diff --git a/APP_Framework/Applications/general_functions/linklist/list.h b/APP_Framework/Applications/general_functions/linklist/list.h
index 7c2f4892..09c2c806 100644
--- a/APP_Framework/Applications/general_functions/linklist/list.h
+++ b/APP_Framework/Applications/general_functions/linklist/list.h
@@ -11,16 +11,16 @@
 */
 
 /**
-* @file:    xs_klist.h
+* @file:    list.h
 * @brief:   function declaration and structure defintion of linklist
 * @version: 1.0
 * @author:  AIIT XUOS Lab
-* @date:    2020/3/2
+* @date:    2020/6/8
 *
 */
 
-#ifndef __XS_KLIST_H__
-#define __XS_KLIST_H__
+#ifndef __LIST_H__
+#define __LIST_H__
 
 #include <errno.h>
 #include <stdint.h>
diff --git a/APP_Framework/Framework/Kconfig b/APP_Framework/Framework/Kconfig
new file mode 100644
index 00000000..e69de29b
diff --git a/APP_Framework/Framework/connection/Makefile b/APP_Framework/Framework/connection/Makefile
new file mode 100644
index 00000000..1e13f243
--- /dev/null
+++ b/APP_Framework/Framework/connection/Makefile
@@ -0,0 +1,3 @@
+SRC_FILES := adapter.c
+
+include $(KERNEL_ROOT)/compiler.mk
\ No newline at end of file
diff --git a/APP_Framework/Framework/connection/adapter.c b/APP_Framework/Framework/connection/adapter.c
new file mode 100644
index 00000000..c6fe082c
--- /dev/null
+++ b/APP_Framework/Framework/connection/adapter.c
@@ -0,0 +1,264 @@
+/*
+* Copyright (c) 2020 AIIT XUOS Lab
+* XiUOS is licensed under Mulan PSL v2.
+* You can use this software according to the terms and conditions of the Mulan PSL v2.
+* You may obtain a copy of Mulan PSL v2 at:
+*        http://license.coscl.org.cn/MulanPSL2
+* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+* See the Mulan PSL v2 for more details.
+*/
+
+/**
+ * @file adapter.c
+ * @brief Implement the communication adapter framework management and API
+ * @version 1.0
+ * @author AIIT XUOS Lab
+ * @date 2021.05.10
+ */
+
+#include <adapter.h>
+
+static DoubleLinklistType adapter_list;
+
+static int adapter_list_lock;
+
+/**
+ * @description: Init adapter framework
+ * @return 0
+ */
+int AdapterFrameworkInit(void)
+{
+    InitDoubleLinkList(&adapter_list);
+
+    adapter_list_lock = KMutexCreate();
+
+    return 0;
+}
+
+/**
+ * @description: Find adapter device by name
+ * @param name - name string
+ * @return adapter device pointer
+ */
+struct Adapter *AdapterDeviceFind(const char *name)
+{
+    struct Adapter *ret = NULL;
+    struct SysDoubleLinklistNode *node;
+
+    if (name == NULL)
+        return NULL;
+
+    UserMutexObtain(adapter_list_lock, -1);
+    DOUBLE_LINKLIST_FOR_EACH(node, &adapter_list) {
+        struct Adapter *adapter =CONTAINER_OF(node,
+                struct Adapter, link);
+        if (strncmp(adapter->name, name, NAME_NUM_MAX) == 0) {
+            ret = adapter;
+            break;
+        }
+    }
+    UserMutexAbandon(adapter_list_lock);
+
+    return ret;
+}
+
+/**
+ * @description: Register the adapter to the linked list
+ * @param adapter - adapter device pointer
+ * @return success: 0 , failure: -1
+ */
+int AdapterDeviceRegister(struct Adapter *adapter)
+{
+    if (adapter == NULL)
+        return -1;
+
+    if (AdapterDeviceFindByName(adapter->name) != NULL) {
+        printf("%s: sensor with the same name already registered\n", __func__);
+        return -1;
+    }
+
+    UserMutexObtain(adapter_list_lock, -1);
+    DoubleLinkListInsertNodeAfter(&adapter_list, &adapter->link);
+    UserMutexAbandon(adapter_list_lock);
+
+    return 0;
+}
+
+/**
+ * @description: Unregister the adapter from the linked list
+ * @param adapter - adapter device pointer
+ * @return 0
+ */
+int AdapterDeviceUnregister(struct Adapter *adapter)
+{
+    if (!adapter)
+        return -1;
+    UserMutexObtain(adapter_list, -1);
+    DoubleLinkListRmNode(&adapter->link);
+    UserMutexAbandon(adapter_list);
+
+    return 0;
+}
+
+/**
+ * @description: Open adapter device
+ * @param adapter - adapter device pointer
+ * @return success: 0 , failure: other
+ */
+int AdapterDeviceOpen(struct Adapter *adapter)
+{
+    if (!adapter)
+        return -1;
+
+    int result = 0;
+
+    struct IpProtocolDone *ip_done = NULL;
+    struct PrivProtocolDone *priv_done = NULL;
+
+    switch (adapter->net_protocol)
+    {
+    case PRIVATE_PROTOCOL:
+        priv_done = (struct PrivProtocolDone *)adapter->done;
+        if (priv_done->open == NULL)
+            return 0;
+        
+        result = priv_done->open(adapter);
+        if (result == 0) {
+            printf("Device %s open success.\n", adapter->name);
+        }else{
+            if (adapter->fd) {
+                PrivClose(adapter->fd);
+                adapter->fd = 0;
+            }
+            printf("Device %s open failed(%d).\n", adapter->name, result);
+        }
+        break;
+    
+    case IP_PROTOCOL:
+        ip_done = (struct IpProtocolDone *)adapter->done;
+        if (ip_done->open == NULL)
+            return 0;
+        
+        result = ip_done->open(adapter);
+        if (result == 0) {
+            printf("Device %s open success.\n", adapter->name);
+        }else{
+            if (adapter->fd) {
+                PrivClose(adapter->fd);
+                adapter->fd = 0;
+            }
+            printf("Device %s open failed(%d).\n", adapter->name, result);
+        }
+        break;
+
+    default:
+        break;
+    }
+
+    return result;
+}
+
+/**
+ * @description: Close adapter device
+ * @param adapter - adapter device pointer
+ * @return success: 0 , failure: other
+ */
+int AdapterDeviceClose(struct Adapter *adapter)
+{
+    if (!adapter)
+        return -1;
+
+    int result = 0;
+
+    struct IpProtocolDone *ip_done = NULL;
+    struct PrivProtocolDone *priv_done = NULL;
+
+    switch (adapter->net_protocol)
+    {
+    case PRIVATE_PROTOCOL:
+        priv_done = (struct PrivProtocolDone *)adapter->done;
+        if (priv_done->close == NULL)
+            return 0;
+        
+        result = priv_done->close(adapter);
+        if (result == 0)
+            printf("%s successfully closed.\n", adapter->name);
+        else
+            printf("Closed %s failure.\n", adapter->name);
+
+        break;
+    
+    case IP_PROTOCOL:
+        ip_done = (struct IpProtocolDone *)adapter->done;
+        if (ip_done->close == NULL)
+            return 0;
+        
+        result = ip_done->close(adapter);
+        if (result == 0)
+            printf("%s successfully closed.\n", adapter->name);
+        else
+            printf("Closed %s failure.\n", adapter->name);
+        break;
+
+    default:
+        break;
+    }
+    
+    return result;
+}
+
+/**
+ * @description: Read data from adapter
+ * @param adapter - adapter device pointer
+ * @param dst - buffer to save data
+ * @param len - buffer length
+ * @return gotten data length
+ */
+ssize_t AdapterDeviceRead(struct Adapter *adapter, void *dst, size_t len)
+{
+    if (!adapter)
+        return -1;
+
+    if (adapter->done->read == NULL)
+        return -1;
+    
+    return adapter->done->read(adapter, dst, len);
+}
+
+/**
+ * @description: Write data to adapter
+ * @param adapter - adapter device pointer
+ * @param src - data buffer
+ * @param len - data length
+ * @return length of data written
+ */
+ssize_t AdapterDeviceWrite(struct Adapter *adapter, const void *src, size_t len)
+{
+    if (!adapter)
+        return -1;
+
+    if (adapter->done->write == NULL)
+        return -1;
+    
+    return adapter->done->write(adapter, src, len);
+}
+
+/**
+ * @description: Configure adapter
+ * @param adapter - adapter device pointer
+ * @param cmd - command
+ * @param args - command parameter
+ * @return success: 0 , failure: other
+ */
+int AdapterDeviceControl(struct Adapter *adapter, int cmd, void *args)
+{
+    if (!adapter)
+        return -1;
+
+    if (adapter->done->ioctl == NULL)
+        return -1;
+    
+    return adapter->done->ioctl(adapter, cmd, args);
+}
diff --git a/APP_Framework/Framework/connection/adapter.h b/APP_Framework/Framework/connection/adapter.h
new file mode 100644
index 00000000..54bf24f5
--- /dev/null
+++ b/APP_Framework/Framework/connection/adapter.h
@@ -0,0 +1,120 @@
+/*
+* Copyright (c) 2020 AIIT XUOS Lab
+* XiUOS is licensed under Mulan PSL v2.
+* You can use this software according to the terms and conditions of the Mulan PSL v2.
+* You may obtain a copy of Mulan PSL v2 at:
+*        http://license.coscl.org.cn/MulanPSL2
+* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+* See the Mulan PSL v2 for more details.
+*/
+
+/**
+ * @file adapter.h
+ * @brief Structure and function declarations of the communication adapter framework
+ * @version 1.0
+ * @author AIIT XUOS Lab
+ * @date 2021.05.10
+ */
+
+#ifndef ADAPTER_H
+#define ADAPTER_H
+
+#include <list.h>
+#include <transform.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#define ADAPTER_BUFFSIZE 64
+
+#define ADAPTER_LORA_FUNC       ((uint32_t)(1 << ATAPTER_LORA))
+#define ADAPTER_4G_FUNC         ((uint32_t)(1 << ADAPTER_4G))
+#define ADAPTER_NBIOT_FUNC      ((uint32_t)(1 << ADAPTER_NBIOT))
+#define ADAPTER_WIFI_FUNC       ((uint32_t)(1 << ADAPTER_WIFI))
+#define ADAPTER_ETHERNET_FUNC   ((uint32_t)(1 << ADAPTER_ETHERNET))
+#define ADAPTER_BLUETOOTH_FUNC  ((uint32_t)(1 << ADAPTER_BLUETOOTH))
+#define ADAPTER_ZIGBEE_FUNC     ((uint32_t)(1 << ADAPTER_ZIGBEE))
+#define ADAPTER_5G_FUNC         ((uint32_t)(1 << ADAPTER_5G))
+
+struct Adapter;
+
+struct Socket
+{
+    int id;
+    struct Adapter *adapter;
+};
+
+enum AdapterType
+{
+    ADAPTER_LORA = 0,
+    ADAPTER_4G ,
+    ADAPTER_NBIOT ,
+    ADAPTER_WIFI ,
+    ADAPTER_ETHERNET ,
+    ADAPTER_BLUETOOTH ,
+    ADAPTER_ZIGBEE ,
+    ADAPTER_5G ,
+};
+
+enum NetProtocolType
+{
+    PRIVATE_PROTOCOL = 1,
+    IP_PROTOCOL,
+    PROTOCOL_NONE,
+};
+
+enum NetRoleType
+{
+    CLIENT = 1, 
+    SERVER,
+    ROLE_NONE,
+};
+
+struct AdapterProductInfo
+{
+    uint32_t functions;
+    const char *vendor_name;
+    const char *model_name;
+};
+
+struct IpProtocolDone
+{
+    int (*open)(struct Adapter *adapter);
+    int (*close)(struct Adapter *adapter);
+    int (*ioctl)(struct Adapter *adapter, int cmd, void *args);
+    int (*connect)(struct Adapter *adapter, const char *ip, const char *port, uint8_t ip_type);
+    int (*send)(struct Socket *socket, const void *buf, size_t len);
+    int (*recv)(struct Socket *socket, void *buf, size_t len);
+    int (*disconnect)(struct Socket *socket);
+};
+
+struct PrivProtocolDone
+{
+    int (*open)(struct Adapter *adapter);
+    int (*close)(struct Adapter *adapter);
+    int (*ioctl)(struct Adapter *adapter, int cmd, void *args);
+    int (*join)(struct Adapter *adapter, const char *priv_net_group);
+    int (*send)(struct Adapter *adapter, const void *buf, size_t len);
+    int (*recv)(struct Adapter *adapter, void *buf, size_t len);
+    int (*disconnect)(struct Adapter *adapter);
+};
+
+struct Adapter
+{
+    char *name;
+    int fd;
+
+    struct AdapterProductInfo *info;
+
+    enum NetProtocolType net_protocol;
+    enum NetRoleType net_role;
+
+    char buffer[ADAPTER_BUFFSIZE];
+    
+    void *done;
+
+    struct SysDoubleLinklistNode link;
+};
+
+#endif
\ No newline at end of file
diff --git a/APP_Framework/Framework/transform.c b/APP_Framework/Framework/transform.c
index 5f3dbd0b..6ecaf9a7 100644
--- a/APP_Framework/Framework/transform.c
+++ b/APP_Framework/Framework/transform.c
@@ -38,7 +38,7 @@ int PrivOpen(const char *path, int flags, ...)
     return open(path, flags, ...);
 }
 
-int PrivClose(int fd, void *buf, size_t len)
+int PrivClose(int fd)
 {
     return close(fd);
 }
diff --git a/APP_Framework/Framework/transform.h b/APP_Framework/Framework/transform.h
index f4634d08..fedc04f5 100644
--- a/APP_Framework/Framework/transform.h
+++ b/APP_Framework/Framework/transform.h
@@ -100,7 +100,7 @@ struct PrivIoctlCfg
 
 int PrivOpen(const char *path, int flags, ...);
 
-int PrivClose(int fd, void *buf, size_t len);
+int PrivClose(int fd);
 
 int PrivRead(int fd, void *buf, size_t len);
 
diff --git a/APP_Framework/Kconfig b/APP_Framework/Kconfig
index 0d45a0b5..44075deb 100644
--- a/APP_Framework/Kconfig
+++ b/APP_Framework/Kconfig
@@ -5,6 +5,6 @@ config APP_DIR
     option env="SRC_APP_DIR"
     default "."
 
-source "$APP_DIR/Applications/Kconfig"
+source "$APP_DIR/Framework/Kconfig"
 
 endmenu