diff --git a/config4.json b/config4.json
index 2617eb4..fac1330 100644
--- a/config4.json
+++ b/config4.json
@@ -1,8 +1,8 @@
 {
-  "client_id": "gw_simulator_888",
-  "broker_ip": "127.0.0.1",
-  "port": 1883,
-  "username": "hjemq-c2",
+  "client_id": "gw_simulator_999",
+  "broker_ip": "116.236.50.106",
+  "port": 8764,
+  "username": "hjemq_sim_icm",
   "passwd": "Hj57471000",
   "publish_topic": "GateWayPublicTopic_Server",
   "publish_interval": 5000,
@@ -10,7 +10,7 @@
   "publish_qos": 0,
   "subscribe_qos": 0,
   "subcriber_topic": "ServerPublicTopic_GateWay",
-  "FsuCodes": ["11010110100111","11010110100112","11010110100113","11010110100114"],
+  "FsuCodes": ["11111110000001","11111110000002","11111110000003","11111110000004"],
   "publish_data": {
     "FsuCode": "11010110100999",
     "type": "gateway-data",
@@ -163,8 +163,8 @@
         "Factor": "100",
         "type": "random_number",
         "RND": [
-          4980,
-          5210
+          5001,
+          5040
         ]
       }, 
       {
@@ -174,7 +174,7 @@
         "type": "random_number",
         "RND": [
           3000,
-          4600
+          3600
         ]
       }, 
       {
@@ -183,8 +183,8 @@
         "Factor": "100",
         "type": "random_number",
         "RND": [
-          3100,
-          6600
+          5100,
+          7600
         ]
       }, 
       {
@@ -193,8 +193,8 @@
         "Factor": "100",
         "type": "random_number",
         "RND": [
-          80,
-          85
+          88,
+          89
         ]
       }, 
       {
@@ -284,7 +284,7 @@
         "type": "random_number",
         "RND": [
           20,
-          56
+          36
         ]
       }, 
       {
diff --git a/gwsimulator.py b/gwsimulator.py
index 6344291..26ce7b0 100644
--- a/gwsimulator.py
+++ b/gwsimulator.py
@@ -117,8 +117,34 @@ def pub_connect_mqtt():
         else:
             logger.error("Failed to connect, return code %d", rc)
 
-    client = mqtt_client.Client(protocol=3, client_id=mqtt_conf.client_id)
+    def on_disconnect(client, userdata, rc):
+        """断开连接回调"""
+        logger.info(f"[{time.ctime()}] 连接断开，原因：{client.error_string(rc)}")
+        if rc != 0:
+            logger.info("尝试重新连接...")
+            reconnect()
+
+    def on_publish(client, userdata, mid):
+        """消息发布回调"""
+        logger.info(f"[{time.ctime()}] 消息已确认送达 (MID: {mid})")
+
+    def reconnect():
+        """自动重连机制"""
+        reconnect_delay = 5
+        try:
+            logger.info(f"等待{reconnect_delay}秒后尝试重连...")
+            time.sleep(reconnect_delay)
+            client.reconnect()
+        except Exception as e:
+            logger.info(f"重连失败：{str(e)}")
+
+    client = mqtt_client.Client(callback_api_version=mqtt_client.CallbackAPIVersion.VERSION1, protocol=4,
+                                client_id=mqtt_conf.client_id, reconnect_on_failure=True)
     client.on_connect = on_connect
+
+    client.on_disconnect = on_disconnect
+    client.on_publish = on_publish
+
     client.username_pw_set(username=mqtt_conf.username, password=mqtt_conf.passwd)
     client.connect(host=mqtt_conf.broker_ip, port=mqtt_conf.port, keepalive=60)
     time.sleep(1)
@@ -181,11 +207,24 @@ def publish(client):
         for fsu_code in mqtt_conf.fsuCodes:
             logger.info("Processing fsuCode: " + fsu_code)
             msg = build_publish_msg(fsu_code)
-            result = client.publish(topic=mqtt_conf.publish_topic, payload=msg, qos=mqtt_conf.publish_qos)
-            # result: [0, 1]
-            status = result[0]
+            msg_info = client.publish(topic=mqtt_conf.publish_topic, payload=msg, qos=mqtt_conf.publish_qos)
+            # msg_info : [0, 1]
+            status = msg_info[0]
+            mid = msg_info[1]
+
+            msg_info.wait_for_publish()
+
+            try:
+                b = msg_info.is_published()
+                if b:
+                    logger.info(f">> `#{msg_count}` Message #{mid} is published!")
+                else:
+                    logger.error(f">> `#{msg_count}` Message failed to be published!")
+            except Exception as e:
+                dump_exception_msg(e)
+
             msg_count += 1
-            if status == 0:
+            if status == mqtt_client.MQTT_ERR_SUCCESS:
                 logger.info(f"Send `#{msg_count}` message to topic `{mqtt_conf.publish_topic}`: `{msg}` ")
             else:
                 logger.error(f"Failed to send `#{msg_count}` message to topic {mqtt_conf.publish_topic}")
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..9828d28
Binary files /dev/null and b/requirements.txt differ