1 files changed, 9 insertions, 3 deletions
diff --git a/src/org/traccar/protocol/AtrackProtocolDecoder.java b/src/org/traccar/protocol/AtrackProtocolDecoder.java
index ac208c0f2..b0f094103 100644
--- a/src/org/traccar/protocol/AtrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/AtrackProtocolDecoder.java
@@ -21,6 +21,7 @@ import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
 import org.traccar.Context;
 import org.traccar.DeviceSession;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.DateBuilder;
 import org.traccar.helper.Parser;
 import org.traccar.helper.PatternBuilder;
@@ -410,16 +411,21 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
         return positions;
     }
 
+    private void sendResponse(Channel channel, SocketAddress remoteAddress) {
+        if (channel != null) {
+            channel.write(ChannelBuffers.wrappedBuffer(DataConverter.parseHex("fe02")), remoteAddress);
+        }
+    }
+
     @Override
     protected Object decode(
             Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
 
         ChannelBuffer buf = (ChannelBuffer) msg;
 
+        sendResponse(channel, remoteAddress);
+
         if (buf.getUnsignedShort(buf.readerIndex()) == 0xfe02) {
-            if (channel != null) {
-                channel.write(buf, remoteAddress); // keep-alive message
-            }
             return null;
         } else if (buf.getByte(buf.readerIndex()) == '$') {
             return decodeInfo(channel, remoteAddress, buf.toString(StandardCharsets.US_ASCII).trim());