diff --git a/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ota/Readme.md b/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ota/Readme.md
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+# 编译
+路径 Ubiquitous/XiZi_IIoT 下，执行 make BOARD=ch32v208rbt6 menuconfig，打开config 选项：
+
+     .config - XiZi_IIoT Project Configuration
+     > Tool feature > OTA function > Enable support OTA function > Compile bootloader bin or application bin.
+
+![alt text](img/boot_or_app.png)
+
+
+
+     .config - XiZi_IIoT Project Configuration
+     > APP_Framework > app lib > lib using MQTT > Enable support MQTT function > xiuos platform mqtt connection parameter configuration.
+
+![alt text](img/mqtt_config.png)
+
+执行 make BOARD=ch32v208rbt6，进行编译。
+
+编译后，分别生成 XiZi-ch32v208rbt6-boot.bin 和 XiZi-ch32v208rbt6-app.bin，以及 XiZi-ch32v208rbt6-boot.hex 和 XiZi-ch32v208rbt6-app.hex。
+
+从沁恒官网（[产品手册 - 南京沁恒微电子股份有限公司](https://www.wch.cn/downloads/category/27.html)）下载工具软件 WCH_AssemblingFileTool.exe，将 XiZi-ch32v208rbt6-boot.hex 和 XiZi-ch32v208rbt6-app.hex 合并成 XiZi-ch32v208rbt6.bin。
+
+![alt text](img/AssemblingFileTool.png)
+
+
+
+# 烧录
+从沁恒官网下载工具软件 WchIspStudio.exe，选择芯片和串口，选择固件。
+
+设备端，按boot和reset按键，让设备进入烧录模式。点击“解除代码保护”和“下载”，进行烧录。
+
+![alt text](img/WchIspStudio.png)
+
+
+
+# OTA升级
+
+烧录成功后，先启动 boot 程序，然后跳转到 app 程序 。
+
+![alt text](img/boot_start.png)
+
+![alt text](img/jump_to_app.png)
+
+进入系统后初始化4G模块并开启线程进行mqtt通信，可以看到此时的版本是 001.000.000。
+
+![alt text](img/current_version.png)
+
+然后，需要进入publisher，将要更新的app程序XiZi-ch32v208rbt6-app.bin放到publisher下，修改main.py中的version和文件名。
+
+然后，电脑上运行 python3 main_early.py (需pip install paho-mqtt安装依赖库)。
+
+![alt text](img/python_early.png)
+
+设备检测到版本信息后，写入OTA状态，然后重启，重启后boot进入下载状态。
+
+![alt text](img/ota_flag.png)
+
+然后，电脑上运行 python3 main.py。
+
+![alt text](img/python_main.png)
+
+设备检测到版本信息后，开始传输文件。
+
+![alt text](img/download_start.png)
+
+当传输进度为100%后，更新app的bin将烧录至APP区，之后板子会自动重启。
+
+![alt text](img/download_ok.png)
+
+重启后依然先进入boot，然后启动app。查看APP日志，以及version打印信息确认升级成功。
+
+
+
+# 注意事项
+
+CH32V208的FLASH大小是480KB，其中零等待运行区域大小是128KB。FLASH快速写函数以及系统中断等关键函数需要运行在零等待运行区域。
+
+程序分布如下：
+
+|address|Area|Size|
+|-|-|-|
+|0x08000000 ~ 0x08008000 | Boot_FAST | 32KB |
+|0x08008000 ~ 0x08050000 | Application | 288KB |
+|0x08050000 ~ 0x08077000 | Boot_SLOW | 156KB |
+|0x08077000 ~ 0x08078000 | OTA_FLAG | 4KB |
+
+
diff --git a/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ota/img/AssemblingFileTool.png b/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ota/img/AssemblingFileTool.png
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diff --git a/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ota/publisher/main.py b/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ota/publisher/main.py
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+++ b/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ota/publisher/main.py
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+import paho.mqtt.client as mqtt
+import json
+import os
+import hashlib
+
+# 配置参数（根据实际情况修改）
+MQTT_BROKER = "47.115.50.232"  # MQTT代理地址
+MQTT_PORT = 1883                   # 端口
+FILE_PATH = "XiZi-ch32v208rbt6-app.bin"         # 要发送的固件文件路径
+CLIENT_ID = "D001"                 # 设备客户端ID
+VERSION = "001.000.002"            # 新固件版本号
+FILE_ID = 1                        # 文件标识符
+
+def calculate_md5(file_path):
+    """ 计算文件的MD5哈希值 """
+    hash_md5 = hashlib.md5()
+    with open(file_path, "rb") as f:
+        for chunk in iter(lambda: f.read(4096), b""):
+            hash_md5.update(chunk)
+    return hash_md5.hexdigest()
+
+def compact_json(payload: dict) -> str:
+    """生成无空格/换行的紧凑JSON字符串"""
+    return json.dumps(payload, separators=(',', ':'))
+
+def on_connect(client, userdata, flags, rc):
+    """ 连接回调函数 """
+    if rc == 0:
+        print("连接成功!")
+        # 订阅文件请求主题
+        client.subscribe("xiuosiot/ota/files")
+        
+        # 发送初始更新信息
+        init_payload = {
+            "fileSize": userdata["file_size"],
+            "version": userdata["fw_version"],
+            "fileId": userdata["file_id"],
+            "md5": userdata["file_md5"]
+        }
+        client.publish(
+            topic=f"ota/{CLIENT_ID}/update",
+            payload=compact_json(init_payload),
+            qos=1
+        )
+        print(f"已发送初始化消息到 ota/{CLIENT_ID}/update")
+        
+    else:
+        print(f"连接失败，错误码：{rc}")
+
+def on_message(client, userdata, msg):
+    """ 消息到达回调函数 """
+    try:
+        payload = json.loads(msg.payload.decode())
+        print("收到文件请求:", payload)
+
+        # 验证必要字段
+        required_fields = ["clientId", "fileId", "fileOffset", "size"]
+        if not all(field in payload for field in required_fields):
+            print("错误：缺少必要字段")
+            return
+
+        # 验证客户端ID
+        if payload["clientId"] != CLIENT_ID:
+            print(f"忽略非目标客户端请求：{payload['clientId']}")
+            return
+
+        # 提取请求参数
+        offset = payload["fileOffset"]
+        request_size = payload["size"]
+        reply_topic = f"ota/{CLIENT_ID}/files"
+
+        # 读取文件内容
+        try:
+            with open(FILE_PATH, "rb") as f:
+                f.seek(offset)
+                file_data = f.read(request_size)
+                
+                if len(file_data) == 0:
+                    print("错误：读取到空数据或超出文件范围")
+                    return
+        except Exception as e:
+            print(f"文件读取失败：{str(e)}")
+            return
+
+        # 发送文件片段
+        client.publish(reply_topic, file_data, qos=1)
+        print(f"已发送 {len(file_data)} 字节到 {reply_topic}")
+
+    except json.JSONDecodeError:
+        print("错误：无效的JSON格式")
+    except Exception as e:
+        print(f"处理消息时出错：{str(e)}")
+
+def main():
+    # 验证文件存在性
+    if not os.path.exists(FILE_PATH):
+        print(f"错误：文件 {FILE_PATH} 不存在")
+        exit(1)
+
+    # 计算文件参数
+    file_size = os.path.getsize(FILE_PATH)
+    file_md5 = calculate_md5(FILE_PATH)
+
+    # 创建MQTT客户端
+    client = mqtt.Client(userdata={
+        "file_size": file_size,
+        "fw_version": VERSION,
+        "file_id": FILE_ID,
+        "file_md5": file_md5
+    })
+
+    # 设置回调函数
+    client.on_connect = on_connect
+    client.on_message = on_message
+
+    try:
+        client.username_pw_set("ch32v208", "xiuosiot")  # 取消注释并填写凭证
+        client.connect(MQTT_BROKER, MQTT_PORT, 60)
+        client.loop_forever()
+    except KeyboardInterrupt:
+        print("\n程序已终止")
+    except Exception as e:
+        print(f"连接错误：{str(e)}")
+        exit(1)
+
+if __name__ == "__main__":
+    main()
diff --git a/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ota/publisher/main_early.py b/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ota/publisher/main_early.py
new file mode 100644
index 000000000..301ccc51e
--- /dev/null
+++ b/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ota/publisher/main_early.py
@@ -0,0 +1,127 @@
+import paho.mqtt.client as mqtt
+import json
+import os
+import hashlib
+
+# 配置参数（根据实际情况修改）
+MQTT_BROKER = "47.115.50.232"  # MQTT代理地址
+MQTT_PORT = 1883                   # 端口
+FILE_PATH = "XiZi-ch32v208rbt6-app.bin"         # 要发送的固件文件路径
+CLIENT_ID = "D001"                 # 设备客户端ID
+VERSION = "001.000.002"            # 新固件版本号
+FILE_ID = 1                        # 文件标识符
+
+def calculate_md5(file_path):
+    """ 计算文件的MD5哈希值 """
+    hash_md5 = hashlib.md5()
+    with open(file_path, "rb") as f:
+        for chunk in iter(lambda: f.read(4096), b""):
+            hash_md5.update(chunk)
+    return hash_md5.hexdigest()
+
+def compact_json(payload: dict) -> str:
+    """生成无空格/换行的紧凑JSON字符串"""
+    return json.dumps(payload, separators=(',', ':'))
+
+def on_connect(client, userdata, flags, rc):
+    """ 连接回调函数 """
+    if rc == 0:
+        print("连接成功!")
+        # 订阅文件请求主题
+        client.subscribe("xiuosiot/ota/files")
+        
+        # 发送初始更新信息
+        init_payload = {
+            "fileSize": userdata["file_size"],
+            "version": userdata["fw_version"],
+            "fileId": userdata["file_id"],
+            "md5": userdata["file_md5"]
+        }
+        client.publish(
+            topic=f"ota/{CLIENT_ID}/update",
+            payload=compact_json(init_payload),
+            qos=1
+        )
+        print(f"已发送初始化消息到 ota/{CLIENT_ID}/update")
+        
+    else:
+        print(f"连接失败，错误码：{rc}")
+
+def on_message(client, userdata, msg):
+    """ 消息到达回调函数 """
+    try:
+        payload = json.loads(msg.payload.decode())
+        print("收到文件请求:", payload)
+
+        # 验证必要字段
+        required_fields = ["clientId", "fileId", "fileOffset", "size"]
+        if not all(field in payload for field in required_fields):
+            print("错误：缺少必要字段")
+            return
+
+        # 验证客户端ID
+        if payload["clientId"] != CLIENT_ID:
+            print(f"忽略非目标客户端请求：{payload['clientId']}")
+            return
+
+        # 提取请求参数
+        offset = payload["fileOffset"]
+        request_size = payload["size"]
+        reply_topic = f"ota/{CLIENT_ID}/files"
+
+        # 读取文件内容
+        try:
+            with open(FILE_PATH, "rb") as f:
+                f.seek(offset)
+                file_data = f.read(request_size)
+                
+                if len(file_data) == 0:
+                    print("错误：读取到空数据或超出文件范围")
+                    return
+        except Exception as e:
+            print(f"文件读取失败：{str(e)}")
+            return
+
+        # 发送文件片段
+        #client.publish(reply_topic, file_data, qos=1)
+        #print(f"已发送 {len(file_data)} 字节到 {reply_topic}")
+
+    except json.JSONDecodeError:
+        print("错误：无效的JSON格式")
+    except Exception as e:
+        print(f"处理消息时出错：{str(e)}")
+
+def main():
+    # 验证文件存在性
+    if not os.path.exists(FILE_PATH):
+        print(f"错误：文件 {FILE_PATH} 不存在")
+        exit(1)
+
+    # 计算文件参数
+    file_size = os.path.getsize(FILE_PATH)
+    file_md5 = calculate_md5(FILE_PATH)
+
+    # 创建MQTT客户端
+    client = mqtt.Client(userdata={
+        "file_size": file_size,
+        "fw_version": VERSION,
+        "file_id": FILE_ID,
+        "file_md5": file_md5
+    })
+
+    # 设置回调函数
+    client.on_connect = on_connect
+    client.on_message = on_message
+
+    try:
+        client.username_pw_set("ch32v208", "xiuosiot")  # 取消注释并填写凭证
+        client.connect(MQTT_BROKER, MQTT_PORT, 60)
+        client.loop_forever()
+    except KeyboardInterrupt:
+        print("\n程序已终止")
+    except Exception as e:
+        print(f"连接错误：{str(e)}")
+        exit(1)
+
+if __name__ == "__main__":
+    main()