From 9811eadba3ecc105d4fa1642d48e1f00a4a9a667 Mon Sep 17 00:00:00 2001
From: nilei <nils.leideck@leidex.net>
Date: Fri, 29 May 2026 18:27:12 +0200
Subject: [PATCH] Add support for JT808 SMS response message (0x1300) (#5888)

* Update Jt808ProtocolDecoder.java

Added handling for 0x1300 message ID, which is a response form the device to a text message command.

* Update Jt808ProtocolDecoderTest.java

Added test for 0x1300 message ID frame.
---
 .../traccar/protocol/Jt808ProtocolDecoder.java  | 17 +++++++++++++++++
 .../protocol/Jt808ProtocolDecoderTest.java      |  4 ++++
 2 files changed, 21 insertions(+)

diff --git a/src/main/java/org/traccar/protocol/Jt808ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Jt808ProtocolDecoder.java
index 72362a3c1..99db8c4c2 100644
--- a/src/main/java/org/traccar/protocol/Jt808ProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/Jt808ProtocolDecoder.java
@@ -83,6 +83,7 @@ public class Jt808ProtocolDecoder extends BaseProtocolDecoder {
     public static final int MSG_REPORT_TEXT_MESSAGE = 0x6006;
     public static final int MSG_CONFIGURATION_PARAMETERS = 0x8103;
     public static final int MSG_COMMAND_RESPONSE = 0x0701;
+    public static final int MSG_TEXT_MESSAGE_RESPONSE = 0x1300;
     public static final int MSG_DRIVER_IDENTITY = 0x0702;
     public static final int MSG_VIDEO_REQUEST = 0x9101;
     public static final int MSG_VIDEO_CONTROL = 0x9102;
@@ -364,6 +365,22 @@ public class Jt808ProtocolDecoder extends BaseProtocolDecoder {
 
             return position;
 
+        } else if (type == MSG_TEXT_MESSAGE_RESPONSE) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            getLastLocation(position, null);
+
+            int bodyLength = BitUtil.to(attribute, 10);
+
+            buf.readUnsignedShort(); // response serial number
+
+            String result = buf.readCharSequence(bodyLength - 2, StandardCharsets.UTF_16BE).toString().trim();
+            position.set(Position.KEY_RESULT, result);
+
+            return position;
+
         } else if (type == MSG_HEARTBEAT) {
 
             sendGeneralResponse(channel, remoteAddress, id, type, index);
diff --git a/src/test/java/org/traccar/protocol/Jt808ProtocolDecoderTest.java b/src/test/java/org/traccar/protocol/Jt808ProtocolDecoderTest.java
index a0db92482..9e47aaea4 100644
--- a/src/test/java/org/traccar/protocol/Jt808ProtocolDecoderTest.java
+++ b/src/test/java/org/traccar/protocol/Jt808ProtocolDecoderTest.java
@@ -252,6 +252,10 @@ public class Jt808ProtocolDecoderTest extends ProtocolTest {
                 "283734303139303331313138352c312c3030312c454c4f434b2c332c35323934333929"),
                 Position.KEY_RESULT, "(740190311185,1,001,ELOCK,3,529439)");
 
+        verifyAttribute(decoder, binary(
+                "7e13000012045450091546010900000053006500740020004f004b0021000d197e"),
+                Position.KEY_RESULT, "Set OK!");
+
         verifyPosition(decoder, binary(
                 "7e55028436740190311185091607200239270613212607536108630000170a000000014600005ded05e203000000000b010d0c06005b003e00ab0a0302dc65100100a37e"));