From 23f83e9f1c6c0f183256a3952a8b3a819dc0ea1c Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Fri, 6 Nov 2015 11:56:19 +1300
Subject: Finish OBD decoder implementation

---
 src/org/traccar/helper/ObdDecoder.java             | 50 +++++++++++++++++++++-
 src/org/traccar/model/Extensible.java              |  6 +++
 .../traccar/protocol/UlbotechProtocolDecoder.java  | 11 ++---
 3 files changed, 59 insertions(+), 8 deletions(-)

(limited to 'src')

diff --git a/src/org/traccar/helper/ObdDecoder.java b/src/org/traccar/helper/ObdDecoder.java
index 63fd30b09..684702bba 100644
--- a/src/org/traccar/helper/ObdDecoder.java
+++ b/src/org/traccar/helper/ObdDecoder.java
@@ -15,13 +15,61 @@
  */
 package org.traccar.helper;
 
+import org.traccar.model.Event;
+
+import java.util.AbstractMap;
+import java.util.Map;
+
 public class ObdDecoder {
 
     private static final int MODE_CURRENT = 0x01;
     private static final int MODE_FREEZE_FRAME = 0x02;
-    private static final int MODE_DTC = 0x03; // diagnostic trouble codes
 
+    private static final int PID_ENGINE_LOAD = 0x04;
+    private static final int PID_COOLANT_TEMPERATURE = 0x05;
+    private static final int PID_ENGINE_RPM = 0x0C;
+    private static final int PID_VEHICLE_SPEED = 0x0D;
+    private static final int PID_THROTTLE_POSITION = 0x11;
+    private static final int PID_MIL_DISTANCE = 0x21;
+    private static final int PID_FUEL_LEVEL = 0x2F;
+    private static final int PID_DISTANCE_CLEARED = 0x31;
+
+    public static Map.Entry<String, Object> decode(int mode, int pid, String value) {
+        switch (mode) {
+            case MODE_CURRENT:
+            case MODE_FREEZE_FRAME:
+                return decodeData(pid, value);
+            default:
+                return null;
+        }
+    }
 
+    private static Map.Entry<String, Object> createEntry(String key, Object value) {
+        return new AbstractMap.SimpleEntry<>(key, value);
+    }
 
+    private static Map.Entry<String, Object> decodeData(int pid, String value) {
+        int intValue = Integer.parseInt(value, 16);
+        switch (pid) {
+            case PID_ENGINE_LOAD:
+                return createEntry("engine-load", intValue * 100 / 255);
+            case PID_COOLANT_TEMPERATURE:
+                return createEntry("coolant-temperature", intValue - 40);
+            case PID_ENGINE_RPM:
+                return createEntry(Event.KEY_RPM, intValue / 4);
+            case PID_VEHICLE_SPEED:
+                return createEntry(Event.KEY_OBD_SPEED, intValue);
+            case PID_THROTTLE_POSITION:
+                return createEntry("throttle", intValue * 100 / 255);
+            case PID_MIL_DISTANCE:
+                return createEntry("mil-distance", intValue);
+            case PID_FUEL_LEVEL:
+                return createEntry(Event.KEY_FUEL, intValue * 100 / 255);
+            case PID_DISTANCE_CLEARED:
+                return createEntry(Event.KEY_FUEL, intValue);
+            default:
+                return null;
+        }
+    }
 
 }
diff --git a/src/org/traccar/model/Extensible.java b/src/org/traccar/model/Extensible.java
index a821d0e43..40a286987 100644
--- a/src/org/traccar/model/Extensible.java
+++ b/src/org/traccar/model/Extensible.java
@@ -52,4 +52,10 @@ public abstract class Extensible extends Message {
         }
     }
 
+    public void add(Map.Entry<String, Object> entry) {
+        if (entry.getValue() != null) {
+            attributes.put(entry.getKey(), entry.getValue());
+        }
+    }
+
 }
diff --git a/src/org/traccar/protocol/UlbotechProtocolDecoder.java b/src/org/traccar/protocol/UlbotechProtocolDecoder.java
index a3edfdb07..68d04906d 100644
--- a/src/org/traccar/protocol/UlbotechProtocolDecoder.java
+++ b/src/org/traccar/protocol/UlbotechProtocolDecoder.java
@@ -24,6 +24,7 @@ import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
 import org.traccar.Context;
 import org.traccar.helper.BitUtil;
+import org.traccar.helper.ObdDecoder;
 import org.traccar.helper.UnitsConverter;
 import org.traccar.model.Event;
 import org.traccar.model.Position;
@@ -58,10 +59,9 @@ public class UlbotechProtocolDecoder extends BaseProtocolDecoder {
         int end = buf.readerIndex() + length;
 
         while (buf.readerIndex() < end) {
-            int parameterLength = buf.readUnsignedByte() >> 4;
-            String key = String.format("pid%02X", buf.readUnsignedByte());
-            String value = ChannelBuffers.hexDump(buf.readBytes(parameterLength - 2));
-            position.set(key, value);
+            int parameterLength = buf.getUnsignedByte(buf.readerIndex()) >> 4;
+            position.add(ObdDecoder.decode(buf.readUnsignedByte() & 0x0F, buf.readUnsignedByte(),
+                    ChannelBuffers.hexDump(buf.readBytes(parameterLength - 2))));
         }
     }
 
@@ -105,18 +105,15 @@ public class UlbotechProtocolDecoder extends BaseProtocolDecoder {
         buf.readUnsignedByte(); // version
         buf.readUnsignedByte(); // type
 
-        // Create new position
         Position position = new Position();
         position.setProtocol(getProtocolName());
 
-        // Get device id
         String imei = ChannelBuffers.hexDump(buf.readBytes(8)).substring(1);
         if (!identify(imei, channel)) {
             return null;
         }
         position.setDeviceId(getDeviceId());
 
-        // Time
         long seconds = buf.readUnsignedInt() & 0x7fffffffL;
         seconds += 946684800L; // 2000-01-01 00:00
         seconds -= timeZone;
-- 
cgit v1.2.3