Create prefixes for other data

26 files changed, 81 insertions, 79 deletions

diff --git a/src/org/traccar/model/Event.java b/src/org/traccar/model/Event.java
index 5523174b4..76ac67a11 100644
--- a/src/org/traccar/model/Event.java
+++ b/src/org/traccar/model/Event.java
@@ -64,11 +64,16 @@ public abstract class Event {
     public static final String KEY_OUTPUT = "output";
     public static final String KEY_POWER = "power";
     public static final String KEY_BATTERY = "battery";
-    public static final String KEY_TEMPERATURE = "temperature";
     public static final String KEY_MCC = "mcc";
     public static final String KEY_MNC = "mnc";
     public static final String KEY_LAC = "lac";
     public static final String KEY_CELL = "cell";
     public static final String KEY_FUEL = "fuel";
 
+    // Starts with 1 not 0
+    public static final String PREFIX_TEMP = "temp";
+    public static final String PREFIX_ADC = "adc";
+    public static final String PREFIX_IO = "io";
+    public static final String PREFIX_COUNT = "count";
+
 }
diff --git a/src/org/traccar/protocol/ApelProtocolDecoder.java b/src/org/traccar/protocol/ApelProtocolDecoder.java
index b814f60e3..6b4e43dbd 100644
--- a/src/org/traccar/protocol/ApelProtocolDecoder.java
+++ b/src/org/traccar/protocol/ApelProtocolDecoder.java
@@ -227,13 +227,13 @@ public class ApelProtocolDecoder extends BaseProtocolDecoder {
                     
                     // Analog sensors
                     for (int i = 1; i <= 8; i++) {
-                        position.set("adc" + i, buf.readUnsignedShort());
+                        position.set(Event.PREFIX_ADC + i, buf.readUnsignedShort());
                     }
                     
                     // Counters
-                    position.set("c0", buf.readUnsignedInt());
-                    position.set("c1", buf.readUnsignedInt());
-                    position.set("c2", buf.readUnsignedInt());
+                    position.set(Event.PREFIX_COUNT + 1, buf.readUnsignedInt());
+                    position.set(Event.PREFIX_COUNT + 2, buf.readUnsignedInt());
+                    position.set(Event.PREFIX_COUNT + 3, buf.readUnsignedInt());
                 }
 
                 positions.add(position);
diff --git a/src/org/traccar/protocol/AplicomProtocolDecoder.java b/src/org/traccar/protocol/AplicomProtocolDecoder.java
index 7170731f5..824c2af26 100644
--- a/src/org/traccar/protocol/AplicomProtocolDecoder.java
+++ b/src/org/traccar/protocol/AplicomProtocolDecoder.java
@@ -176,10 +176,10 @@ public class AplicomProtocolDecoder extends BaseProtocolDecoder {
         
         // ADC
         if ((selector & 0x0020) != 0) {
-            position.set("adc1", buf.readUnsignedShort());
-            position.set("adc2", buf.readUnsignedShort());
-            position.set("adc3", buf.readUnsignedShort());
-            position.set("adc4", buf.readUnsignedShort());
+            position.set(Event.PREFIX_ADC + 1, buf.readUnsignedShort());
+            position.set(Event.PREFIX_ADC + 2, buf.readUnsignedShort());
+            position.set(Event.PREFIX_ADC + 3, buf.readUnsignedShort());
+            position.set(Event.PREFIX_ADC + 4, buf.readUnsignedShort());
         }
 
         // Power
@@ -311,7 +311,7 @@ public class AplicomProtocolDecoder extends BaseProtocolDecoder {
                         position.set("air-temperature", ChannelBuffers.swapShort(value.readShort()) * 0.1);
                         break;
                     case 0x30D:
-                        position.set("alarms", ChannelBufferTools.readHexString(value, 16));
+                        position.set(Event.KEY_ALARM, ChannelBufferTools.readHexString(value, 16));
                         break;
                     case 0x40D:
                         position.set("cold-unit-status", ChannelBufferTools.readHexString(value, 16));
diff --git a/src/org/traccar/protocol/Ardi01ProtocolDecoder.java b/src/org/traccar/protocol/Ardi01ProtocolDecoder.java
index 6797eb01e..fdd160bdd 100644
--- a/src/org/traccar/protocol/Ardi01ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Ardi01ProtocolDecoder.java
@@ -100,7 +100,7 @@ public class Ardi01ProtocolDecoder extends BaseProtocolDecoder {
         position.set(Event.KEY_BATTERY, parser.group(index++));
 
         // Output
-        position.set(Event.KEY_TEMPERATURE, parser.group(index++));
+        position.set(Event.PREFIX_TEMP + 1, parser.group(index++));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/AtrackProtocolDecoder.java b/src/org/traccar/protocol/AtrackProtocolDecoder.java
index 5ccd8ed30..b9cc60de4 100644
--- a/src/org/traccar/protocol/AtrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/AtrackProtocolDecoder.java
@@ -137,14 +137,14 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
             position.set(Event.KEY_OUTPUT, buf.readUnsignedByte());
 
             // ADC
-            position.set("adc", buf.readUnsignedShort() * 0.001);
+            position.set(Event.PREFIX_ADC + 1, buf.readUnsignedShort() * 0.001);
 
             // Driver
             position.set("driver", readString(buf));
 
             // Temperature
-            position.set("temperature1", buf.readShort() * 0.1);
-            position.set("temperature2", buf.readShort() * 0.1);
+            position.set(Event.PREFIX_TEMP + 1, buf.readShort() * 0.1);
+            position.set(Event.PREFIX_TEMP + 2, buf.readShort() * 0.1);
 
             // Text Message
             position.set("message", readString(buf));
diff --git a/src/org/traccar/protocol/AutoFon45ProtocolDecoder.java b/src/org/traccar/protocol/AutoFon45ProtocolDecoder.java
index 1a2ebdf4a..55b4ad9dc 100644
--- a/src/org/traccar/protocol/AutoFon45ProtocolDecoder.java
+++ b/src/org/traccar/protocol/AutoFon45ProtocolDecoder.java
@@ -76,7 +76,7 @@ public class AutoFon45ProtocolDecoder extends BaseProtocolDecoder {
 
             buf.skipBytes(2); // remaining time
 
-            position.set(Event.KEY_TEMPERATURE, buf.readByte());
+            position.set(Event.PREFIX_TEMP + 1, buf.readByte());
 
             buf.skipBytes(2); // timer (interval and units)
             buf.readByte(); // mode
diff --git a/src/org/traccar/protocol/AutoFonProtocolDecoder.java b/src/org/traccar/protocol/AutoFonProtocolDecoder.java
index 856b19bc8..04cd4da72 100644
--- a/src/org/traccar/protocol/AutoFonProtocolDecoder.java
+++ b/src/org/traccar/protocol/AutoFonProtocolDecoder.java
@@ -69,7 +69,7 @@ public class AutoFonProtocolDecoder extends BaseProtocolDecoder {
             }
         }
 
-        position.set(Event.KEY_TEMPERATURE, buf.readByte());
+        position.set(Event.PREFIX_TEMP + 1, buf.readByte());
         position.set(Event.KEY_GSM, buf.readUnsignedByte());
         buf.readUnsignedShort(); // mcc
         buf.readUnsignedShort(); // mnc
diff --git a/src/org/traccar/protocol/BceProtocolDecoder.java b/src/org/traccar/protocol/BceProtocolDecoder.java
index 5baafd9dd..8f338b8c9 100644
--- a/src/org/traccar/protocol/BceProtocolDecoder.java
+++ b/src/org/traccar/protocol/BceProtocolDecoder.java
@@ -113,7 +113,7 @@ public class BceProtocolDecoder extends BaseProtocolDecoder {
 
                     for (int i = 1; i <= 8; i++) {
                         if (checkBit(mask, i + 1)) {
-                            position.set("adc" + i, buf.readUnsignedShort());
+                            position.set(Event.PREFIX_ADC + i, buf.readUnsignedShort());
                         }
                     }
 
diff --git a/src/org/traccar/protocol/CarTrackProtocolDecoder.java b/src/org/traccar/protocol/CarTrackProtocolDecoder.java
index 06f1e5342..223023a31 100644
--- a/src/org/traccar/protocol/CarTrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/CarTrackProtocolDecoder.java
@@ -124,7 +124,7 @@ public class CarTrackProtocolDecoder extends BaseProtocolDecoder {
         position.setTime(time.getTime());
         
         // State
-        position.set("io", parser.group(index++));
+        position.set(Event.PREFIX_IO + 1, parser.group(index++));
 
         // Odometer
         String odometer = parser.group(index++);
diff --git a/src/org/traccar/protocol/Gps103ProtocolDecoder.java b/src/org/traccar/protocol/Gps103ProtocolDecoder.java
index f842441a5..f6b763d15 100644
--- a/src/org/traccar/protocol/Gps103ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gps103ProtocolDecoder.java
@@ -190,10 +190,10 @@ public class Gps103ProtocolDecoder extends BaseProtocolDecoder {
         }
 
         // Additional data
-        position.set("io1", parser.group(index++));
-        position.set("io2", parser.group(index++));
-        position.set("io3", parser.group(index++));
-        position.set("io4", parser.group(index++));
+        position.set(Event.PREFIX_IO + 1, parser.group(index++));
+        position.set(Event.PREFIX_IO + 2, parser.group(index++));
+        position.set(Event.PREFIX_IO + 3, parser.group(index++));
+        position.set(Event.PREFIX_IO + 4, parser.group(index++));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/IntellitracProtocolDecoder.java b/src/org/traccar/protocol/IntellitracProtocolDecoder.java
index e1fe91d49..469701b24 100644
--- a/src/org/traccar/protocol/IntellitracProtocolDecoder.java
+++ b/src/org/traccar/protocol/IntellitracProtocolDecoder.java
@@ -117,11 +117,9 @@ public class IntellitracProtocolDecoder extends BaseProtocolDecoder {
         // Output
         position.set(Event.KEY_OUTPUT, parser.group(index++));
 
-        // ADC1
-        position.set("adc1", parser.group(index++));
-
-        // ADC2
-        position.set("adc2", parser.group(index++));
+        // ADC
+        position.set(Event.PREFIX_ADC + 1, parser.group(index++));
+        position.set(Event.PREFIX_ADC + 2, parser.group(index++));
 
         // J1939 data
         position.set("vss", parser.group(index++));
@@ -129,7 +127,7 @@ public class IntellitracProtocolDecoder extends BaseProtocolDecoder {
         position.set("coolant", parser.group(index++));
         position.set(Event.KEY_FUEL, parser.group(index++));
         position.set("consumption", parser.group(index++));
-        position.set(Event.KEY_TEMPERATURE, parser.group(index++));
+        position.set(Event.PREFIX_TEMP + 1, parser.group(index++));
         position.set("charger", parser.group(index++));
         position.set("tpl", parser.group(index++));
         position.set("axle", parser.group(index++));
diff --git a/src/org/traccar/protocol/MegastekProtocolDecoder.java b/src/org/traccar/protocol/MegastekProtocolDecoder.java
index 84bd33be8..054573c33 100644
--- a/src/org/traccar/protocol/MegastekProtocolDecoder.java
+++ b/src/org/traccar/protocol/MegastekProtocolDecoder.java
@@ -247,9 +247,9 @@ public class MegastekProtocolDecoder extends BaseProtocolDecoder {
             position.set("flags", parser.group(index++));
             position.set(Event.KEY_INPUT, parser.group(index++));
             position.set(Event.KEY_OUTPUT, parser.group(index++));
-            position.set("adc1", parser.group(index++));
-            position.set("adc2", parser.group(index++));
-            position.set("adc3", parser.group(index++));
+            position.set(Event.PREFIX_ADC + 1, parser.group(index++));
+            position.set(Event.PREFIX_ADC + 2, parser.group(index++));
+            position.set(Event.PREFIX_ADC + 3, parser.group(index++));
             position.set(Event.KEY_ALARM, parser.group(index++));
             
         }
diff --git a/src/org/traccar/protocol/MeiligaoProtocolDecoder.java b/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
index c58538445..6b40ba912 100644
--- a/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
+++ b/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
@@ -256,7 +256,7 @@ public class MeiligaoProtocolDecoder extends BaseProtocolDecoder {
         for (int i = 1; i <= 8; i++) {
             String adc = parser.group(index++);
             if (adc != null) {
-                position.set("adc" + i, Integer.parseInt(adc, 16));
+                position.set(Event.PREFIX_ADC + i, Integer.parseInt(adc, 16));
             }
         }
 
diff --git a/src/org/traccar/protocol/MeitrackProtocolDecoder.java b/src/org/traccar/protocol/MeitrackProtocolDecoder.java
index 8828bfd23..f9dfcd1f2 100644
--- a/src/org/traccar/protocol/MeitrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/MeitrackProtocolDecoder.java
@@ -142,15 +142,15 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
         // ADC
         String adc1 = parser.group(index++);
         if (adc1 != null) {
-            position.set("adc1", Integer.parseInt(adc1, 16));
+            position.set(Event.PREFIX_ADC + 1, Integer.parseInt(adc1, 16));
         }
         String adc2 = parser.group(index++);
         if (adc2 != null) {
-            position.set("adc2", Integer.parseInt(adc2, 16));
+            position.set(Event.PREFIX_ADC + 2, Integer.parseInt(adc2, 16));
         }
         String adc3 = parser.group(index++);
         if (adc3 != null) {
-            position.set("adc3", Integer.parseInt(adc3, 16));
+            position.set(Event.PREFIX_ADC + 3, Integer.parseInt(adc3, 16));
         }
         position.set(Event.KEY_BATTERY, Integer.parseInt(parser.group(index++), 16));
         position.set(Event.KEY_POWER, Integer.parseInt(parser.group(index++), 16));
@@ -235,7 +235,7 @@ public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
             position.set("state", buf.readUnsignedShort());
         
             // ADC
-            position.set("adc1", buf.readUnsignedShort());
+            position.set(Event.PREFIX_ADC + 1, buf.readUnsignedShort());
             position.set(Event.KEY_BATTERY, buf.readUnsignedShort() * 0.01);
             position.set(Event.KEY_POWER, buf.readUnsignedShort());
             
diff --git a/src/org/traccar/protocol/Mta6ProtocolDecoder.java b/src/org/traccar/protocol/Mta6ProtocolDecoder.java
index c5bf2827b..3d977706f 100644
--- a/src/org/traccar/protocol/Mta6ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Mta6ProtocolDecoder.java
@@ -167,21 +167,21 @@ public class Mta6ProtocolDecoder extends BaseProtocolDecoder {
                 }
 
                 if (checkBit(flags, 4)) {
-                    position.set("fuel1", buf.readUnsignedInt());
+                    position.set(Event.KEY_FUEL, buf.readUnsignedInt());
                     position.set("fuel2", buf.readUnsignedInt());
                     position.set("hours1", buf.readUnsignedShort());
                     position.set("hours2", buf.readUnsignedShort());
                 }
 
                 if (checkBit(flags, 5)) {
-                    position.set("adc1", buf.readUnsignedShort() & 0x03ff);
-                    position.set("adc2", buf.readUnsignedShort() & 0x03ff);
-                    position.set("adc3", buf.readUnsignedShort() & 0x03ff);
-                    position.set("adc4", buf.readUnsignedShort() & 0x03ff);
+                    position.set(Event.PREFIX_ADC + 1, buf.readUnsignedShort() & 0x03ff);
+                    position.set(Event.PREFIX_ADC + 2, buf.readUnsignedShort() & 0x03ff);
+                    position.set(Event.PREFIX_ADC + 3, buf.readUnsignedShort() & 0x03ff);
+                    position.set(Event.PREFIX_ADC + 4, buf.readUnsignedShort() & 0x03ff);
                 }
 
                 if (checkBit(flags, 6)) {
-                    position.set(Event.KEY_TEMPERATURE, buf.readByte());
+                    position.set(Event.PREFIX_TEMP + 1, buf.readByte());
                     buf.getUnsignedByte(buf.readerIndex()); // control (>> 4)
                     position.set("sensor", buf.readUnsignedShort() & 0x0fff);
                     buf.readUnsignedShort(); // old sensor state (& 0x0fff)
@@ -247,19 +247,19 @@ public class Mta6ProtocolDecoder extends BaseProtocolDecoder {
         if (checkBit(flags, 2)) {
             position.set("engine", buf.readUnsignedShort() * 0.125);
             position.set("pedals", buf.readUnsignedByte());
-            position.set(Event.KEY_TEMPERATURE, buf.readUnsignedByte() - 40);
+            position.set(Event.PREFIX_TEMP + 1, buf.readUnsignedByte() - 40);
             buf.readUnsignedShort(); // service odometer
         }
 
         if (checkBit(flags, 3)) {
             position.set(Event.KEY_FUEL, buf.readUnsignedShort());
-            position.set("adc2", buf.readUnsignedShort());
-            position.set("adc3", buf.readUnsignedShort());
-            position.set("adc4", buf.readUnsignedShort());
+            position.set(Event.PREFIX_ADC + 2, buf.readUnsignedShort());
+            position.set(Event.PREFIX_ADC + 3, buf.readUnsignedShort());
+            position.set(Event.PREFIX_ADC + 4, buf.readUnsignedShort());
         }
 
         if (checkBit(flags, 4)) {
-            position.set(Event.KEY_TEMPERATURE, buf.readByte());
+            position.set(Event.PREFIX_TEMP + 1, buf.readByte());
             buf.getUnsignedByte(buf.readerIndex()); // control (>> 4)
             position.set("sensor", buf.readUnsignedShort() & 0x0fff);
             buf.readUnsignedShort(); // old sensor state (& 0x0fff)
diff --git a/src/org/traccar/protocol/MtxProtocolDecoder.java b/src/org/traccar/protocol/MtxProtocolDecoder.java
index 1d32e83f6..0151e9a8c 100644
--- a/src/org/traccar/protocol/MtxProtocolDecoder.java
+++ b/src/org/traccar/protocol/MtxProtocolDecoder.java
@@ -103,8 +103,8 @@ public class MtxProtocolDecoder extends BaseProtocolDecoder {
         position.set(Event.KEY_ODOMETER, Double.valueOf(parser.group(index++)));
         position.set(Event.KEY_INPUT, parser.group(index++));
         position.set(Event.KEY_OUTPUT, parser.group(index++));
-        position.set("adc1", parser.group(index++));
-        position.set("adc2", parser.group(index++));
+        position.set(Event.PREFIX_ADC + 1, parser.group(index++));
+        position.set(Event.PREFIX_ADC + 2, parser.group(index++));
 
         return position;
     }
diff --git a/src/org/traccar/protocol/NavisProtocolDecoder.java b/src/org/traccar/protocol/NavisProtocolDecoder.java
index 8b142ce2e..125559aab 100644
--- a/src/org/traccar/protocol/NavisProtocolDecoder.java
+++ b/src/org/traccar/protocol/NavisProtocolDecoder.java
@@ -140,12 +140,12 @@ public class NavisProtocolDecoder extends BaseProtocolDecoder {
 
         // Temperature
         if (isFormat(format, F10, F20, F30)) {
-            position.set(Event.KEY_TEMPERATURE, buf.readShort());
+            position.set(Event.PREFIX_TEMP + 1, buf.readShort());
         }
 
         if (isFormat(format, F10, F20, F50, F52)) {
-            position.set("adc1", buf.readUnsignedShort());
-            position.set("adc2", buf.readUnsignedShort());
+            position.set(Event.PREFIX_ADC + 1, buf.readUnsignedShort());
+            position.set(Event.PREFIX_ADC + 2, buf.readUnsignedShort());
         }
 
         if (isFormat(format, F20, F50, F51, F52)) {
diff --git a/src/org/traccar/protocol/NoranProtocolDecoder.java b/src/org/traccar/protocol/NoranProtocolDecoder.java
index e43f47999..ff35a287a 100644
--- a/src/org/traccar/protocol/NoranProtocolDecoder.java
+++ b/src/org/traccar/protocol/NoranProtocolDecoder.java
@@ -113,7 +113,7 @@ public class NoranProtocolDecoder extends BaseProtocolDecoder {
             position.setDeviceId(getDeviceId());
 
             // IO status
-            position.set("io", buf.readUnsignedByte());
+            position.set(Event.PREFIX_IO + 1, buf.readUnsignedByte());
             
             // Fuel
             position.set(Event.KEY_FUEL, buf.readUnsignedByte());
diff --git a/src/org/traccar/protocol/ProgressProtocolDecoder.java b/src/org/traccar/protocol/ProgressProtocolDecoder.java
index a4231448f..f2bf41398 100644
--- a/src/org/traccar/protocol/ProgressProtocolDecoder.java
+++ b/src/org/traccar/protocol/ProgressProtocolDecoder.java
@@ -175,9 +175,8 @@ public class ProgressProtocolDecoder extends BaseProtocolDecoder {
                 if ((extraFlags & 0x1) == 0x1) {
                     int count = buf.readUnsignedShort();
                     for (int i = 1; i <= count; i++) {
-                        position.set("adc" + i, buf.readUnsignedShort());
+                        position.set(Event.PREFIX_ADC + i, buf.readUnsignedShort());
                     }
-
                 }
 
                 // CAN adapter
diff --git a/src/org/traccar/protocol/RuptelaProtocolDecoder.java b/src/org/traccar/protocol/RuptelaProtocolDecoder.java
index 0cca3de26..d14fc6d15 100644
--- a/src/org/traccar/protocol/RuptelaProtocolDecoder.java
+++ b/src/org/traccar/protocol/RuptelaProtocolDecoder.java
@@ -89,25 +89,25 @@ public class RuptelaProtocolDecoder extends BaseProtocolDecoder {
                 // Read 1 byte data
                 int cnt = buf.readUnsignedByte();
                 for (int j = 0; j < cnt; j++) {
-                    position.set("io" + buf.readUnsignedByte(), buf.readUnsignedByte());
+                    position.set(Event.PREFIX_IO + buf.readUnsignedByte(), buf.readUnsignedByte());
                 }
 
                 // Read 2 byte data
                 cnt = buf.readUnsignedByte();
                 for (int j = 0; j < cnt; j++) {
-                    position.set("io" + buf.readUnsignedByte(), buf.readUnsignedShort());
+                    position.set(Event.PREFIX_IO + buf.readUnsignedByte(), buf.readUnsignedShort());
                 }
 
                 // Read 4 byte data
                 cnt = buf.readUnsignedByte();
                 for (int j = 0; j < cnt; j++) {
-                    position.set("io" + buf.readUnsignedByte(), buf.readUnsignedInt());
+                    position.set(Event.PREFIX_IO + buf.readUnsignedByte(), buf.readUnsignedInt());
                 }
 
                 // Read 8 byte data
                 cnt = buf.readUnsignedByte();
                 for (int j = 0; j < cnt; j++) {
-                    position.set("io" + buf.readUnsignedByte(), buf.readLong());
+                    position.set(Event.PREFIX_IO + buf.readUnsignedByte(), buf.readLong());
                 }
                 positions.add(position);
             }
diff --git a/src/org/traccar/protocol/TeltonikaProtocolDecoder.java b/src/org/traccar/protocol/TeltonikaProtocolDecoder.java
index 85d1b939d..d2f77549c 100644
--- a/src/org/traccar/protocol/TeltonikaProtocolDecoder.java
+++ b/src/org/traccar/protocol/TeltonikaProtocolDecoder.java
@@ -160,7 +160,7 @@ public class TeltonikaProtocolDecoder extends BaseProtocolDecoder {
                     if (id == 1) {
                         position.set(Event.KEY_POWER, buf.readUnsignedByte());
                     } else {
-                        position.set("io" + id, buf.readUnsignedByte());
+                        position.set(Event.PREFIX_IO + id, buf.readUnsignedByte());
                     }
                 }
             }
@@ -170,7 +170,7 @@ public class TeltonikaProtocolDecoder extends BaseProtocolDecoder {
             if (checkBit(globalMask, 2)) {
                 int cnt = buf.readUnsignedByte();
                 for (int j = 0; j < cnt; j++) {
-                    position.set("io" + buf.readUnsignedByte(), buf.readUnsignedShort());
+                    position.set(Event.PREFIX_IO + buf.readUnsignedByte(), buf.readUnsignedShort());
                 }
             }
 
@@ -178,7 +178,7 @@ public class TeltonikaProtocolDecoder extends BaseProtocolDecoder {
             if (checkBit(globalMask, 3)) {
                 int cnt = buf.readUnsignedByte();
                 for (int j = 0; j < cnt; j++) {
-                    position.set("io" + buf.readUnsignedByte(), buf.readUnsignedInt());
+                    position.set(Event.PREFIX_IO + buf.readUnsignedByte(), buf.readUnsignedInt());
                 }
             }
 
@@ -186,7 +186,7 @@ public class TeltonikaProtocolDecoder extends BaseProtocolDecoder {
             if (codec == CODEC_FM4X00) {
                 int cnt = buf.readUnsignedByte();
                 for (int j = 0; j < cnt; j++) {
-                    position.set("io" + buf.readUnsignedByte(), buf.readLong());
+                    position.set(Event.PREFIX_IO + buf.readUnsignedByte(), buf.readLong());
                 }
             }
             positions.add(position);
diff --git a/src/org/traccar/protocol/TotemProtocolDecoder.java b/src/org/traccar/protocol/TotemProtocolDecoder.java
index fe39a6344..cf4eaf9af 100644
--- a/src/org/traccar/protocol/TotemProtocolDecoder.java
+++ b/src/org/traccar/protocol/TotemProtocolDecoder.java
@@ -231,20 +231,20 @@ public class TotemProtocolDecoder extends BaseProtocolDecoder {
             position.set(Event.KEY_HDOP, parser.group(index++));
 
             // IO Status
-            position.set("io", parser.group(index++));
+            position.set(Event.PREFIX_IO + 1, parser.group(index++));
 
             // Power
             position.set(Event.KEY_BATTERY, parser.group(index++));
             position.set(Event.KEY_POWER, Double.valueOf(parser.group(index++)));
 
             // ADC
-            position.set("adc", parser.group(index++));
+            position.set(Event.PREFIX_ADC + 1, parser.group(index++));
 
             // Location Code
             position.set(Event.KEY_LAC, parser.group(index++));
 
             // Temperature
-            position.set(Event.KEY_TEMPERATURE, parser.group(index++));
+            position.set(Event.PREFIX_TEMP + 1, parser.group(index++));
 
             // Odometer
             position.set(Event.KEY_ODOMETER, parser.group(index++));
@@ -263,19 +263,19 @@ public class TotemProtocolDecoder extends BaseProtocolDecoder {
             position.setTime(time.getTime());
             
             // IO Status
-            position.set("io", parser.group(index++));
+            position.set(Event.PREFIX_IO + 1, parser.group(index++));
 
             // Power
             position.set(Event.KEY_BATTERY, Double.valueOf(parser.group(index++)) / 10);
             position.set(Event.KEY_POWER, Double.valueOf(parser.group(index++)));
 
             // ADC
-            position.set("adc1", parser.group(index++));
-            position.set("adc2", parser.group(index++));
+            position.set(Event.PREFIX_ADC + 1, parser.group(index++));
+            position.set(Event.PREFIX_ADC + 2, parser.group(index++));
 
             // Temperature
-            position.set("temperature1", parser.group(index++));
-            position.set("temperature2", parser.group(index++));
+            position.set(Event.PREFIX_TEMP + 1, parser.group(index++));
+            position.set(Event.PREFIX_TEMP + 2, parser.group(index++));
 
             // Location Code
             position.set(Event.KEY_LAC, parser.group(index++));
diff --git a/src/org/traccar/protocol/Tr900ProtocolDecoder.java b/src/org/traccar/protocol/Tr900ProtocolDecoder.java
index 67783049d..8839f230b 100644
--- a/src/org/traccar/protocol/Tr900ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Tr900ProtocolDecoder.java
@@ -115,7 +115,7 @@ public class Tr900ProtocolDecoder extends BaseProtocolDecoder {
         // Other
         position.set(Event.KEY_GSM, parser.group(index++));
         position.set(Event.KEY_EVENT, Integer.valueOf(parser.group(index++)));
-        position.set("adc1", Integer.valueOf(parser.group(index++)));
+        position.set(Event.PREFIX_ADC + 1, Integer.valueOf(parser.group(index++)));
         position.set(Event.KEY_BATTERY, Integer.valueOf(parser.group(index++)));
         position.set(Event.KEY_INPUT, parser.group(index++));
         position.set(Event.KEY_STATUS, parser.group(index++));
diff --git a/src/org/traccar/protocol/TytanProtocolDecoder.java b/src/org/traccar/protocol/TytanProtocolDecoder.java
index 6b08c3762..390f0b596 100644
--- a/src/org/traccar/protocol/TytanProtocolDecoder.java
+++ b/src/org/traccar/protocol/TytanProtocolDecoder.java
@@ -108,7 +108,7 @@ public class TytanProtocolDecoder extends BaseProtocolDecoder {
                         break;
                     case 6:
                         buf.readUnsignedShort();
-                        position.set("adc", buf.readFloat());
+                        position.set(Event.PREFIX_ADC + 1, buf.readFloat());
                         break;
                     case 7:
                         position.set(Event.KEY_ALARM, buf.readUnsignedShort());
@@ -124,7 +124,7 @@ public class TytanProtocolDecoder extends BaseProtocolDecoder {
                         break;
                     case 24:
                         buf.readUnsignedByte();
-                        position.set(Event.KEY_TEMPERATURE, buf.readUnsignedByte());
+                        position.set(Event.PREFIX_TEMP + 1, buf.readUnsignedByte());
                         break;
                     case 25:
                         buf.readUnsignedByte();
diff --git a/src/org/traccar/protocol/WialonProtocolDecoder.java b/src/org/traccar/protocol/WialonProtocolDecoder.java
index 3dc282846..0bd793365 100644
--- a/src/org/traccar/protocol/WialonProtocolDecoder.java
+++ b/src/org/traccar/protocol/WialonProtocolDecoder.java
@@ -133,15 +133,15 @@ public class WialonProtocolDecoder extends BaseProtocolDecoder {
 
         // Other
         position.set(Event.KEY_HDOP, parser.group(index++));
-        position.set("inputs", parser.group(index++));
-        position.set("outputs", parser.group(index++));
+        position.set(Event.KEY_INPUT, parser.group(index++));
+        position.set(Event.KEY_OUTPUT, parser.group(index++));
 
         // ADC
         String adc = parser.group(index++);
         if (adc != null) {
             String[] values = adc.split(",");
             for (int i = 0; i < values.length; i++) {
-                position.set("adc" + (i + 1), values[i]);
+                position.set(Event.PREFIX_ADC + (i + 1), values[i]);
             }
         }
 
diff --git a/src/org/traccar/protocol/WondexProtocolDecoder.java b/src/org/traccar/protocol/WondexProtocolDecoder.java
index 1eb727fc6..556e1b2ad 100644
--- a/src/org/traccar/protocol/WondexProtocolDecoder.java
+++ b/src/org/traccar/protocol/WondexProtocolDecoder.java
@@ -110,8 +110,8 @@ public class WondexProtocolDecoder extends BaseProtocolDecoder {
         position.set(Event.KEY_INPUT, parser.group(index++));
         
         // ADC
-        position.set("adc1", parser.group(index++));
-        position.set("adc2", parser.group(index++));
+        position.set(Event.PREFIX_ADC + 1, parser.group(index++));
+        position.set(Event.PREFIX_ADC + 2, parser.group(index++));
         
         // Output
         position.set(Event.KEY_OUTPUT, parser.group(index++));