diff --git a/board/TencentOS_Tiny_CH32V307_EVB/.cproject b/board/TencentOS_Tiny_CH32V307_EVB/.cproject
index 5985e0dc..76aea57c 100644
--- a/board/TencentOS_Tiny_CH32V307_EVB/.cproject
+++ b/board/TencentOS_Tiny_CH32V307_EVB/.cproject
@@ -62,6 +62,22 @@
 							<tool id="ilg.gnumcueclipse.managedbuild.cross.riscv.tool.c.compiler.1731377187" name="GNU RISC-V Cross C Compiler" superClass="ilg.gnumcueclipse.managedbuild.cross.riscv.tool.c.compiler">
 								<option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="ilg.gnumcueclipse.managedbuild.cross.riscv.option.c.compiler.include.paths.1567947810" name="Include paths (-I)" superClass="ilg.gnumcueclipse.managedbuild.cross.riscv.option.c.compiler.include.paths" useByScannerDiscovery="true" valueType="includePath">
 									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/Debug}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/c-sdk/include}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/c-sdk/include/common}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/c-sdk/include/config}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/c-sdk/include/services/common}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/c-sdk/include/services/explorer}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/c-sdk/common/cryptology/inc}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/c-sdk/common/mqtt_packet/inc}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/c-sdk/common/utils/inc}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/c-sdk/examples}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/c-sdk/platform/network/inc}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/c-sdk/services/explorer/data_template/inc}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/c-sdk/services/explorer/service_mqtt/inc}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/c-sdk/services/common/log_upload/inc}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/c-sdk/services/common/mqtt_client/inc}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/net/sal_module_wrapper}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/devices/esp8266}&quot;"/>
 									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/fs/kv/include}&quot;"/>
 									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/fs/fatfs/include}&quot;"/>
 									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/fs/vfs/include}&quot;"/>
@@ -126,13 +142,19 @@
 						</toolChain>
 					</folderInfo>
 					<sourceEntries>
-						<entry excluding="examples/fatfs_through_vfs_sample.c|User/mqtt_iot_explorer.c|examples/kv_sample.c|fs/fatfs|fs/vfs|fs/kv|components/kv|platform/hal/wch/ch32v30xx|kernel/hal|devices/esp8266_tencent_firmware|net/tencent_firmware_module_wrapper|kernel/core|net/at|kernel|arch|TencentOS-Tiny|Startup|Peripheral|Ld|Debug|Core" flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name=""/>
+						<entry excluding="examples/qcloud_csdk_iot_explorer|c-sdk/services/common|c-sdk/include|examples/mqtt_iot_explorer.c|c-sdk/examples|c-sdk/app|c-sdk/services/explorer|c-sdk/explorer|c-sdk/platform|devices/esp8266|c-sdk/common|net/sal_module_wrapper|examples/fatfs_through_vfs_sample.c|User/mqtt_iot_explorer.c|examples/kv_sample.c|fs/fatfs|fs/vfs|fs/kv|components/kv|platform/hal/wch/ch32v30xx|kernel/hal|devices/esp8266_tencent_firmware|net/tencent_firmware_module_wrapper|kernel/core|net/at|kernel|arch|TencentOS-Tiny|Startup|Peripheral|Ld|Debug|Core" flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name=""/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Core"/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Debug"/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Ld"/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Peripheral"/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Startup"/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="arch"/>
+						<entry excluding="utils/test|mqtt_packet/test|cryptology/test" flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="c-sdk/common"/>
+						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="c-sdk/include"/>
+						<entry excluding="os/Linux" flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="c-sdk/platform"/>
+						<entry excluding="system/test|system/sample|ota/test|ota/sample|mqtt_client/test|mqtt_client/sample|log_upload/test|log_upload/sample|cos/sample|dynreg/test|dynreg/sample|dynreg/src/dynreg.c" flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="c-sdk/services/common"/>
+						<entry excluding="service_mqtt/test|service_mqtt/sample|data_template/test|data_template/sample" flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="c-sdk/services/explorer"/>
+						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="devices/esp8266"/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="devices/esp8266_tencent_firmware"/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="fs/fatfs"/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="fs/kv"/>
@@ -140,6 +162,7 @@
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="kernel/core"/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="kernel/hal"/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="net/at"/>
+						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="net/sal_module_wrapper"/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="net/tencent_firmware_module_wrapper"/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="platform/hal/wch/ch32v30xx"/>
 					</sourceEntries>
diff --git a/board/TencentOS_Tiny_CH32V307_EVB/.project b/board/TencentOS_Tiny_CH32V307_EVB/.project
index 9300f01d..833bfbbd 100644
--- a/board/TencentOS_Tiny_CH32V307_EVB/.project
+++ b/board/TencentOS_Tiny_CH32V307_EVB/.project
@@ -26,11 +26,46 @@
       <type>2</type>
       <locationURI>PARENT-2-PROJECT_LOC/arch/risc-v/risc-v3a</locationURI>
     </link>
+    <link>
+      <name>c-sdk/common</name>
+      <type>2</type>
+      <locationURI>PARENT-2-PROJECT_LOC/components/connectivity/iot-hub-device-c-sdk/common</locationURI>
+    </link>
+    <link>
+      <name>c-sdk/include</name>
+      <type>2</type>
+      <locationURI>PARENT-2-PROJECT_LOC/components/connectivity/iot-hub-device-c-sdk/include</locationURI>
+    </link>
+    <link>
+      <name>c-sdk/platform</name>
+      <type>2</type>
+      <locationURI>PARENT-2-PROJECT_LOC/components/connectivity/iot-hub-device-c-sdk/platform</locationURI>
+    </link>
+    <link>
+      <name>devices/esp8266</name>
+      <type>2</type>
+      <locationURI>PARENT-2-PROJECT_LOC/devices/esp8266</locationURI>
+    </link>
     <link>
       <name>devices/esp8266_tencent_firmware</name>
       <type>2</type>
       <locationURI>PARENT-2-PROJECT_LOC/devices/esp8266_tencent_firmware</locationURI>
     </link>
+    <link>
+      <name>fs/fatfs</name>
+      <type>2</type>
+      <locationURI>PARENT-2-PROJECT_LOC/components/fs/fatfs/wrapper</locationURI>
+    </link>
+    <link>
+      <name>fs/kv</name>
+      <type>2</type>
+      <locationURI>PARENT-2-PROJECT_LOC/components/fs/kv</locationURI>
+    </link>
+    <link>
+      <name>fs/vfs</name>
+      <type>2</type>
+      <locationURI>PARENT-2-PROJECT_LOC/components/fs/vfs</locationURI>
+    </link>
     <link>
       <name>kernel/core</name>
       <type>2</type>
@@ -46,6 +81,11 @@
       <type>2</type>
       <locationURI>PARENT-2-PROJECT_LOC/net/at</locationURI>
     </link>
+    <link>
+      <name>net/sal_module_wrapper</name>
+      <type>2</type>
+      <locationURI>PARENT-2-PROJECT_LOC/net/sal_module_wrapper</locationURI>
+    </link>
     <link>
       <name>net/tencent_firmware_module_wrapper</name>
       <type>2</type>
@@ -57,19 +97,14 @@
       <locationURI>PARENT-2-PROJECT_LOC/platform/hal/wch/ch32v30xx/src</locationURI>
     </link>
     <link>
-      <name>fs/kv</name>
+      <name>c-sdk/services/common</name>
       <type>2</type>
-      <location>PARENT-2-PROJECT_LOC/components/fs/kv</location>
+      <location>PARENT-2-PROJECT_LOC/components/connectivity/iot-hub-device-c-sdk/services/common</location>
     </link>
     <link>
-      <name>fs/vfs</name>
+      <name>c-sdk/services/explorer</name>
       <type>2</type>
-      <location>PARENT-2-PROJECT_LOC/components/fs/vfs</location>
-    </link>
-    <link>
-      <name>fs/fatfs</name>
-      <type>2</type>
-      <location>PARENT-2-PROJECT_LOC/components/fs/fatfs/wrapper</location>
+      <location>PARENT-2-PROJECT_LOC/components/connectivity/iot-hub-device-c-sdk/services/explorer</location>
     </link>
   </linkedResources>
   <filteredResources>
diff --git a/board/TencentOS_Tiny_CH32V307_EVB/TOS_CONFIG/tos_config.h b/board/TencentOS_Tiny_CH32V307_EVB/TOS_CONFIG/tos_config.h
index 1620cccc..0a2b972f 100644
--- a/board/TencentOS_Tiny_CH32V307_EVB/TOS_CONFIG/tos_config.h
+++ b/board/TencentOS_Tiny_CH32V307_EVB/TOS_CONFIG/tos_config.h
@@ -23,7 +23,7 @@
 
 #define TOS_CFG_MMHEAP_DEFAULT_POOL_EN  1u
 
-#define TOS_CFG_MMHEAP_DEFAULT_POOL_SIZE 0x3000
+#define TOS_CFG_MMHEAP_DEFAULT_POOL_SIZE 0x8000
 
 #define TOS_CFG_MAIL_QUEUE_EN           1u
 
diff --git a/board/TencentOS_Tiny_CH32V307_EVB/User/ch32v30x_it.c b/board/TencentOS_Tiny_CH32V307_EVB/User/ch32v30x_it.c
index ee63c836..dea639dc 100644
--- a/board/TencentOS_Tiny_CH32V307_EVB/User/ch32v30x_it.c
+++ b/board/TencentOS_Tiny_CH32V307_EVB/User/ch32v30x_it.c
@@ -9,6 +9,7 @@
 #include "tos_k.h"
 #include "tos_at.h"
 extern at_agent_t esp8266_tf_agent;
+extern at_agent_t esp8266_agent;
 
 void NMI_Handler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
 void HardFault_Handler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
@@ -76,7 +77,7 @@ void UART6_IRQHandler(void)
   if(USART_GetITStatus(UART6, USART_IT_RXNE) != RESET)
   {
       data= USART_ReceiveData(UART6);
-      tos_at_uart_input_byte(&esp8266_tf_agent,data);
+      tos_at_uart_input_byte(&esp8266_agent,data);
 
   }
 
diff --git a/board/TencentOS_Tiny_CH32V307_EVB/User/main.c b/board/TencentOS_Tiny_CH32V307_EVB/User/main.c
index aacec924..906be65e 100644
--- a/board/TencentOS_Tiny_CH32V307_EVB/User/main.c
+++ b/board/TencentOS_Tiny_CH32V307_EVB/User/main.c
@@ -223,40 +223,12 @@ void SD_Card_test(void)
     }
 }
 
-#define TASK1_STK_SIZE       1024
-k_task_t task1;
-__aligned(4) uint8_t task1_stk[TASK1_STK_SIZE];
-
-
-#define TASK2_STK_SIZE       1024
-k_task_t task2;
-__aligned(4) uint8_t task2_stk[TASK2_STK_SIZE];
-
-
 #define APPLICATION_TASK_STK_SIZE       4096
 k_task_t application_task;
 __aligned(4) uint8_t application_task_stk[APPLICATION_TASK_STK_SIZE];
 
 extern void application_entry(void *arg);
 
-void task1_entry(void *arg)
-{
-    while (1)
-    {
-        printf("###I am task1\r\n");
-        tos_task_delay(2000);
-    }
-}
-
-void task2_entry(void *arg)
-{
-    while (1)
-    {
-        printf("***I am task2\r\n");
-        tos_task_delay(1000);
-    }
-}
-
 volatile uint8_t key=0;
 /*******************************************************************************
 * Function Name  : main
@@ -270,17 +242,14 @@ int main(void)
 	USART_Printf_Init(115200);
 	printf("SystemClk:%d\r\n",SystemCoreClock);
 	led_key_init();
-    LCD_Init();//LCD³õʼ»¯
+    LCD_Init();
     SPI_Flash_Init();
     printf("Welcome to TencentOS tiny(%s)\r\n", TOS_VERSION);
     LCD_Fill(0,0,LCD_W,LCD_H,BLACK);
     LCD_ShowString(0,0,"Welcome to TencentOS",WHITE,BLACK,16,0);
 
-
     tos_knl_init();
     tos_task_create(&application_task, "application_task", application_entry, NULL, 4, application_task_stk, APPLICATION_TASK_STK_SIZE, 0);
-    //tos_task_create(&task1, "task1", task1_entry, NULL, 3, task1_stk, TASK1_STK_SIZE, 0); // Create task1
-    //tos_task_create(&task2, "task2", task2_entry, NULL, 3, task2_stk, TASK2_STK_SIZE, 0);// Create task2
     tos_knl_start();
 
     printf("should not run at here!\r\n");
diff --git a/board/TencentOS_Tiny_CH32V307_EVB/examples/hello_world.c b/board/TencentOS_Tiny_CH32V307_EVB/examples/hello_world.c
new file mode 100644
index 00000000..9469956b
--- /dev/null
+++ b/board/TencentOS_Tiny_CH32V307_EVB/examples/hello_world.c
@@ -0,0 +1,34 @@
+#include "tos_k.h"
+
+#define TASK1_STK_SIZE       1024
+k_task_t task1;
+uint8_t task1_stk[TASK1_STK_SIZE];
+
+
+#define TASK2_STK_SIZE       1024
+k_task_t task2;
+uint8_t task2_stk[TASK2_STK_SIZE];
+
+void task1_entry(void *arg)
+{
+    while (1) {
+        printf("###I am task1\r\n");
+        tos_task_delay(2000);
+    }
+}
+
+void task2_entry(void *arg)
+{
+    while (1) {
+        printf("***I am task2\r\n");
+        tos_task_delay(1000);
+    }
+}
+
+
+void application_entry(void *arg)
+{
+    tos_task_create(&task1, "task1", task1_entry, NULL, 3, task1_stk, TASK1_STK_SIZE, 0); // Create task1
+    tos_task_create(&task2, "task2", task2_entry, NULL, 3, task2_stk, TASK2_STK_SIZE, 0);// Create task2
+}
+
diff --git a/board/TencentOS_Tiny_CH32V307_EVB/examples/qcloud_csdk_iot_explorer/data_template_app.c b/board/TencentOS_Tiny_CH32V307_EVB/examples/qcloud_csdk_iot_explorer/data_template_app.c
new file mode 100644
index 00000000..f7a98ef3
--- /dev/null
+++ b/board/TencentOS_Tiny_CH32V307_EVB/examples/qcloud_csdk_iot_explorer/data_template_app.c
@@ -0,0 +1,326 @@
+/**
+ * @copyright
+ *
+ * Tencent is pleased to support the open source community by making IoT Hub available.
+ * Copyright(C) 2018 - 2021 THL A29 Limited, a Tencent company.All rights reserved.
+ *
+ * Licensed under the MIT License(the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://opensource.org/licenses/MIT
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is
+ * distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * @file data_template_sample.c
+ * @brief
+ * @author fancyxu (fancyxu@tencent.com)
+ * @version 1.0
+ * @date 2021-09-27
+ *
+ * @par Change Log:
+ * <table>
+ * <tr><th>Date       <th>Version <th>Author    <th>Description
+ * <tr><td>2021-09-27 <td>1.0     <td>fancyxu   <td>first commit
+ * </table>
+ */
+
+#include "qcloud_iot_common.h"
+#include "qcloud_iot_explorer.h"
+#include "data_template_config.h"
+
+#include "utils_log.h"
+
+#include "esp8266.h"
+
+/**
+ * @brief MQTT event callback, @see MQTTEventHandleFun
+ *
+ * @param[in] client pointer to mqtt client
+ * @param[in] handle_context context
+ * @param[in] msg msg
+ */
+static void _mqtt_event_handler(void *client, void *handle_context, MQTTEventMsg *msg)
+{
+    MQTTMessage *mqtt_message = (MQTTMessage *)msg->msg;
+    uintptr_t    packet_id    = (uintptr_t)msg->msg;
+
+    switch (msg->event_type) {
+        case MQTT_EVENT_UNDEF:
+            Log_i("undefined event occur.");
+            break;
+
+        case MQTT_EVENT_DISCONNECT:
+            Log_i("MQTT disconnect.");
+            break;
+
+        case MQTT_EVENT_RECONNECT:
+            Log_i("MQTT reconnect.");
+            break;
+
+        case MQTT_EVENT_PUBLISH_RECEIVED:
+            Log_i("topic message arrived but without any related handle: topic=%.*s, topic_msg=%.*s",
+                  mqtt_message->topic_len, STRING_PTR_PRINT_SANITY_CHECK(mqtt_message->topic_name),
+                  mqtt_message->payload_len, STRING_PTR_PRINT_SANITY_CHECK((char *)mqtt_message->payload));
+            break;
+
+        case MQTT_EVENT_SUBSCRIBE_SUCCESS:
+            Log_i("subscribe success, packet-id=%u", (unsigned int)packet_id);
+            break;
+
+        case MQTT_EVENT_SUBSCRIBE_TIMEOUT:
+            Log_i("subscribe wait ack timeout, packet-id=%u", (unsigned int)packet_id);
+            break;
+
+        case MQTT_EVENT_SUBSCRIBE_NACK:
+            Log_i("subscribe nack, packet-id=%u", (unsigned int)packet_id);
+            break;
+
+        case MQTT_EVENT_UNSUBSCRIBE_SUCCESS:
+            Log_i("unsubscribe success, packet-id=%u", (unsigned int)packet_id);
+            break;
+
+        case MQTT_EVENT_UNSUBSCRIBE_TIMEOUT:
+            Log_i("unsubscribe timeout, packet-id=%u", (unsigned int)packet_id);
+            break;
+
+        case MQTT_EVENT_UNSUBSCRIBE_NACK:
+            Log_i("unsubscribe nack, packet-id=%u", (unsigned int)packet_id);
+            break;
+
+        case MQTT_EVENT_PUBLISH_SUCCESS:
+            Log_i("publish success, packet-id=%u", (unsigned int)packet_id);
+            break;
+
+        case MQTT_EVENT_PUBLISH_TIMEOUT:
+            Log_i("publish timeout, packet-id=%u", (unsigned int)packet_id);
+            break;
+
+        case MQTT_EVENT_PUBLISH_NACK:
+            Log_i("publish nack, packet-id=%u", (unsigned int)packet_id);
+            break;
+
+        default:
+            Log_i("Should NOT arrive here.");
+            break;
+    }
+}
+
+/**
+ * @brief Setup MQTT construct parameters.
+ *
+ * @param[in,out] initParams @see MQTTInitParams
+ * @param[in] device_info @see DeviceInfo
+ */
+static void _setup_connect_init_params(MQTTInitParams *init_params, DeviceInfo *device_info)
+{
+    init_params->device_info            = device_info;
+    init_params->command_timeout        = QCLOUD_IOT_MQTT_COMMAND_TIMEOUT;
+    init_params->keep_alive_interval_ms = QCLOUD_IOT_MQTT_KEEP_ALIVE_INTERNAL;
+    init_params->auto_connect_enable    = 1;
+    init_params->event_handle.h_fp      = _mqtt_event_handler;
+    init_params->event_handle.context   = NULL;
+}
+
+// ----------------------------------------------------------------------------
+// Data template callback
+// ----------------------------------------------------------------------------
+
+static void _method_control_callback(UtilsJsonValue client_token, UtilsJsonValue params, void *usr_data)
+{
+    char buf[256];
+    Log_i("recv msg[%.*s]: params=%.*s", client_token.value_len, client_token.value, params.value_len, params.value);
+    IOT_DataTemplate_PropertyControlReply(usr_data, buf, sizeof(buf), 0, client_token);
+    usr_data_template_property_parse(params);
+}
+
+static void _method_get_status_reply_callback(UtilsJsonValue client_token, int code, UtilsJsonValue reported,
+                                              UtilsJsonValue control, void *usr_data)
+{
+    char buf[256];
+    Log_i("recv msg[%.*s]: code=%d|reported=%.*s|control=%.*s", client_token.value_len, client_token.value, code,
+          reported.value_len, STRING_PTR_PRINT_SANITY_CHECK(reported.value), control.value_len,
+          STRING_PTR_PRINT_SANITY_CHECK(control.value));
+    usr_data_template_property_parse(control);
+    IOT_DataTemplate_PropertyClearControl(usr_data, buf, sizeof(buf));
+}
+
+static void _method_action_callback(UtilsJsonValue client_token, UtilsJsonValue action_id, UtilsJsonValue params,
+                                    void *usr_data)
+{
+    UsrActionIndex            index;
+    int                       rc;
+    DataTemplatePropertyValue value_time, value_color, value_total_time;
+
+    char buf[256];
+
+    Log_i("recv msg[%.*s]: action_id=%.*s|params=%.*s", client_token.value_len, client_token.value, action_id.value_len,
+          action_id.value, params.value_len, params.value);
+
+    rc = usr_data_template_action_parse(action_id, params, &index);
+    if (rc) {
+        return;
+    }
+
+    switch (index) {
+        case USR_ACTION_INDEX_LIGHT_BLINK:
+            value_time       = usr_data_template_action_input_value_get(USR_ACTION_INDEX_LIGHT_BLINK,
+                                                                        USR_ACTION_LIGHT_BLINK_INPUT_INDEX_TIME);
+            value_color      = usr_data_template_action_input_value_get(USR_ACTION_INDEX_LIGHT_BLINK,
+                                                                        USR_ACTION_LIGHT_BLINK_INPUT_INDEX_COLOR);
+            value_total_time = usr_data_template_action_input_value_get(USR_ACTION_INDEX_LIGHT_BLINK,
+                                                                        USR_ACTION_LIGHT_BLINK_INPUT_INDEX_TOTAL_TIME);
+            Log_i("light[%d] blink %d every %d s ", value_color.value_enum, value_time.value_int,
+                  value_total_time.value_int);
+            usr_data_template_action_reply(usr_data, buf, sizeof(buf), index, client_token, 0, "{\"err_code\":0}");
+            break;
+        default:
+            break;
+    }
+}
+
+// ----------------------------------------------------------------------------
+// Data template upstream
+// ----------------------------------------------------------------------------
+
+/**
+ * @brief Report status.
+ *
+ * @param[in,out] client pointer to mqtt client
+ */
+static void _cycle_report(void *client)
+{
+    static int lightness = 0;
+    char         buf[256];
+    static Timer sg_cycle_report_timer;
+    DataTemplatePropertyValue property_value;
+    
+    if (HAL_Timer_Expired(&sg_cycle_report_timer)) {
+        usr_data_template_event_post(client, buf, sizeof(buf), USR_EVENT_INDEX_STATUS_REPORT,
+                                     "{\"status\":0,\"message\":\"ok\"}");
+        
+        property_value.value_int = lightness;
+        if (++lightness > 100) {
+            lightness = 0;
+        }
+        usr_data_template_property_value_set(USR_PROPERTY_INDEX_BRIGHTNESS, property_value);
+        HAL_Timer_Countdown(&sg_cycle_report_timer, 10);
+    }
+}
+
+/**
+ * @brief Init usr data template and data.
+ *
+ */
+static void _usr_init(void)
+{
+    usr_data_template_init();
+
+    DataTemplatePropertyValue value;
+    value.value_int = 0;
+    usr_data_template_property_value_set(USR_PROPERTY_INDEX_POWER_SWITCH, value);
+    value.value_enum = 0;
+    usr_data_template_property_value_set(USR_PROPERTY_INDEX_COLOR, value);
+    value.value_int = 10;
+    usr_data_template_property_value_set(USR_PROPERTY_INDEX_BRIGHTNESS, value);
+    value.value_string = "light";
+    usr_data_template_property_value_set(USR_PROPERTY_INDEX_NAME, value);
+    value.value_int = 30;
+    usr_data_template_property_struct_value_set(USR_PROPERTY_INDEX_POSITION, USR_PROPERTY_POSITION_INDEX_LONGITUDE,
+                                                value);
+    value.value_int = 30;
+    usr_data_template_property_struct_value_set(USR_PROPERTY_INDEX_POSITION, USR_PROPERTY_POSITION_INDEX_LATITUDE,
+                                                value);
+    value.value_string = "high";
+    usr_data_template_property_value_set(USR_PROPERTY_INDEX_POWER, value);
+}
+
+// ----------------------------------------------------------------------------
+// Main
+// ----------------------------------------------------------------------------
+
+int data_template_app()
+{
+    int rc;
+    char buf[1024];
+
+    // init log level
+    LogHandleFunc func = {0};
+
+    func.log_malloc               = HAL_Malloc;
+    func.log_free                 = HAL_Free;
+    func.log_get_current_time_str = HAL_Timer_Current;
+    func.log_printf               = HAL_Printf;
+    utils_log_init(func, LOG_LEVEL_INFO, 2048);
+
+    DeviceInfo device_info;
+
+    rc = HAL_GetDevInfo((void *)&device_info);
+    if (rc) {
+        Log_e("get device info failed: %d", rc);
+        return rc;
+    }
+
+    _usr_init();
+
+    // init connection
+    MQTTInitParams init_params = DEFAULT_MQTT_INIT_PARAMS;
+    _setup_connect_init_params(&init_params, &device_info);
+
+    // create MQTT client and connect with server
+    void *client = IOT_MQTT_Construct(&init_params);
+    if (client) {
+        Log_i("Cloud Device Construct Success");
+    } else {
+        Log_e("MQTT Construct failed!");
+        return QCLOUD_ERR_FAILURE;
+    }
+
+    // subscribe normal topics and wait result
+    IotDataTemplateCallback callback                            = DEFAULT_DATA_TEMPLATE_CALLBACK;
+    callback.property_callback.method_control_callback          = _method_control_callback;
+    callback.property_callback.method_get_status_reply_callback = _method_get_status_reply_callback;
+    callback.action_callback.method_action_callback             = _method_action_callback;
+
+    rc = IOT_DataTemplate_Init(client, callback, client);
+    if (rc) {
+        Log_e("Client Subscribe Topic Failed: %d", rc);
+        return rc;
+    }
+
+    IOT_DataTemplate_PropertyGetStatus(client, buf, sizeof(buf));
+
+    while (1) {
+        rc = IOT_MQTT_Yield(client, QCLOUD_IOT_MQTT_YIELD_TIMEOUT);
+        switch (rc) {
+            case QCLOUD_RET_SUCCESS:
+                break;
+            case QCLOUD_ERR_MQTT_ATTEMPTING_RECONNECT:
+                continue;
+            case QCLOUD_RET_MQTT_RECONNECTED:
+                IOT_DataTemplate_PropertyGetStatus(client, buf, sizeof(buf));
+                break;
+            default:
+                Log_e("Exit loop caused of errCode:%d", rc);
+                goto exit;
+        }
+        _cycle_report(client);
+        usr_data_template_property_report(client, buf, sizeof(buf));
+    }
+
+exit:
+    IOT_DataTemplate_Deinit(client);
+    rc |= IOT_MQTT_Destroy(&client);
+    utils_log_deinit();
+    return rc;
+}
+
+void application_entry(void *arg)
+{ 
+    esp8266_sal_init(HAL_UART_PORT_6);
+    
+    esp8266_join_ap("Mculover666", "mculover666");
+    
+    data_template_app();
+}
diff --git a/board/TencentOS_Tiny_CH32V307_EVB/examples/qcloud_csdk_iot_explorer/data_template_config.c b/board/TencentOS_Tiny_CH32V307_EVB/examples/qcloud_csdk_iot_explorer/data_template_config.c
new file mode 100644
index 00000000..5377cf87
--- /dev/null
+++ b/board/TencentOS_Tiny_CH32V307_EVB/examples/qcloud_csdk_iot_explorer/data_template_config.c
@@ -0,0 +1,494 @@
+/**
+ * @copyright
+ *
+ * Tencent is pleased to support the open source community by making IoT Hub available.
+ * Copyright(C) 2018 - 2021 THL A29 Limited, a Tencent company.All rights reserved.
+ *
+ * Licensed under the MIT License(the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://opensource.org/licenses/MIT
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is
+ * distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * @file data_template_config.c
+ * @brief
+ * @author fancyxu (fancyxu@tencent.com)
+ * @version 1.0
+ * @date 2021-10-09
+ *
+ * @par Change Log:
+ * <table>
+ * <tr><th>Date       <th>Version <th>Author    <th>Description
+ * <tr><td>2021-10-09 <td>1.0     <td>fancyxu   <td>first commit
+ * </table>
+ */
+
+#include "data_template_config.h"
+
+/**
+ * @brief Set property value.
+ *
+ * @param[in,out] property pointer to property
+ * @param[in] value value to set, should match with property type
+ * @return 0 for success.
+ */
+static int _set_property_value(DataTemplateProperty* property, UtilsJsonValue value)
+{
+    int i, rc = 0;
+
+    switch (property->type) {
+        case DATA_TEMPLATE_TYPE_INT:
+        case DATA_TEMPLATE_TYPE_ENUM:
+        case DATA_TEMPLATE_TYPE_BOOL:
+            return utils_json_value_data_get(value, UTILS_JSON_VALUE_TYPE_INT32, &property->value.value_int);
+        case DATA_TEMPLATE_TYPE_TIME:
+            return utils_json_value_data_get(value, UTILS_JSON_VALUE_TYPE_UINT32, &property->value.value_time);
+        case DATA_TEMPLATE_TYPE_STRING:
+        case DATA_TEMPLATE_TYPE_STRING_ENUM:
+            if (!property->value.value_string) {  // no need copy
+                return 0;
+            }
+            strncpy(property->value.value_string, value.value, value.value_len);
+            property->value.value_string[value.value_len] = '\0';
+            return 0;
+        case DATA_TEMPLATE_TYPE_FLOAT:
+            return utils_json_value_data_get(value, UTILS_JSON_VALUE_TYPE_FLOAT, &property->value.value_float);
+        case DATA_TEMPLATE_TYPE_STRUCT:
+            for (i = 0; i < property->value.value_struct.count; i++) {
+                rc |= _set_property_value(property->value.value_struct.property + i, value);
+            }
+            return rc;
+        case DATA_TEMPLATE_TYPE_ARRAY:
+            Log_e("array type is not supportted yet!");
+            return -1;
+        default:
+            Log_e("unkown type!");
+            return -1;
+    }
+}
+
+/**
+ * @brief Get property node in json.
+ *
+ * @param[out] json_buf buffer to put node
+ * @param[in] buf_len buffer length
+ * @param[in] property property to get node
+ * @return 0 for success.
+ */
+static int _get_property_node(char* json_buf, int buf_len, const DataTemplateProperty* property)
+{
+    int len, i;
+    switch (property->type) {
+        case DATA_TEMPLATE_TYPE_INT:
+        case DATA_TEMPLATE_TYPE_ENUM:
+        case DATA_TEMPLATE_TYPE_BOOL:
+            return HAL_Snprintf(json_buf, buf_len, "\"%s\":%d", property->key, property->value.value_int);
+        case DATA_TEMPLATE_TYPE_TIME:
+            return HAL_Snprintf(json_buf, buf_len, "\"%s\":%u", property->key, property->value.value_time);
+        case DATA_TEMPLATE_TYPE_STRING:
+        case DATA_TEMPLATE_TYPE_STRING_ENUM:
+            if (!property->value.value_string) {
+                return 0;
+            }
+            return HAL_Snprintf(json_buf, buf_len, "\"%s\":\"%s\"", property->key, property->value.value_string);
+        case DATA_TEMPLATE_TYPE_FLOAT:
+            return HAL_Snprintf(json_buf, buf_len, "\"%s\":%f", property->key, property->value.value_float);
+        case DATA_TEMPLATE_TYPE_STRUCT:
+            len = HAL_Snprintf(json_buf, buf_len, "\"%s\":{", property->key);
+            for (i = 0; i < property->value.value_struct.count; i++) {
+                len += _get_property_node(json_buf + len, buf_len - len, property->value.value_struct.property + i);
+                json_buf[len++] = ',';
+            }
+            json_buf[--len] = '}';
+            return len + 1;
+        case DATA_TEMPLATE_TYPE_ARRAY:
+            Log_e("array type is not supportted yet!");
+            return -1;
+        default:
+            Log_e("unkown type!");
+            return -1;
+    }
+}
+
+/**
+ * @brief Parse property array.
+ *
+ * @param[in] json_buf json string to parse
+ * @param[in] buf_len json len
+ * @param[in,out] properties pointer to property array
+ * @param[in] property_count count of property
+ */
+static void _parse_property_array(const char* json_buf, int buf_len, DataTemplateProperty* properties,
+                                  int property_count)
+{
+    DataTemplateProperty* property;
+    UtilsJsonValue        value;
+    for (int i = 0; i < property_count; i++) {
+        property = &properties[i];
+        if (!utils_json_value_get(property->key, strlen(property->key), json_buf, buf_len, &value)) {
+            property->need_report = !_set_property_value(property, value);
+        }
+    }
+}
+
+/**************************************************************************************
+ * user property
+ **************************************************************************************/
+
+#define TOTAL_USR_PROPERTY_COUNT 6
+
+static DataTemplateProperty sg_usr_data_template_property[TOTAL_USR_PROPERTY_COUNT];
+
+#define TOTAL_USR_PROPERTY_STRUCT_POSITION_COUNT 2
+
+static DataTemplateProperty sg_usr_property_position[TOTAL_USR_PROPERTY_STRUCT_POSITION_COUNT];
+
+static void _init_data_template_property_position(void)
+{
+    sg_usr_property_position[USR_PROPERTY_POSITION_INDEX_LONGITUDE].value.value_int = 0;
+    sg_usr_property_position[USR_PROPERTY_POSITION_INDEX_LONGITUDE].key             = "longitude";
+    sg_usr_property_position[USR_PROPERTY_POSITION_INDEX_LONGITUDE].type            = DATA_TEMPLATE_TYPE_INT;
+
+    sg_usr_property_position[USR_PROPERTY_POSITION_INDEX_LATITUDE].value.value_int = 0;
+    sg_usr_property_position[USR_PROPERTY_POSITION_INDEX_LATITUDE].key             = "latitude";
+    sg_usr_property_position[USR_PROPERTY_POSITION_INDEX_LATITUDE].type            = DATA_TEMPLATE_TYPE_INT;
+}
+
+static void _init_data_template_property(void)
+{
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_POWER_SWITCH].value.value_bool = 0;
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_POWER_SWITCH].key              = "power_switch";
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_POWER_SWITCH].type             = DATA_TEMPLATE_TYPE_BOOL;
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_POWER_SWITCH].need_report      = 1;
+
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_COLOR].value.value_enum = 0;
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_COLOR].key              = "color";
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_COLOR].type             = DATA_TEMPLATE_TYPE_ENUM;
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_COLOR].need_report      = 1;
+
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_BRIGHTNESS].value.value_int = 0;
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_BRIGHTNESS].key             = "brightness";
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_BRIGHTNESS].type            = DATA_TEMPLATE_TYPE_INT;
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_BRIGHTNESS].need_report     = 1;
+
+    static char sg_usr_property_name[64 + 1];
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_NAME].value.value_string = sg_usr_property_name;
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_NAME].key                = "name";
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_NAME].type               = DATA_TEMPLATE_TYPE_STRING;
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_NAME].need_report        = 1;
+
+    _init_data_template_property_position();
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_POSITION].value.value_struct.property = sg_usr_property_position;
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_POSITION].value.value_struct.count =
+        TOTAL_USR_PROPERTY_STRUCT_POSITION_COUNT;
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_POSITION].key         = "position";
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_POSITION].type        = DATA_TEMPLATE_TYPE_STRUCT;
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_POSITION].need_report = 1;
+
+    static char sg_usr_property_power[64 + 1];
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_POWER].value.value_string_enum = sg_usr_property_power;
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_POWER].key                     = "power";
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_POWER].type                    = DATA_TEMPLATE_TYPE_STRING_ENUM;
+    sg_usr_data_template_property[USR_PROPERTY_INDEX_POWER].need_report             = 1;
+}
+
+/**************************************************************************************
+ * user event
+ **************************************************************************************/
+
+#define TOTAL_USR_EVENT_COUNT 3
+
+DataTemplateEvent sg_usr_data_template_event[TOTAL_USR_EVENT_COUNT];
+
+/**
+ * @brief Sample of event post params.
+ *
+ */
+static const char* sg_usr_event_status_report_params  = "{\"status\":0,\"message\":\"ok\"}";
+static const char* sg_usr_event_low_voltage_params    = "{\"voltage\":1.0}";
+static const char* sg_usr_event_hardware_fault_params = "{\"name\":\"broken\",\"error_code\":-1}";
+
+static void _init_data_template_event(void)
+{
+    sg_usr_data_template_event[USR_EVENT_INDEX_STATUS_REPORT].event_id = "status_report";
+    sg_usr_data_template_event[USR_EVENT_INDEX_STATUS_REPORT].type     = IOT_DATA_TEMPLATE_EVENT_TYPE_INFO;
+    sg_usr_data_template_event[USR_EVENT_INDEX_STATUS_REPORT].params   = sg_usr_event_status_report_params;
+
+    sg_usr_data_template_event[USR_EVENT_INDEX_LOW_VOLTAGE].event_id = "low_voltage";
+    sg_usr_data_template_event[USR_EVENT_INDEX_LOW_VOLTAGE].type     = IOT_DATA_TEMPLATE_EVENT_TYPE_ALERT;
+    sg_usr_data_template_event[USR_EVENT_INDEX_LOW_VOLTAGE].params   = sg_usr_event_low_voltage_params;
+
+    sg_usr_data_template_event[USR_EVENT_INDEX_HARDWARE_FAULT].event_id = "hardware_fault";
+    sg_usr_data_template_event[USR_EVENT_INDEX_HARDWARE_FAULT].type     = IOT_DATA_TEMPLATE_EVENT_TYPE_FAULT;
+    sg_usr_data_template_event[USR_EVENT_INDEX_HARDWARE_FAULT].params   = sg_usr_event_hardware_fault_params;
+}
+
+/**************************************************************************************
+ * user action
+ **************************************************************************************/
+
+#define TOTAL_USR_ACTION_COUNT 1
+
+DataTemplateAction sg_usr_data_template_action[TOTAL_USR_ACTION_COUNT];
+
+#define TOTAL_USR_ACTION_LIGHT_BLINK_INPUT_PARAMS_COUNT 3
+
+static DataTemplateProperty sg_usr_action_light_blink_input[TOTAL_USR_ACTION_LIGHT_BLINK_INPUT_PARAMS_COUNT];
+
+static void _init_data_template_action_light_blink_input(void)
+{
+    sg_usr_action_light_blink_input[USR_ACTION_LIGHT_BLINK_INPUT_INDEX_TIME].value.value_int = 0;
+    sg_usr_action_light_blink_input[USR_ACTION_LIGHT_BLINK_INPUT_INDEX_TIME].key             = "time";
+    sg_usr_action_light_blink_input[USR_ACTION_LIGHT_BLINK_INPUT_INDEX_TIME].type            = DATA_TEMPLATE_TYPE_INT;
+
+    sg_usr_action_light_blink_input[USR_ACTION_LIGHT_BLINK_INPUT_INDEX_COLOR].value.value_int = 0;
+    sg_usr_action_light_blink_input[USR_ACTION_LIGHT_BLINK_INPUT_INDEX_COLOR].key             = "color";
+    sg_usr_action_light_blink_input[USR_ACTION_LIGHT_BLINK_INPUT_INDEX_COLOR].type            = DATA_TEMPLATE_TYPE_ENUM;
+
+    sg_usr_action_light_blink_input[USR_ACTION_LIGHT_BLINK_INPUT_INDEX_TOTAL_TIME].value.value_int = 0;
+    sg_usr_action_light_blink_input[USR_ACTION_LIGHT_BLINK_INPUT_INDEX_TOTAL_TIME].key             = "total_time";
+    sg_usr_action_light_blink_input[USR_ACTION_LIGHT_BLINK_INPUT_INDEX_TOTAL_TIME].type = DATA_TEMPLATE_TYPE_INT;
+}
+
+/**
+ * @brief Sample of action reply.
+ *
+ */
+static IotDataTemplateActionReply sg_usr_action_light_blink_reply = {
+    .code         = 0,
+    .client_token = {.value = "test", .value_len = 4},
+    .response     = "{\"err_code\":0}",
+};
+
+static void _init_data_template_action(void)
+{
+    _init_data_template_action_light_blink_input();
+    sg_usr_data_template_action[USR_ACTION_INDEX_LIGHT_BLINK].action_id = "light_blink";
+    sg_usr_data_template_action[USR_ACTION_INDEX_LIGHT_BLINK].input_struct.value_struct.property =
+        sg_usr_action_light_blink_input;
+    sg_usr_data_template_action[USR_ACTION_INDEX_LIGHT_BLINK].input_struct.value_struct.count =
+        TOTAL_USR_ACTION_LIGHT_BLINK_INPUT_PARAMS_COUNT;
+    sg_usr_data_template_action[USR_ACTION_INDEX_LIGHT_BLINK].reply = sg_usr_action_light_blink_reply;
+}
+
+/**************************************************************************************
+ * API
+ **************************************************************************************/
+
+/**
+ * @brief Init user data template(property/event/action).
+ *
+ */
+void usr_data_template_init(void)
+{
+    _init_data_template_property();
+    _init_data_template_event();
+    _init_data_template_action();
+}
+
+/**
+ * @brief Get property value.
+ *
+ * @param[in] index @see UsrPropertyIndex
+ * @return @see DataTemplatePropertyValue
+ */
+DataTemplatePropertyValue usr_data_template_property_value_get(UsrPropertyIndex index)
+{
+    return sg_usr_data_template_property[index].value;
+}
+
+/**
+ * @brief Set property value.
+ *
+ * @param[in] index @see UsrPropertyIndex
+ * @param[in] value @see DataTemplatePropertyValue, @note value should match property type.
+ */
+void usr_data_template_property_value_set(UsrPropertyIndex index, DataTemplatePropertyValue value)
+{
+    if (sg_usr_data_template_property[index].type == DATA_TEMPLATE_TYPE_STRING ||
+        sg_usr_data_template_property[index].type == DATA_TEMPLATE_TYPE_STRING_ENUM) {
+        strncpy(sg_usr_data_template_property[index].value.value_string, value.value_string,
+                strlen(value.value_string));
+    }
+    sg_usr_data_template_property[index].value       = value;
+    sg_usr_data_template_property[index].need_report = 1;
+}
+
+/**
+ * @brief Get property(struct) value.
+ *
+ * @param[in] struct_index @see UsrPropertyIndex, @note DATA_TEMPLATE_TYPE_STRUCT is required here.
+ * @param[in] property_index depends on which struct
+ * @return @see DataTemplatePropertyValue
+ */
+DataTemplatePropertyValue usr_data_template_property_struct_value_get(UsrPropertyIndex struct_index, int property_index)
+{
+    return sg_usr_data_template_property[struct_index].value.value_struct.property[property_index].value;
+}
+
+/**
+ * @brief Set property(struct) value.
+ *
+ * @param[in] struct_index @see UsrPropertyIndex, @note DATA_TEMPLATE_TYPE_STRUCT is required here.
+ * @param[in] property_index depends on which struct
+ * @param[in] value  @see DataTemplatePropertyValue, @note value should match property type.
+ */
+void usr_data_template_property_struct_value_set(UsrPropertyIndex struct_index, int property_index,
+                                                 DataTemplatePropertyValue value)
+{
+    if (sg_usr_data_template_property[struct_index].value.value_struct.property[property_index].type ==
+            DATA_TEMPLATE_TYPE_STRING ||
+        sg_usr_data_template_property[struct_index].value.value_struct.property[property_index].type ==
+            DATA_TEMPLATE_TYPE_STRING_ENUM) {
+        strncpy(
+            sg_usr_data_template_property[struct_index].value.value_struct.property[property_index].value.value_string,
+            value.value_string, strlen(value.value_string));
+    }
+    sg_usr_data_template_property[struct_index].need_report = 1;
+}
+
+/**
+ * @brief Parse control message and set property value.
+ *
+ * @param[in] params params filed of control message
+ */
+void usr_data_template_property_parse(UtilsJsonValue params)
+{
+    _parse_property_array(params.value, params.value_len, sg_usr_data_template_property, TOTAL_USR_PROPERTY_COUNT);
+}
+
+/**
+ * @brief Get property status.
+ *
+ * @param[in] index @see UsrPropertyIndex
+ * @return need_report
+ */
+int usr_data_template_property_status_get(UsrPropertyIndex index)
+{
+    return sg_usr_data_template_property[index].need_report;
+}
+
+/**
+ * @brief Report all the properties needed report.
+ *
+ * @param[in,out] client pointer to mqtt client
+ * @param[in] buf buffer to report
+ * @param[in] buf_len buffer length
+ * @return packet id (>=0) when success, or err code (<0) @see IotReturnCode
+ */
+int usr_data_template_property_report(void* client, char* buf, int buf_len)
+{
+    char params[512];
+    memset(params, 0, sizeof(params));
+    params[0]  = '{';
+    int offset = 1;
+    for (int i = 0; i < TOTAL_USR_PROPERTY_COUNT; i++) {
+        DataTemplateProperty* property = &sg_usr_data_template_property[i];
+        if (property->need_report) {
+            offset += _get_property_node(params + offset, sizeof(params) - offset, property);
+            if (offset > 0) {
+                params[offset++] = ',';
+            }
+            property->need_report = 0;
+        }
+    }
+
+    if (offset > 0) {
+        params[--offset] = '}';
+        return IOT_DataTemplate_PropertyReport(client, buf, buf_len, params);
+    }
+    return QCLOUD_RET_SUCCESS;
+}
+
+/**
+ * @brief Post event.
+ *
+ * @param[in,out] client pointer to mqtt client
+ * @param[in] buf buffer to report
+ * @param[in] buf_len buffer length
+ * @param[in] id @see UsrEventIndex
+ * @param[in] params user should construct params according to event.
+ */
+void usr_data_template_event_post(void* client, char* buf, int buf_len, UsrEventIndex id, const char* params)
+{
+    if (params) {
+        sg_usr_data_template_event[id].params = params;
+    }
+    IOT_DataTemplate_EventPost(client, buf, buf_len, sg_usr_data_template_event[id]);
+}
+
+/**
+ * @brief Parse action message and set action input params.
+ *
+ * @param[in] action_id action id
+ * @param[in] params params of action
+ * @param[out] index @see UsrActionIndex
+ * @return 0 for success, QCLOUD_ERR_JSON_PARSE for invalid json.
+ */
+int usr_data_template_action_parse(UtilsJsonValue action_id, UtilsJsonValue params, UsrActionIndex* index)
+{
+    DataTemplateProperty* property;
+
+    int input_property_count;
+
+    for (int i = 0; i < TOTAL_USR_ACTION_COUNT; i++) {
+        if (!strncmp(action_id.value, sg_usr_data_template_action[i].action_id, action_id.value_len)) {
+            property             = sg_usr_data_template_action[i].input_struct.value_struct.property;
+            input_property_count = sg_usr_data_template_action[i].input_struct.value_struct.count;
+
+            // 1. reset need report
+            for (int j = 0; j < input_property_count; j++) {
+                property[j].need_report = 0;
+            }
+
+            // 2. parse
+            _parse_property_array(params.value, params.value_len, property, input_property_count);
+
+            // 3. check all the input params is set
+            for (int j = 0; j < input_property_count; j++) {
+                if (!property[j].need_report) {
+                    return QCLOUD_ERR_JSON_PARSE;
+                }
+            }
+            *index = i;
+            return QCLOUD_RET_SUCCESS;
+        }
+    }
+    return QCLOUD_ERR_JSON_PARSE;
+}
+
+/**
+ * @brief Get input value, should call after usr_data_template_action_parse
+ *
+ * @param[in] index index get from usr_data_template_action_parse
+ * @param[in] property_index property index of action input params
+ * @return @see DataTemplatePropertyValue
+ */
+DataTemplatePropertyValue usr_data_template_action_input_value_get(UsrActionIndex index, int property_index)
+{
+    return sg_usr_data_template_action[index].input_struct.value_struct.property[property_index].value;
+}
+
+/**
+ * @brief Reply action, should call after parse action message.
+ *
+ * @param[in,out] client pointer to mqtt client
+ * @param[in] buf buffer to report
+ * @param[in] buf_len buffer length
+ * @param[in] index @see UsrActionIndex
+ * @param[in] client_token client token of action message
+ * @param[in] code result code for action, 0 for success
+ * @param[in] response action output params, user should construct params according to action
+ * @return packet id (>=0) when success, or err code (<0) @see IotReturnCode
+ */
+int usr_data_template_action_reply(void* client, char* buf, int buf_len, UsrActionIndex index,
+                                   UtilsJsonValue client_token, int code, const char* response)
+{
+    sg_usr_data_template_action[index].reply.code         = code;
+    sg_usr_data_template_action[index].reply.client_token = client_token;
+    sg_usr_data_template_action[index].reply.response     = response;
+    return IOT_DataTemplate_ActionReply(client, buf, buf_len, sg_usr_data_template_action[index].reply);
+}
diff --git a/board/TencentOS_Tiny_CH32V307_EVB/examples/qcloud_csdk_iot_explorer/data_template_config.h b/board/TencentOS_Tiny_CH32V307_EVB/examples/qcloud_csdk_iot_explorer/data_template_config.h
new file mode 100644
index 00000000..acf79463
--- /dev/null
+++ b/board/TencentOS_Tiny_CH32V307_EVB/examples/qcloud_csdk_iot_explorer/data_template_config.h
@@ -0,0 +1,264 @@
+/**
+ * @copyright
+ *
+ * Tencent is pleased to support the open source community by making IoT Hub available.
+ * Copyright(C) 2018 - 2021 THL A29 Limited, a Tencent company.All rights reserved.
+ *
+ * Licensed under the MIT License(the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://opensource.org/licenses/MIT
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is
+ * distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * @file data_template_config.h
+ * @brief
+ * @author fancyxu (fancyxu@tencent.com)
+ * @version 1.0
+ * @date 2021-10-09
+ *
+ * @par Change Log:
+ * <table>
+ * <tr><th>Date       <th>Version <th>Author    <th>Description
+ * <tr><td>2021-10-09 <td>1.0     <td>fancyxu   <td>first commit
+ * </table>
+ */
+
+#ifndef IOT_HUB_DEVICE_C_SDK_APP_DATA_TEMPLATE_DATA_TEMPLATE_CONFIG_H_
+#define IOT_HUB_DEVICE_C_SDK_APP_DATA_TEMPLATE_DATA_TEMPLATE_CONFIG_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "qcloud_iot_common.h"
+#include "qcloud_iot_data_template.h"
+
+/**
+ * @brief Type of property.
+ *
+ */
+typedef enum {
+    // basic type
+    DATA_TEMPLATE_TYPE_INT,
+    DATA_TEMPLATE_TYPE_ENUM,
+    DATA_TEMPLATE_TYPE_STRING_ENUM,
+    DATA_TEMPLATE_TYPE_FLOAT,
+    DATA_TEMPLATE_TYPE_BOOL,
+    DATA_TEMPLATE_TYPE_STRING,
+    DATA_TEMPLATE_TYPE_TIME,
+    // construct by basic type
+    DATA_TEMPLATE_TYPE_STRUCT,
+    DATA_TEMPLATE_TYPE_ARRAY,
+} DataTemplatePropertyType;
+
+/**
+ * @brief Declaration.
+ *
+ */
+typedef struct DataTemplateProperty     DataTemplateProperty;
+typedef union DataTemplatePropertyValue DataTemplatePropertyValue;
+
+/**
+ * @brief Property value definition.
+ *
+ */
+union DataTemplatePropertyValue {
+    int32_t  value_int;
+    int32_t  value_enum;
+    char*    value_string_enum;
+    float    value_float;
+    int32_t  value_bool;
+    char*    value_string;
+    uint32_t value_time;
+    struct {
+        DataTemplateProperty* property;
+        int                   count;
+    } value_struct;
+    DataTemplatePropertyValue* value_arrary; /**< not supportted yet */
+};
+
+/**
+ * @brief Property definition.
+ *
+ */
+struct DataTemplateProperty {
+    DataTemplatePropertyType  type;
+    const char*               key;
+    DataTemplatePropertyValue value;
+    int                       need_report;
+};
+
+/**
+ * @brief Event definition.
+ *
+ */
+#define DataTemplateEvent IotDataTemplateEventData
+
+/**
+ * @brief Action definition.
+ *
+ */
+typedef struct {
+    const char*                action_id;
+    DataTemplatePropertyValue  input_struct;
+    IotDataTemplateActionReply reply;
+} DataTemplateAction;
+
+/**************************************************************************************
+ * usr data template definition
+ **************************************************************************************/
+
+typedef enum {
+    USR_PROPERTY_INDEX_POWER_SWITCH = 0,
+    USR_PROPERTY_INDEX_COLOR,
+    USR_PROPERTY_INDEX_BRIGHTNESS,
+    USR_PROPERTY_INDEX_NAME,
+    USR_PROPERTY_INDEX_POSITION,
+    USR_PROPERTY_INDEX_POWER,
+} UsrPropertyIndex;
+
+typedef enum {
+    USR_PROPERTY_POSITION_INDEX_LONGITUDE = 0,
+    USR_PROPERTY_POSITION_INDEX_LATITUDE,
+} UsrPropertyPositionIndex;
+
+typedef enum {
+    USR_EVENT_INDEX_STATUS_REPORT = 0,
+    USR_EVENT_INDEX_LOW_VOLTAGE,
+    USR_EVENT_INDEX_HARDWARE_FAULT,
+} UsrEventIndex;
+
+typedef enum {
+    USR_ACTION_INDEX_LIGHT_BLINK = 0,
+} UsrActionIndex;
+
+typedef enum {
+    USR_ACTION_LIGHT_BLINK_INPUT_INDEX_TIME = 0,
+    USR_ACTION_LIGHT_BLINK_INPUT_INDEX_COLOR,
+    USR_ACTION_LIGHT_BLINK_INPUT_INDEX_TOTAL_TIME,
+} UsrActionLightBlinkInputIndex;
+
+/**************************************************************************************
+ * api for user data template
+ **************************************************************************************/
+
+/**
+ * @brief Init user data template(property/event/action).
+ *
+ */
+void usr_data_template_init(void);
+
+/**
+ * @brief Get property value.
+ *
+ * @param[in] index @see UsrPropertyIndex
+ * @return @see DataTemplatePropertyValue
+ */
+DataTemplatePropertyValue usr_data_template_property_value_get(UsrPropertyIndex index);
+
+/**
+ * @brief Set property value.
+ *
+ * @param[in] index @see UsrPropertyIndex
+ * @param[in] value @see DataTemplatePropertyValue, @note value should match property type.
+ */
+void usr_data_template_property_value_set(UsrPropertyIndex index, DataTemplatePropertyValue value);
+
+/**
+ * @brief Get property(struct) value.
+ *
+ * @param[in] struct_index @see UsrPropertyIndex, @note DATA_TEMPLATE_TYPE_STRUCT is required here.
+ * @param[in] property_index depends on which struct
+ * @return @see DataTemplatePropertyValue
+ */
+DataTemplatePropertyValue usr_data_template_property_struct_value_get(UsrPropertyIndex struct_index,
+                                                                      int              property_index);
+
+/**
+ * @brief Set property(struct) value.
+ *
+ * @param[in] struct_index @see UsrPropertyIndex, @note DATA_TEMPLATE_TYPE_STRUCT is required here.
+ * @param[in] property_index depends on which struct
+ * @param[in] value  @see DataTemplatePropertyValue, @note value should match property type.
+ */
+void usr_data_template_property_struct_value_set(UsrPropertyIndex struct_index, int property_index,
+                                                 DataTemplatePropertyValue value);
+
+/**
+ * @brief Parse control message and set property value.
+ *
+ * @param[in] params params filed of control message
+ */
+void usr_data_template_property_parse(UtilsJsonValue params);
+
+/**
+ * @brief Get property status.
+ *
+ * @param[in] index @see UsrPropertyIndex
+ * @return need_report
+ */
+int usr_data_template_property_status_get(UsrPropertyIndex index);
+
+/**
+ * @brief Report all the properties needed report.
+ *
+ * @param[in,out] client pointer to mqtt client
+ * @param[in] buf buffer to report
+ * @param[in] buf_len buffer length
+ * @return packet id (>=0) when success, or err code (<0) @see IotReturnCode
+ */
+int usr_data_template_property_report(void* client, char* buf, int buf_len);
+
+/**
+ * @brief Post event.
+ *
+ * @param[in,out] client pointer to mqtt client
+ * @param[in] buf buffer to report
+ * @param[in] buf_len buffer length
+ * @param[in] id @see UsrEventIndex
+ * @param[in] params user should construct params according to event.
+ */
+void usr_data_template_event_post(void* client, char* buf, int buf_len, UsrEventIndex id, const char* params);
+
+/**
+ * @brief Parse action message and set action input params.
+ *
+ * @param[in] action_id action id
+ * @param[in] params params of action
+ * @param[out] index @see UsrActionIndex
+ * @return 0 for success, QCLOUD_ERR_JSON_PARSE for invalid json.
+ */
+int usr_data_template_action_parse(UtilsJsonValue action_id, UtilsJsonValue params, UsrActionIndex* index);
+
+/**
+ * @brief Get input value, should call after usr_data_template_action_parse
+ *
+ * @param[in] index index get from usr_data_template_action_parse
+ * @param[in] property_index property index of action input params
+ * @return @see DataTemplatePropertyValue
+ */
+DataTemplatePropertyValue usr_data_template_action_input_value_get(UsrActionIndex index, int property_index);
+
+/**
+ * @brief Reply action, should call after parse action message.
+ *
+ * @param[in,out] client pointer to mqtt client
+ * @param[in] buf buffer to report
+ * @param[in] buf_len buffer length
+ * @param[in] index @see UsrActionIndex
+ * @param[in] client_token client token of action message
+ * @param[in] code result code for action, 0 for success
+ * @param[in] response action output params, user should construct params according to action
+ * @return packet id (>=0) when success, or err code (<0) @see IotReturnCode
+ */
+int usr_data_template_action_reply(void* client, char* buf, int buf_len, UsrActionIndex index,
+                                   UtilsJsonValue client_token, int code, const char* response);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // IOT_HUB_DEVICE_C_SDK_APP_DATA_TEMPLATE_DATA_TEMPLATE_CONFIG_H_
diff --git a/components/connectivity/iot-hub-device-c-sdk/platform/os/TencentOS-Tiny/HAL_Timer_tos.c b/components/connectivity/iot-hub-device-c-sdk/platform/os/TencentOS-Tiny/HAL_Timer_tos.c
index 80ee5441..6471ac41 100644
--- a/components/connectivity/iot-hub-device-c-sdk/platform/os/TencentOS-Tiny/HAL_Timer_tos.c
+++ b/components/connectivity/iot-hub-device-c-sdk/platform/os/TencentOS-Tiny/HAL_Timer_tos.c
@@ -62,7 +62,7 @@ bool HAL_Timer_Expired(Timer *timer)
  * @param[in,out] timer @see Timer
  * @param[in] timeout_ms ms to count down
  */
-void HAL_Timer_CountdownMs(Timer *timer, unsigned int timeout_ms)
+void HAL_Timer_CountdownMs(Timer *timer, uint32_t timeout_ms)
 {
     k_tick_t tick;
     k_tick_t now;
@@ -81,7 +81,7 @@ void HAL_Timer_CountdownMs(Timer *timer, unsigned int timeout_ms)
  * @param[in,out] timer @see Timer
  * @param[in] timeout second to count down
  */
-void HAL_Timer_Countdown(Timer *timer, unsigned int timeout)
+void HAL_Timer_Countdown(Timer *timer, uint32_t timeout)
 {
     k_tick_t now;
     k_tick_t tick;