diff --git a/DBNMQTTool/dbn_mqtt_tool/protocol.py b/DBNMQTTool/dbn_mqtt_tool/protocol.py
index 33d1e51..ad183a9 100644
--- a/DBNMQTTool/dbn_mqtt_tool/protocol.py
+++ b/DBNMQTTool/dbn_mqtt_tool/protocol.py
@@ -1,7 +1,7 @@
 """
 DLD960 IoT MQTT 协议定义
 
-基于《DLD960_IoT_MQTT协议.md》V1.01
+基于《DLD960_IoT_MQTT协议.md》V1.03
 双主题结构：{sn}/srv（服务器下发）、{sn}/dev（设备上报）
 消息类型由 JSON `cmd` 字段区分。
 """
diff --git a/DBNMQTTool/main.py b/DBNMQTTool/main.py
index 7d05f1c..583b246 100644
--- a/DBNMQTTool/main.py
+++ b/DBNMQTTool/main.py
@@ -419,6 +419,21 @@ class MainWindow(QMainWindow):
         g2l.addLayout(g2l2)
         layout.addWidget(g2)
 
+        # -- initialize --
+        g_init = QGroupBox("上电初始化 (initialize) — V1.03")
+        g_init_l = QVBoxLayout(g_init)
+        self._sim_init = QPlainTextEdit()
+        self._sim_init.setFont(QFont("Consolas", 10))
+        self._sim_init.setPlainText(self._sample_initialize_data())
+        g_init_l.addWidget(self._sim_init)
+        g_init_l2 = QHBoxLayout()
+        b_init = QPushButton("发送")
+        b_init.clicked.connect(self._sim_send_initialize)
+        g_init_l2.addWidget(b_init)
+        g_init_l2.addStretch()
+        g_init_l.addLayout(g_init_l2)
+        layout.addWidget(g_init)
+
         # -- heartbeat --
         g3 = QGroupBox("心跳上报 (heartbeat)")
         g3l = QVBoxLayout(g3)
@@ -479,6 +494,24 @@ class MainWindow(QMainWindow):
             ]}
         }, indent=2)
 
+    def _sample_initialize_data(self) -> str:
+        return json.dumps({
+            "msg_id": 1,
+            "cmd": "initialize",
+            "ts": 1719000000,
+            "data": {
+                "dev_serial": "DC045A49718F",
+                "model": "DLD960",
+                "hard_ver": "1.0",
+                "soft_ver": "1.0",
+                "extra_info": {
+                    "code": "869756049404948",
+                    "csq": "21",
+                    "location": "113.9237976,022.6400375"
+                }
+            }
+        }, indent=2)
+
     def _sample_heartbeat_data(self) -> str:
         return json.dumps({
             "msg_id": 200,
@@ -509,6 +542,10 @@ class MainWindow(QMainWindow):
         sn = self._sim_sn.text()
         self._sim_publish(topic_up(sn), self._sim_event.toPlainText())
 
+    def _sim_send_initialize(self):
+        sn = self._sim_sn.text()
+        self._sim_publish(topic_up(sn), self._sim_init.toPlainText())
+
     def _sim_send_hb(self):
         sn = self._sim_sn.text()
         self._sim_publish(topic_up(sn), self._sim_hb.toPlainText())
@@ -602,6 +639,7 @@ class MainWindow(QMainWindow):
         item = QTreeWidgetItem(dev, [topic_up(sn), "设备发布：loop_data / event_report / heartbeat / 命令响应"])
         # 子条目列出 cmd 类型
         for cmd_name, desc in [
+            ("initialize", "设备上电初始化 (V1.03)"),
             ("loop_data", "线圈传感数据上报"),
             ("event_report", "事件上报（有车/无车/故障）"),
             ("heartbeat", "设备心跳"),
diff --git a/docs/DLD960_IoT_MQTT协议.md b/docs/DLD960_IoT_MQTT协议.md
index ab4f2ea..5c1d314 100644
--- a/docs/DLD960_IoT_MQTT协议.md
+++ b/docs/DLD960_IoT_MQTT协议.md
@@ -637,11 +637,13 @@ dld960/{dev_serial}/{direction}
   "ts": 1719000000,
   "data": {
     "dev_serial":"A1B2C3D4E5F6",
+    "model": "DLD960",
+    "hard_ver": "1.0",
+    "soft_ver": "1.0",
     "extra_info": {
       "code": "869756049404948",
       "csq": "21",
       "location": "113.9237976,022.6400375",
-      "version": "1.0.1"
     }
   }
 }
@@ -650,10 +652,12 @@ dld960/{dev_serial}/{direction}
 | 字段 | 类型 | 说明 |
 |------|------|------|
 | `data.dev_serial` | string | 设备序列码 |
+| `data.model` | string | 产品型号 |
+| `data.hard_ver` | string | 硬件版本 |
+| `data.soft_ver` | string | 固件版本 |
 | `data.extra_info.code` | string | 可选，设备代码如IMSI/ICCID |
 | `data.extra_info.csq` | string | 可选，当前信号强度 |
 | `data.extra_info.location` | string | 可选，经纬度（经度,纬度） |
-| `data.extra_info.version` | string | 版本号 |
 
 
 ## 5.2 线圈传感数据 `loop_data`
diff --git a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/iot_mqtt_srv.c b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/iot_mqtt_srv.c
index 6b1b760..dc18169 100644
--- a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/iot_mqtt_srv.c
+++ b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/iot_mqtt_srv.c
@@ -427,12 +427,16 @@ void iot_mqtt_publish_sensor(void) {
 
     snprintf(p, remaining, "]}");
 
-    /* Wrap and publish */
+    /* Wrap and publish — V1.01 双主题模型: dld960/{sn}/dev */
     snprintf(payload, sizeof(payload),
         "{\"msg_id\":%d,\"cmd\":\"loop_data\",\"ts\":%lu,\"data\":%s}",
         ++g_iot_msg_id, mstick() / 1000, data_json);
 
-    mqtt_publish((char *)g_iot_topic.topic_pub, payload, 0);
+    {
+        char topic[IOT_MQTT_TOPIC_MAX_LEN];
+        snprintf(topic, sizeof(topic), "dld960/%s/dev", g_iot_dev_serial);
+        mqtt_publish(topic, payload, 0);
+    }
 
 done:
     InitPkgUart(&g_pkg_uart_2);
@@ -463,7 +467,7 @@ static void iot_send_heartbeat(void) {
         loop_ok[2] ? "true" : "false", loop_ok[3] ? "true" : "false");
 
     char topic[IOT_MQTT_TOPIC_MAX_LEN];
-    iot_make_topic(topic, sizeof(topic), "dev", "status", NULL);
+    snprintf(topic, sizeof(topic), "dld960/%s/dev", g_iot_dev_serial);
     iot_mqtt_publish(topic, payload, strlen(payload), 0);
 }
 
diff --git a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/net_srv.c b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/net_srv.c
index 5e05601..c8ac243 100644
--- a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/net_srv.c
+++ b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/net_srv.c
@@ -177,30 +177,32 @@ void mqtt_publish(char *topic, char *message, int req_qos)
 
 void dev_initialize_pub(void)
 {
-    char *mBuff = (char *)malloc(256);
+    char *mBuff = (char *)malloc(512);
     if(mBuff == NULL)
     {
         return;
     }
-    memset(mBuff, 0, 256);
+    memset(mBuff, 0, 512);
 
     // V1.03: 上线后发布 initialize，告知服务器设备信息
-    // 格式: {msg_id, cmd:"initialize", ts, data:{dev_serial, extra_info:{code,csq,location,version}}}
+    // 格式: {msg_id, cmd:"initialize", ts, data:{dev_serial, model, hard_ver, soft_ver, extra_info:{code,csq,location}}}
     uint32_t now = (mstick() > 0) ? (uint32_t)(mstick() / 1000) : 0;
+    char topic[64];
+    snprintf(topic, sizeof(topic), "dld960/%s/dev", g_dev_number_str);
     sprintf((char *)mBuff,
         "{\"msg_id\":%lu,\"cmd\":\"initialize\",\"ts\":%lu,"
-        "\"data\":{\"dev_serial\":\"%s\","
+        "\"data\":{\"dev_serial\":\"%s\",\"model\":\"%s\","
+        "\"hard_ver\":\"%s\",\"soft_ver\":\"%s\","
         "\"extra_info\":{\"code\":\"%s\",\"csq\":\"%d\","
-        "\"location\":\"%s\",\"version\":\"%s\"}}}",
-        (unsigned long)++g_msg_id, (unsigned long)now,
-        g_dev_number_str,
-        "0", 0, "", FIRMWARE_VER);
+        "\"location\":\"%s\"}}}",
+        (unsigned long)++g_iot_msg_id, (unsigned long)now,
+        g_dev_number_str, PRODUCT_MODEL,
+        HARDWARE_VER, FIRMWARE_VER,
+        "0", 0, "");
 
-    PRINT("
-\nWill publish initialize_topic:\n%s
-\n", mBuff);
+    PRINT("\nWill publish initialize topic=%s:\n%s\n", topic, mBuff);
 
-    mqtt_publish((char *)(g_iot_topic.topic_pub), (char *)mBuff, 0);
+    mqtt_publish(topic, (char *)mBuff, 0);
 
     free(mBuff);
 }