From c9245e2dd791d115011dbb4490733fd9102415d1 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Sun, 9 Jul 2017 00:33:21 +1200
Subject: Decode AZ735 protocol status

---
 src/org/traccar/protocol/Gt06ProtocolDecoder.java | 42 ++++++++++++++++++++---
 1 file changed, 38 insertions(+), 4 deletions(-)

(limited to 'src')

diff --git a/src/org/traccar/protocol/Gt06ProtocolDecoder.java b/src/org/traccar/protocol/Gt06ProtocolDecoder.java
index 357256d76..24bedcabf 100644
--- a/src/org/traccar/protocol/Gt06ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gt06ProtocolDecoder.java
@@ -187,16 +187,19 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
 
     private boolean decodeLbs(Position position, ChannelBuffer buf, boolean hasLength) {
 
-        int lbsLength = 0;
+        int length = 0;
         if (hasLength) {
-            lbsLength = buf.readUnsignedByte();
+            length = buf.readUnsignedByte();
+            if (length == 0) {
+                return false;
+            }
         }
 
         position.setNetwork(new Network(CellTower.from(
                 buf.readUnsignedShort(), buf.readUnsignedByte(), buf.readUnsignedShort(), buf.readUnsignedMedium())));
 
-        if (lbsLength > 0) {
-            buf.skipBytes(lbsLength - 9);
+        if (length > 0) {
+            buf.skipBytes(length - 8);
         }
 
         return true;
@@ -543,6 +546,37 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
 
             decodeLbs(position, buf, true);
 
+            buf.skipBytes(buf.readUnsignedByte()); // additional cell towers
+            buf.skipBytes(buf.readUnsignedByte()); // wifi access point
+
+            int status = buf.readUnsignedByte();
+            position.set(Position.KEY_STATUS, status);
+
+            if (type == MSG_AZ735_ALARM) {
+                switch (status) {
+                    case 0xA0:
+                        position.set(Position.KEY_ARMED, true);
+                        break;
+                    case 0xA1:
+                        position.set(Position.KEY_ARMED, false);
+                        break;
+                    case 0xA2:
+                    case 0xA3:
+                        position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
+                        break;
+                    case 0xA4:
+                        position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+                        break;
+                    case 0xA5:
+                        position.set(Position.KEY_ALARM, Position.ALARM_DOOR);
+                        break;
+                    default:
+                        break;
+                }
+            }
+
+            buf.skipBytes(buf.readUnsignedByte()); // reserved extension
+
             sendResponse(channel, true, type);
 
             return position;
-- 
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