From 8ecc4af154ec67a8818a21b96a9f10a74bfc919c Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Sun, 28 Mar 2021 14:19:43 -0700
Subject: Decode Futurecom alarms

---
 .../org/traccar/protocol/KhdProtocolDecoder.java   | 47 ++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/src/main/java/org/traccar/protocol/KhdProtocolDecoder.java b/src/main/java/org/traccar/protocol/KhdProtocolDecoder.java
index 1f3798bd2..b4fce5cbe 100644
--- a/src/main/java/org/traccar/protocol/KhdProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/KhdProtocolDecoder.java
@@ -24,6 +24,7 @@ import org.traccar.DeviceSession;
 import org.traccar.NetworkMessage;
 import org.traccar.Protocol;
 import org.traccar.helper.BcdUtil;
+import org.traccar.helper.BitUtil;
 import org.traccar.helper.Checksum;
 import org.traccar.helper.DateBuilder;
 import org.traccar.helper.UnitsConverter;
@@ -65,6 +66,42 @@ public class KhdProtocolDecoder extends BaseProtocolDecoder {
     public static final int MSG_SMS_ALARM_SWITCH = 0x86;
     public static final int MSG_PERIPHERAL = 0xA3;
 
+    private void decodeAlarmStatus(Position position, byte[] status) {
+        if (BitUtil.check(status[0], 4)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_LOW_POWER);
+        } else if (BitUtil.check(status[0], 6)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE_EXIT);
+        } else if (BitUtil.check(status[0], 7)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE_ENTER);
+        } else if (BitUtil.check(status[1], 1)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
+        } else if (BitUtil.check(status[1], 3)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_POWER_CUT);
+        } else if (BitUtil.check(status[1], 6)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_TOW);
+        } else if (BitUtil.check(status[1], 7)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_DOOR);
+        } else if (BitUtil.check(status[2], 2)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_TEMPERATURE);
+        } else if (BitUtil.check(status[2], 4)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_TAMPERING);
+        }  else if (BitUtil.check(status[2], 6)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_FATIGUE_DRIVING);
+        } else if (BitUtil.check(status[2], 7)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_IDLE);
+        } else if (BitUtil.check(status[6], 3)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_VIBRATION);
+        } else if (BitUtil.check(status[6], 4)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+        } else if (BitUtil.check(status[6], 5)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+        } else if (BitUtil.check(status[6], 6)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
+        } else if (BitUtil.check(status[6], 7)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_ACCIDENT);
+        }
+    }
+
     @Override
     protected Object decode(
             Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
@@ -178,6 +215,16 @@ public class KhdProtocolDecoder extends BaseProtocolDecoder {
 
                 }
 
+            }  else {
+
+                buf.readUnsignedByte(); // overloaded state
+                buf.readUnsignedByte(); // logging status
+
+                byte[] alarmStatus = new byte[8];
+                buf.readBytes(alarmStatus);
+
+                decodeAlarmStatus(position, alarmStatus);
+
             }
 
             return position;
-- 
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