diff --git a/APP_Framework/Framework/connection/4g/ec200t/ec200t.c b/APP_Framework/Framework/connection/4g/ec200t/ec200t.c
index cef26254a..145ea2d48 100644
--- a/APP_Framework/Framework/connection/4g/ec200t/ec200t.c
+++ b/APP_Framework/Framework/connection/4g/ec200t/ec200t.c
@@ -167,6 +167,7 @@ static int Ec200tIoctl(struct Adapter *adapter, int cmd, void *args)
     serial_cfg.serial_bit_order = STOP_BITS_1;
     serial_cfg.serial_invert_mode = NRZ_NORMAL;
 #ifdef ADAPTER_EC200T_DRIVER_EXT_PORT
+    serial_cfg.is_ext_uart = 1;
     serial_cfg.ext_uart_no = ADAPTER_EC200T_DRIVER_EXT_PORT;
     serial_cfg.port_configure = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/connection/bluetooth/hc08/hc08.c b/APP_Framework/Framework/connection/bluetooth/hc08/hc08.c
index ab6a42ef8..1798d5e2f 100644
--- a/APP_Framework/Framework/connection/bluetooth/hc08/hc08.c
+++ b/APP_Framework/Framework/connection/bluetooth/hc08/hc08.c
@@ -239,6 +239,7 @@ static int Hc08Open(struct Adapter *adapter)
     serial_cfg.serial_bit_order = STOP_BITS_1;
     serial_cfg.serial_invert_mode = NRZ_NORMAL;
 #ifdef ADAPTER_HC08_DRIVER_EXT_PORT
+    serial_cfg.is_ext_uart = 1;
     serial_cfg.ext_uart_no = ADAPTER_HC08_DRIVER_EXT_PORT;
     serial_cfg.port_configure = PORT_CFG_INIT;
 #endif
@@ -330,6 +331,7 @@ static int Hc08Ioctl(struct Adapter *adapter, int cmd, void *args)
     serial_cfg.serial_bit_order = STOP_BITS_1;
     serial_cfg.serial_invert_mode = NRZ_NORMAL;
 #ifdef ADAPTER_HC08_DRIVER_EXT_PORT
+    serial_cfg.is_ext_uart = 1;
     serial_cfg.ext_uart_no = ADAPTER_HC08_DRIVER_EXT_PORT;
     serial_cfg.port_configure = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/connection/ethernet/hfa21_ethernet/hfa21_ethernet.c b/APP_Framework/Framework/connection/ethernet/hfa21_ethernet/hfa21_ethernet.c
index ada295ecc..c75e4e26b 100644
--- a/APP_Framework/Framework/connection/ethernet/hfa21_ethernet/hfa21_ethernet.c
+++ b/APP_Framework/Framework/connection/ethernet/hfa21_ethernet/hfa21_ethernet.c
@@ -402,6 +402,7 @@ static int Hfa21EthernetIoctl(struct Adapter *adapter, int cmd, void *args)
     serial_cfg.serial_bit_order = BIT_ORDER_LSB;
     serial_cfg.serial_invert_mode = NRZ_NORMAL;
 #ifdef ADAPTER_HFA21_DRIVER_EXT_PORT
+    serial_cfg.is_ext_uart = 1;
     serial_cfg.ext_uart_no = ADAPTER_HFA21_DRIVER_EXT_PORT;
     serial_cfg.port_configure = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/connection/lora/e220/e220.c b/APP_Framework/Framework/connection/lora/e220/e220.c
index 880ba9e48..9f4f75d72 100644
--- a/APP_Framework/Framework/connection/lora/e220/e220.c
+++ b/APP_Framework/Framework/connection/lora/e220/e220.c
@@ -359,6 +359,7 @@ static int E220Open(struct Adapter *adapter)
 
     /*aiit board use ch438, so it needs more serial configuration*/
 #ifdef ADAPTER_E220_DRIVER_EXTUART
+    cfg.is_ext_uart = 1;
     cfg.ext_uart_no         = ADAPTER_E220_DRIVER_EXT_PORT;
     cfg.port_configure      = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/connection/nbiot/bc28/bc28.c b/APP_Framework/Framework/connection/nbiot/bc28/bc28.c
index e290172ba..33a2205b4 100644
--- a/APP_Framework/Framework/connection/nbiot/bc28/bc28.c
+++ b/APP_Framework/Framework/connection/nbiot/bc28/bc28.c
@@ -59,6 +59,7 @@ static int BC28UartOpen(struct Adapter *adapter)
 
     /*aiit board use ch438, so it needs more serial configuration*/
 #ifdef ADAPTER_BC28_DRIVER_EXTUART
+    cfg.is_ext_uart = 1;
     cfg.ext_uart_no         = ADAPTER_BC28_DRIVER_EXT_PORT;
     cfg.port_configure      = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/connection/wifi/esp07s_wifi/esp07s_wifi.c b/APP_Framework/Framework/connection/wifi/esp07s_wifi/esp07s_wifi.c
index 36c943b73..7b015f2ca 100755
--- a/APP_Framework/Framework/connection/wifi/esp07s_wifi/esp07s_wifi.c
+++ b/APP_Framework/Framework/connection/wifi/esp07s_wifi/esp07s_wifi.c
@@ -82,6 +82,7 @@ static int Esp07sUartOpen(struct Adapter *adapter)
     cfg.serial_buffer_size = SERIAL_RB_BUFSZ;
 
 #ifdef ADAPTER_ESP07S_DRIVER_EXT_PORT
+    cfg.is_ext_uart = 1;
     cfg.ext_uart_no         = ADAPTER_ESP07S_DRIVER_EXT_PORT;
     cfg.port_configure      = PORT_CFG_INIT;
 #endif
@@ -512,6 +513,7 @@ static int Esp07sWifiIoctl(struct Adapter *adapter, int cmd, void *args)
             cfg.serial_buffer_size = SERIAL_RB_BUFSZ;
 
 #ifdef ADAPTER_ESP07S_DRIVER_EXT_PORT
+            cfg.is_ext_uart = 1;
             cfg.ext_uart_no         = ADAPTER_ESP07S_DRIVER_EXT_PORT;
             cfg.port_configure      = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/connection/wifi/hfa21_wifi/hfa21_wifi.c b/APP_Framework/Framework/connection/wifi/hfa21_wifi/hfa21_wifi.c
index 2cc263416..00972660c 100755
--- a/APP_Framework/Framework/connection/wifi/hfa21_wifi/hfa21_wifi.c
+++ b/APP_Framework/Framework/connection/wifi/hfa21_wifi/hfa21_wifi.c
@@ -474,6 +474,7 @@ static int Hfa21WifiIoctl(struct Adapter *adapter, int cmd, void *args)
     serial_cfg.serial_bit_order = BIT_ORDER_LSB;
     serial_cfg.serial_invert_mode = NRZ_NORMAL;
 #ifdef ADAPTER_HFA21_DRIVER_EXT_PORT
+    serial_cfg.is_ext_uart = 1;
     serial_cfg.ext_uart_no = ADAPTER_HFA21_DRIVER_EXT_PORT;
     serial_cfg.port_configure = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/connection/zigbee/e18/e18.c b/APP_Framework/Framework/connection/zigbee/e18/e18.c
index c8138d07b..003db86b3 100644
--- a/APP_Framework/Framework/connection/zigbee/e18/e18.c
+++ b/APP_Framework/Framework/connection/zigbee/e18/e18.c
@@ -108,6 +108,7 @@ static int E18UartOpen(struct Adapter *adapter)
 
     /*aiit board use ch438, so it needs more serial configuration*/
 #ifdef ADAPTER_E18_DRIVER_EXTUART
+    cfg.is_ext_uart         = 1;
     cfg.ext_uart_no         = ADAPTER_E18_DRIVER_EXT_PORT;
     cfg.port_configure      = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/sensor/ch4/as830/as830.c b/APP_Framework/Framework/sensor/ch4/as830/as830.c
index 49ad1fc17..81cc37e19 100644
--- a/APP_Framework/Framework/sensor/ch4/as830/as830.c
+++ b/APP_Framework/Framework/sensor/ch4/as830/as830.c
@@ -65,6 +65,7 @@ static int SensorDeviceOpen(struct SensorDevice *sdev)
     cfg.serial_bit_order    = 0;
     cfg.serial_invert_mode  = 0;
 #ifdef SENSOR_AS830_DRIVER_EXTUART
+    cfg.is_ext_uart         = 1;
     cfg.ext_uart_no         = SENSOR_DEVICE_AS830_DEV_EXT_PORT;
     cfg.port_configure      = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/sensor/co2/g8s/g8s.c b/APP_Framework/Framework/sensor/co2/g8s/g8s.c
index 89c7583bc..a9030ab7d 100644
--- a/APP_Framework/Framework/sensor/co2/g8s/g8s.c
+++ b/APP_Framework/Framework/sensor/co2/g8s/g8s.c
@@ -70,6 +70,7 @@ static int SensorDeviceOpen(struct SensorDevice *sdev)
     cfg.serial_bit_order    = 0;
     cfg.serial_invert_mode  = 0;
 #ifdef SENSOR_G8S_DRIVER_EXTUART
+    cfg.is_ext_uart         = 1;
     cfg.ext_uart_no         = SENSOR_DEVICE_G8S_DEV_EXT_PORT;
     cfg.port_configure      = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/sensor/co2/zg09/zg09.c b/APP_Framework/Framework/sensor/co2/zg09/zg09.c
index d18f96f92..e74a84373 100644
--- a/APP_Framework/Framework/sensor/co2/zg09/zg09.c
+++ b/APP_Framework/Framework/sensor/co2/zg09/zg09.c
@@ -76,6 +76,7 @@ static int SensorDeviceOpen(struct SensorDevice *sdev)
     cfg.serial_bit_order    = 0;
     cfg.serial_invert_mode  = 0;
 #ifdef SENSOR_ZG09_DRIVER_EXTUART
+    cfg.is_ext_uart         = 1;
     cfg.ext_uart_no         = SENSOR_DEVICE_ZG09_DEV_EXT_PORT;
     cfg.port_configure      = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/sensor/hcho/tb600b_wq_hcho1os/tb600b_wq_hcho1os.c b/APP_Framework/Framework/sensor/hcho/tb600b_wq_hcho1os/tb600b_wq_hcho1os.c
index d1c103c8e..bb38f7f78 100644
--- a/APP_Framework/Framework/sensor/hcho/tb600b_wq_hcho1os/tb600b_wq_hcho1os.c
+++ b/APP_Framework/Framework/sensor/hcho/tb600b_wq_hcho1os/tb600b_wq_hcho1os.c
@@ -66,6 +66,7 @@ static int SensorDeviceOpen(struct SensorDevice *sdev)
     cfg.serial_bit_order    = 0;
     cfg.serial_invert_mode  = 0;
 #ifdef SENSOR_TB600B_WQ_HCHO1OS_DRIVER_EXTUART
+    cfg.is_ext_uart         = 1;
     cfg.ext_uart_no         = SENSOR_DEVICE_TB600B_WQ_HCHO1OS_DEV_EXT_PORT;
     cfg.port_configure      = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/sensor/iaq/tb600b_iaq10/tb600b_iaq10.c b/APP_Framework/Framework/sensor/iaq/tb600b_iaq10/tb600b_iaq10.c
index 14e2e13bd..3a7cf516b 100644
--- a/APP_Framework/Framework/sensor/iaq/tb600b_iaq10/tb600b_iaq10.c
+++ b/APP_Framework/Framework/sensor/iaq/tb600b_iaq10/tb600b_iaq10.c
@@ -73,6 +73,7 @@ static int SensorDeviceOpen(struct SensorDevice *sdev)
     cfg.serial_bit_order    = 0;
     cfg.serial_invert_mode  = 0;
 #ifdef SENSOR_TB600B_IAQ10_DRIVER_EXTUART
+    cfg.is_ext_uart         = 1;
     cfg.ext_uart_no         = SENSOR_DEVICE_TB600B_IAQ10_DEV_EXT_PORT;
     cfg.port_configure      = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/sensor/pm/ps5308/ps5308.c b/APP_Framework/Framework/sensor/pm/ps5308/ps5308.c
index d46a5a575..6634d8c55 100644
--- a/APP_Framework/Framework/sensor/pm/ps5308/ps5308.c
+++ b/APP_Framework/Framework/sensor/pm/ps5308/ps5308.c
@@ -98,6 +98,7 @@ static int SensorDeviceOpen(struct SensorDevice *sdev)
     cfg.serial_bit_order    = 0;
     cfg.serial_invert_mode  = 0;
 #ifdef SENSOR_PS5308_DRIVER_EXTUART
+    cfg.is_ext_uart         = 1;
     cfg.ext_uart_no         = SENSOR_DEVICE_PS5308_DEV_EXT_PORT;
     cfg.port_configure      = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/sensor/tvoc/tb600b_tvoc10/tb600b_tvoc10.c b/APP_Framework/Framework/sensor/tvoc/tb600b_tvoc10/tb600b_tvoc10.c
index 27847e0db..926ea8693 100644
--- a/APP_Framework/Framework/sensor/tvoc/tb600b_tvoc10/tb600b_tvoc10.c
+++ b/APP_Framework/Framework/sensor/tvoc/tb600b_tvoc10/tb600b_tvoc10.c
@@ -66,6 +66,7 @@ static int SensorDeviceOpen(struct SensorDevice *sdev)
     cfg.serial_bit_order    = 0;
     cfg.serial_invert_mode  = 0;
 #ifdef SENSOR_TB600B_TVOC10_DRIVER_EXTUART
+    cfg.is_ext_uart         = 1;
     cfg.ext_uart_no         = SENSOR_DEVICE_TB600B_TVOC10_DEV_EXT_PORT;
     cfg.port_configure      = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/sensor/voice/d124/d124.c b/APP_Framework/Framework/sensor/voice/d124/d124.c
index e066edf91..c77d6bc6c 100644
--- a/APP_Framework/Framework/sensor/voice/d124/d124.c
+++ b/APP_Framework/Framework/sensor/voice/d124/d124.c
@@ -102,6 +102,7 @@ static int SensorDeviceOpen(struct SensorDevice *sdev)
     cfg.serial_bit_order    = 0;
     cfg.serial_invert_mode  = 0;
 #ifdef SENSOR_D124_DRIVER_EXTUART    
+    cfg.is_ext_uart         = 1;
     cfg.ext_uart_no         = SENSOR_DEVICE_D124_DEV_EXT_PORT;
     cfg.port_configure      = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/sensor/winddirection/qs-fx/qs-fx.c b/APP_Framework/Framework/sensor/winddirection/qs-fx/qs-fx.c
index 24a6cb726..0a3987cc8 100644
--- a/APP_Framework/Framework/sensor/winddirection/qs-fx/qs-fx.c
+++ b/APP_Framework/Framework/sensor/winddirection/qs-fx/qs-fx.c
@@ -66,6 +66,7 @@ static int SensorDeviceOpen(struct SensorDevice *sdev)
     cfg.serial_bit_order    = 0;
     cfg.serial_invert_mode  = 0;
 #ifdef SENSOR_QS_FX_DRIVER_EXTUART    
+    cfg.is_ext_uart         = 1;
     cfg.ext_uart_no         = SENSOR_DEVICE_QS_FX_DEV_EXT_PORT;
     cfg.port_configure      = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/sensor/windspeed/qs-fs/qs-fs.c b/APP_Framework/Framework/sensor/windspeed/qs-fs/qs-fs.c
index 427fa8273..2ff374381 100644
--- a/APP_Framework/Framework/sensor/windspeed/qs-fs/qs-fs.c
+++ b/APP_Framework/Framework/sensor/windspeed/qs-fs/qs-fs.c
@@ -64,7 +64,8 @@ static int SensorDeviceOpen(struct SensorDevice *sdev)
     cfg.serial_parity_mode  = PARITY_NONE;
     cfg.serial_bit_order    = 0;
     cfg.serial_invert_mode  = 0;
-#ifdef SENSOR_QS_FS_DRIVER_EXTUART    
+#ifdef SENSOR_QS_FS_DRIVER_EXTUART  
+    cfg.is_ext_uart         = 1;  
     cfg.ext_uart_no         = SENSOR_DEVICE_QS_FS_DEV_EXT_PORT;
     cfg.port_configure      = PORT_CFG_INIT;
 #endif
diff --git a/APP_Framework/Framework/transform_layer/nuttx/transform.h b/APP_Framework/Framework/transform_layer/nuttx/transform.h
index 71b4f48e7..98f83044f 100644
--- a/APP_Framework/Framework/transform_layer/nuttx/transform.h
+++ b/APP_Framework/Framework/transform_layer/nuttx/transform.h
@@ -142,7 +142,8 @@ struct SerialDataCfg
     uint8_t serial_invert_mode;
     uint16_t serial_buffer_size;
 
-    uint8 ext_uart_no;
+    uint8_t is_ext_uart;
+    uint8_t ext_uart_no;
     enum ExtSerialPortConfigure port_configure;
 };
 
diff --git a/APP_Framework/Framework/transform_layer/rtthread/transform.h b/APP_Framework/Framework/transform_layer/rtthread/transform.h
index 3c1cce549..5eb7fecee 100644
--- a/APP_Framework/Framework/transform_layer/rtthread/transform.h
+++ b/APP_Framework/Framework/transform_layer/rtthread/transform.h
@@ -145,6 +145,7 @@ struct SerialDataCfg
     uint8_t serial_invert_mode;
     uint16_t serial_buffer_size;
 
+    uint8_t is_ext_uart;
     uint8_t ext_uart_no;
     enum ExtSerialPortConfigure port_configure;
 };
diff --git a/APP_Framework/Framework/transform_layer/xizi/transform.h b/APP_Framework/Framework/transform_layer/xizi/transform.h
index 34c8f76ce..f6ec84fb3 100644
--- a/APP_Framework/Framework/transform_layer/xizi/transform.h
+++ b/APP_Framework/Framework/transform_layer/xizi/transform.h
@@ -133,6 +133,7 @@ struct SerialDataCfg
     uint16_t serial_buffer_size;
     int32 serial_timeout;
 
+    uint8_t is_ext_uart;
     uint8_t ext_uart_no;
     enum ExtSerialPortConfigure port_configure;
 };