.setAltitude(parser.nextDouble(0));
 
         position.setValid(parser.next().equals("F"));
 
diff --git a/src/org/traccar/protocol/AquilaProtocolDecoder.java b/src/org/traccar/protocol/AquilaProtocolDecoder.java
index 5f421727f..9c7b1bb12 100644
--- a/src/org/traccar/protocol/AquilaProtocolDecoder.java
+++ b/src/org/traccar/protocol/AquilaProtocolDecoder.java
@@ -142,20 +142,20 @@ public class AquilaProtocolDecoder extends BaseProtocolDecoder {
         position.setProtocol(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
-        position.set(Position.KEY_EVENT, parser.nextInt());
+        position.set(Position.KEY_EVENT, parser.nextInt(0));
 
-        position.setLatitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
 
         position.setTime(parser.nextDateTime());
 
         position.setValid(parser.next().equals("A"));
 
-        position.set(Position.KEY_RSSI, parser.nextInt());
+        position.set(Position.KEY_RSSI, parser.nextInt(0));
 
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
 
-        position.set(Position.KEY_ODOMETER, parser.nextInt());
+        position.set(Position.KEY_ODOMETER, parser.nextInt(0));
 
         if (parser.hasNext(9)) {
 
@@ -164,21 +164,22 @@ public class AquilaProtocolDecoder extends BaseProtocolDecoder {
             position.set(Position.KEY_CHARGE, parser.next());
             position.set(Position.PREFIX_IN + 2, parser.next());
 
-            position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
+            position.set(Position.KEY_IGNITION, parser.nextInt(0) == 1);
 
-            int course = (parser.nextInt() << 3) + (parser.nextInt() << 2) + (parser.nextInt() << 1) + parser.nextInt();
+            int course = (parser.nextInt(0) << 3) + (parser.nextInt(0) << 2)
+                    + (parser.nextInt(0) << 1) + parser.nextInt(0);
             if (course > 0 && course <= 8) {
                 position.setCourse((course - 1) * 45);
             }
 
         } else if (parser.hasNext(7)) {
 
-            position.setCourse(parser.nextInt());
+            position.setCourse(parser.nextInt(0));
 
             position.set(Position.KEY_CHARGE, parser.next());
-            position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
-            position.set(Position.KEY_POWER, parser.nextInt());
-            position.set(Position.KEY_BATTERY, parser.nextInt());
+            position.set(Position.KEY_IGNITION, parser.nextInt(0) == 1);
+            position.set(Position.KEY_POWER, parser.nextInt(0));
+            position.set(Position.KEY_BATTERY, parser.nextInt(0));
 
             String obd = parser.next();
             position.set("obd", obd.substring(1, obd.length() - 1));
@@ -188,17 +189,17 @@ public class AquilaProtocolDecoder extends BaseProtocolDecoder {
 
         } else {
 
-            position.setCourse(parser.nextInt());
+            position.setCourse(parser.nextInt(0));
 
-            position.set(Position.KEY_SATELLITES, parser.nextInt());
-            position.set(Position.KEY_HDOP, parser.nextDouble());
-            position.set(Position.PREFIX_ADC + 1, parser.nextInt());
-            position.set(Position.PREFIX_IN + 1, parser.nextInt());
+            position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+            position.set(Position.KEY_HDOP, parser.nextDouble(0));
+            position.set(Position.PREFIX_ADC + 1, parser.nextInt(0));
+            position.set(Position.PREFIX_IN + 1, parser.nextInt(0));
             position.set(Position.KEY_CHARGE, parser.next());
-            position.set(Position.PREFIX_IN + 2, parser.nextInt());
-            position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
-            position.set(Position.KEY_POWER, parser.nextInt());
-            position.set(Position.KEY_BATTERY, parser.nextInt());
+            position.set(Position.PREFIX_IN + 2, parser.nextInt(0));
+            position.set(Position.KEY_IGNITION, parser.nextInt(0) == 1);
+            position.set(Position.KEY_POWER, parser.nextInt(0));
+            position.set(Position.KEY_BATTERY, parser.nextInt(0));
 
         }
 
diff --git a/src/org/traccar/protocol/Ardi01ProtocolDecoder.java b/src/org/traccar/protocol/Ardi01ProtocolDecoder.java
index 47d79ccd8..c0d1a78fd 100644
--- a/src/org/traccar/protocol/Ardi01ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Ardi01ProtocolDecoder.java
@@ -67,13 +67,13 @@ public class Ardi01ProtocolDecoder extends BaseProtocolDecoder {
 
         position.setTime(parser.nextDateTime());
 
-        position.setLongitude(parser.nextDouble());
-        position.setLatitude(parser.nextDouble());
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
-        position.setCourse(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
+        position.setLongitude(parser.nextDouble(0));
+        position.setLatitude(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
 
-        int satellites = parser.nextInt();
+        int satellites = parser.nextInt(0);
         position.setValid(satellites >= 3);
         position.set(Position.KEY_SATELLITES, satellites);
 
diff --git a/src/org/traccar/protocol/ArknavProtocolDecoder.java b/src/org/traccar/protocol/ArknavProtocolDecoder.java
index 2b343e7c3..927c50c29 100644
--- a/src/org/traccar/protocol/ArknavProtocolDecoder.java
+++ b/src/org/traccar/protocol/ArknavProtocolDecoder.java
@@ -70,10 +70,10 @@ public class ArknavProtocolDecoder extends BaseProtocolDecoder {
         position.setValid(parser.next().equals("A"));
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        position.set(Position.KEY_HDOP, parser.nextDouble());
+        position.set(Position.KEY_HDOP, parser.nextDouble(0));
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY));
 
diff --git a/src/org/traccar/protocol/ArknavX8ProtocolDecoder.java b/src/org/traccar/protocol/ArknavX8ProtocolDecoder.java
index 5f15323e6..8a80901b5 100644
--- a/src/org/traccar/protocol/ArknavX8ProtocolDecoder.java
+++ b/src/org/traccar/protocol/ArknavX8ProtocolDecoder.java
@@ -76,10 +76,10 @@ public class ArknavX8ProtocolDecoder extends BaseProtocolDecoder {
         position.setValid(parser.next().equals("A"));
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        position.set(Position.KEY_HDOP, parser.nextDouble());
+        position.set(Position.KEY_HDOP, parser.nextDouble(0));
         position.set(Position.KEY_STATUS, parser.next());
 
         return position;
diff --git a/src/org/traccar/protocol/ArnaviProtocolDecoder.java b/src/org/traccar/protocol/ArnaviProtocolDecoder.java
index 56f58f2b5..9c4ab5d05 100644
--- a/src/org/traccar/protocol/ArnaviProtocolDecoder.java
+++ b/src/org/traccar/protocol/ArnaviProtocolDecoder.java
@@ -74,23 +74,23 @@ public class ArnaviProtocolDecoder extends BaseProtocolDecoder {
         }
         position.setDeviceId(deviceSession.getDeviceId());
 
-        position.set(Position.KEY_INDEX, parser.nextInt());
-        position.set(Position.KEY_POWER, parser.nextInt() * 0.01);
-        position.set(Position.KEY_BATTERY, parser.nextInt() * 0.01);
-        position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
-        position.set(Position.KEY_INPUT, parser.nextInt());
-        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_INDEX, parser.nextInt(0));
+        position.set(Position.KEY_POWER, parser.nextInt(0) * 0.01);
+        position.set(Position.KEY_BATTERY, parser.nextInt(0) * 0.01);
+        position.set(Position.KEY_IGNITION, parser.nextInt(0) == 1);
+        position.set(Position.KEY_INPUT, parser.nextInt(0));
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
 
         position.setValid(true);
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
         return position;
diff --git a/src/org/traccar/protocol/AuroProtocolDecoder.java b/src/org/traccar/protocol/AuroProtocolDecoder.java
index 72dea3b61..a45d14709 100644
--- a/src/org/traccar/protocol/AuroProtocolDecoder.java
+++ b/src/org/traccar/protocol/AuroProtocolDecoder.java
@@ -65,7 +65,7 @@ public class AuroProtocolDecoder extends BaseProtocolDecoder {
         Position position = new Position();
         position.setProtocol(getProtocolName());
 
-        position.set(Position.KEY_INDEX, parser.nextInt());
+        position.set(Position.KEY_INDEX, parser.nextInt(0));
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
@@ -79,11 +79,11 @@ public class AuroProtocolDecoder extends BaseProtocolDecoder {
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
 
-        position.setCourse(parser.nextDouble());
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+        position.setCourse(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
 
-        position.set(Position.KEY_BATTERY, parser.nextInt());
-        position.set(Position.KEY_CHARGE, parser.nextInt() == 1);
+        position.set(Position.KEY_BATTERY, parser.nextInt(0));
+        position.set(Position.KEY_CHARGE, parser.nextInt(0) == 1);
 
         return position;
     }
diff --git a/src/org/traccar/protocol/AutoGradeProtocolDecoder.java b/src/org/traccar/protocol/AutoGradeProtocolDecoder.java
index 4f691171c..753509f31 100644
--- a/src/org/traccar/protocol/AutoGradeProtocolDecoder.java
+++ b/src/org/traccar/protocol/AutoGradeProtocolDecoder.java
@@ -77,17 +77,17 @@ public class AutoGradeProtocolDecoder extends BaseProtocolDecoder {
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .setDateReverse(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());
+        position.setSpeed(parser.nextDouble(0));
 
-        dateBuilder.setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
-        position.setCourse(parser.nextDouble());
+        position.setCourse(parser.nextDouble(0));
 
         int status = parser.next().charAt(0);
         position.set(Position.KEY_STATUS, status);
diff --git a/src/org/traccar/protocol/BoxProtocolDecoder.java b/src/org/traccar/protocol/BoxProtocolDecoder.java
index 82c1c9c24..562731657 100644
--- a/src/org/traccar/protocol/BoxProtocolDecoder.java
+++ b/src/org/traccar/protocol/BoxProtocolDecoder.java
@@ -83,15 +83,15 @@ public class BoxProtocolDecoder extends BaseProtocolDecoder {
 
             position.setTime(parser.nextDateTime());
 
-            position.setLatitude(parser.nextDouble());
-            position.setLongitude(parser.nextDouble());
-            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
-            position.setCourse(parser.nextDouble());
+            position.setLatitude(parser.nextDouble(0));
+            position.setLongitude(parser.nextDouble(0));
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+            position.setCourse(parser.nextDouble(0));
 
-            position.set(Position.KEY_ODOMETER_TRIP, parser.nextDouble() * 1000);
+            position.set(Position.KEY_ODOMETER_TRIP, parser.nextDouble(0) * 1000);
             position.set(Position.KEY_EVENT, parser.next());
 
-            int status = parser.nextInt();
+            int status = parser.nextInt(0);
             position.setValid((status & 0x04) == 0);
             position.set(Position.KEY_STATUS, status);
 
diff --git a/src/org/traccar/protocol/CarTrackProtocolDecoder.java b/src/org/traccar/protocol/CarTrackProtocolDecoder.java
index 40af1c812..3064bbb35 100644
--- a/src/org/traccar/protocol/CarTrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/CarTrackProtocolDecoder.java
@@ -77,15 +77,15 @@ public class CarTrackProtocolDecoder extends BaseProtocolDecoder {
         position.set(Position.KEY_COMMAND, parser.next());
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .setTime(parser.nextInt(0), 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());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
         position.set(Position.PREFIX_IO + 1, parser.next());
diff --git a/src/org/traccar/protocol/CarcellProtocolDecoder.java b/src/org/traccar/protocol/CarcellProtocolDecoder.java
index 40e40a40f..fedc65168 100644
--- a/src/org/traccar/protocol/CarcellProtocolDecoder.java
+++ b/src/org/traccar/protocol/CarcellProtocolDecoder.java
@@ -107,24 +107,24 @@ public class CarcellProtocolDecoder extends BaseProtocolDecoder {
             position.setLongitude(parser.nextCoordinate(CoordinateFormat.HEM_DEG));
         }
 
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
-        position.setCourse(parser.nextInt());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt(0)));
+        position.setCourse(parser.nextInt(0));
 
         if (parser.hasNext(3)) {
-            position.set("x", parser.nextInt());
-            position.set("y", parser.nextInt());
-            position.set("z", parser.nextInt());
+            position.set("x", parser.nextInt(0));
+            position.set("y", parser.nextInt(0));
+            position.set("z", parser.nextInt(0));
         }
 
         if (parser.hasNext(1)) {
-            position.set(Position.KEY_ACCELERATION, parser.nextInt());
+            position.set(Position.KEY_ACCELERATION, parser.nextInt(0));
         }
 
-        Double internalBattery = (parser.nextDouble() + 100d) * 0.0294d;
+        Double internalBattery = (parser.nextDouble(0) + 100d) * 0.0294d;
         position.set(Position.KEY_BATTERY, internalBattery);
-        position.set(Position.KEY_RSSI, parser.nextInt());
+        position.set(Position.KEY_RSSI, parser.nextInt(0));
         position.set("jamming", parser.next().equals("1"));
-        position.set(Position.KEY_GPS, parser.nextInt());
+        position.set(Position.KEY_GPS, parser.nextInt(0));
 
         position.set("clockType", parser.next());
 
@@ -144,16 +144,16 @@ public class CarcellProtocolDecoder extends BaseProtocolDecoder {
             }
             position.set("painel", painelStatus.equals("2"));
 
-            Double mainVoltage = parser.nextDouble() / 100d;
+            Double mainVoltage = parser.nextDouble(0) / 100d;
             position.set(Position.KEY_POWER, mainVoltage);
         }
 
         if (parser.hasNext(5)) {
-            position.set("timeUntilDelivery", parser.nextInt());
+            position.set("timeUntilDelivery", parser.nextInt(0));
             parser.next(); // panic button status
             position.set(Position.KEY_INPUT, parser.next());
 
-            Double mainVoltage = parser.nextDouble() / 100d;
+            Double mainVoltage = parser.nextDouble(0) / 100d;
             position.set(Position.KEY_POWER, mainVoltage);
 
             position.set("iccid", parser.next());
diff --git a/src/org/traccar/protocol/CarscopProtocolDecoder.java b/src/org/traccar/protocol/CarscopProtocolDecoder.java
index 144b29f49..ac3df1cd7 100644
--- a/src/org/traccar/protocol/CarscopProtocolDecoder.java
+++ b/src/org/traccar/protocol/CarscopProtocolDecoder.java
@@ -76,20 +76,20 @@ public class CarscopProtocolDecoder extends BaseProtocolDecoder {
         position.setProtocol(getProtocolName());
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .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());
+        position.setSpeed(parser.nextDouble(0));
 
-        dateBuilder.setDate(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDate(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
-        position.setCourse(parser.nextDouble());
+        position.setCourse(parser.nextDouble(0));
 
         position.set(Position.KEY_STATUS, parser.next());
-        position.set(Position.KEY_ODOMETER, parser.nextInt());
+        position.set(Position.KEY_ODOMETER, parser.nextInt(0));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/CguardProtocolDecoder.java b/src/org/traccar/protocol/CguardProtocolDecoder.java
index f1d593944..e1274d9d8 100644
--- a/src/org/traccar/protocol/CguardProtocolDecoder.java
+++ b/src/org/traccar/protocol/CguardProtocolDecoder.java
@@ -65,14 +65,14 @@ public class CguardProtocolDecoder extends BaseProtocolDecoder {
         position.setTime(parser.nextDateTime());
 
         position.setValid(true);
-        position.setLatitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
 
-        position.setAccuracy(parser.nextDouble());
+        position.setAccuracy(parser.nextDouble(0));
 
-        position.setCourse(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/CityeasyProtocolDecoder.java b/src/org/traccar/protocol/CityeasyProtocolDecoder.java
index a9fee9fe7..6f2764e84 100644
--- a/src/org/traccar/protocol/CityeasyProtocolDecoder.java
+++ b/src/org/traccar/protocol/CityeasyProtocolDecoder.java
@@ -105,9 +105,9 @@ public class CityeasyProtocolDecoder extends BaseProtocolDecoder {
                 position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
                 position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
 
-                position.setSpeed(parser.nextDouble());
-                position.set(Position.KEY_HDOP, parser.nextDouble());
-                position.setAltitude(parser.nextDouble());
+                position.setSpeed(parser.nextDouble(0));
+                position.set(Position.KEY_HDOP, parser.nextDouble(0));
+                position.setAltitude(parser.nextDouble(0));
 
             } else {
 
@@ -116,7 +116,7 @@ public class CityeasyProtocolDecoder extends BaseProtocolDecoder {
             }
 
             position.setNetwork(new Network(CellTower.from(
-                    parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextInt())));
+                    parser.nextInt(0), parser.nextInt(0), parser.nextInt(0), parser.nextInt(0))));
 
             return position;
         }
diff --git a/src/org/traccar/protocol/CradlepointProtocolDecoder.java b/src/org/traccar/protocol/CradlepointProtocolDecoder.java
index 0656b831f..a4ad118aa 100644
--- a/src/org/traccar/protocol/CradlepointProtocolDecoder.java
+++ b/src/org/traccar/protocol/CradlepointProtocolDecoder.java
@@ -72,8 +72,8 @@ public class CradlepointProtocolDecoder extends BaseProtocolDecoder {
         position.setValid(true);
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
         parser.skip(4);
 
diff --git a/src/org/traccar/protocol/DishaProtocolDecoder.java b/src/org/traccar/protocol/DishaProtocolDecoder.java
index 26ca1a856..2b25f01fa 100644
--- a/src/org/traccar/protocol/DishaProtocolDecoder.java
+++ b/src/org/traccar/protocol/DishaProtocolDecoder.java
@@ -81,19 +81,19 @@ public class DishaProtocolDecoder extends BaseProtocolDecoder {
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
 
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
         position.set(Position.KEY_SATELLITES, parser.next());
         position.set(Position.KEY_HDOP, parser.next());
         position.set(Position.KEY_RSSI, parser.next());
-        position.set(Position.KEY_CHARGE, parser.nextInt() == 2);
+        position.set(Position.KEY_CHARGE, parser.nextInt(0) == 2);
         position.set(Position.KEY_BATTERY, parser.next());
 
-        position.set(Position.PREFIX_ADC + 1, parser.nextInt());
-        position.set(Position.PREFIX_ADC + 2, parser.nextInt());
+        position.set(Position.PREFIX_ADC + 1, parser.nextInt(0));
+        position.set(Position.PREFIX_ADC + 2, parser.nextInt(0));
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
         position.set(Position.KEY_INPUT, parser.next());
 
         return position;
diff --git a/src/org/traccar/protocol/EasyTrackProtocolDecoder.java b/src/org/traccar/protocol/EasyTrackProtocolDecoder.java
index 7c91b843c..f44c91c4a 100644
--- a/src/org/traccar/protocol/EasyTrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/EasyTrackProtocolDecoder.java
@@ -19,6 +19,7 @@ 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.Parser;
 import org.traccar.helper.PatternBuilder;
 import org.traccar.model.Position;
@@ -74,30 +75,33 @@ public class EasyTrackProtocolDecoder extends BaseProtocolDecoder {
 
         position.setValid(parser.next().equals("A"));
 
-        position.setTime(parser.nextDateTime(16));
+        DateBuilder dateBuilder = new DateBuilder()
+                .setDate(parser.nextHexInt(0), parser.nextHexInt(0), parser.nextHexInt(0))
+                .setTime(parser.nextHexInt(0), parser.nextHexInt(0), parser.nextHexInt(0));
+        position.setTime(dateBuilder.getDate());
 
-        if (BitUtil.check(parser.nextInt(16), 3)) {
-            position.setLatitude(-parser.nextInt(16) / 600000.0);
+        if (BitUtil.check(parser.nextHexInt(0), 3)) {
+            position.setLatitude(-parser.nextHexInt(0) / 600000.0);
         } else {
-            position.setLatitude(parser.nextInt(16) / 600000.0);
+            position.setLatitude(parser.nextHexInt(0) / 600000.0);
         }
 
-        if (BitUtil.check(parser.nextInt(16), 3)) {
-            position.setLongitude(-parser.nextInt(16) / 600000.0);
+        if (BitUtil.check(parser.nextHexInt(0), 3)) {
+            position.setLongitude(-parser.nextHexInt(0) / 600000.0);
         } else {
-            position.setLongitude(parser.nextInt(16) / 600000.0);
+            position.setLongitude(parser.nextHexInt(0) / 600000.0);
         }
 
-        position.setSpeed(parser.nextInt(16) / 100.0);
-        position.setCourse(parser.nextInt(16) / 100.0);
+        position.setSpeed(parser.nextHexInt(0) / 100.0);
+        position.setCourse(parser.nextHexInt(0) / 100.0);
 
         position.set(Position.KEY_STATUS, parser.next());
         position.set("signal", parser.next());
-        position.set(Position.KEY_POWER, parser.nextDouble());
-        position.set("oil", parser.nextInt(16));
-        position.set(Position.KEY_ODOMETER, parser.nextInt(16) * 100);
+        position.set(Position.KEY_POWER, parser.nextDouble(0));
+        position.set("oil", parser.nextHexInt(0));
+        position.set(Position.KEY_ODOMETER, parser.nextHexInt(0) * 100);
 
-        position.setAltitude(parser.nextDouble());
+        position.setAltitude(parser.nextDouble(0));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/EnforaProtocolDecoder.java b/src/org/traccar/protocol/EnforaProtocolDecoder.java
index f9045a6f6..f0b79aa1f 100644
--- a/src/org/traccar/protocol/EnforaProtocolDecoder.java
+++ b/src/org/traccar/protocol/EnforaProtocolDecoder.java
@@ -100,15 +100,15 @@ public class EnforaProtocolDecoder extends BaseProtocolDecoder {
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .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());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
         return position;
diff --git a/src/org/traccar/protocol/ExtremTracProtocolDecoder.java b/src/org/traccar/protocol/ExtremTracProtocolDecoder.java
index deb1ed24b..79e3306df 100644
--- a/src/org/traccar/protocol/ExtremTracProtocolDecoder.java
+++ b/src/org/traccar/protocol/ExtremTracProtocolDecoder.java
@@ -66,15 +66,15 @@ public class ExtremTracProtocolDecoder extends BaseProtocolDecoder {
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .setTime(parser.nextInt(0), 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());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
         return position;
diff --git a/src/org/traccar/protocol/FifotrackProtocolDecoder.java b/src/org/traccar/protocol/FifotrackProtocolDecoder.java
index bec212f30..f8f4fb078 100644
--- a/src/org/traccar/protocol/FifotrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/FifotrackProtocolDecoder.java
@@ -87,23 +87,23 @@ public class FifotrackProtocolDecoder extends BaseProtocolDecoder {
         position.setTime(parser.nextDateTime());
 
         position.setValid(parser.next().equals("A"));
-        position.setLatitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
-        position.setCourse(parser.nextInt());
-        position.setAltitude(parser.nextInt());
-
-        position.set(Position.KEY_ODOMETER, parser.nextLong());
-        position.set(Position.KEY_STATUS, parser.nextInt(16));
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt(0)));
+        position.setCourse(parser.nextInt(0));
+        position.setAltitude(parser.nextInt(0));
+
+        position.set(Position.KEY_ODOMETER, parser.nextLong(0));
+        position.set(Position.KEY_STATUS, parser.nextHexInt(0));
         if (parser.hasNext()) {
-            position.set(Position.KEY_INPUT, parser.nextInt(16));
+            position.set(Position.KEY_INPUT, parser.nextHexInt(0));
         }
         if (parser.hasNext()) {
-            position.set(Position.KEY_OUTPUT, parser.nextInt(16));
+            position.set(Position.KEY_OUTPUT, parser.nextHexInt(0));
         }
 
         position.setNetwork(new Network(CellTower.from(
-                parser.nextInt(), parser.nextInt(), parser.nextInt(16), parser.nextInt(16))));
+                parser.nextInt(0), parser.nextInt(0), parser.nextHexInt(0), parser.nextHexInt(0))));
 
         String[] adc = parser.next().split("\\|");
         for (int i = 0; i < adc.length; i++) {
diff --git a/src/org/traccar/protocol/FlextrackProtocolDecoder.java b/src/org/traccar/protocol/FlextrackProtocolDecoder.java
index 2d7414f82..ab2e4d24c 100644
--- a/src/org/traccar/protocol/FlextrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/FlextrackProtocolDecoder.java
@@ -114,24 +114,25 @@ public class FlextrackProtocolDecoder extends BaseProtocolDecoder {
             position.setValid(true);
             position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
             position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
-            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
-            position.setCourse(parser.nextInt());
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt(0)));
+            position.setCourse(parser.nextInt(0));
 
-            position.set(Position.KEY_SATELLITES, parser.nextInt());
-            position.set(Position.KEY_BATTERY, parser.nextInt());
-            int rssi = parser.nextInt();
-            position.set(Position.KEY_STATUS, parser.nextInt(16));
+            position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+            position.set(Position.KEY_BATTERY, parser.nextInt(0));
+            int rssi = parser.nextInt(0);
+            position.set(Position.KEY_STATUS, parser.nextHexInt(0));
 
-            int mcc = parser.nextInt();
-            int mnc = parser.nextInt();
+            int mcc = parser.nextInt(0);
+            int mnc = parser.nextInt(0);
 
-            position.setAltitude(parser.nextInt());
+            position.setAltitude(parser.nextInt(0));
 
-            position.set(Position.KEY_HDOP, parser.nextInt() * 0.1);
+            position.set(Position.KEY_HDOP, parser.nextInt(0) * 0.1);
 
-            position.setNetwork(new Network(CellTower.from(mcc, mnc, parser.nextInt(16), parser.nextInt(16), rssi)));
+            position.setNetwork(new Network(CellTower.from(
+                    mcc, mnc, parser.nextHexInt(0), parser.nextHexInt(0), rssi)));
 
-            position.set(Position.KEY_ODOMETER, parser.nextInt());
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0));
 
             return position;
         }
diff --git a/src/org/traccar/protocol/FoxProtocolDecoder.java b/src/org/traccar/protocol/FoxProtocolDecoder.java
index 83bebd7c0..9b2cf0e1d 100644
--- a/src/org/traccar/protocol/FoxProtocolDecoder.java
+++ b/src/org/traccar/protocol/FoxProtocolDecoder.java
@@ -92,25 +92,25 @@ public class FoxProtocolDecoder extends BaseProtocolDecoder {
             position.setProtocol(getProtocolName());
             position.setDeviceId(deviceSession.getDeviceId());
 
-            position.set(Position.KEY_STATUS, parser.nextInt());
+            position.set(Position.KEY_STATUS, parser.nextInt(0));
 
             position.setValid(parser.next().equals("A"));
 
             position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
             position.setLatitude(parser.nextCoordinate());
             position.setLongitude(parser.nextCoordinate());
-            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
-            position.setCourse(parser.nextDouble());
-
-            position.set(Position.KEY_INPUT, parser.nextInt(2));
-            position.set(Position.KEY_POWER, parser.nextDouble() * 0.1);
-            position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
-            position.set(Position.KEY_RPM, parser.nextInt());
-            position.set(Position.KEY_FUEL_LEVEL, parser.nextInt());
-            position.set(Position.PREFIX_ADC + 1, parser.nextInt());
-            position.set(Position.PREFIX_ADC + 2, parser.nextInt());
-            position.set(Position.KEY_OUTPUT, parser.nextInt(2));
-            position.set(Position.KEY_ODOMETER, parser.nextInt());
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+            position.setCourse(parser.nextDouble(0));
+
+            position.set(Position.KEY_INPUT, parser.nextBinInt(0));
+            position.set(Position.KEY_POWER, parser.nextDouble(0) * 0.1);
+            position.set(Position.PREFIX_TEMP + 1, parser.nextInt(0));
+            position.set(Position.KEY_RPM, parser.nextInt(0));
+            position.set(Position.KEY_FUEL_LEVEL, parser.nextInt(0));
+            position.set(Position.PREFIX_ADC + 1, parser.nextInt(0));
+            position.set(Position.PREFIX_ADC + 2, parser.nextInt(0));
+            position.set(Position.KEY_OUTPUT, parser.nextBinInt(0));
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0));
 
             position.set("statusData", parser.next());
 
diff --git a/src/org/traccar/protocol/FreedomProtocolDecoder.java b/src/org/traccar/protocol/FreedomProtocolDecoder.java
index 50546782c..56b6b9e19 100644
--- a/src/org/traccar/protocol/FreedomProtocolDecoder.java
+++ b/src/org/traccar/protocol/FreedomProtocolDecoder.java
@@ -69,7 +69,7 @@ public class FreedomProtocolDecoder extends BaseProtocolDecoder {
         position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
         position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
 
-        position.setSpeed(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/Gl100ProtocolDecoder.java b/src/org/traccar/protocol/Gl100ProtocolDecoder.java
index 0b3c72a91..945edfff0 100644
--- a/src/org/traccar/protocol/Gl100ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gl100ProtocolDecoder.java
@@ -81,12 +81,12 @@ public class Gl100ProtocolDecoder extends BaseProtocolDecoder {
         }
         position.setDeviceId(deviceSession.getDeviceId());
 
-        position.setValid(parser.nextInt() == 0);
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
-        position.setLatitude(parser.nextDouble());
+        position.setValid(parser.nextInt(0) == 0);
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setLatitude(parser.nextDouble(0));
 
         position.setTime(parser.nextDateTime());
 
diff --git a/src/org/traccar/protocol/Gl200ProtocolDecoder.java b/src/org/traccar/protocol/Gl200ProtocolDecoder.java
index f8ad60d4d..eb1099adc 100644
--- a/src/org/traccar/protocol/Gl200ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gl200ProtocolDecoder.java
@@ -396,8 +396,8 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
 
         parser.next(); // odometer or external power
 
-        position.set(Position.KEY_BATTERY, parser.nextDouble());
-        position.set(Position.KEY_CHARGE, parser.nextInt() == 1);
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0));
+        position.set(Position.KEY_CHARGE, parser.nextInt(0) == 1);
 
         if (parser.hasNext()) {
             position.set(Position.KEY_BATTERY, parser.next() + "%");
@@ -413,7 +413,7 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
 
         getLastLocation(position, parser.nextDateTime());
 
-        position.set(Position.KEY_INDEX, parser.nextInt(16));
+        position.set(Position.KEY_INDEX, parser.nextHexInt(0));
 
         return position;
     }
@@ -426,8 +426,8 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
         }
 
         position.set("deviceType", parser.next());
-        position.set(Position.KEY_VERSION_FW, parser.nextInt(16));
-        position.set(Position.KEY_VERSION_HW, parser.nextInt(16));
+        position.set(Position.KEY_VERSION_FW, parser.nextHexInt(0));
+        position.set(Position.KEY_VERSION_HW, parser.nextHexInt(0));
 
         getLastLocation(position, parser.nextDateTime());
 
@@ -435,35 +435,35 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
     }
 
     private void decodeLocation(Position position, Parser parser) {
-        int hdop = parser.nextInt();
+        int hdop = parser.nextInt(0);
         position.setValid(hdop > 0);
         position.set(Position.KEY_HDOP, hdop);
 
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
-        position.setCourse(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
 
         if (parser.hasNext(8)) {
             position.setValid(true);
-            position.setLongitude(parser.nextDouble());
-            position.setLatitude(parser.nextDouble());
+            position.setLongitude(parser.nextDouble(0));
+            position.setLatitude(parser.nextDouble(0));
             position.setTime(parser.nextDateTime());
         } else {
             getLastLocation(position, null);
         }
 
         if (parser.hasNext(6)) {
-            int mcc = parser.nextInt();
-            int mnc = parser.nextInt();
+            int mcc = parser.nextInt(0);
+            int mnc = parser.nextInt(0);
             if (parser.hasNext(2)) {
-                position.setNetwork(new Network(CellTower.from(mcc, mnc, parser.nextInt(), parser.nextInt())));
+                position.setNetwork(new Network(CellTower.from(mcc, mnc, parser.nextInt(0), parser.nextInt(0))));
             }
             if (parser.hasNext(2)) {
-                position.setNetwork(new Network(CellTower.from(mcc, mnc, parser.nextInt(16), parser.nextInt(16))));
+                position.setNetwork(new Network(CellTower.from(mcc, mnc, parser.nextHexInt(0), parser.nextHexInt(0))));
             }
         }
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
     }
 
     private Object decodeObd(Channel channel, SocketAddress remoteAddress, String sentence) {
@@ -473,21 +473,21 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        position.set(Position.KEY_RPM, parser.nextInt());
-        position.set(Position.KEY_OBD_SPEED, parser.nextInt());
-        position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
+        position.set(Position.KEY_RPM, parser.nextInt(0));
+        position.set(Position.KEY_OBD_SPEED, parser.nextInt(0));
+        position.set(Position.PREFIX_TEMP + 1, parser.nextInt(0));
         position.set(Position.KEY_FUEL_CONSUMPTION, parser.next());
-        position.set("dtcsClearedDistance", parser.nextInt());
-        position.set("odbConnect", parser.nextInt() == 1);
-        position.set("dtcsNumber", parser.nextInt());
+        position.set("dtcsClearedDistance", parser.nextInt(0));
+        position.set("odbConnect", parser.nextInt(0) == 1);
+        position.set("dtcsNumber", parser.nextInt(0));
         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() * 1000);
+        position.set(Position.KEY_THROTTLE, parser.nextInt(0));
+        position.set(Position.KEY_FUEL_LEVEL, parser.nextInt(0));
+        position.set(Position.KEY_OBD_ODOMETER, parser.nextInt(0) * 1000);
 
         decodeLocation(position, parser);
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
 
         decodeDeviceTime(position, parser);
 
@@ -496,14 +496,14 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
 
     private void decodeStatus(Position position, Parser parser) {
         if (parser.hasNext(3)) {
-            int ignition = parser.nextInt(16);
+            int ignition = parser.nextHexInt(0);
             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.nextInt(16));
-            position.set(Position.KEY_OUTPUT, parser.nextInt(16));
+            position.set(Position.KEY_INPUT, parser.nextHexInt(0));
+            position.set(Position.KEY_OUTPUT, parser.nextHexInt(0));
         }
     }
 
@@ -521,7 +521,7 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
         LinkedList<Position> positions = new LinkedList<>();
 
         String vin = parser.next();
-        int power = parser.nextInt();
+        int power = parser.nextInt(0);
 
         Parser itemParser = new Parser(PATTERN_LOCATION, parser.next());
         while (itemParser.find()) {
@@ -545,10 +545,10 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
             position.set(Position.KEY_POWER, power);
         }
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
         position.set(Position.KEY_BATTERY, parser.next());
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
         position.set(Position.KEY_HOURS, parser.next());
         position.set(Position.PREFIX_ADC + 1, parser.next());
         position.set(Position.PREFIX_ADC + 2, parser.next());
@@ -556,8 +556,8 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
 
         decodeStatus(position, parser);
 
-        position.set(Position.KEY_RPM, parser.nextInt());
-        position.set(Position.KEY_FUEL_LEVEL, parser.nextInt());
+        position.set(Position.KEY_RPM, parser.nextInt(0));
+        position.set(Position.KEY_FUEL_LEVEL, parser.nextInt(0));
 
         decodeDeviceTime(position, parser);
 
@@ -577,7 +577,7 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
 
         LinkedList<Position> positions = new LinkedList<>();
 
-        int power = parser.nextInt();
+        int power = parser.nextInt(0);
 
         Parser itemParser = new Parser(PATTERN_LOCATION, parser.next());
         while (itemParser.find()) {
@@ -595,7 +595,7 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
         decodeLocation(position, parser);
 
         position.set(Position.KEY_POWER, power);
-        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
         position.set(Position.KEY_HOURS, parser.next());
         position.set(Position.PREFIX_ADC + 1, parser.next());
         position.set(Position.PREFIX_ADC + 2, parser.next());
@@ -618,7 +618,7 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
         decodeLocation(position, parser);
 
         position.set(Position.KEY_HOURS, parser.next());
-        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
 
         decodeDeviceTime(position, parser);
 
@@ -636,7 +636,7 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
 
         decodeLocation(position, parser);
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
 
         decodeDeviceTime(position, parser);
 
@@ -654,7 +654,7 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
 
         Network network = new Network();
 
-        parser.nextInt(); // count
+        parser.nextInt(0); // count
         Matcher matcher = Pattern.compile("([0-9a-fA-F]{12}),(-?\\d+),,,,").matcher(parser.next());
         while (matcher.find()) {
             String mac = matcher.group(1).replaceAll("(..)", "$1:");
@@ -664,7 +664,7 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
 
         position.setNetwork(network);
 
-        position.set(Position.KEY_BATTERY, parser.nextInt());
+        position.set(Position.KEY_BATTERY, parser.nextInt(0));
 
         return position;
     }
@@ -702,7 +702,7 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        int reportType = parser.nextInt();
+        int reportType = parser.nextInt(0);
         if (type.equals("NMR")) {
             position.set(Position.KEY_MOTION, reportType);
         } else if (type.equals("SOS")) {
@@ -711,10 +711,10 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
 
         decodeLocation(position, parser);
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
         position.set(Position.KEY_BATTERY, parser.next());
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
 
         decodeDeviceTime(position, parser);
 
@@ -732,17 +732,17 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        int hdop = parser.nextInt();
+        int hdop = parser.nextInt(0);
         position.setValid(hdop > 0);
         position.set(Position.KEY_HDOP, hdop);
 
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
-        position.setCourse(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
 
         if (parser.hasNext(2)) {
-            position.setLongitude(parser.nextDouble());
-            position.setLatitude(parser.nextDouble());
+            position.setLongitude(parser.nextDouble(0));
+            position.setLatitude(parser.nextDouble(0));
         } else {
             getLastLocation(position, null);
         }
@@ -753,7 +753,7 @@ public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
 
         if (parser.hasNext(4)) {
             position.setNetwork(new Network(CellTower.from(
-                    parser.nextInt(), parser.nextInt(), parser.nextInt(16), parser.nextInt(16))));
+                    parser.nextInt(0), parser.nextInt(0), parser.nextHexInt(0), parser.nextHexInt(0))));
         }
 
         decodeDeviceTime(position, parser);
diff --git a/src/org/traccar/protocol/GlobalSatProtocolDecoder.java b/src/org/traccar/protocol/GlobalSatProtocolDecoder.java
index 50d621271..4357c93dc 100644
--- a/src/org/traccar/protocol/GlobalSatProtocolDecoder.java
+++ b/src/org/traccar/protocol/GlobalSatProtocolDecoder.java
@@ -215,11 +215,11 @@ public class GlobalSatProtocolDecoder extends BaseProtocolDecoder {
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
         position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
         position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
-        position.setAltitude(parser.nextDouble());
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setAltitude(parser.nextDouble(0));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
         position.set(Position.KEY_HDOP, parser.next());
 
         return position;
diff --git a/src/org/traccar/protocol/GnxProtocolDecoder.java b/src/org/traccar/protocol/GnxProtocolDecoder.java
index cb29f5d23..070d394e8 100644
--- a/src/org/traccar/protocol/GnxProtocolDecoder.java
+++ b/src/org/traccar/protocol/GnxProtocolDecoder.java
@@ -89,14 +89,14 @@ public class GnxProtocolDecoder extends BaseProtocolDecoder {
         }
         position.setDeviceId(deviceSession.getDeviceId());
 
-        if (parser.nextInt() == 1) {
+        if (parser.nextInt(0) == 1) {
             position.set(Position.KEY_ARCHIVE, true);
         }
 
         position.setDeviceTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY, "GMT+5:30"));
         position.setFixTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY, "GMT+5:30"));
 
-        position.setValid(parser.nextInt() != 0);
+        position.setValid(parser.nextInt(0) != 0);
 
         position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
         position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
diff --git a/src/org/traccar/protocol/GoSafeProtocolDecoder.java b/src/org/traccar/protocol/GoSafeProtocolDecoder.java
index 51479ad52..ce3a5f0af 100644
--- a/src/org/traccar/protocol/GoSafeProtocolDecoder.java
+++ b/src/org/traccar/protocol/GoSafeProtocolDecoder.java
@@ -150,25 +150,25 @@ public class GoSafeProtocolDecoder extends BaseProtocolDecoder {
 
         position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
         position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
-        position.setCourse(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
 
-        position.set(Position.KEY_HDOP, parser.nextDouble());
-        position.set(Position.KEY_VDOP, parser.nextDouble());
+        position.set(Position.KEY_HDOP, parser.nextDouble(0));
+        position.set(Position.KEY_VDOP, parser.nextDouble(0));
 
         if (parser.hasNext(5)) {
-            position.setNetwork(new Network(CellTower.from(
-                    parser.nextInt(), parser.nextInt(), parser.nextInt(16), parser.nextInt(16), parser.nextInt())));
+            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());
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0));
         }
         position.set(Position.KEY_POWER, parser.next());
         position.set(Position.KEY_BATTERY, parser.next());
 
         if (parser.hasNext(6)) {
-            long status = parser.nextLong(16);
+            long status = parser.nextLong(16, 0);
             position.set(Position.KEY_IGNITION, BitUtil.check(status, 13));
             position.set(Position.KEY_STATUS, status);
             position.set("ioStatus", parser.next());
@@ -223,17 +223,17 @@ public class GoSafeProtocolDecoder extends BaseProtocolDecoder {
             position.setDeviceId(deviceSession.getDeviceId());
 
             DateBuilder dateBuilder = new DateBuilder()
-                    .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                    .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
 
             position.setValid(parser.next().equals("A"));
             position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
             position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
-            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
-            position.setCourse(parser.nextDouble());
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+            position.setCourse(parser.nextDouble(0));
 
             position.set(Position.KEY_HDOP, parser.next());
 
-            dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+            dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
             position.setTime(dateBuilder.getDate());
 
             return position;
diff --git a/src/org/traccar/protocol/GotopProtocolDecoder.java b/src/org/traccar/protocol/GotopProtocolDecoder.java
index aa1ab57fb..f938887e2 100644
--- a/src/org/traccar/protocol/GotopProtocolDecoder.java
+++ b/src/org/traccar/protocol/GotopProtocolDecoder.java
@@ -70,11 +70,11 @@ public class GotopProtocolDecoder extends BaseProtocolDecoder {
 
         position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
         position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
 
         position.set(Position.KEY_STATUS, parser.next());
 
-        position.setCourse(parser.nextDouble());
+        position.setCourse(parser.nextDouble(0));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/Gps103ProtocolDecoder.java b/src/org/traccar/protocol/Gps103ProtocolDecoder.java
index 890465ab9..b0113e0be 100644
--- a/src/org/traccar/protocol/Gps103ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gps103ProtocolDecoder.java
@@ -189,7 +189,7 @@ public class Gps103ProtocolDecoder extends BaseProtocolDecoder {
             getLastLocation(position, null);
 
             position.setNetwork(new Network(
-                    CellTower.fromLacCid(parser.nextInt(16), parser.nextInt(16))));
+                    CellTower.fromLacCid(parser.nextHexInt(0), parser.nextHexInt(0))));
 
             return position;
 
@@ -206,15 +206,15 @@ public class Gps103ProtocolDecoder extends BaseProtocolDecoder {
 
             getLastLocation(position, parser.nextDateTime());
 
-            position.set(Position.KEY_ODOMETER, parser.nextInt());
-            parser.nextDouble(); // instant fuel consumption
-            position.set(Position.KEY_FUEL_CONSUMPTION, parser.nextDouble());
-            position.set(Position.KEY_HOURS, parser.nextInt());
-            position.set(Position.KEY_OBD_SPEED, parser.nextInt());
-            position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
+            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(0));
+            position.set(Position.KEY_OBD_SPEED, parser.nextInt(0));
+            position.set(Position.PREFIX_TEMP + 1, parser.nextInt(0));
             position.set(Position.KEY_THROTTLE, parser.next());
-            position.set(Position.KEY_RPM, parser.nextInt());
-            position.set(Position.KEY_BATTERY, parser.nextDouble());
+            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;
@@ -250,10 +250,10 @@ public class Gps103ProtocolDecoder extends BaseProtocolDecoder {
         }
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setDate(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .setDate(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
 
-        int localHours = parser.nextInt();
-        int localMinutes = parser.nextInt();
+        int localHours = parser.nextInt(0);
+        int localMinutes = parser.nextInt(0);
 
         String rfid = parser.next();
         if (alarm.equals("rfid")) {
@@ -263,7 +263,7 @@ public class Gps103ProtocolDecoder extends BaseProtocolDecoder {
         String utcHours = parser.next();
         String utcMinutes = parser.next();
 
-        dateBuilder.setTime(localHours, localMinutes, parser.nextInt());
+        dateBuilder.setTime(localHours, localMinutes, parser.nextInt(0));
 
         // Timezone calculation
         if (utcHours != null && utcMinutes != null) {
@@ -281,9 +281,9 @@ public class Gps103ProtocolDecoder extends BaseProtocolDecoder {
         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());
-        position.setCourse(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
+        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());
diff --git a/src/org/traccar/protocol/GpsGateProtocolDecoder.java b/src/org/traccar/protocol/GpsGateProtocolDecoder.java
index 701b1874b..ca1d6453e 100644
--- a/src/org/traccar/protocol/GpsGateProtocolDecoder.java
+++ b/src/org/traccar/protocol/GpsGateProtocolDecoder.java
@@ -123,15 +123,15 @@ public class GpsGateProtocolDecoder extends BaseProtocolDecoder {
             position.setDeviceId(deviceSession.getDeviceId());
 
             DateBuilder dateBuilder = new DateBuilder()
-                    .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                    .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());
-            position.setCourse(parser.nextDouble());
+            position.setSpeed(parser.nextDouble(0));
+            position.setCourse(parser.nextDouble(0));
 
-            dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+            dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
             position.setTime(dateBuilder.getDate());
 
             return position;
@@ -154,9 +154,9 @@ public class GpsGateProtocolDecoder extends BaseProtocolDecoder {
 
             position.setLatitude(parser.nextCoordinate());
             position.setLongitude(parser.nextCoordinate());
-            position.setAltitude(parser.nextDouble());
-            position.setSpeed(parser.nextDouble());
-            position.setCourse(parser.nextDouble());
+            position.setAltitude(parser.nextDouble(0));
+            position.setSpeed(parser.nextDouble(0));
+            position.setCourse(parser.nextDouble(0));
 
             position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
 
diff --git a/src/org/traccar/protocol/GpsMarkerProtocolDecoder.java b/src/org/traccar/protocol/GpsMarkerProtocolDecoder.java
index 36f4a19c6..2af307c25 100644
--- a/src/org/traccar/protocol/GpsMarkerProtocolDecoder.java
+++ b/src/org/traccar/protocol/GpsMarkerProtocolDecoder.java
@@ -75,10 +75,10 @@ public class GpsMarkerProtocolDecoder extends BaseProtocolDecoder {
         position.setValid(true);
         position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN_MIN));
         position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN_MIN));
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        position.set(Position.KEY_SATELLITES, parser.nextInt(16));
+        position.set(Position.KEY_SATELLITES, parser.nextHexInt(0));
         position.set(Position.KEY_BATTERY, parser.next());
         position.set(Position.KEY_INPUT, parser.next());
         position.set(Position.KEY_OUTPUT, parser.next());
diff --git a/src/org/traccar/protocol/GpsmtaProtocolDecoder.java b/src/org/traccar/protocol/GpsmtaProtocolDecoder.java
index e0dd5fd51..11777bece 100644
--- a/src/org/traccar/protocol/GpsmtaProtocolDecoder.java
+++ b/src/org/traccar/protocol/GpsmtaProtocolDecoder.java
@@ -69,17 +69,17 @@ public class GpsmtaProtocolDecoder extends BaseProtocolDecoder {
         String time = parser.next();
         position.setTime(new Date(Long.parseLong(time) * 1000));
 
-        position.setLatitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
-        position.setSpeed(parser.nextInt());
-        position.setCourse(parser.nextInt());
-        position.setAccuracy(parser.nextInt());
-        position.setAltitude(parser.nextInt());
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setSpeed(parser.nextInt(0));
+        position.setCourse(parser.nextInt(0));
+        position.setAccuracy(parser.nextInt(0));
+        position.setAltitude(parser.nextInt(0));
 
-        position.set(Position.KEY_STATUS, parser.nextInt());
-        position.set(Position.KEY_BATTERY, parser.nextInt());
-        position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
-        position.set(Position.KEY_CHARGE, parser.nextInt() == 1);
+        position.set(Position.KEY_STATUS, parser.nextInt(0));
+        position.set(Position.KEY_BATTERY, parser.nextInt(0));
+        position.set(Position.PREFIX_TEMP + 1, parser.nextInt(0));
+        position.set(Position.KEY_CHARGE, parser.nextInt(0) == 1);
 
         if (channel != null) {
             channel.write(time, remoteAddress);
diff --git a/src/org/traccar/protocol/Gt06ProtocolDecoder.java b/src/org/traccar/protocol/Gt06ProtocolDecoder.java
index c697191ee..5ddca8096 100644
--- a/src/org/traccar/protocol/Gt06ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gt06ProtocolDecoder.java
@@ -232,8 +232,8 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        position.set(Position.PREFIX_TEMP + 1, parser.nextDouble());
-        position.set(Position.KEY_FUEL_LEVEL, parser.nextDouble());
+        position.set(Position.PREFIX_TEMP + 1, parser.nextDouble(0));
+        position.set(Position.KEY_FUEL_LEVEL, parser.nextDouble(0));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/Gt30ProtocolDecoder.java b/src/org/traccar/protocol/Gt30ProtocolDecoder.java
index c034300d0..ca5a23380 100644
--- a/src/org/traccar/protocol/Gt30ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gt30ProtocolDecoder.java
@@ -93,20 +93,20 @@ public class Gt30ProtocolDecoder extends BaseProtocolDecoder {
         }
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .setTime(parser.nextInt(0), 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());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
         position.set(Position.KEY_HDOP, parser.next());
 
-        position.setAltitude(parser.nextDouble());
+        position.setAltitude(parser.nextDouble(0));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/H02ProtocolDecoder.java b/src/org/traccar/protocol/H02ProtocolDecoder.java
index 465bf8395..fdef2e3c1 100644
--- a/src/org/traccar/protocol/H02ProtocolDecoder.java
+++ b/src/org/traccar/protocol/H02ProtocolDecoder.java
@@ -224,7 +224,7 @@ public class H02ProtocolDecoder extends BaseProtocolDecoder {
 
         DateBuilder dateBuilder = new DateBuilder();
         if (parser.hasNext(3)) {
-            dateBuilder.setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+            dateBuilder.setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         }
 
         if (parser.hasNext()) {
@@ -245,31 +245,31 @@ public class H02ProtocolDecoder extends BaseProtocolDecoder {
             position.setLongitude(parser.nextCoordinate());
         }
 
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
         if (parser.hasNext(3)) {
-            dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+            dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
             position.setTime(dateBuilder.getDate());
         } else {
             position.setTime(new Date());
         }
 
-        processStatus(position, parser.nextLong(16));
+        processStatus(position, parser.nextLong(16, 0));
 
         if (parser.hasNext(6)) {
-            position.set(Position.KEY_ODOMETER, parser.nextInt());
-            position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
-            position.set(Position.KEY_FUEL_LEVEL, parser.nextDouble());
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0));
+            position.set(Position.PREFIX_TEMP + 1, parser.nextInt(0));
+            position.set(Position.KEY_FUEL_LEVEL, parser.nextDouble(0));
 
-            position.setAltitude(parser.nextInt());
+            position.setAltitude(parser.nextInt(0));
 
-            position.setNetwork(new Network(CellTower.fromLacCid(parser.nextInt(16), parser.nextInt(16))));
+            position.setNetwork(new Network(CellTower.fromLacCid(parser.nextHexInt(0), parser.nextHexInt(0))));
         }
 
         if (parser.hasNext(4)) {
             for (int i = 1; i <= 4; i++) {
-                position.set(Position.PREFIX_IO + i, parser.nextInt());
+                position.set(Position.PREFIX_IO + i, parser.nextInt(0));
             }
         }
 
@@ -293,11 +293,11 @@ public class H02ProtocolDecoder extends BaseProtocolDecoder {
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
 
         Network network = new Network();
-        int mcc = parser.nextInt();
-        int mnc = parser.nextInt();
+        int mcc = parser.nextInt(0);
+        int mnc = parser.nextInt(0);
 
         String[] cells = parser.next().split(",");
         for (int i = 0; i < cells.length / 3; i++) {
@@ -307,11 +307,11 @@ public class H02ProtocolDecoder extends BaseProtocolDecoder {
 
         position.setNetwork(network);
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
 
         getLastLocation(position, dateBuilder.getDate());
 
-        processStatus(position, parser.nextLong(16));
+        processStatus(position, parser.nextLong(16, 0));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/HaicomProtocolDecoder.java b/src/org/traccar/protocol/HaicomProtocolDecoder.java
index 45a56cc10..7130405f6 100644
--- a/src/org/traccar/protocol/HaicomProtocolDecoder.java
+++ b/src/org/traccar/protocol/HaicomProtocolDecoder.java
@@ -75,33 +75,33 @@ public class HaicomProtocolDecoder extends BaseProtocolDecoder {
 
         position.setTime(parser.nextDateTime());
 
-        int flags = parser.nextInt();
+        int flags = parser.nextInt(0);
 
         position.setValid(BitUtil.check(flags, 0));
 
-        double latitude = parser.nextDouble() + parser.nextDouble() / 60000;
+        double latitude = parser.nextDouble(0) + parser.nextDouble(0) / 60000;
         if (BitUtil.check(flags, 2)) {
             position.setLatitude(latitude);
         } else {
             position.setLatitude(-latitude);
         }
 
-        double longitude = parser.nextDouble() + parser.nextDouble() / 60000;
+        double longitude = parser.nextDouble(0) + parser.nextDouble(0) / 60000;
         if (BitUtil.check(flags, 1)) {
             position.setLongitude(longitude);
         } else {
             position.setLongitude(-longitude);
         }
 
-        position.setSpeed(parser.nextDouble() / 10);
-        position.setCourse(parser.nextDouble() / 10);
+        position.setSpeed(parser.nextDouble(0) / 10);
+        position.setCourse(parser.nextDouble(0) / 10);
 
         position.set(Position.KEY_STATUS, parser.next());
         position.set(Position.KEY_RSSI, parser.next());
         position.set(Position.KEY_GPS, parser.next());
         position.set(Position.KEY_INPUT, parser.next());
         position.set(Position.KEY_OUTPUT, parser.next());
-        position.set(Position.KEY_BATTERY, parser.nextDouble() * 0.1);
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0) * 0.1);
 
         return position;
     }
diff --git a/src/org/traccar/protocol/HomtecsProtocolDecoder.java b/src/org/traccar/protocol/HomtecsProtocolDecoder.java
index 375fa27b8..508de173c 100644
--- a/src/org/traccar/protocol/HomtecsProtocolDecoder.java
+++ b/src/org/traccar/protocol/HomtecsProtocolDecoder.java
@@ -72,18 +72,18 @@ public class HomtecsProtocolDecoder extends BaseProtocolDecoder {
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.YMD_HMS));
 
-        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
 
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        position.setValid(parser.nextInt() > 0);
+        position.setValid(parser.nextInt(0) > 0);
 
-        position.set(Position.KEY_HDOP, parser.nextDouble());
+        position.set(Position.KEY_HDOP, parser.nextDouble(0));
 
-        position.setAltitude(parser.nextDouble());
+        position.setAltitude(parser.nextDouble(0));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/HunterProProtocolDecoder.java b/src/org/traccar/protocol/HunterProProtocolDecoder.java
index 6f2bb8fd8..b1e3f84a2 100644
--- a/src/org/traccar/protocol/HunterProProtocolDecoder.java
+++ b/src/org/traccar/protocol/HunterProProtocolDecoder.java
@@ -66,15 +66,15 @@ public class HunterProProtocolDecoder extends BaseProtocolDecoder {
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder();
-        dateBuilder.setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        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());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
         return position;
diff --git a/src/org/traccar/protocol/IdplProtocolDecoder.java b/src/org/traccar/protocol/IdplProtocolDecoder.java
index b5a23e1f2..e56a0f022 100644
--- a/src/org/traccar/protocol/IdplProtocolDecoder.java
+++ b/src/org/traccar/protocol/IdplProtocolDecoder.java
@@ -72,7 +72,7 @@ public class IdplProtocolDecoder extends BaseProtocolDecoder {
         Position position = new Position();
         position.setProtocol(getProtocolName());
 
-        position.set(Position.KEY_TYPE, parser.nextInt());
+        position.set(Position.KEY_TYPE, parser.nextInt(0));
 
         DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
         if (deviceSession == null) {
@@ -85,23 +85,23 @@ public class IdplProtocolDecoder extends BaseProtocolDecoder {
         position.setValid(parser.next().equals("A"));
         position.setLatitude(parser.nextCoordinate(CoordinateFormat.DEG_MIN_MIN_HEM));
         position.setLongitude(parser.nextCoordinate(CoordinateFormat.DEG_MIN_MIN_HEM));
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        position.set(Position.KEY_SATELLITES, parser.nextInt());
-        position.set(Position.KEY_RSSI, parser.nextInt());
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+        position.set(Position.KEY_RSSI, parser.nextInt(0));
         position.set("vehicleStatus", parser.next());
-        position.set(Position.KEY_POWER, parser.nextInt());
-        position.set(Position.KEY_BATTERY, parser.nextDouble());
-        if (parser.nextInt() == 1) {
+        position.set(Position.KEY_POWER, parser.nextInt(0));
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0));
+        if (parser.nextInt(0) == 1) {
             position.set(Position.KEY_ALARM, Position.ALARM_SOS);
         }
-        parser.nextInt(); // body tamper
-        position.set("acStatus", parser.nextInt());
-        position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
-        position.set(Position.KEY_OUTPUT, parser.nextInt());
-        position.set(Position.PREFIX_ADC + 1, parser.nextInt());
-        position.set(Position.PREFIX_ADC + 2, parser.nextInt());
+        parser.nextInt(0); // body tamper
+        position.set("acStatus", parser.nextInt(0));
+        position.set(Position.KEY_IGNITION, parser.nextInt(0) == 1);
+        position.set(Position.KEY_OUTPUT, parser.nextInt(0));
+        position.set(Position.PREFIX_ADC + 1, parser.nextInt(0));
+        position.set(Position.PREFIX_ADC + 2, parser.nextInt(0));
         position.set(Position.KEY_VERSION_FW, parser.next());
         position.set(Position.KEY_ARCHIVE, parser.next().equals("R"));
 
diff --git a/src/org/traccar/protocol/IntellitracProtocolDecoder.java b/src/org/traccar/protocol/IntellitracProtocolDecoder.java
index f43fa4aac..daba15a90 100644
--- a/src/org/traccar/protocol/IntellitracProtocolDecoder.java
+++ b/src/org/traccar/protocol/IntellitracProtocolDecoder.java
@@ -83,34 +83,34 @@ public class IntellitracProtocolDecoder extends BaseProtocolDecoder {
 
         position.setTime(parser.nextDateTime());
 
-        position.setLongitude(parser.nextDouble());
-        position.setLatitude(parser.nextDouble());
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
+        position.setLongitude(parser.nextDouble(0));
+        position.setLatitude(parser.nextDouble(0));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
 
-        int satellites = parser.nextInt();
+        int satellites = parser.nextInt(0);
         position.setValid(satellites >= 3);
         position.set(Position.KEY_SATELLITES, satellites);
 
-        position.set(Position.KEY_INDEX, parser.nextLong());
-        position.set(Position.KEY_INPUT, parser.nextInt());
-        position.set(Position.KEY_OUTPUT, parser.nextInt());
+        position.set(Position.KEY_INDEX, parser.nextLong(0));
+        position.set(Position.KEY_INPUT, parser.nextInt(0));
+        position.set(Position.KEY_OUTPUT, parser.nextInt(0));
 
-        position.set(Position.PREFIX_ADC + 1, parser.nextDouble());
-        position.set(Position.PREFIX_ADC + 2, parser.nextDouble());
+        position.set(Position.PREFIX_ADC + 1, parser.nextDouble(0));
+        position.set(Position.PREFIX_ADC + 2, parser.nextDouble(0));
 
         // J1939 data
-        position.set(Position.KEY_OBD_SPEED, parser.nextInt());
-        position.set(Position.KEY_RPM, parser.nextInt());
-        position.set("coolant", parser.nextInt());
-        position.set(Position.KEY_FUEL_LEVEL, parser.nextInt());
-        position.set(Position.KEY_FUEL_CONSUMPTION, parser.nextInt());
-        position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
-        position.set(Position.KEY_CHARGE, parser.nextInt());
-        position.set("tpl", parser.nextInt());
-        position.set("axle", parser.nextInt());
-        position.set(Position.KEY_OBD_ODOMETER, parser.nextInt());
+        position.set(Position.KEY_OBD_SPEED, parser.nextInt(0));
+        position.set(Position.KEY_RPM, parser.nextInt(0));
+        position.set("coolant", parser.nextInt(0));
+        position.set(Position.KEY_FUEL_LEVEL, parser.nextInt(0));
+        position.set(Position.KEY_FUEL_CONSUMPTION, parser.nextInt(0));
+        position.set(Position.PREFIX_TEMP + 1, parser.nextInt(0));
+        position.set(Position.KEY_CHARGE, parser.nextInt(0));
+        position.set("tpl", parser.nextInt(0));
+        position.set("axle", parser.nextInt(0));
+        position.set(Position.KEY_OBD_ODOMETER, parser.nextInt(0));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/JpKorjarProtocolDecoder.java b/src/org/traccar/protocol/JpKorjarProtocolDecoder.java
index 9a23a95fe..654b3e3d0 100644
--- a/src/org/traccar/protocol/JpKorjarProtocolDecoder.java
+++ b/src/org/traccar/protocol/JpKorjarProtocolDecoder.java
@@ -73,15 +73,15 @@ public class JpKorjarProtocolDecoder extends BaseProtocolDecoder {
 

         position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));

         position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));

-        position.setSpeed(parser.nextDouble());

-        position.setCourse(parser.nextDouble());

+        position.setSpeed(parser.nextDouble(0));

+        position.setCourse(parser.nextDouble(0));

 

-        position.set(Position.KEY_BATTERY, parser.nextDouble());

+        position.set(Position.KEY_BATTERY, parser.nextDouble(0));

 

-        position.setValid(parser.nextInt() == 1);

+        position.setValid(parser.nextInt(0) == 1);

 

         position.setNetwork(new Network(CellTower.from(

-                parser.nextInt(), parser.nextInt(), parser.nextInt(16), parser.nextInt(16))));

+                parser.nextInt(0), parser.nextInt(0), parser.nextHexInt(0), parser.nextHexInt(0))));

 

         return position;

     }

diff --git a/src/org/traccar/protocol/Jt600ProtocolDecoder.java b/src/org/traccar/protocol/Jt600ProtocolDecoder.java
index 05b4abbb0..ef20a9534 100644
--- a/src/org/traccar/protocol/Jt600ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Jt600ProtocolDecoder.java
@@ -194,13 +194,13 @@ public class Jt600ProtocolDecoder extends BaseProtocolDecoder {
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
 
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
 
-        position.set(Position.KEY_POWER, parser.nextDouble());
-        position.set(Position.KEY_GPS, parser.nextInt());
-        position.set(Position.KEY_RSSI, parser.nextInt());
-        position.set("alertType", parser.nextInt());
+        position.set(Position.KEY_POWER, parser.nextDouble(0));
+        position.set(Position.KEY_GPS, parser.nextInt(0));
+        position.set(Position.KEY_RSSI, parser.nextInt(0));
+        position.set("alertType", parser.nextInt(0));
 
         return position;
     }
@@ -253,19 +253,19 @@ public class Jt600ProtocolDecoder extends BaseProtocolDecoder {
         position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
         position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
 
-        position.setSpeed(UnitsConverter.knotsFromMph(parser.nextDouble()));
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromMph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
 
-        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
         position.set(Position.KEY_BATTERY, parser.next());
-        position.set(Position.KEY_STATUS, parser.nextInt(2));
+        position.set(Position.KEY_STATUS, parser.nextBinInt(0));
 
-        CellTower cellTower = CellTower.fromCidLac(parser.nextInt(), parser.nextInt());
-        cellTower.setSignalStrength(parser.nextInt());
+        CellTower cellTower = CellTower.fromCidLac(parser.nextInt(0), parser.nextInt(0));
+        cellTower.setSignalStrength(parser.nextInt(0));
         position.setNetwork(new Network(cellTower));
 
-        position.set(Position.KEY_ODOMETER, parser.nextLong() * 1000);
-        position.set(Position.KEY_INDEX, parser.nextInt());
+        position.set(Position.KEY_ODOMETER, parser.nextLong(0) * 1000);
+        position.set(Position.KEY_INDEX, parser.nextInt(0));
 
         if (channel != null) {
             if (type.equals("U01") || type.equals("U02") || type.equals("U03")) {
diff --git a/src/org/traccar/protocol/KenjiProtocolDecoder.java b/src/org/traccar/protocol/KenjiProtocolDecoder.java
index 43038ec94..4216da0c3 100644
--- a/src/org/traccar/protocol/KenjiProtocolDecoder.java
+++ b/src/org/traccar/protocol/KenjiProtocolDecoder.java
@@ -85,24 +85,24 @@ public class KenjiProtocolDecoder extends BaseProtocolDecoder {
         }
         position.setDeviceId(deviceSession.getDeviceId());
 
-        position.set(Position.KEY_ALARM, decodeAlarm(parser.nextInt(16)));
-        position.set(Position.KEY_OUTPUT, parser.nextInt(16));
-        position.set(Position.KEY_INPUT, parser.nextInt(16));
+        position.set(Position.KEY_ALARM, decodeAlarm(parser.nextHexInt(0)));
+        position.set(Position.KEY_OUTPUT, parser.nextHexInt(0));
+        position.set(Position.KEY_INPUT, parser.nextHexInt(0));
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
 
         position.setValid(parser.next().equals("A"));
 
         position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
         position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
-        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/L100ProtocolDecoder.java b/src/org/traccar/protocol/L100ProtocolDecoder.java
index b7c91bc7f..f98e532bc 100644
--- a/src/org/traccar/protocol/L100ProtocolDecoder.java
+++ b/src/org/traccar/protocol/L100ProtocolDecoder.java
@@ -92,26 +92,26 @@ public class L100ProtocolDecoder extends BaseProtocolDecoder {
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .setTime(parser.nextInt(0), 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());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
         position.set(Position.KEY_STATUS, parser.next());
         position.set(Position.PREFIX_ADC + 1, parser.next());
-        position.set(Position.KEY_ODOMETER, parser.nextDouble());
-        position.set(Position.PREFIX_TEMP + 1, parser.nextDouble());
-        position.set(Position.KEY_BATTERY, parser.nextDouble());
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0));
+        position.set(Position.PREFIX_TEMP + 1, parser.nextDouble(0));
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0));
 
-        int rssi = parser.nextInt();
+        int rssi = parser.nextInt(0);
         position.setNetwork(new Network(CellTower.from(
-                parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextInt(), rssi)));
+                parser.nextInt(0), parser.nextInt(0), parser.nextInt(0), parser.nextInt(0), rssi)));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/LaipacProtocolDecoder.java b/src/org/traccar/protocol/LaipacProtocolDecoder.java
index d0bc7583c..32d4ff0e6 100644
--- a/src/org/traccar/protocol/LaipacProtocolDecoder.java
+++ b/src/org/traccar/protocol/LaipacProtocolDecoder.java
@@ -76,17 +76,17 @@ public class LaipacProtocolDecoder extends BaseProtocolDecoder {
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
 
         String status = parser.next();
         position.setValid(status.toUpperCase().equals("A"));
 
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
         String type = parser.next();
diff --git a/src/org/traccar/protocol/MaestroProtocolDecoder.java b/src/org/traccar/protocol/MaestroProtocolDecoder.java
index dfda3d693..7d779a0a0 100644
--- a/src/org/traccar/protocol/MaestroProtocolDecoder.java
+++ b/src/org/traccar/protocol/MaestroProtocolDecoder.java
@@ -74,27 +74,27 @@ public class MaestroProtocolDecoder extends BaseProtocolDecoder {
         position.setProtocol(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
-        position.setValid(parser.nextInt() == 1);
+        position.setValid(parser.nextInt(0) == 1);
 
-        position.set(Position.KEY_BATTERY, parser.nextDouble());
-        position.set(Position.KEY_RSSI, parser.nextInt());
-        position.set(Position.KEY_CHARGE, parser.nextInt() == 1);
-        position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0));
+        position.set(Position.KEY_RSSI, parser.nextInt(0));
+        position.set(Position.KEY_CHARGE, parser.nextInt(0) == 1);
+        position.set(Position.KEY_IGNITION, parser.nextInt(0) == 1);
 
         position.setTime(parser.nextDateTime());
 
-        position.setLatitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
-        position.setSpeed(UnitsConverter.knotsFromMph(parser.nextDouble()));
-        position.setCourse(parser.nextDouble());
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromMph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
 
-        position.set(Position.KEY_SATELLITES, parser.nextInt());
-        position.set(Position.KEY_HDOP, parser.nextDouble());
-        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1609.34);
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+        position.set(Position.KEY_HDOP, parser.nextDouble(0));
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1609.34);
 
         if (parser.hasNext()) {
-            position.set(Position.PREFIX_ADC + 1, parser.nextInt());
+            position.set(Position.PREFIX_ADC + 1, parser.nextInt(0));
         }
 
         return position;
diff --git a/src/org/traccar/protocol/ManPowerProtocolDecoder.java b/src/org/traccar/protocol/ManPowerProtocolDecoder.java
index 08cb8b818..6cff8b961 100644
--- a/src/org/traccar/protocol/ManPowerProtocolDecoder.java
+++ b/src/org/traccar/protocol/ManPowerProtocolDecoder.java
@@ -73,7 +73,7 @@ public class ManPowerProtocolDecoder extends BaseProtocolDecoder {
         position.setValid(parser.next().equals("A"));
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
-        position.setSpeed(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/MegastekProtocolDecoder.java b/src/org/traccar/protocol/MegastekProtocolDecoder.java
index 6be4845a7..3501dce67 100644
--- a/src/org/traccar/protocol/MegastekProtocolDecoder.java
+++ b/src/org/traccar/protocol/MegastekProtocolDecoder.java
@@ -88,15 +88,15 @@ public class MegastekProtocolDecoder extends BaseProtocolDecoder {
         }
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .setTime(parser.nextInt(0), 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());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
         return true;
@@ -168,9 +168,9 @@ public class MegastekProtocolDecoder extends BaseProtocolDecoder {
 
                 position.set(Position.KEY_SATELLITES, parser.next());
 
-                position.setAltitude(parser.nextDouble());
+                position.setAltitude(parser.nextDouble(0));
 
-                position.set(Position.KEY_POWER, parser.nextDouble());
+                position.set(Position.KEY_POWER, parser.nextDouble(0));
 
                 String charger = parser.next();
                 if (charger != null) {
@@ -179,7 +179,7 @@ public class MegastekProtocolDecoder extends BaseProtocolDecoder {
 
                 if (parser.hasNext(4)) {
                     position.setNetwork(new Network(CellTower.from(
-                            parser.nextInt(), parser.nextInt(), parser.nextInt(16), parser.nextInt(16))));
+                            parser.nextInt(0), parser.nextInt(0), parser.nextHexInt(0), parser.nextHexInt(0))));
                 }
 
             } else {
@@ -203,8 +203,8 @@ public class MegastekProtocolDecoder extends BaseProtocolDecoder {
                 }
                 position.setDeviceId(deviceSession.getDeviceId());
 
-                position.setNetwork(new Network(CellTower.from(
-                        parser.nextInt(), parser.nextInt(), parser.nextInt(16), parser.nextInt(16), parser.nextInt())));
+                position.setNetwork(new Network(CellTower.from(parser.nextInt(0), parser.nextInt(0),
+                        parser.nextHexInt(0), parser.nextHexInt(0), parser.nextInt(0))));
 
                 position.set(Position.KEY_BATTERY, Double.parseDouble(parser.next()));
 
@@ -293,25 +293,25 @@ public class MegastekProtocolDecoder extends BaseProtocolDecoder {
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
 
-        position.set(Position.KEY_SATELLITES, parser.nextInt());
-        position.set(Position.KEY_HDOP, parser.nextDouble());
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+        position.set(Position.KEY_HDOP, parser.nextDouble(0));
 
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
 
         if (parser.hasNext()) {
-            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+            position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
         }
 
         position.setNetwork(new Network(CellTower.from(
-                parser.nextInt(), parser.nextInt(), parser.nextInt(16), parser.nextInt(16), parser.nextInt())));
+                parser.nextInt(0), parser.nextInt(0), parser.nextHexInt(0), parser.nextHexInt(0), parser.nextInt(0))));
 
-        position.set(Position.KEY_INPUT, parser.nextInt(2));
-        position.set(Position.KEY_OUTPUT, parser.nextInt(2));
+        position.set(Position.KEY_INPUT, parser.nextBinInt(0));
+        position.set(Position.KEY_OUTPUT, parser.nextBinInt(0));
 
         for (int i = 1; i <= 3; i++) {
-            position.set(Position.PREFIX_ADC + i, parser.nextInt());
+            position.set(Position.PREFIX_ADC + i, parser.nextInt(0));
         }
 
         for (int i = 1; i <= 2; i++) {
diff --git a/src/org/traccar/protocol/MeiligaoProtocolDecoder.java b/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
index af0b356a6..b947b2855 100644
--- a/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
+++ b/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
@@ -210,50 +210,50 @@ public class MeiligaoProtocolDecoder extends BaseProtocolDecoder {
         }
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
 
         position.setValid(parser.next().equals("A"));
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
 
         if (parser.hasNext()) {
-            position.setSpeed(parser.nextDouble());
+            position.setSpeed(parser.nextDouble(0));
         }
 
         if (parser.hasNext()) {
-            position.setCourse(parser.nextDouble());
+            position.setCourse(parser.nextDouble(0));
         }
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
         position.set(Position.KEY_HDOP, parser.next());
 
         if (parser.hasNext()) {
-            position.setAltitude(parser.nextDouble());
+            position.setAltitude(parser.nextDouble(0));
         }
 
         position.set(Position.KEY_STATUS, parser.next());
 
         for (int i = 1; i <= 8; i++) {
             if (parser.hasNext()) {
-                position.set(Position.PREFIX_ADC + i, parser.nextInt(16));
+                position.set(Position.PREFIX_ADC + i, parser.nextHexInt(0));
             }
         }
 
         if (parser.hasNext()) {
-            position.set(Position.KEY_RSSI, parser.nextInt(16));
+            position.set(Position.KEY_RSSI, parser.nextHexInt(0));
         }
 
         if (parser.hasNext()) {
-            position.set(Position.KEY_ODOMETER, parser.nextLong(16));
+            position.set(Position.KEY_ODOMETER, parser.nextLong(16, 0));
         }
         if (parser.hasNext()) {
-            position.set(Position.KEY_ODOMETER, parser.nextLong(16));
+            position.set(Position.KEY_ODOMETER, parser.nextLong(16, 0));
         }
 
         if (parser.hasNext()) {
-            position.set(Position.KEY_RFID, parser.nextInt(16));
+            position.set(Position.KEY_RFID, parser.nextHexInt(0));
         }
 
         return position;
@@ -282,21 +282,21 @@ public class MeiligaoProtocolDecoder extends BaseProtocolDecoder {
 
         getLastLocation(position, null);
 
-        position.set(Position.KEY_BATTERY, parser.nextDouble());
-        position.set(Position.KEY_RPM, parser.nextInt());
-        position.set(Position.KEY_OBD_SPEED, parser.nextInt());
-        position.set(Position.KEY_THROTTLE, parser.nextDouble());
-        position.set("engineLoad", parser.nextDouble());
-        position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
-        position.set(Position.KEY_FUEL_CONSUMPTION, parser.nextDouble());
-        position.set("averageFuelConsumption", parser.nextDouble());
-        position.set("drivingRange", parser.nextDouble());
-        position.set(Position.KEY_ODOMETER, parser.nextDouble());
-        position.set("singleFuelConsumption", parser.nextDouble());
-        position.set("totalFuelConsumption", parser.nextDouble());
-        position.set(Position.KEY_DTCS, parser.nextInt());
-        position.set("harshAcelerationNo", parser.nextInt());
-        position.set("harshBreakerNo", parser.nextInt());
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0));
+        position.set(Position.KEY_RPM, parser.nextInt(0));
+        position.set(Position.KEY_OBD_SPEED, parser.nextInt(0));
+        position.set(Position.KEY_THROTTLE, parser.nextDouble(0));
+        position.set("engineLoad", parser.nextDouble(0));
+        position.set(Position.PREFIX_TEMP + 1, parser.nextInt(0));
+        position.set(Position.KEY_FUEL_CONSUMPTION, parser.nextDouble(0));
+        position.set("averageFuelConsumption", parser.nextDouble(0));
+        position.set("drivingRange", parser.nextDouble(0));
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0));
+        position.set("singleFuelConsumption", parser.nextDouble(0));
+        position.set("totalFuelConsumption", parser.nextDouble(0));
+        position.set(Position.KEY_DTCS, parser.nextInt(0));
+        position.set("harshAcelerationNo", parser.nextInt(0));
+        position.set("harshBreakerNo", parser.nextInt(0));
 
         return position;
     }
@@ -309,15 +309,15 @@ public class MeiligaoProtocolDecoder extends BaseProtocolDecoder {
 
         getLastLocation(position, null);
 
-        position.set("totalIgnitionNo", parser.nextInt());
-        position.set("totalDrivingTime", parser.nextDouble());
-        position.set("totalIdlingTime", parser.nextDouble());
-        position.set("averageHotStartTime", parser.nextInt());
-        position.set("averageSpeed", parser.nextInt());
-        position.set("historyHighestSpeed", parser.nextInt());
-        position.set("historyHighestRpm", parser.nextInt());
-        position.set("totalHarshAccerleration", parser.nextInt());
-        position.set("totalHarshBrake", parser.nextInt());
+        position.set("totalIgnitionNo", parser.nextInt(0));
+        position.set("totalDrivingTime", parser.nextDouble(0));
+        position.set("totalIdlingTime", parser.nextDouble(0));
+        position.set("averageHotStartTime", parser.nextInt(0));
+        position.set("averageSpeed", parser.nextInt(0));
+        position.set("historyHighestSpeed", parser.nextInt(0));
+        position.set("historyHighestRpm", parser.nextInt(0));
+        position.set("totalHarshAccerleration", parser.nextInt(0));
+        position.set("totalHarshBrake", parser.nextInt(0));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/MeitrackProtocolDecoder.java b/src/org/traccar/protocol/MeitrackProtocolDecoder.java
index 9189d2a66..658359789 100644
--- a/src/org/traccar/protocol/MeitrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/MeitrackProtocolDecoder.java
@@ -121,43 +121,43 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
         }
         position.setDeviceId(deviceSession.getDeviceId());
 
-        int event = parser.nextInt();
+        int event = parser.nextInt(0);
         position.set(Position.KEY_EVENT, event);
         position.set(Position.KEY_ALARM, decodeAlarm(event));
 
-        position.setLatitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
 
         position.setTime(parser.nextDateTime());
 
         position.setValid(parser.next().equals("A"));
 
         position.set(Position.KEY_SATELLITES, parser.next());
-        int rssi = parser.nextInt();
+        int rssi = parser.nextInt(0);
 
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
 
         position.set(Position.KEY_HDOP, parser.next());
 
-        position.setAltitude(parser.nextDouble());
+        position.setAltitude(parser.nextDouble(0));
 
-        position.set(Position.KEY_ODOMETER, parser.nextInt());
+        position.set(Position.KEY_ODOMETER, parser.nextInt(0));
         position.set("runtime", parser.next());
 
-        position.setNetwork(new Network(
-                CellTower.from(parser.nextInt(), parser.nextInt(), parser.nextInt(16), parser.nextInt(16), rssi)));
+        position.setNetwork(new Network(CellTower.from(
+                parser.nextInt(0), parser.nextInt(0), parser.nextHexInt(0), parser.nextHexInt(0), rssi)));
 
         position.set(Position.KEY_STATUS, parser.next());
 
         for (int i = 1; i <= 3; i++) {
             if (parser.hasNext()) {
-                position.set(Position.PREFIX_ADC + i, parser.nextInt(16));
+                position.set(Position.PREFIX_ADC + i, parser.nextHexInt(0));
             }
         }
 
-        position.set(Position.KEY_BATTERY, parser.nextInt(16));
-        position.set(Position.KEY_POWER, parser.nextInt(16));
+        position.set(Position.KEY_BATTERY, parser.nextHexInt(0));
+        position.set(Position.KEY_POWER, parser.nextHexInt(0));
 
         String eventData = parser.next();
         if (eventData != null && !eventData.isEmpty()) {
diff --git a/src/org/traccar/protocol/MiniFinderProtocolDecoder.java b/src/org/traccar/protocol/MiniFinderProtocolDecoder.java
index c7b0aecb2..bb0057964 100644
--- a/src/org/traccar/protocol/MiniFinderProtocolDecoder.java
+++ b/src/org/traccar/protocol/MiniFinderProtocolDecoder.java
@@ -78,8 +78,8 @@ public class MiniFinderProtocolDecoder extends BaseProtocolDecoder {
     private void decodeFix(Position position, Parser parser) {
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
-        position.setLatitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
     }
 
     private void decodeFlags(Position position, int flags) {
@@ -114,25 +114,25 @@ public class MiniFinderProtocolDecoder extends BaseProtocolDecoder {
 
     private void decodeState(Position position, Parser parser) {
 
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
 
-        position.setCourse(parser.nextDouble());
+        position.setCourse(parser.nextDouble(0));
         if (position.getCourse() > 360) {
             position.setCourse(0);
         }
 
-        decodeFlags(position, parser.nextInt(16));
+        decodeFlags(position, parser.nextHexInt(0));
 
-        position.setAltitude(parser.nextDouble());
+        position.setAltitude(parser.nextDouble(0));
 
-        position.set(Position.KEY_BATTERY, parser.nextInt());
+        position.set(Position.KEY_BATTERY, parser.nextInt(0));
     }
 
     private void decodeGPSPrecision(Position position, Parser parser) {
 
-        position.set(Position.KEY_SATELLITES, parser.nextInt());
-        position.set(Position.KEY_SATELLITES_VISIBLE, parser.nextInt());
-        position.set(Position.KEY_HDOP, parser.nextDouble());
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+        position.set(Position.KEY_SATELLITES_VISIBLE, parser.nextInt(0));
+        position.set(Position.KEY_HDOP, parser.nextDouble(0));
     }
 
     @Override
diff --git a/src/org/traccar/protocol/MtxProtocolDecoder.java b/src/org/traccar/protocol/MtxProtocolDecoder.java
index 8ad4ad314..d7b572670 100644
--- a/src/org/traccar/protocol/MtxProtocolDecoder.java
+++ b/src/org/traccar/protocol/MtxProtocolDecoder.java
@@ -80,12 +80,12 @@ public class MtxProtocolDecoder extends BaseProtocolDecoder {
         position.setTime(parser.nextDateTime());
 
         position.setValid(true);
-        position.setLatitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
         position.set(Position.KEY_INPUT, parser.next());
         position.set(Position.KEY_OUTPUT, parser.next());
         position.set(Position.PREFIX_ADC + 1, parser.next());
diff --git a/src/org/traccar/protocol/PathAwayProtocolDecoder.java b/src/org/traccar/protocol/PathAwayProtocolDecoder.java
index 0a2204222..1c4531612 100644
--- a/src/org/traccar/protocol/PathAwayProtocolDecoder.java
+++ b/src/org/traccar/protocol/PathAwayProtocolDecoder.java
@@ -79,11 +79,11 @@ public class PathAwayProtocolDecoder extends BaseProtocolDecoder {
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
 
         position.setValid(true);
-        position.setLatitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
         if (channel != null) {
             HttpResponse response = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
diff --git a/src/org/traccar/protocol/PretraceProtocolDecoder.java b/src/org/traccar/protocol/PretraceProtocolDecoder.java
index dc83b7ed2..77d94068f 100644
--- a/src/org/traccar/protocol/PretraceProtocolDecoder.java
+++ b/src/org/traccar/protocol/PretraceProtocolDecoder.java
@@ -81,14 +81,14 @@ public class PretraceProtocolDecoder extends BaseProtocolDecoder {
 
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
-        position.setCourse(parser.nextInt());
-        position.setAltitude(parser.nextInt(16));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt(0)));
+        position.setCourse(parser.nextInt(0));
+        position.setAltitude(parser.nextHexInt(0));
 
-        position.set(Position.KEY_ODOMETER, parser.nextInt(16));
-        position.set(Position.KEY_SATELLITES, parser.nextInt(16));
-        position.set(Position.KEY_HDOP, parser.nextInt());
-        position.set(Position.KEY_RSSI, parser.nextInt());
+        position.set(Position.KEY_ODOMETER, parser.nextHexInt(0));
+        position.set(Position.KEY_SATELLITES, parser.nextHexInt(0));
+        position.set(Position.KEY_HDOP, parser.nextInt(0));
+        position.set(Position.KEY_RSSI, parser.nextInt(0));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/Pt3000ProtocolDecoder.java b/src/org/traccar/protocol/Pt3000ProtocolDecoder.java
index 11df9d218..c36be7976 100644
--- a/src/org/traccar/protocol/Pt3000ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Pt3000ProtocolDecoder.java
@@ -66,15 +66,15 @@ public class Pt3000ProtocolDecoder extends BaseProtocolDecoder {
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .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());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
         return position;
diff --git a/src/org/traccar/protocol/Pt502ProtocolDecoder.java b/src/org/traccar/protocol/Pt502ProtocolDecoder.java
index e2d7f059a..eb86f01ff 100644
--- a/src/org/traccar/protocol/Pt502ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Pt502ProtocolDecoder.java
@@ -109,15 +109,15 @@ public class Pt502ProtocolDecoder extends BaseProtocolDecoder {
         position.setDeviceId(deviceSession.getDeviceId());

 

         DateBuilder dateBuilder = new DateBuilder()

-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextInt());

+                .setTime(parser.nextInt(0), 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());

-        position.setCourse(parser.nextDouble());

+        position.setSpeed(parser.nextDouble(0));

+        position.setCourse(parser.nextDouble(0));

 

-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());

+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));

         position.setTime(dateBuilder.getDate());

 

         position.set(Position.KEY_INPUT, parser.next());

@@ -130,11 +130,11 @@ public class Pt502ProtocolDecoder extends BaseProtocolDecoder {
             }

         }

 

-        position.set(Position.KEY_ODOMETER, parser.nextInt());

+        position.set(Position.KEY_ODOMETER, parser.nextInt(0));

         position.set(Position.KEY_RFID, parser.next());

 

         if (parser.hasNext()) {

-            int value = parser.nextInt(16);

+            int value = parser.nextHexInt(0);

             position.set(Position.KEY_BATTERY, value >> 8);

             position.set(Position.KEY_RSSI, (value >> 4) & 0xf);

             position.set(Position.KEY_SATELLITES, value & 0xf);

diff --git a/src/org/traccar/protocol/RaveonProtocolDecoder.java b/src/org/traccar/protocol/RaveonProtocolDecoder.java
index 1fd5e6636..75027246e 100644
--- a/src/org/traccar/protocol/RaveonProtocolDecoder.java
+++ b/src/org/traccar/protocol/RaveonProtocolDecoder.java
@@ -77,19 +77,19 @@ public class RaveonProtocolDecoder extends BaseProtocolDecoder {
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS));
 
-        position.setValid(parser.nextInt() != 0);
+        position.setValid(parser.nextInt(0) != 0);
 
-        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
 
-        position.setAltitude(parser.nextInt());
+        position.setAltitude(parser.nextInt(0));
 
-        position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
-        position.set(Position.KEY_POWER, parser.nextDouble());
-        position.set(Position.KEY_INPUT, parser.nextInt());
-        position.set(Position.KEY_RSSI, parser.nextInt());
+        position.set(Position.PREFIX_TEMP + 1, parser.nextInt(0));
+        position.set(Position.KEY_POWER, parser.nextDouble(0));
+        position.set(Position.KEY_INPUT, parser.nextInt(0));
+        position.set(Position.KEY_RSSI, parser.nextInt(0));
 
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
-        position.setCourse(parser.nextInt());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt(0)));
+        position.setCourse(parser.nextInt(0));
 
         position.set(Position.KEY_ALARM, parser.next());
 
diff --git a/src/org/traccar/protocol/RitiProtocolDecoder.java b/src/org/traccar/protocol/RitiProtocolDecoder.java
index fd31ee4e2..5c298e8c5 100644
--- a/src/org/traccar/protocol/RitiProtocolDecoder.java
+++ b/src/org/traccar/protocol/RitiProtocolDecoder.java
@@ -85,15 +85,15 @@ public class RitiProtocolDecoder extends BaseProtocolDecoder {
         }
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .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());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
         return position;
diff --git a/src/org/traccar/protocol/SanavProtocolDecoder.java b/src/org/traccar/protocol/SanavProtocolDecoder.java
index bd49585f6..c736b2ba3 100644
--- a/src/org/traccar/protocol/SanavProtocolDecoder.java
+++ b/src/org/traccar/protocol/SanavProtocolDecoder.java
@@ -69,15 +69,15 @@ public class SanavProtocolDecoder extends BaseProtocolDecoder {
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .setTime(parser.nextInt(0), 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());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
         return position;
diff --git a/src/org/traccar/protocol/SiwiProtocolDecoder.java b/src/org/traccar/protocol/SiwiProtocolDecoder.java
index 76b1e4322..198df24d5 100644
--- a/src/org/traccar/protocol/SiwiProtocolDecoder.java
+++ b/src/org/traccar/protocol/SiwiProtocolDecoder.java
@@ -76,17 +76,17 @@ public class SiwiProtocolDecoder extends BaseProtocolDecoder {
 
         position.set(Position.KEY_EVENT, parser.next());
         position.set(Position.KEY_IGNITION, parser.next().equals("1"));
-        position.set(Position.KEY_ODOMETER, parser.nextInt());
+        position.set(Position.KEY_ODOMETER, parser.nextInt(0));
 
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt(0)));
 
-        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
 
         position.setValid(parser.next().equals("A"));
-        position.setLatitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
-        position.setCourse(parser.nextInt());
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+        position.setCourse(parser.nextInt(0));
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY, "IST"));
 
diff --git a/src/org/traccar/protocol/StarLinkProtocolDecoder.java b/src/org/traccar/protocol/StarLinkProtocolDecoder.java
index 97091257f..0e9840766 100644
--- a/src/org/traccar/protocol/StarLinkProtocolDecoder.java
+++ b/src/org/traccar/protocol/StarLinkProtocolDecoder.java
@@ -83,7 +83,7 @@ public class StarLinkProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        int type = parser.nextInt();
+        int type = parser.nextInt(0);
         if (type != MSG_EVENT_REPORT) {
             return null;
         }
@@ -93,7 +93,7 @@ public class StarLinkProtocolDecoder extends BaseProtocolDecoder {
         position.setDeviceId(deviceSession.getDeviceId());
         position.setValid(true);
 
-        position.set(Position.KEY_INDEX, parser.nextInt());
+        position.set(Position.KEY_INDEX, parser.nextInt(0));
 
         String[] data = parser.next().split(",");
         Integer lac = null, cid = null;
diff --git a/src/org/traccar/protocol/Stl060ProtocolDecoder.java b/src/org/traccar/protocol/Stl060ProtocolDecoder.java
index 599c16a3c..c81e83aab 100644
--- a/src/org/traccar/protocol/Stl060ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Stl060ProtocolDecoder.java
@@ -88,28 +88,28 @@ public class Stl060ProtocolDecoder extends BaseProtocolDecoder {
 
         position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_MIN_MIN_HEM));
         position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_MIN_MIN_HEM));
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
         // Old format
         if (parser.hasNext(5)) {
-            position.set(Position.KEY_ODOMETER, parser.nextInt());
-            position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
-            position.set(Position.KEY_INPUT, parser.nextInt() + parser.nextInt() << 1);
-            position.set(Position.KEY_FUEL_LEVEL, parser.nextInt());
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0));
+            position.set(Position.KEY_IGNITION, parser.nextInt(0) == 1);
+            position.set(Position.KEY_INPUT, parser.nextInt(0) + parser.nextInt(0) << 1);
+            position.set(Position.KEY_FUEL_LEVEL, parser.nextInt(0));
         }
 
         // New format
         if (parser.hasNext(10)) {
-            position.set(Position.KEY_CHARGE, parser.nextInt() == 1);
-            position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
-            position.set(Position.KEY_INPUT, parser.nextInt());
+            position.set(Position.KEY_CHARGE, parser.nextInt(0) == 1);
+            position.set(Position.KEY_IGNITION, parser.nextInt(0) == 1);
+            position.set(Position.KEY_INPUT, parser.nextInt(0));
             position.set(Position.KEY_RFID, parser.next());
-            position.set(Position.KEY_ODOMETER, parser.nextInt());
-            position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
-            position.set(Position.KEY_FUEL_LEVEL, parser.nextInt());
-            position.set(Position.KEY_ACCELERATION, parser.nextInt() == 1);
-            position.set(Position.KEY_OUTPUT, parser.nextInt() + parser.nextInt() << 1);
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0));
+            position.set(Position.PREFIX_TEMP + 1, parser.nextInt(0));
+            position.set(Position.KEY_FUEL_LEVEL, parser.nextInt(0));
+            position.set(Position.KEY_ACCELERATION, parser.nextInt(0) == 1);
+            position.set(Position.KEY_OUTPUT, parser.nextInt(0) + parser.nextInt(0) << 1);
         }
 
         position.setValid(parser.next().equals("A"));
diff --git a/src/org/traccar/protocol/SupermateProtocolDecoder.java b/src/org/traccar/protocol/SupermateProtocolDecoder.java
index 17e870950..d9b58a7f4 100644
--- a/src/org/traccar/protocol/SupermateProtocolDecoder.java
+++ b/src/org/traccar/protocol/SupermateProtocolDecoder.java
@@ -19,6 +19,7 @@ import org.jboss.netty.buffer.ChannelBuffers;
 import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
 import org.traccar.DeviceSession;
+import org.traccar.helper.DateBuilder;
 import org.traccar.helper.Parser;
 import org.traccar.helper.PatternBuilder;
 import org.traccar.model.Position;
@@ -79,28 +80,31 @@ public class SupermateProtocolDecoder extends BaseProtocolDecoder {
 
         position.setValid(parser.next().equals("A"));
 
-        position.setTime(parser.nextDateTime(16));
+        DateBuilder dateBuilder = new DateBuilder()
+                .setDate(parser.nextHexInt(0), parser.nextHexInt(0), parser.nextHexInt(0))
+                .setTime(parser.nextHexInt(0), parser.nextHexInt(0), parser.nextHexInt(0));
+        position.setTime(dateBuilder.getDate());
 
-        if (parser.nextInt(16) == 8) {
-            position.setLatitude(-parser.nextInt(16) / 600000.0);
+        if (parser.nextHexInt(0) == 8) {
+            position.setLatitude(-parser.nextHexInt(0) / 600000.0);
         } else {
-            position.setLatitude(parser.nextInt(16) / 600000.0);
+            position.setLatitude(parser.nextHexInt(0) / 600000.0);
         }
 
-        if (parser.nextInt(16) == 8) {
-            position.setLongitude(-parser.nextInt(16) / 600000.0);
+        if (parser.nextHexInt(0) == 8) {
+            position.setLongitude(-parser.nextHexInt(0) / 600000.0);
         } else {
-            position.setLongitude(parser.nextInt(16) / 600000.0);
+            position.setLongitude(parser.nextHexInt(0) / 600000.0);
         }
 
-        position.setSpeed(parser.nextInt(16) / 100.0);
-        position.setCourse(parser.nextInt(16) / 100.0);
+        position.setSpeed(parser.nextHexInt(0) / 100.0);
+        position.setCourse(parser.nextHexInt(0) / 100.0);
 
         position.set(Position.KEY_STATUS, parser.next());
         position.set("signal", parser.next());
-        position.set(Position.KEY_POWER, parser.nextDouble());
-        position.set("oil", parser.nextInt(16));
-        position.set(Position.KEY_ODOMETER, parser.nextInt(16));
+        position.set(Position.KEY_POWER, parser.nextDouble(0));
+        position.set("oil", parser.nextHexInt(0));
+        position.set(Position.KEY_ODOMETER, parser.nextHexInt(0));
 
         if (channel != null) {
             Calendar calendar = Calendar.getInstance();
diff --git a/src/org/traccar/protocol/T55ProtocolDecoder.java b/src/org/traccar/protocol/T55ProtocolDecoder.java
index c60c92d45..efd647ad3 100644
--- a/src/org/traccar/protocol/T55ProtocolDecoder.java
+++ b/src/org/traccar/protocol/T55ProtocolDecoder.java
@@ -115,15 +115,15 @@ public class T55ProtocolDecoder extends BaseProtocolDecoder {
         }
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .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());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
         if (parser.hasNext(5)) {
@@ -136,8 +136,8 @@ public class T55ProtocolDecoder extends BaseProtocolDecoder {
             position.setDeviceId(deviceSession.getDeviceId());
 
             position.set(Position.KEY_IGNITION, parser.hasNext() && parser.next().equals("1"));
-            position.set(Position.KEY_FUEL_LEVEL, parser.nextInt());
-            position.set(Position.KEY_BATTERY, parser.nextInt());
+            position.set(Position.KEY_FUEL_LEVEL, parser.nextInt(0));
+            position.set(Position.KEY_BATTERY, parser.nextInt(0));
         }
 
         if (parser.hasNext()) {
@@ -168,7 +168,7 @@ public class T55ProtocolDecoder extends BaseProtocolDecoder {
 
         DateBuilder dateBuilder = new DateBuilder()
                 .setCurrentDate()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
         position.setValid(true);
@@ -193,8 +193,8 @@ public class T55ProtocolDecoder extends BaseProtocolDecoder {
         position.setValid(parser.next().equals("A"));
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
         return position;
     }
@@ -213,11 +213,11 @@ public class T55ProtocolDecoder extends BaseProtocolDecoder {
         position.setTime(parser.nextDateTime());
 
         position.setValid(parser.next().equals("A"));
-        position.setLatitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
 
         position.set(Position.KEY_BATTERY, parser.next());
 
diff --git a/src/org/traccar/protocol/TaipProtocolDecoder.java b/src/org/traccar/protocol/TaipProtocolDecoder.java
index 2e37bbd57..280db0b31 100644
--- a/src/org/traccar/protocol/TaipProtocolDecoder.java
+++ b/src/org/traccar/protocol/TaipProtocolDecoder.java
@@ -105,14 +105,14 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
         position.setProtocol(getProtocolName());
 
         if (parser.hasNext(3)) {
-            position.set(Position.KEY_EVENT, parser.nextInt());
-            position.setTime(getTime(parser.nextInt(), parser.nextInt(), parser.nextInt()));
+            position.set(Position.KEY_EVENT, parser.nextInt(0));
+            position.setTime(getTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0)));
         } else if (parser.hasNext()) {
-            position.setTime(getTime(parser.nextInt()));
+            position.setTime(getTime(parser.nextInt(0)));
         }
 
         if (parser.hasNext()) {
-            position.set(Position.KEY_EVENT, parser.nextInt());
+            position.set(Position.KEY_EVENT, parser.nextInt(0));
         }
 
         if (parser.hasNext(6)) {
@@ -128,17 +128,17 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
             position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
         }
 
-        position.setSpeed(UnitsConverter.knotsFromMph(parser.nextDouble()));
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromMph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
 
         if (parser.hasNext(4)) {
-            position.set(Position.KEY_INPUT, parser.nextInt(16));
-            position.set(Position.KEY_SATELLITES, parser.nextInt(16));
-            position.set(Position.KEY_BATTERY, parser.nextInt());
-            position.set(Position.KEY_ODOMETER, parser.nextLong(16));
+            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(parser.nextInt() != 0);
+        position.setValid(parser.nextInt(0) != 0);
 
         String[] attributes = null;
         beginIndex = sentence.indexOf(';');
diff --git a/src/org/traccar/protocol/TelicProtocolDecoder.java b/src/org/traccar/protocol/TelicProtocolDecoder.java
index 579a6466b..62b756ab5 100644
--- a/src/org/traccar/protocol/TelicProtocolDecoder.java
+++ b/src/org/traccar/protocol/TelicProtocolDecoder.java
@@ -96,7 +96,7 @@ public class TelicProtocolDecoder extends BaseProtocolDecoder {
         }
         position.setDeviceId(deviceSession.getDeviceId());
 
-        int event = parser.nextInt();
+        int event = parser.nextInt(0);
         position.set(Position.KEY_EVENT, event);
 
         position.set(Position.KEY_ALARM, decodeAlarm(event));
@@ -115,19 +115,19 @@ public class TelicProtocolDecoder extends BaseProtocolDecoder {
         }
 
         if (parser.hasNext(2)) {
-            position.setLongitude(parser.nextDouble() / 10000);
-            position.setLatitude(parser.nextDouble() / 10000);
+            position.setLongitude(parser.nextDouble(0) / 10000);
+            position.setLatitude(parser.nextDouble(0) / 10000);
         }
 
-        position.setValid(parser.nextInt() != 1);
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
-        position.setCourse(parser.nextDouble());
+        position.setValid(parser.nextInt(0) != 1);
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
 
         if (parser.hasNext()) {
-            position.set(Position.KEY_SATELLITES, parser.nextInt());
+            position.set(Position.KEY_SATELLITES, parser.nextInt(0));
         }
 
-        position.set(Position.KEY_BATTERY, parser.nextInt());
+        position.set(Position.KEY_BATTERY, parser.nextInt(0));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/Tk102ProtocolDecoder.java b/src/org/traccar/protocol/Tk102ProtocolDecoder.java
index 45e151897..41d5b7436 100644
--- a/src/org/traccar/protocol/Tk102ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Tk102ProtocolDecoder.java
@@ -122,14 +122,14 @@ public class Tk102ProtocolDecoder extends BaseProtocolDecoder {
             position.setDeviceId(deviceSession.getDeviceId());
 
             DateBuilder dateBuilder = new DateBuilder()
-                    .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                    .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());
+            position.setSpeed(parser.nextDouble(0));
 
-            dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+            dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
             position.setTime(dateBuilder.getDate());
 
             return position;
diff --git a/src/org/traccar/protocol/Tk103ProtocolDecoder.java b/src/org/traccar/protocol/Tk103ProtocolDecoder.java
index 64314f6c8..baaa6c6fe 100644
--- a/src/org/traccar/protocol/Tk103ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Tk103ProtocolDecoder.java
@@ -140,12 +140,12 @@ public class Tk103ProtocolDecoder extends BaseProtocolDecoder {
 
             getLastLocation(position, parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
 
-            int battery = parser.nextInt();
+            int battery = parser.nextInt(0);
             if (battery != 65535) {
                 position.set(Position.KEY_BATTERY, battery * 0.01);
             }
 
-            int power = parser.nextInt();
+            int power = parser.nextInt(0);
             if (power != 65535) {
                 position.set(Position.KEY_POWER, power * 0.1);
             }
@@ -164,7 +164,7 @@ public class Tk103ProtocolDecoder extends BaseProtocolDecoder {
             getLastLocation(position, null);
 
             position.setNetwork(new Network(CellTower.from(
-                    parser.nextInt(), parser.nextInt(), parser.nextInt(16), parser.nextInt(16))));
+                    parser.nextInt(0), parser.nextInt(0), parser.nextHexInt(0), parser.nextHexInt(0))));
 
             return position;
         }
@@ -187,9 +187,9 @@ public class Tk103ProtocolDecoder extends BaseProtocolDecoder {
 
         DateBuilder dateBuilder = new DateBuilder();
         if (parser.next() == null) {
-            dateBuilder.setDate(parser.nextInt(), parser.nextInt(), parser.nextInt());
+            dateBuilder.setDate(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         } else {
-            dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+            dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         }
 
         position.setValid(parser.next().equals("A"));
@@ -198,20 +198,20 @@ public class Tk103ProtocolDecoder extends BaseProtocolDecoder {
 
         switch (Context.getConfig().getString(getProtocolName() + ".speed", "kmh")) {
             case "kn":
-                position.setSpeed(parser.nextDouble());
+                position.setSpeed(parser.nextDouble(0));
                 break;
             case "mph":
-                position.setSpeed(UnitsConverter.knotsFromMph(parser.nextDouble()));
+                position.setSpeed(UnitsConverter.knotsFromMph(parser.nextDouble(0)));
                 break;
             default:
-                position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+                position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
                 break;
         }
 
-        dateBuilder.setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
-        position.setCourse(parser.nextDouble());
+        position.setCourse(parser.nextDouble(0));
 
         String status = parser.next();
         if (status != null) {
@@ -224,11 +224,11 @@ public class Tk103ProtocolDecoder extends BaseProtocolDecoder {
         position.set(Position.KEY_STATUS, parser.next()); // hex status
 
         if (parser.hasNext()) {
-            position.set(Position.KEY_ODOMETER, parser.nextLong(16));
+            position.set(Position.KEY_ODOMETER, parser.nextLong(16, 0));
         }
 
         if (parser.hasNext()) {
-            position.set(Position.PREFIX_TEMP + 1, parser.nextDouble());
+            position.set(Position.PREFIX_TEMP + 1, parser.nextDouble(0));
         }
 
         return position;
diff --git a/src/org/traccar/protocol/Tlt2hProtocolDecoder.java b/src/org/traccar/protocol/Tlt2hProtocolDecoder.java
index 1d6093b94..cbc851de0 100644
--- a/src/org/traccar/protocol/Tlt2hProtocolDecoder.java
+++ b/src/org/traccar/protocol/Tlt2hProtocolDecoder.java
@@ -91,15 +91,15 @@ public class Tlt2hProtocolDecoder extends BaseProtocolDecoder {
                 parser.next(); // base station info
 
                 DateBuilder dateBuilder = new DateBuilder()
-                        .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                        .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());
-                position.setCourse(parser.nextDouble());
+                position.setSpeed(parser.nextDouble(0));
+                position.setCourse(parser.nextDouble(0));
 
-                dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
                 position.setTime(dateBuilder.getDate());
 
                 position.set(Position.KEY_STATUS, status);
diff --git a/src/org/traccar/protocol/TmgProtocolDecoder.java b/src/org/traccar/protocol/TmgProtocolDecoder.java
index 223f1e419..c10523117 100644
--- a/src/org/traccar/protocol/TmgProtocolDecoder.java
+++ b/src/org/traccar/protocol/TmgProtocolDecoder.java
@@ -115,24 +115,24 @@ public class TmgProtocolDecoder extends BaseProtocolDecoder {
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
 
-        position.setValid(parser.nextInt() > 0);
+        position.setValid(parser.nextInt(0) > 0);
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
-        position.setCourse(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
 
-        position.set(Position.KEY_HDOP, parser.nextDouble());
-        position.set(Position.KEY_SATELLITES, parser.nextInt());
-        position.set(Position.KEY_SATELLITES_VISIBLE, parser.nextInt());
+        position.set(Position.KEY_HDOP, parser.nextDouble(0));
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+        position.set(Position.KEY_SATELLITES_VISIBLE, parser.nextInt(0));
         position.set(Position.KEY_OPERATOR, parser.next());
-        position.set(Position.KEY_RSSI, parser.nextInt());
-        position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
-        position.set(Position.KEY_BATTERY, parser.nextDouble());
-        position.set(Position.KEY_POWER, parser.nextDouble());
+        position.set(Position.KEY_RSSI, parser.nextInt(0));
+        position.set(Position.KEY_IGNITION, parser.nextInt(0) == 1);
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0));
+        position.set(Position.KEY_POWER, parser.nextDouble(0));
 
-        int input = parser.nextInt(2);
-        int output = parser.nextInt(2);
+        int input = parser.nextBinInt(0);
+        int output = parser.nextBinInt(0);
 
         if (!BitUtil.check(input, 0)) {
             position.set(Position.KEY_ALARM, Position.ALARM_SOS);
@@ -141,8 +141,8 @@ public class TmgProtocolDecoder extends BaseProtocolDecoder {
         position.set(Position.KEY_INPUT, input);
         position.set(Position.KEY_OUTPUT, output);
 
-        position.set(Position.PREFIX_ADC + 1, parser.nextDouble());
-        position.set(Position.PREFIX_ADC + 2, parser.nextDouble());
+        position.set(Position.PREFIX_ADC + 1, parser.nextDouble(0));
+        position.set(Position.PREFIX_ADC + 2, parser.nextDouble(0));
         position.set(Position.KEY_VERSION_FW, parser.next());
         position.set(Position.KEY_RFID, parser.next());
 
diff --git a/src/org/traccar/protocol/TopflytechProtocolDecoder.java b/src/org/traccar/protocol/TopflytechProtocolDecoder.java
index 2f853982f..837ca2557 100644
--- a/src/org/traccar/protocol/TopflytechProtocolDecoder.java
+++ b/src/org/traccar/protocol/TopflytechProtocolDecoder.java
@@ -67,8 +67,8 @@ public class TopflytechProtocolDecoder extends BaseProtocolDecoder {
         position.setValid(parser.next().equals("A"));
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/TotemProtocolDecoder.java b/src/org/traccar/protocol/TotemProtocolDecoder.java
index 54eb2b5a5..d2ceebde9 100644
--- a/src/org/traccar/protocol/TotemProtocolDecoder.java
+++ b/src/org/traccar/protocol/TotemProtocolDecoder.java
@@ -220,22 +220,22 @@ public class TotemProtocolDecoder extends BaseProtocolDecoder {
             DateBuilder dateBuilder = new DateBuilder();
             int year = 0, month = 0, day = 0;
             if (pattern == PATTERN2) {
-                day   = parser.nextInt();
-                month = parser.nextInt();
-                year  = parser.nextInt();
+                day   = parser.nextInt(0);
+                month = parser.nextInt(0);
+                year  = parser.nextInt(0);
             }
-            dateBuilder.setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+            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());
-            position.setCourse(parser.nextDouble());
+            position.setSpeed(parser.nextDouble(0));
+            position.setCourse(parser.nextDouble(0));
 
             if (pattern == PATTERN1) {
-                day   = parser.nextInt();
-                month = parser.nextInt();
-                year  = parser.nextInt();
+                day   = parser.nextInt(0);
+                month = parser.nextInt(0);
+                year  = parser.nextInt(0);
             }
             if (year == 0) {
                 return null; // ignore invalid data
@@ -253,17 +253,17 @@ public class TotemProtocolDecoder extends BaseProtocolDecoder {
 
             position.set(Position.PREFIX_IO + 1, parser.next());
             position.set(Position.KEY_BATTERY, parser.next());
-            position.set(Position.KEY_POWER, parser.nextDouble());
+            position.set(Position.KEY_POWER, parser.nextDouble(0));
             position.set(Position.PREFIX_ADC + 1, parser.next());
 
-            int lac = parser.nextInt(16);
-            int cid = parser.nextInt(16);
+            int lac = parser.nextHexInt(0);
+            int cid = parser.nextHexInt(0);
             if (lac != 0 && cid != 0) {
                 position.setNetwork(new Network(CellTower.fromLacCid(lac, cid)));
             }
 
             position.set(Position.PREFIX_TEMP + 1, parser.next());
-            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+            position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
 
         } else if (pattern == PATTERN3) {
             if (parser.hasNext()) {
@@ -273,22 +273,22 @@ public class TotemProtocolDecoder extends BaseProtocolDecoder {
             position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
 
             position.set(Position.PREFIX_IO + 1, parser.next());
-            position.set(Position.KEY_BATTERY, parser.nextDouble() * 0.1);
-            position.set(Position.KEY_POWER, parser.nextDouble());
+            position.set(Position.KEY_BATTERY, parser.nextDouble(0) * 0.1);
+            position.set(Position.KEY_POWER, parser.nextDouble(0));
             position.set(Position.PREFIX_ADC + 1, parser.next());
             position.set(Position.PREFIX_ADC + 2, parser.next());
             position.set(Position.PREFIX_TEMP + 1, parser.next());
             position.set(Position.PREFIX_TEMP + 2, parser.next());
 
             position.setNetwork(new Network(
-                    CellTower.fromLacCid(parser.nextInt(16), parser.nextInt(16))));
+                    CellTower.fromLacCid(parser.nextHexInt(0), parser.nextHexInt(0))));
 
             position.setValid(parser.next().equals("A"));
             position.set(Position.KEY_SATELLITES, parser.next());
-            position.setCourse(parser.nextDouble());
-            position.setSpeed(parser.nextDouble());
+            position.setCourse(parser.nextDouble(0));
+            position.setSpeed(parser.nextDouble(0));
             position.set(Position.KEY_PDOP, parser.next());
-            position.set(Position.KEY_ODOMETER, parser.nextInt() * 1000);
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0) * 1000);
 
             position.setLatitude(parser.nextCoordinate());
             position.setLongitude(parser.nextCoordinate());
@@ -298,8 +298,8 @@ public class TotemProtocolDecoder extends BaseProtocolDecoder {
 
             position.setTime(parser.nextDateTime());
 
-            position.set(Position.KEY_BATTERY, parser.nextDouble() * 0.1);
-            position.set(Position.KEY_POWER, parser.nextDouble());
+            position.set(Position.KEY_BATTERY, parser.nextDouble(0) * 0.1);
+            position.set(Position.KEY_POWER, parser.nextDouble(0));
 
             position.set(Position.PREFIX_ADC + 1, parser.next());
             position.set(Position.PREFIX_ADC + 2, parser.next());
@@ -308,15 +308,15 @@ public class TotemProtocolDecoder extends BaseProtocolDecoder {
             position.set(Position.PREFIX_TEMP + 1, parser.next());
             position.set(Position.PREFIX_TEMP + 2, parser.next());
 
-            CellTower cellTower = CellTower.fromLacCid(parser.nextInt(16), parser.nextInt(16));
-            position.set(Position.KEY_SATELLITES, parser.nextInt());
-            cellTower.setSignalStrength(parser.nextInt());
+            CellTower cellTower = CellTower.fromLacCid(parser.nextHexInt(0), parser.nextHexInt(0));
+            position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+            cellTower.setSignalStrength(parser.nextInt(0));
             position.setNetwork(new Network(cellTower));
 
-            position.setCourse(parser.nextDouble());
-            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
-            position.set(Position.KEY_HDOP, parser.nextDouble());
-            position.set(Position.KEY_ODOMETER, parser.nextInt() * 1000);
+            position.setCourse(parser.nextDouble(0));
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+            position.set(Position.KEY_HDOP, parser.nextDouble(0));
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0) * 1000);
 
             position.setValid(true);
             position.setLatitude(parser.nextCoordinate());
diff --git a/src/org/traccar/protocol/Tr20ProtocolDecoder.java b/src/org/traccar/protocol/Tr20ProtocolDecoder.java
index 605a1e0b5..403a2fda2 100644
--- a/src/org/traccar/protocol/Tr20ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Tr20ProtocolDecoder.java
@@ -85,8 +85,8 @@ public class Tr20ProtocolDecoder extends BaseProtocolDecoder {
 
         position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
         position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/Tr900ProtocolDecoder.java b/src/org/traccar/protocol/Tr900ProtocolDecoder.java
index a566c637c..dda91eed5 100644
--- a/src/org/traccar/protocol/Tr900ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Tr900ProtocolDecoder.java
@@ -72,19 +72,19 @@ public class Tr900ProtocolDecoder extends BaseProtocolDecoder {
         }
         position.setDeviceId(deviceSession.getDeviceId());
 
-        position.setValid(parser.nextInt() == 1);
+        position.setValid(parser.nextInt(0) == 1);
 
         position.setTime(parser.nextDateTime());
 
         position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
         position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
         position.set(Position.KEY_RSSI, parser.next());
-        position.set(Position.KEY_EVENT, parser.nextInt());
-        position.set(Position.PREFIX_ADC + 1, parser.nextInt());
-        position.set(Position.KEY_BATTERY, parser.nextInt());
+        position.set(Position.KEY_EVENT, parser.nextInt(0));
+        position.set(Position.PREFIX_ADC + 1, parser.nextInt(0));
+        position.set(Position.KEY_BATTERY, parser.nextInt(0));
         position.set(Position.KEY_INPUT, parser.next());
         position.set(Position.KEY_STATUS, parser.next());
 
diff --git a/src/org/traccar/protocol/TrackboxProtocolDecoder.java b/src/org/traccar/protocol/TrackboxProtocolDecoder.java
index 677f88cdc..deb2f2775 100644
--- a/src/org/traccar/protocol/TrackboxProtocolDecoder.java
+++ b/src/org/traccar/protocol/TrackboxProtocolDecoder.java
@@ -82,23 +82,23 @@ public class TrackboxProtocolDecoder extends BaseProtocolDecoder {
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
 
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
 
         position.set(Position.KEY_HDOP, parser.next());
 
-        position.setAltitude(parser.nextDouble());
+        position.setAltitude(parser.nextDouble(0));
 
-        int fix = parser.nextInt();
+        int fix = parser.nextInt(0);
         position.set(Position.KEY_GPS, fix);
         position.setValid(fix > 0);
 
-        position.setCourse(parser.nextDouble());
-        position.setSpeed(parser.nextDouble());
+        position.setCourse(parser.nextDouble(0));
+        position.setSpeed(parser.nextDouble(0));
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
         position.set(Position.KEY_SATELLITES, parser.next());
diff --git a/src/org/traccar/protocol/TrakMateProtocolDecoder.java b/src/org/traccar/protocol/TrakMateProtocolDecoder.java
index 03ec6cc67..18718cda0 100644
--- a/src/org/traccar/protocol/TrakMateProtocolDecoder.java
+++ b/src/org/traccar/protocol/TrakMateProtocolDecoder.java
@@ -116,8 +116,8 @@ public class TrakMateProtocolDecoder extends BaseProtocolDecoder {
         position.setProtocol(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
-        position.setLatitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY));
 
@@ -144,16 +144,16 @@ public class TrakMateProtocolDecoder extends BaseProtocolDecoder {
         position.setDeviceId(deviceSession.getDeviceId());
 
         parser.next(); // seq
-        position.set(Position.KEY_ALARM, decodeAlarm(parser.nextInt()));
+        position.set(Position.KEY_ALARM, decodeAlarm(parser.nextInt(0)));
         parser.next(); // alert status or data
 
-        position.setLatitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY));
 
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
         return position;
     }
@@ -176,27 +176,27 @@ public class TrakMateProtocolDecoder extends BaseProtocolDecoder {
 
         parser.next(); // seq
 
-        position.setLatitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
 
         position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY));
 
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
+        position.set(Position.KEY_IGNITION, parser.nextInt(0) == 1);
         position.set("dop1", parser.next());
         position.set("dop2", parser.next());
         position.set(Position.KEY_INPUT, parser.next());
-        position.set(Position.KEY_BATTERY, parser.nextDouble());
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0));
         position.set(Position.KEY_POWER, parser.next());
-        position.set(Position.KEY_ODOMETER, parser.nextDouble());
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0));
         position.set("pulseOdometer", parser.next());
-        position.set(Position.KEY_STATUS, parser.nextInt());
+        position.set(Position.KEY_STATUS, parser.nextInt(0));
 
-        position.setValid(parser.nextInt() != 0);
+        position.setValid(parser.nextInt(0) != 0);
 
-        position.set(Position.KEY_ARCHIVE, parser.nextInt() == 1);
+        position.set(Position.KEY_ARCHIVE, parser.nextInt(0) == 1);
 
         return position;
     }
diff --git a/src/org/traccar/protocol/TrvProtocolDecoder.java b/src/org/traccar/protocol/TrvProtocolDecoder.java
index f1a8c7427..415828ffd 100644
--- a/src/org/traccar/protocol/TrvProtocolDecoder.java
+++ b/src/org/traccar/protocol/TrvProtocolDecoder.java
@@ -106,13 +106,13 @@ public class TrvProtocolDecoder extends BaseProtocolDecoder {
 
             getLastLocation(position, null);
 
-            position.set(Position.KEY_RSSI, parser.nextInt());
-            position.set(Position.KEY_SATELLITES, parser.nextInt());
-            position.set(Position.KEY_BATTERY, parser.nextInt());
-            position.set(Position.KEY_IGNITION, parser.nextInt() != 0);
+            position.set(Position.KEY_RSSI, parser.nextInt(0));
+            position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+            position.set(Position.KEY_BATTERY, parser.nextInt(0));
+            position.set(Position.KEY_IGNITION, parser.nextInt(0) != 0);
 
-            position.set("arm", parser.nextInt());
-            position.set("mode", parser.nextInt());
+            position.set("arm", parser.nextInt(0));
+            position.set("mode", parser.nextInt(0));
 
             return position;
 
@@ -128,29 +128,29 @@ public class TrvProtocolDecoder extends BaseProtocolDecoder {
             position.setDeviceId(deviceSession.getDeviceId());
 
             DateBuilder dateBuilder = new DateBuilder()
-                    .setDate(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                    .setDate(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(UnitsConverter.knotsFromKph(parser.nextDouble()));
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
 
-            dateBuilder.setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+            dateBuilder.setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
             position.setTime(dateBuilder.getDate());
 
-            position.setCourse(parser.nextDouble());
+            position.setCourse(parser.nextDouble(0));
 
-            int rssi = parser.nextInt();
-            position.set(Position.KEY_SATELLITES, parser.nextInt());
-            position.set(Position.KEY_BATTERY, parser.nextInt());
+            int rssi = parser.nextInt(0);
+            position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+            position.set(Position.KEY_BATTERY, parser.nextInt(0));
 
-            int acc = parser.nextInt();
+            int acc = parser.nextInt(0);
             if (acc != 0) {
                 position.set(Position.KEY_IGNITION, acc == 1);
             }
 
             position.setNetwork(new Network(CellTower.from(
-                    parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextInt(), rssi)));
+                    parser.nextInt(0), parser.nextInt(0), parser.nextInt(0), parser.nextInt(0), rssi)));
 
             return position;
         }
diff --git a/src/org/traccar/protocol/Tt8850ProtocolDecoder.java b/src/org/traccar/protocol/Tt8850ProtocolDecoder.java
index 88895ff1a..5e30d0994 100644
--- a/src/org/traccar/protocol/Tt8850ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Tt8850ProtocolDecoder.java
@@ -79,18 +79,18 @@ public class Tt8850ProtocolDecoder extends BaseProtocolDecoder {
         position.setDeviceId(deviceSession.getDeviceId());
 
         position.setValid(true);
-        position.setAccuracy(parser.nextInt());
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
-        position.setCourse(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
-        position.setLatitude(parser.nextDouble());
+        position.setAccuracy(parser.nextInt(0));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setLatitude(parser.nextDouble(0));
 
         position.setTime(parser.nextDateTime());
 
         if (parser.hasNext(4)) {
             position.setNetwork(new Network(
-                    CellTower.from(parser.nextInt(), parser.nextInt(), parser.nextInt(16), parser.nextInt(16))));
+                    CellTower.from(parser.nextInt(0), parser.nextInt(0), parser.nextHexInt(0), parser.nextHexInt(0))));
         }
 
         return position;
diff --git a/src/org/traccar/protocol/UlbotechProtocolDecoder.java b/src/org/traccar/protocol/UlbotechProtocolDecoder.java
index b5d60431d..1b22eeb75 100644
--- a/src/org/traccar/protocol/UlbotechProtocolDecoder.java
+++ b/src/org/traccar/protocol/UlbotechProtocolDecoder.java
@@ -193,8 +193,8 @@ public class UlbotechProtocolDecoder extends BaseProtocolDecoder {
         position.setDeviceId(deviceSession.getDeviceId());
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt())
-                .setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0))
+                .setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
 
         getLastLocation(position, dateBuilder.getDate());
 
diff --git a/src/org/traccar/protocol/UproProtocolDecoder.java b/src/org/traccar/protocol/UproProtocolDecoder.java
index 44916988e..7a0dca8a2 100644
--- a/src/org/traccar/protocol/UproProtocolDecoder.java
+++ b/src/org/traccar/protocol/UproProtocolDecoder.java
@@ -64,13 +64,13 @@ public class UproProtocolDecoder extends BaseProtocolDecoder {
         if (parser.matches()) {
 
             DateBuilder dateBuilder = new DateBuilder()
-                    .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                    .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
 
             position.setValid(true);
             position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_MIN_MIN));
             position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_MIN_MIN));
 
-            int flags = parser.nextInt();
+            int flags = parser.nextInt(0);
             position.setValid(BitUtil.check(flags, 0));
             if (!BitUtil.check(flags, 1)) {
                 position.setLatitude(-position.getLatitude());
@@ -79,10 +79,10 @@ public class UproProtocolDecoder extends BaseProtocolDecoder {
                 position.setLongitude(-position.getLongitude());
             }
 
-            position.setSpeed(parser.nextInt() * 2);
-            position.setCourse(parser.nextInt() * 10);
+            position.setSpeed(parser.nextInt(0) * 2);
+            position.setCourse(parser.nextInt(0) * 10);
 
-            dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+            dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
             position.setTime(dateBuilder.getDate());
 
         }
diff --git a/src/org/traccar/protocol/V680ProtocolDecoder.java b/src/org/traccar/protocol/V680ProtocolDecoder.java
index caa0e5e23..a7853133b 100644
--- a/src/org/traccar/protocol/V680ProtocolDecoder.java
+++ b/src/org/traccar/protocol/V680ProtocolDecoder.java
@@ -85,15 +85,15 @@ public class V680ProtocolDecoder extends BaseProtocolDecoder {
             position.setDeviceId(deviceSession.getDeviceId());
 
             position.set("user", parser.next());
-            position.setValid(parser.nextInt() > 0);
+            position.setValid(parser.nextInt(0) > 0);
             position.set("password", parser.next());
             position.set(Position.KEY_EVENT, parser.next());
             position.set("packet", parser.next());
             position.set(Position.KEY_RSSI, parser.next());
 
-            double lon = parser.nextDouble();
+            double lon = parser.nextDouble(0);
             boolean west = parser.next().equals("W");
-            double lat = parser.nextDouble();
+            double lat = parser.nextDouble(0);
             boolean south = parser.next().equals("S");
 
             if (lat > 90 || lon > 180) {
@@ -109,18 +109,18 @@ public class V680ProtocolDecoder extends BaseProtocolDecoder {
             position.setLongitude(west ? -lon : lon);
             position.setLatitude(south ? -lat : lat);
 
-            position.setSpeed(parser.nextDouble());
-            position.setCourse(parser.nextDouble());
+            position.setSpeed(parser.nextDouble(0));
+            position.setCourse(parser.nextDouble(0));
 
-            int day = parser.nextInt();
-            int month = parser.nextInt();
+            int day = parser.nextInt(0);
+            int month = parser.nextInt(0);
             if (day == 0 && month == 0) {
                 return null; // invalid date
             }
 
             DateBuilder dateBuilder = new DateBuilder()
-                    .setDate(parser.nextInt(), month, day)
-                    .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                    .setDate(parser.nextInt(0), month, day)
+                    .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
             position.setTime(dateBuilder.getDate());
 
             return position;
diff --git a/src/org/traccar/protocol/VisiontekProtocolDecoder.java b/src/org/traccar/protocol/VisiontekProtocolDecoder.java
index 7abef7386..c430c86d8 100644
--- a/src/org/traccar/protocol/VisiontekProtocolDecoder.java
+++ b/src/org/traccar/protocol/VisiontekProtocolDecoder.java
@@ -104,12 +104,12 @@ public class VisiontekProtocolDecoder extends BaseProtocolDecoder {
         position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(
                 parser.next().replace(".", "")) / 10));
 
-        position.setCourse(parser.nextDouble());
+        position.setCourse(parser.nextDouble(0));
 
         if (parser.hasNext(9)) {
-            position.setAltitude(parser.nextDouble());
+            position.setAltitude(parser.nextDouble(0));
             position.set(Position.KEY_SATELLITES, parser.next());
-            position.set(Position.KEY_ODOMETER, parser.nextInt() * 1000);
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0) * 1000);
             position.set(Position.KEY_IGNITION, parser.next().equals("1"));
             position.set(Position.PREFIX_IO + 1, parser.next());
             position.set(Position.PREFIX_IO + 2, parser.next());
@@ -120,8 +120,8 @@ public class VisiontekProtocolDecoder extends BaseProtocolDecoder {
 
         if (parser.hasNext(7)) {
             position.set(Position.KEY_HDOP, parser.next());
-            position.setAltitude(parser.nextDouble());
-            position.set(Position.KEY_ODOMETER, parser.nextInt() * 1000);
+            position.setAltitude(parser.nextDouble(0));
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0) * 1000);
             position.set(Position.KEY_INPUT, parser.next());
             position.set(Position.KEY_OUTPUT, parser.next());
             position.set(Position.PREFIX_ADC + 1, parser.next());
diff --git a/src/org/traccar/protocol/WatchProtocolDecoder.java b/src/org/traccar/protocol/WatchProtocolDecoder.java
index d95f8c714..9d64776c3 100644
--- a/src/org/traccar/protocol/WatchProtocolDecoder.java
+++ b/src/org/traccar/protocol/WatchProtocolDecoder.java
@@ -186,17 +186,17 @@ public class WatchProtocolDecoder extends BaseProtocolDecoder {
             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()));
-            position.setCourse(parser.nextDouble());
-            position.setAltitude(parser.nextDouble());
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+            position.setCourse(parser.nextDouble(0));
+            position.setAltitude(parser.nextDouble(0));
 
-            position.set(Position.KEY_SATELLITES, parser.nextInt());
-            position.set(Position.KEY_RSSI, parser.nextInt());
-            position.set(Position.KEY_BATTERY, parser.nextInt());
+            position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+            position.set(Position.KEY_RSSI, parser.nextInt(0));
+            position.set(Position.KEY_BATTERY, parser.nextInt(0));
 
-            position.set("steps", parser.nextInt());
+            position.set("steps", parser.nextInt(0));
 
-            position.set(Position.KEY_ALARM, decodeAlarm(parser.nextInt(16)));
+            position.set(Position.KEY_ALARM, decodeAlarm(parser.nextHexInt(0)));
 
             decodeTail(position, parser.next());
 
diff --git a/src/org/traccar/protocol/WialonProtocolDecoder.java b/src/org/traccar/protocol/WialonProtocolDecoder.java
index c5b8890f3..c1a125601 100644
--- a/src/org/traccar/protocol/WialonProtocolDecoder.java
+++ b/src/org/traccar/protocol/WialonProtocolDecoder.java
@@ -88,12 +88,12 @@ public class WialonProtocolDecoder extends BaseProtocolDecoder {
 
         position.setLatitude(parser.nextCoordinate());
         position.setLongitude(parser.nextCoordinate());
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
-        position.setCourse(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
 
         if (parser.hasNext()) {
-            int satellites = parser.nextInt();
+            int satellites = parser.nextInt(0);
             position.setValid(satellites >= 3);
             position.set(Position.KEY_SATELLITES, satellites);
         }
diff --git a/src/org/traccar/protocol/WondexProtocolDecoder.java b/src/org/traccar/protocol/WondexProtocolDecoder.java
index fff4e9103..b1b06a5da 100644
--- a/src/org/traccar/protocol/WondexProtocolDecoder.java
+++ b/src/org/traccar/protocol/WondexProtocolDecoder.java
@@ -99,20 +99,20 @@ public class WondexProtocolDecoder extends BaseProtocolDecoder {
 
             position.setTime(parser.nextDateTime());
 
-            position.setLongitude(parser.nextDouble());
-            position.setLatitude(parser.nextDouble());
-            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
-            position.setCourse(parser.nextDouble());
-            position.setAltitude(parser.nextDouble());
+            position.setLongitude(parser.nextDouble(0));
+            position.setLatitude(parser.nextDouble(0));
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+            position.setCourse(parser.nextDouble(0));
+            position.setAltitude(parser.nextDouble(0));
 
-            int satellites = parser.nextInt();
+            int satellites = parser.nextInt(0);
             position.setValid(satellites >= 3);
             position.set(Position.KEY_SATELLITES, satellites);
 
             position.set(Position.KEY_EVENT, parser.next());
             position.set(Position.KEY_BATTERY, parser.next());
             if (parser.hasNext()) {
-                position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+                position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
             }
             position.set(Position.KEY_INPUT, parser.next());
             position.set(Position.PREFIX_ADC + 1, parser.next());
diff --git a/src/org/traccar/protocol/XexunProtocolDecoder.java b/src/org/traccar/protocol/XexunProtocolDecoder.java
index f60b3e693..4d44c2326 100644
--- a/src/org/traccar/protocol/XexunProtocolDecoder.java
+++ b/src/org/traccar/protocol/XexunProtocolDecoder.java
@@ -104,15 +104,15 @@ public class XexunProtocolDecoder extends BaseProtocolDecoder {
         }
 
         DateBuilder dateBuilder = new DateBuilder()
-                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                .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());
-        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
         position.setTime(dateBuilder.getDate());
 
         position.set("signal", parser.next());
@@ -127,9 +127,9 @@ public class XexunProtocolDecoder extends BaseProtocolDecoder {
         if (full) {
             position.set(Position.KEY_SATELLITES, parser.next().replaceFirst("^0*(?![\\.$])", ""));
 
-            position.setAltitude(parser.nextDouble());
+            position.setAltitude(parser.nextDouble(0));
 
-            position.set(Position.KEY_POWER, parser.nextDouble());
+            position.set(Position.KEY_POWER, parser.nextDouble(0));
         }
 
         return position;
diff --git a/src/org/traccar/protocol/XirgoProtocolDecoder.java b/src/org/traccar/protocol/XirgoProtocolDecoder.java
index cc97a77f9..c6d4b6978 100644
--- a/src/org/traccar/protocol/XirgoProtocolDecoder.java
+++ b/src/org/traccar/protocol/XirgoProtocolDecoder.java
@@ -121,17 +121,17 @@ public class XirgoProtocolDecoder extends BaseProtocolDecoder {
 
         position.setTime(parser.nextDateTime());
 
-        position.setLatitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
-        position.setSpeed(UnitsConverter.knotsFromMph(parser.nextDouble()));
-        position.setCourse(parser.nextDouble());
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromMph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
 
         position.set(Position.KEY_SATELLITES, parser.next());
         position.set(Position.KEY_HDOP, parser.next());
 
         if (newFormat) {
-            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1609.34);
+            position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1609.34);
             position.set(Position.KEY_FUEL_CONSUMPTION, parser.next());
         }
 
@@ -139,10 +139,10 @@ public class XirgoProtocolDecoder extends BaseProtocolDecoder {
         position.set(Position.KEY_RSSI, parser.next());
 
         if (!newFormat) {
-            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1609.34);
+            position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1609.34);
         }
 
-        position.setValid(parser.nextInt() == 1);
+        position.setValid(parser.nextInt(0) == 1);
 
         return position;
     }
diff --git a/src/org/traccar/protocol/Xt013ProtocolDecoder.java b/src/org/traccar/protocol/Xt013ProtocolDecoder.java
index 93e26e986..a18758b81 100644
--- a/src/org/traccar/protocol/Xt013ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Xt013ProtocolDecoder.java
@@ -76,11 +76,11 @@ public class Xt013ProtocolDecoder extends BaseProtocolDecoder {
 
         position.setTime(parser.nextDateTime());
 
-        position.setLatitude(parser.nextDouble());
-        position.setLongitude(parser.nextDouble());
-        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
-        position.setCourse(parser.nextDouble());
-        position.setAltitude(parser.nextDouble());
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
         position.setValid(parser.next().equals("F"));
 
         position.set(Position.KEY_GPS, parser.next());
diff --git a/src/org/traccar/protocol/YwtProtocolDecoder.java b/src/org/traccar/protocol/YwtProtocolDecoder.java
index d79ae4439..6a98ab9e7 100644
--- a/src/org/traccar/protocol/YwtProtocolDecoder.java
+++ b/src/org/traccar/protocol/YwtProtocolDecoder.java
@@ -91,11 +91,11 @@ public class YwtProtocolDecoder extends BaseProtocolDecoder {
 
         position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
         position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
-        position.setAltitude(parser.nextDouble());
-        position.setSpeed(parser.nextDouble());
-        position.setCourse(parser.nextDouble());
+        position.setAltitude(parser.nextDouble(0));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
 
-        int satellites = parser.nextInt();
+        int satellites = parser.nextInt(0);
         position.setValid(satellites >= 3);
         position.set(Position.KEY_SATELLITES, satellites);