diff --git a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/iot_mqtt_srv.c b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/iot_mqtt_srv.c
index 874b409..acb09e7 100644
--- a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/iot_mqtt_srv.c
+++ b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/iot_mqtt_srv.c
@@ -587,6 +587,9 @@ void iot_mqtt_poll(void) {
  * 初始化
  *===========================================================================*/
 void iot_mqtt_init(void) {
+    /* 复用 net_srv.c 创建的 MQTT socket (SocketId_TCP) */
+    g_iot_socket = SocketId_TCP;
+
     /* 初始化设备序列码 (12 hex chars) */
     snprintf(g_iot_dev_serial, sizeof(g_iot_dev_serial),
              "%02X%02X%02X%02X%02X%02X",