diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/01.\346\225\231\345\255\246PPT\357\274\210PDF\347\211\210\357\274\211/\343\200\220\345\234\250\347\272\277\343\200\221\351\270\277\350\222\231\345\205\245\351\227\250\347\263\273\345\210\227\342\200\224\342\200\224Hi3861\345\274\200\345\217\221\346\235\277\345\237\272\347\241\200\350\257\276\347\250\213\342\200\224\342\200\224\347\254\2541\350\256\262\357\274\232Hi3861\345\274\200\345\217\221\347\216\257\345\242\203\346\220\255\345\273\272.pdf" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/01.\346\225\231\345\255\246PPT\357\274\210PDF\347\211\210\357\274\211/\343\200\220\345\234\250\347\272\277\343\200\221\351\270\277\350\222\231\345\205\245\351\227\250\347\263\273\345\210\227\342\200\224\342\200\224Hi3861\345\274\200\345\217\221\346\235\277\345\237\272\347\241\200\350\257\276\347\250\213\342\200\224\342\200\224\347\254\2541\350\256\262\357\274\232Hi3861\345\274\200\345\217\221\347\216\257\345\242\203\346\220\255\345\273\272.pdf"
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diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/01.\346\225\231\345\255\246PPT\357\274\210PDF\347\211\210\357\274\211/\343\200\220\345\234\250\347\272\277\343\200\221\351\270\277\350\222\231\345\205\245\351\227\250\347\263\273\345\210\227\342\200\224\342\200\224Hi3861\345\274\200\345\217\221\346\235\277\345\237\272\347\241\200\350\257\276\347\250\213\342\200\224\342\200\224\347\254\2542\350\256\262\357\274\232Hi3861\344\270\212\350\277\220\350\241\214\347\254\254\344\270\200\344\270\252Hello.pdf" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/01.\346\225\231\345\255\246PPT\357\274\210PDF\347\211\210\357\274\211/\343\200\220\345\234\250\347\272\277\343\200\221\351\270\277\350\222\231\345\205\245\351\227\250\347\263\273\345\210\227\342\200\224\342\200\224Hi3861\345\274\200\345\217\221\346\235\277\345\237\272\347\241\200\350\257\276\347\250\213\342\200\224\342\200\224\347\254\2542\350\256\262\357\274\232Hi3861\344\270\212\350\277\220\350\241\214\347\254\254\344\270\200\344\270\252Hello.pdf"
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diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/01.\346\225\231\345\255\246PPT\357\274\210PDF\347\211\210\357\274\211/\343\200\220\345\234\250\347\272\277\343\200\221\351\270\277\350\222\231\345\205\245\351\227\250\347\263\273\345\210\227\342\200\224\342\200\224Hi3861\345\274\200\345\217\221\346\235\277\345\237\272\347\241\200\350\257\276\347\250\213\342\200\224\342\200\224\347\254\2543\350\256\262\357\274\232Hi3861\345\244\226\350\256\276\342\200\224\342\200\224\346\231\272\350\203\275\347\272\242\347\273\277\347\201\257\346\235\277\345\274\200\345\217\221.pdf" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/01.\346\225\231\345\255\246PPT\357\274\210PDF\347\211\210\357\274\211/\343\200\220\345\234\250\347\272\277\343\200\221\351\270\277\350\222\231\345\205\245\351\227\250\347\263\273\345\210\227\342\200\224\342\200\224Hi3861\345\274\200\345\217\221\346\235\277\345\237\272\347\241\200\350\257\276\347\250\213\342\200\224\342\200\224\347\254\2543\350\256\262\357\274\232Hi3861\345\244\226\350\256\276\342\200\224\342\200\224\346\231\272\350\203\275\347\272\242\347\273\277\347\201\257\346\235\277\345\274\200\345\217\221.pdf"
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diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/01.\346\225\231\345\255\246PPT\357\274\210PDF\347\211\210\357\274\211/\343\200\220\345\234\250\347\272\277\343\200\221\351\270\277\350\222\231\345\205\245\351\227\250\347\263\273\345\210\227\342\200\224\342\200\224Hi3861\345\274\200\345\217\221\346\235\277\345\237\272\347\241\200\350\257\276\347\250\213\342\200\224\342\200\224\347\254\2544\350\256\262\357\274\232Hi3861\345\244\226\350\256\276\342\200\224\342\200\224\347\216\257\345\242\203\347\233\221\346\265\213\346\235\277\345\274\200\345\217\221.pdf" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/01.\346\225\231\345\255\246PPT\357\274\210PDF\347\211\210\357\274\211/\343\200\220\345\234\250\347\272\277\343\200\221\351\270\277\350\222\231\345\205\245\351\227\250\347\263\273\345\210\227\342\200\224\342\200\224Hi3861\345\274\200\345\217\221\346\235\277\345\237\272\347\241\200\350\257\276\347\250\213\342\200\224\342\200\224\347\254\2544\350\256\262\357\274\232Hi3861\345\244\226\350\256\276\342\200\224\342\200\224\347\216\257\345\242\203\347\233\221\346\265\213\346\235\277\345\274\200\345\217\221.pdf"
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diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/01.\346\225\231\345\255\246PPT\357\274\210PDF\347\211\210\357\274\211/\343\200\220\345\234\250\347\272\277\343\200\221\351\270\277\350\222\231\345\205\245\351\227\250\347\263\273\345\210\227\342\200\224\342\200\224Hi3861\345\274\200\345\217\221\346\235\277\345\237\272\347\241\200\350\257\276\347\250\213\342\200\224\342\200\224\347\254\2545\350\256\262\357\274\232Hi3861\344\270\212\344\272\244\344\272\222\345\221\275\344\273\244AT\345\210\206\346\236\220\345\217\212\345\256\236\347\216\260.pdf" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/01.\346\225\231\345\255\246PPT\357\274\210PDF\347\211\210\357\274\211/\343\200\220\345\234\250\347\272\277\343\200\221\351\270\277\350\222\231\345\205\245\351\227\250\347\263\273\345\210\227\342\200\224\342\200\224Hi3861\345\274\200\345\217\221\346\235\277\345\237\272\347\241\200\350\257\276\347\250\213\342\200\224\342\200\224\347\254\2545\350\256\262\357\274\232Hi3861\344\270\212\344\272\244\344\272\222\345\221\275\344\273\244AT\345\210\206\346\236\220\345\217\212\345\256\236\347\216\260.pdf"
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diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/01.\346\225\231\345\255\246PPT\357\274\210PDF\347\211\210\357\274\211/\343\200\220\345\234\250\347\272\277\343\200\221\351\270\277\350\222\231\345\205\245\351\227\250\347\263\273\345\210\227\342\200\224\342\200\224Hi3861\345\274\200\345\217\221\346\235\277\345\237\272\347\241\200\350\257\276\347\250\213\342\200\224\342\200\224\347\254\2546\350\256\262\357\274\232Hi3861\344\270\212WiFi\345\274\200\345\217\221.pdf" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/01.\346\225\231\345\255\246PPT\357\274\210PDF\347\211\210\357\274\211/\343\200\220\345\234\250\347\272\277\343\200\221\351\270\277\350\222\231\345\205\245\351\227\250\347\263\273\345\210\227\342\200\224\342\200\224Hi3861\345\274\200\345\217\221\346\235\277\345\237\272\347\241\200\350\257\276\347\250\213\342\200\224\342\200\224\347\254\2546\350\256\262\357\274\232Hi3861\344\270\212WiFi\345\274\200\345\217\221.pdf"
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diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/01.\346\225\231\345\255\246PPT\357\274\210PDF\347\211\210\357\274\211/\343\200\220\345\234\250\347\272\277\343\200\221\351\270\277\350\222\231\345\205\245\351\227\250\347\263\273\345\210\227\342\200\224\342\200\224Hi3861\345\274\200\345\217\221\346\235\277\345\237\272\347\241\200\350\257\276\347\250\213\342\200\224\342\200\224\347\254\2547\350\256\262\357\274\232Hi3861\344\270\212\347\275\221\347\273\234\347\274\226\347\250\213\345\274\200\345\217\221.pdf" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/01.\346\225\231\345\255\246PPT\357\274\210PDF\347\211\210\357\274\211/\343\200\220\345\234\250\347\272\277\343\200\221\351\270\277\350\222\231\345\205\245\351\227\250\347\263\273\345\210\227\342\200\224\342\200\224Hi3861\345\274\200\345\217\221\346\235\277\345\237\272\347\241\200\350\257\276\347\250\213\342\200\224\342\200\224\347\254\2547\350\256\262\357\274\232Hi3861\344\270\212\347\275\221\347\273\234\347\274\226\347\250\213\345\274\200\345\217\221.pdf"
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diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/01.\346\225\231\345\255\246PPT\357\274\210PDF\347\211\210\357\274\211/\343\200\220\345\234\250\347\272\277\343\200\221\351\270\277\350\222\231\345\205\245\351\227\250\347\263\273\345\210\227\342\200\224\342\200\224Hi3861\345\274\200\345\217\221\346\235\277\345\237\272\347\241\200\350\257\276\347\250\213\342\200\224\342\200\224\347\254\2548\350\256\262\357\274\232Hi3861\344\270\212\347\211\251\350\201\224\347\275\221\345\272\224\347\224\250\345\274\200\345\217\221.pdf" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/01.\346\225\231\345\255\246PPT\357\274\210PDF\347\211\210\357\274\211/\343\200\220\345\234\250\347\272\277\343\200\221\351\270\277\350\222\231\345\205\245\351\227\250\347\263\273\345\210\227\342\200\224\342\200\224Hi3861\345\274\200\345\217\221\346\235\277\345\237\272\347\241\200\350\257\276\347\250\213\342\200\224\342\200\224\347\254\2548\350\256\262\357\274\232Hi3861\344\270\212\347\211\251\350\201\224\347\275\221\345\272\224\347\224\250\345\274\200\345\217\221.pdf"
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index 0000000000000000000000000000000000000000..f0493c3802c218b9761cb0a3ace749bd15392fb2
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diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_02/BUILD.gn" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_02/BUILD.gn"
new file mode 100644
index 0000000000000000000000000000000000000000..55ac750e1368d8fe740fcad719496e1e9778e669
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_02/BUILD.gn"
@@ -0,0 +1,10 @@
+
+static_library("myapp2") {
+    sources = [
+        "hello_world.c"
+    ]
+
+    include_dirs = [
+        "//utils/native/lite/include"
+    ]
+}
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_02/hello_world.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_02/hello_world.c"
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index 0000000000000000000000000000000000000000..238628517dd525f0505994cfb5c0c369e7d2103f
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_02/hello_world.c"
@@ -0,0 +1,10 @@
+#include <stdio.h>
+#include "ohos_init.h"
+
+ void hello_world(void){
+
+     printf("chinasoft  ----->hello world!");
+
+ }
+
+ SYS_RUN(hello_world);//启动恢复模块接口
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/BUILD.gn" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/BUILD.gn"
new file mode 100644
index 0000000000000000000000000000000000000000..1f3dbbc9f271b1d73ee9371faed33d111c55491e
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/BUILD.gn"
@@ -0,0 +1,15 @@
+static_library("chapter_03_demo") {
+    sources = [
+        # "led_demo.c",
+        # "traffic_light_demo.c",
+        #   "beeper_demo.c",
+       "beeper_music_demo.c",
+    ]
+
+    include_dirs = [
+        "//utils/native/lite/include",
+        "//kernel/liteos_m/components/cmsis/2.0",
+        "//base/iot_hardware/interfaces/kits/wifiiot_lite",
+    ]
+}
+
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/README.md" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/README.md"
new file mode 100644
index 0000000000000000000000000000000000000000..98510981ac55bf4a311130fb864292878f60eb13
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/README.md"
@@ -0,0 +1,63 @@
+# Harmony OS物联网应用开发实战 第二章
+
+**本节课程主要介绍如何在HiSpark WiFi IoT套件上使用Hamony OS进行编程，以及如何使用GPIO输入输出功能。**
+
+
+
+## 相关知识点
+
+* 官方第一个应用程序示例演示
+  * 熟悉使用DevEco Device Tool插件进行程序烧录
+  * 熟悉串口调试工具sscom的使用
+* 官方文档中控制核心板上LED的演示
+	* 源码路径：`applications/sample/wifi-iot/app/iothardware/led_example.c`
+	* Harmony OS IoT内核（liteos-m）接口——[CMSIS-RTOS API v2](https://arm-software.github.io/CMSIS_5/RTOS2/html/rtos_api2.html)
+	  * 线程创建`osThreadNew`
+	* 鸿蒙系统启动注册接口——`ohos_init.h`
+	  * `APP_FEATURE_INIT`注册自启动函数
+	* 使用GPIO接口输出高低电平，实现控制LED灯亮灭
+	  * 设置管脚功能`IoSetFunc`
+	  * 设置GPIO引脚方向`GpioSetDir`
+	* 使用GPIO接口注册中断处理函数，实现USER按键响应（输入）
+	  * 设置内部上拉下拉状态`IoSetPull`（没有外部上拉电阻时需要设置上拉，才能保证能够检测到下降沿）
+	  * 注册中断处理函数`GpioRegisterIsrFunc`，具体参数使用参考头文件说明
+	* 具体使用参考`wifiiot_gpio.h`和`wifiiot_gpio_ex.h`文件里的注释
+* HiSpark Wi-Fi IoT 开发套件 交通灯板 控制
+	* 使用PWM接口输出PWM方波，实现蜂鸣器控制
+	* 使用GPIO接口的部分和上一个示例类似
+	* 具体使用参考`wifiiot_pwm.h`文件里的注释
+
+
+
+## 核心板和交通灯板上外设与主控芯片（Hi3861）引脚的对应关系
+
+* 核心板
+  * GPIO_9 连接LED灯，输出低电平点亮LED灯
+  * GPIO_5 连接按键，按键中断控制LED灯状态反转
+* 交通灯板
+  * GPIO_8 连接蜂鸣器，输出PWM波控制蜂鸣器发出声音
+  * GPIO_9 连接按键，按键中断切换亮的LED灯，同时切换蜂鸣器响或者不响
+  * GPIO_10 连接红色LED，输出高电平点亮红色LED灯
+  * GPIO_11 连接绿色LED，输出高电平点亮绿色LED灯
+  * GPIO_12 连接黄色LED，输出高电平点亮黄色LED灯
+
+
+
+## 如何编译
+
+1. 将此目录下的 `traffic_light_demo.c` 和 `BUILD.gn` 复制到openharmony源码的`applications\sample\wifi-iot\app\iothardware`目录下，
+2. 修改openharmony源码的`applications\sample\wifi-iot\app\BUILD.gn`文件，将其中的 `features` 改为：
+```python
+    features = [
+        "iothardware:traffic_light_demo",
+    ]
+```
+3. 在openharmony源码顶层目录执行：`python build.py wifiiot`
+
+### 报错解决
+
+1. 编译过程中报错：undefined reference to `hi_pwm_init` 等几个 `hi_pwm_`开头的函数，
+	* **原因：** 因为默认情况下，hi3861_sdk中，PWM的CONFIG选项没有打开
+	* **解决：** 修改`vendor\hisi\hi3861\hi3861\build\config\usr_config.mk`文件中的`CONFIG_PWM_SUPPORT`行：
+	  * `# CONFIG_PWM_SUPPORT is not set`修改为`CONFIG_PWM_SUPPORT=y`
+
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/beeper_demo.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/beeper_demo.c"
new file mode 100644
index 0000000000000000000000000000000000000000..01c4340d88a4324a4b43c74cde16364ae9c5608d
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/beeper_demo.c"
@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <unistd.h>
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include "wifiiot_gpio.h"
+#include "wifiiot_gpio_ex.h"
+#include "wifiiot_pwm.h"
+#include "hi_pwm.h"
+
+void init(void)
+{
+    GpioInit();
+
+    // 蜂鸣器引脚 设置为 PWM功能
+    IoSetFunc(WIFI_IOT_IO_NAME_GPIO_9, WIFI_IOT_IO_FUNC_GPIO_9_PWM0_OUT);
+    PwmInit(WIFI_IOT_PWM_PORT_PWM0);
+}
+
+void BeeperDemo(void)
+{
+    init();
+    while (1)
+    {
+
+        uint16_t freqDivisor = 34052;
+        //                                  占空比，        频率
+        PwmStart(WIFI_IOT_PWM_PORT_PWM0, freqDivisor / 2, freqDivisor);
+        usleep(2000000);
+        PwmStop(WIFI_IOT_PWM_PORT_PWM0);
+        usleep(1000000);
+    }
+}
+
+SYS_RUN(BeeperDemo);
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/beeper_music_demo.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/beeper_music_demo.c"
new file mode 100644
index 0000000000000000000000000000000000000000..7493c8bf2e7e5b8624714b1263805184021a8a9e
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/beeper_music_demo.c"
@@ -0,0 +1,84 @@
+#include <stdio.h>
+#include <unistd.h>
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include "wifiiot_gpio.h"
+#include "wifiiot_gpio_ex.h"
+#include "wifiiot_watchdog.h"
+#include "wifiiot_pwm.h"
+#include "hi_pwm.h"
+
+static const uint16_t g_tuneFreqs[] = {
+    0,     // 40M Hz 对应的分频系数：
+    38223, // 1046.5
+    34052, // 1174.7
+    30338, // 1318.5
+    28635, // 1396.9
+    25511, // 1568
+    22728, // 1760
+    20249, // 1975.5
+    51021  // 5_ 783.99 // 第一个八度的 5
+};
+
+// 曲谱音符
+static const uint8_t g_scoreNotes[] = {
+    // 《两只老虎》简谱：http://www.jianpu.cn/pu/33/33945.htm
+    1, 2, 3, 1, 1, 2, 3, 1, 3, 4, 5, 3, 4, 5,
+    5, 6, 5, 4, 3, 1, 5, 6, 5, 4, 3, 1, 1, 8, 1, 1, 8, 1, 
+};
+
+// 曲谱时值
+static const uint8_t g_scoreDurations[] = {
+    4,    4,    4, 4,  4,    4,    4, 4,  4, 4, 8,  4, 4, 8,
+    3, 1, 3, 1, 4, 4,  3, 1, 3, 1, 4, 4,  4, 4, 8,  4, 4, 8,
+};
+
+static void *BeeperMusicTask(const char *arg)
+{
+    (void)arg;
+    printf("BeeperMusicTask start!\r\n");
+    hi_pwm_set_clock(PWM_CLK_XTAL); // 设置时钟源为晶体时钟（40MHz，默认时钟源160MHz）
+    while (1)
+    {
+        for (size_t i = 0; i < sizeof(g_scoreNotes) / sizeof(g_scoreNotes[0]); i++)
+        {
+            uint32_t tune = g_scoreNotes[i]; // 音符
+            uint16_t freqDivisor = g_tuneFreqs[tune];  //获取 频率
+            uint32_t tuneInterval = g_scoreDurations[i] * (125 * 1000); // 音符时间   ，节拍，
+            printf("%d %d %d %d\r\n", tune, (40 * 1000 * 1000) / freqDivisor, freqDivisor, tuneInterval);
+            PwmStart(WIFI_IOT_PWM_PORT_PWM0, freqDivisor / 2, freqDivisor);
+            usleep(tuneInterval);//持续响tuneInterval时间，
+            PwmStop(WIFI_IOT_PWM_PORT_PWM0);
+        }
+        usleep(2000*1000);
+    }
+    return NULL;
+}
+
+
+static void StartBeepMusicTask(void)
+{
+    osThreadAttr_t attr;
+    GpioInit();
+    // 蜂鸣器引脚 设置为 PWM功能
+    IoSetFunc(WIFI_IOT_IO_NAME_GPIO_9, WIFI_IOT_IO_FUNC_GPIO_9_PWM0_OUT);
+    PwmInit(WIFI_IOT_PWM_PORT_PWM0);
+    WatchDogDisable();
+
+    //设置新线程属性
+    attr.name = "BeeperMusicTask";
+    attr.attr_bits = 0U;
+    attr.cb_mem = NULL;
+    attr.cb_size = 0U;
+    attr.stack_mem = NULL;
+    attr.stack_size = 1024;
+    attr.priority = osPriorityNormal;
+
+    //创建线程，在新的线程中运行BeeperMusicTask函数
+    if (osThreadNew((osThreadFunc_t)BeeperMusicTask, NULL, &attr) == NULL)
+    {
+        printf("[BeeperMusicTask] Falied to create BeeperMusicTask!\n");
+    }
+}
+
+SYS_RUN(StartBeepMusicTask);
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/led_demo.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/led_demo.c"
new file mode 100644
index 0000000000000000000000000000000000000000..1955f17ead121427d912194666f6bcedba63c662
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/led_demo.c"
@@ -0,0 +1,27 @@
+#include <stdio.h>
+#include "ohos_init.h"
+#include <unistd.h>
+#include "wifiiot_gpio.h"
+#include "wifiiot_gpio_ex.h"
+#include "ohos_types.h"
+void leddemo(void)
+{
+    GpioInit(); //初始化GPIO设备，使用GPIO管脚前调用
+
+    //设置GPIO_9功能为IO
+    IoSetFunc(WIFI_IOT_IO_NAME_GPIO_9, WIFI_IOT_IO_FUNC_GPIO_9_GPIO);
+    //设置GPIO_9的为输出
+    GpioSetDir(WIFI_IOT_IO_NAME_GPIO_9, WIFI_IOT_GPIO_DIR_OUT);
+    //设置GPIO_9输出值为低电平。值为0
+    GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_9, WIFI_IOT_GPIO_EDGE_FALL_LEVEL_LOW);
+
+    printf("led 点亮\n");//在终端打印LED状态
+
+    usleep(4000000);//等待4秒
+
+    //设置GPIO_9输出值为高电平，LED熄灭
+    GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_9, WIFI_IOT_GPIO_EDGE_RISE_LEVEL_HIGH);
+    printf("led 熄灭\n");
+   
+}
+SYS_RUN(leddemo);//注册leddemo函数在启动阶段运行
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/traffic_light_demo.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/traffic_light_demo.c"
new file mode 100644
index 0000000000000000000000000000000000000000..8a342320f7e5b777897ead861f74d54151f200aa
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_03/traffic_light_demo.c"
@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <unistd.h>
+
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include "wifiiot_gpio.h"
+#include "wifiiot_gpio_ex.h"
+
+//对GPIO管脚进行初始化
+void init(void)
+{
+    GpioInit();
+    IoSetFunc(WIFI_IOT_IO_NAME_GPIO_10, WIFI_IOT_IO_FUNC_GPIO_10_GPIO);
+    GpioSetDir(WIFI_IOT_IO_NAME_GPIO_10, WIFI_IOT_GPIO_DIR_OUT);
+
+    IoSetFunc(WIFI_IOT_IO_NAME_GPIO_11, WIFI_IOT_IO_FUNC_GPIO_11_GPIO);
+    GpioSetDir(WIFI_IOT_IO_NAME_GPIO_11, WIFI_IOT_GPIO_DIR_OUT);
+
+    IoSetFunc(WIFI_IOT_IO_NAME_GPIO_12, WIFI_IOT_IO_FUNC_GPIO_12_GPIO);
+    GpioSetDir(WIFI_IOT_IO_NAME_GPIO_12, WIFI_IOT_GPIO_DIR_OUT);
+}
+
+static void StartTrafficLightTask(void)
+{
+    init();
+    while (1)
+    {
+        //绿灯亮
+        GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_11, WIFI_IOT_GPIO_VALUE1);
+        usleep(3000 * 1000);
+        //绿灯灭、黄灯亮
+        GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_11, WIFI_IOT_GPIO_VALUE0);
+        GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_12, WIFI_IOT_GPIO_VALUE1);
+        usleep(1000 * 1000);
+        //黄灯灭、红灯这
+        GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_12, WIFI_IOT_GPIO_VALUE0);
+        GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_10, WIFI_IOT_GPIO_VALUE1);
+        usleep(3000 * 1000);//10红灯
+        GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_10, WIFI_IOT_GPIO_VALUE0);
+    }
+}
+
+APP_FEATURE_INIT(StartTrafficLightTask);  //注册StartTrafficLightTask函数为系统启动后运行
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/BUILD.gn" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/BUILD.gn"
new file mode 100644
index 0000000000000000000000000000000000000000..8616076a00888599c0841f1129a7d148a13f6f87
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/BUILD.gn"
@@ -0,0 +1,15 @@
+
+static_library("sensing_demo") {
+    sources = [
+        # "aht20_demo.c","aht20.c",
+        # "mq2_demo.c"
+    #    "oled_demo.c", "oled_ssd1306.c",
+         "enrionment_demo.c", "oled_ssd1306.c", "aht20.c"
+    ]
+
+    include_dirs = [
+        "//utils/native/lite/include",
+        "//kernel/liteos_m/components/cmsis/2.0",
+        "//base/iot_hardware/interfaces/kits/wifiiot_lite",
+    ]
+}
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/README.md" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/README.md"
new file mode 100644
index 0000000000000000000000000000000000000000..242a5a78092664a6df967ae5df14fb94a10b6dd8
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/README.md"
@@ -0,0 +1,106 @@
+# Harmony OS物联网应用开发实战 第三章
+
+**本节课程中主要介绍如何在HiSpark WiFi IoT套件上使用Hamony OS的传感器相关编程接口，即环境感知能力。**
+
+
+
+## 相关知识点
+
+本节涉及Harmony OS外设相关接口：
+
+* ADC接口
+
+  * `wifiiot_adc.h` 头文件
+
+  * ```c
+    unsigned int AdcRead(WifiIotAdcChannelIndex channel, unsigned short *data, WifiIotAdcEquModelSel equModel,
+                         WifiIotAdcCurBais curBais, unsigned short rstCnt);
+    ```
+
+* I2C接口
+
+  * `wifiiot_i2c.h`头文件
+  * `I2cInit`/`I2cDeinit`/`I2cRead`/`I2cWrite`
+
+
+
+## 外设与主控芯片引脚的对应关系
+
+* HiSpark Wi-Fi IoT 开发套件 炫彩灯板
+
+  * 三色LED——PWM占空比控制颜色
+    * GPIO10: 红
+    * GPIO11: 绿
+    * GPIO12: 蓝
+  * 光敏电阻——ADC采集值和电压对应，电压和电阻对应，电阻和光照强度对应
+    * GPIO09: ADC4
+  * 人体红外传感器——ADC采集值反应是否有人靠近
+    * GPIO07: ADC3
+
+* HiSpark Wi-Fi IoT 开发套件 OLED屏板
+
+  * OLED屏——SSD1306芯片，I2C总线， 地址 0x78
+    * GPIO13: I2C0_SDA
+    * GPIO14: I2C0_SCL
+  * 两个按键——ADC，接在同一个GPIO引脚上，通过电压区分
+    * GPIO05: ADC2
+
+* HiSpark Wi-Fi IoT 开发套件 环境检测板
+
+  * 蜂鸣器——PWM控制声音的评率和音量
+
+    * GPIO09: PWM0
+
+  * MQ2 燃气传感器——ADC读取模拟值
+
+    * GPIO11: ADC5
+
+  * AHT20 温湿度传感器——I2C接口通信，地址 0x38
+
+    * GPIO13: I2C0_SDA
+    * GPIO14: I2C0_SCL
+
+    
+
+## 如何编译
+
+1. 将此目录下的所有`.c`文件和`BUILD.gn`文件拷贝到，openharmony源码的`applications\sample\wifi-iot\app\iothardware`目录下，
+
+2. 修改openharmony源码的`applications\sample\wifi-iot\app\BUILD.gn`文件，将其中的 `features` 改为：
+
+   ```python
+       features = [
+           "iothardware:sensing_demo",
+       ]
+   ```
+
+3. 修改`applications\sample\wifi-iot\app\iothardware\BUILD.gn` 中的`solo_demo`下的`sources`属性，放开其中的的一个文件的注释，以开启选择对应功能文件；
+
+   ```python
+       sources = [
+           "colorful_light_demo.c",
+           # "enrionment_demo.c",
+           # "oled_demo.c", "oled_ssd1306.c"
+       ]
+   ```
+
+4. 在openharmony源码顶层目录执行：`python build.py wifiiot`
+
+
+
+### 报错解决
+
+1. 编译过程中报错：undefined reference to `hi_pwm_init` 等几个 `hi_pwm_`开头的函数，
+   * **原因：** 因为默认情况下，hi3861_sdk中，PWM的CONFIG选项没有打开
+   * **解决：** 修改`vendor\hisi\hi3861\hi3861\build\config\usr_config.mk`文件中的`CONFIG_PWM_SUPPORT`行：
+     * `# CONFIG_PWM_SUPPORT is not set`修改为`CONFIG_PWM_SUPPORT=y`
+
+2. 编译过程中报错：undefined reference to `hi_i2c_init` 等几个 `hi_i2c_`开头的函数，
+
+   * **原因：** 因为默认情况下，hi3861_sdk中，I2C的CONFIG选项没有打开
+
+   * **解决：** 修改`vendor\hisi\hi3861\hi3861\build\config\usr_config.mk`文件中的`CONFIG_I2C_SUPPORT`行：
+     * `# CONFIG_I2C_SUPPORT is not set`修改为`CONFIG_I2C_SUPPORT=y`
+
+
+
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/aht20.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/aht20.c"
new file mode 100644
index 0000000000000000000000000000000000000000..40bc6efb141423d80705a21e505c86e77a69cc1a
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/aht20.c"
@@ -0,0 +1,189 @@
+#include "aht20.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "wifiiot_i2c.h"
+#include "wifiiot_errno.h"
+
+#define AHT20_I2C_IDX WIFI_IOT_I2C_IDX_0
+
+#define AHT20_STARTUP_TIME     20*1000 // 上电启动时间
+#define AHT20_CALIBRATION_TIME 40*1000 // 初始化（校准）时间
+#define AHT20_MEASURE_TIME     75*1000 // 测量时间
+
+#define AHT20_DEVICE_ADDR   0x38
+#define AHT20_READ_ADDR     ((0x38<<1)|0x1)
+#define AHT20_WRITE_ADDR    ((0x38<<1)|0x0)
+
+#define AHT20_CMD_CALIBRATION       0xBE // 初始化（校准）命令
+#define AHT20_CMD_CALIBRATION_ARG0  0x08
+#define AHT20_CMD_CALIBRATION_ARG1  0x00
+
+/**
+ * 传感器在采集时需要时间,主机发出测量指令（0xAC）后，延时75毫秒以上再读取转换后的数据并判断返回的状态位是否正常。
+ * 若状态比特位[Bit7]为0代表数据可正常读取，为1时传感器为忙状态，主机需要等待数据处理完成。
+ **/
+#define AHT20_CMD_TRIGGER       0xAC // 触发测量命令
+#define AHT20_CMD_TRIGGER_ARG0  0x33
+#define AHT20_CMD_TRIGGER_ARG1  0x00
+
+// 用于在无需关闭和再次打开电源的情况下，重新启动传感器系统，软复位所需时间不超过20 毫秒
+#define AHT20_CMD_RESET      0xBA // 软复位命令
+
+#define AHT20_CMD_STATUS     0x71 // 获取状态命令
+
+/**
+ * STATUS 命令回复：
+ * 1. 初始化后触发测量之前，STATUS 只回复 1B 状态值；
+ * 2. 触发测量之后，STATUS 回复6B： 1B 状态值 + 2B 湿度 + 4b湿度 + 4b温度 + 2B 温度
+ *      RH = Srh / 2^20 * 100%
+ *      T  = St  / 2^20 * 200 - 50
+ **/
+#define AHT20_STATUS_BUSY_SHIFT 7       // bit[7] Busy indication
+#define AHT20_STATUS_BUSY_MASK  (0x1<<AHT20_STATUS_BUSY_SHIFT)
+#define AHT20_STATUS_BUSY(status) ((status & AHT20_STATUS_BUSY_MASK) >> AHT20_STATUS_BUSY_SHIFT)
+
+#define AHT20_STATUS_MODE_SHIFT 5       // bit[6:5] Mode Status
+#define AHT20_STATUS_MODE_MASK  (0x3<<AHT20_STATUS_MODE_SHIFT)
+#define AHT20_STATUS_MODE(status) ((status & AHT20_STATUS_MODE_MASK) >> AHT20_STATUS_MODE_SHIFT)
+
+                                        // bit[4] Reserved
+#define AHT20_STATUS_CALI_SHIFT 3       // bit[3] CAL Enable
+#define AHT20_STATUS_CALI_MASK  (0x1<<AHT20_STATUS_CALI_SHIFT)
+#define AHT20_STATUS_CALI(status) ((status & AHT20_STATUS_CALI_MASK) >> AHT20_STATUS_CALI_SHIFT)
+                                        // bit[2:0] Reserved
+
+#define AHT20_STATUS_RESPONSE_MAX 6
+
+#define AHT20_RESLUTION            (1<<20)  // 2^20
+
+#define AHT20_MAX_RETRY 10
+
+static uint32_t AHT20_Read(uint8_t* buffer, uint32_t buffLen)
+{
+    WifiIotI2cData data = { 0 };
+    data.receiveBuf = buffer;
+    data.receiveLen = buffLen;
+    uint32_t retval = I2cRead(AHT20_I2C_IDX, AHT20_READ_ADDR, &data);
+    if (retval != WIFI_IOT_SUCCESS) {
+        printf("I2cRead() failed, %0X!\n", retval);
+        return retval;
+    }
+    return WIFI_IOT_SUCCESS;
+}
+
+static uint32_t AHT20_Write(uint8_t* buffer, uint32_t buffLen)
+{
+    WifiIotI2cData data = { 0 };
+    data.sendBuf = buffer;
+    data.sendLen = buffLen;
+    uint32_t retval = I2cWrite(AHT20_I2C_IDX, AHT20_WRITE_ADDR, &data);
+    if (retval != WIFI_IOT_SUCCESS) {
+        printf("I2cWrite(%02X) failed, %0X!\n", buffer[0], retval);
+        return retval;
+    }
+    return WIFI_IOT_SUCCESS;
+}
+
+// 发送获取状态命令
+static uint32_t AHT20_StatusCommand(void)
+{
+    uint8_t statusCmd[] = { AHT20_CMD_STATUS };
+    return AHT20_Write(statusCmd, sizeof(statusCmd));
+}
+
+// 发送软复位命令
+static uint32_t AHT20_ResetCommand(void)
+{
+    uint8_t resetCmd[] = {AHT20_CMD_RESET};
+    return AHT20_Write(resetCmd, sizeof(resetCmd));
+}
+
+// 发送初始化校准命令
+static uint32_t AHT20_CalibrateCommand(void)
+{
+    uint8_t clibrateCmd[] = {AHT20_CMD_CALIBRATION, AHT20_CMD_CALIBRATION_ARG0, AHT20_CMD_CALIBRATION_ARG1};
+    return AHT20_Write(clibrateCmd, sizeof(clibrateCmd));
+}
+
+// 读取温湿度值之前， 首先要看状态字的校准使能位Bit[3]是否为 1(通过发送0x71可以获取一个字节的状态字)，
+// 如果不为1，要发送0xBE命令(初始化)，此命令参数有两个字节， 第一个字节为0x08，第二个字节为0x00。
+uint32_t AHT20_Calibrate(void)
+{
+    uint32_t retval = 0;
+    uint8_t buffer[AHT20_STATUS_RESPONSE_MAX] = { AHT20_CMD_STATUS };
+    memset(&buffer, 0x0, sizeof(buffer));
+
+    retval = AHT20_StatusCommand();
+    if (retval != WIFI_IOT_SUCCESS) {
+        return retval;
+    }
+
+    retval = AHT20_Read(buffer, sizeof(buffer));
+    if (retval != WIFI_IOT_SUCCESS) {
+        return retval;
+    }
+
+    if (AHT20_STATUS_BUSY(buffer[0]) || !AHT20_STATUS_CALI(buffer[0])) {
+        retval = AHT20_ResetCommand();
+        if (retval != WIFI_IOT_SUCCESS) {
+            return retval;
+        }
+        usleep(AHT20_STARTUP_TIME);
+        retval = AHT20_CalibrateCommand();
+        usleep(AHT20_CALIBRATION_TIME);
+        return retval;
+    }
+
+    return WIFI_IOT_SUCCESS;
+}
+
+// 发送 触发测量 命令，开始测量
+uint32_t AHT20_StartMeasure(void)
+{
+    uint8_t triggerCmd[] = {AHT20_CMD_TRIGGER, AHT20_CMD_TRIGGER_ARG0, AHT20_CMD_TRIGGER_ARG1};
+    return AHT20_Write(triggerCmd, sizeof(triggerCmd));
+}
+
+// 接收测量结果，拼接转换为标准值
+uint32_t AHT20_GetMeasureResult(float* temp, float* humi)
+{
+    uint32_t retval = 0, i = 0;
+    if (temp == NULL || humi == NULL) {
+        return WIFI_IOT_FAILURE;
+    }
+
+    uint8_t buffer[AHT20_STATUS_RESPONSE_MAX] = { 0 };
+    memset(&buffer, 0x0, sizeof(buffer));
+    retval = AHT20_Read(buffer, sizeof(buffer));  // recv status command result
+    if (retval != WIFI_IOT_SUCCESS) {
+        return retval;
+    }
+
+    for (i = 0; AHT20_STATUS_BUSY(buffer[0]) && i < AHT20_MAX_RETRY; i++) {
+        // printf("AHT20 device busy, retry %d/%d!\r\n", i, AHT20_MAX_RETRY);
+        usleep(AHT20_MEASURE_TIME);
+        retval = AHT20_Read(buffer, sizeof(buffer));  // recv status command result
+        if (retval != WIFI_IOT_SUCCESS) {
+            return retval;
+        }
+    }
+    if (i >= AHT20_MAX_RETRY) {
+        printf("AHT20 device always busy!\r\n");
+        return WIFI_IOT_FAILURE;
+    }
+
+    uint32_t humiRaw = buffer[1];
+    humiRaw = (humiRaw << 8) | buffer[2];
+    humiRaw = (humiRaw << 4) | ((buffer[3] & 0xF0) >> 4);
+    *humi = humiRaw / (float)AHT20_RESLUTION * 100;
+
+    uint32_t tempRaw = buffer[3] & 0x0F;
+    tempRaw = (tempRaw << 8) | buffer[4];
+    tempRaw = (tempRaw << 8) | buffer[5];
+    *temp = tempRaw / (float)AHT20_RESLUTION * 200 - 50;
+    // printf("humi = %05X, %f, temp= %05X, %f\r\n", humiRaw, *humi, tempRaw, *temp);
+    return WIFI_IOT_SUCCESS;
+}
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/aht20.h" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/aht20.h"
new file mode 100644
index 0000000000000000000000000000000000000000..5ee89f2ecb4daf6cd3541aa01c6eebae2db88423
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/aht20.h"
@@ -0,0 +1,14 @@
+
+
+#ifndef AHT20_H
+#define AHT20_H
+
+#include <stdint.h>
+// 发送初始化校准命令
+uint32_t AHT20_Calibrate(void);
+// 发送 触发测量 命令，开始测量
+uint32_t AHT20_StartMeasure(void);
+// 接收测量结果，拼接转换为标准值
+uint32_t AHT20_GetMeasureResult(float* temp, float* humi);
+
+#endif  // AHT20_H
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/aht20_demo.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/aht20_demo.c"
new file mode 100644
index 0000000000000000000000000000000000000000..8c76b0a8a4805e52dc690aceb3c98c14459a46c1
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/aht20_demo.c"
@@ -0,0 +1,67 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include "wifiiot_i2c.h"
+#include "wifiiot_gpio.h"
+#include "wifiiot_gpio_ex.h"
+#include "wifiiot_errno.h"
+#include "aht20.h"
+
+#define AHT20_BAUDRATE 400 * 1000
+#define AHT20_I2C_IDX WIFI_IOT_I2C_IDX_0
+
+void init(void)
+{
+    GpioInit();
+    IoSetFunc(WIFI_IOT_IO_NAME_GPIO_13, WIFI_IOT_IO_FUNC_GPIO_13_I2C0_SDA);
+    IoSetFunc(WIFI_IOT_IO_NAME_GPIO_14, WIFI_IOT_IO_FUNC_GPIO_14_I2C0_SCL);
+    I2cInit(AHT20_I2C_IDX, AHT20_BAUDRATE);
+}
+
+static void AhtDemoTask(void *arg){
+    (void)arg;
+    init();//初始化IIC
+    uint32_t retval = 0;
+    float humidity = 0.0f;
+    float temperature = 0.0f;
+        // 发送初始化校准命令
+    while (WIFI_IOT_SUCCESS != AHT20_Calibrate()){
+        printf("AHT20 sensor init failed!\r\n");
+        usleep(1000);
+    }
+    while (1){
+        // 发送 触发测量 命令，开始测量
+        retval = AHT20_StartMeasure();
+        if (retval != WIFI_IOT_SUCCESS){
+            printf("trigger measure failed!\r\n");
+        }else {
+            // 接收测量结果，拼接转换为标准值
+            retval = AHT20_GetMeasureResult(&temperature, &humidity);
+            printf("temp: %.2f,  humi: %.2f\n", temperature, humidity);
+        }
+        sleep(1);
+    }
+}
+
+static void AhtDemo(void){
+    osThreadAttr_t attr;
+    
+    attr.name = "AhtDemoTask";
+    attr.attr_bits = 0U;
+    attr.cb_mem = NULL;
+    attr.cb_size = 0U;
+    attr.stack_mem = NULL;
+    attr.stack_size = 4096;
+    attr.priority = osPriorityNormal;
+
+    if (osThreadNew(AhtDemoTask, NULL, &attr) == NULL)
+    {
+        printf("[EnvironmentDemo] Falied to create AhtDemoTask!\n");
+    }
+}
+
+APP_FEATURE_INIT(AhtDemo);
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/enrionment_demo.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/enrionment_demo.c"
new file mode 100644
index 0000000000000000000000000000000000000000..abfd0c322ff2ec0a6affbc63543fb017e1679c07
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/enrionment_demo.c"
@@ -0,0 +1,95 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include "wifiiot_i2c.h"
+#include "wifiiot_gpio.h"
+#include "wifiiot_gpio_ex.h"
+#include "wifiiot_adc.h"
+#include "wifiiot_errno.h"
+
+#include "aht20.h"
+#include "oled_ssd1306.h"
+
+#define GAS_SENSOR_CHAN_NAME WIFI_IOT_ADC_CHANNEL_5
+#define AHT20_BAUDRATE 400 * 1000
+#define AHT20_I2C_IDX WIFI_IOT_I2C_IDX_0
+#define ADC_RESOLUTION 2048
+
+uint32_t retval = 0;
+float humidity = 0.0f;  //湿度
+float temperature = 0.0f;   //温度
+unsigned short data = 0;   
+static char line[32] = {0};   
+
+//初始化函数
+void init(void)
+{
+    GpioInit();
+    OledInit();
+    OledFillScreen(0);
+    I2cInit(AHT20_I2C_IDX, AHT20_BAUDRATE);
+
+    while (WIFI_IOT_SUCCESS != AHT20_Calibrate())
+    {
+        printf("AHT20 sensor init failed!\r\n");
+        usleep(1000);
+    }
+}
+
+//综合业务函数 
+static void EnvironmentTask(void *arg)
+{
+    (void)arg;
+    init();
+    while (1){
+        // 发送 触发测量 命令，开始测量
+        if (AHT20_StartMeasure() != WIFI_IOT_SUCCESS){
+            printf("trigger measure failed!\r\n");
+        }
+        // 接收测量结果，拼接转换为标准值
+        if (AHT20_GetMeasureResult(&temperature, &humidity) != WIFI_IOT_SUCCESS){
+            printf("get humidity data failed!\r\n");
+        }
+        //读取可燃气体值
+        AdcRead(GAS_SENSOR_CHAN_NAME, &data, WIFI_IOT_ADC_EQU_MODEL_4, WIFI_IOT_ADC_CUR_BAIS_DEFAULT, 0);
+        //在（0，0）位置显示字符串"Sensor values:",字体为6x8点阵
+        OledShowString(0, 0, "Sensor values:", 1);
+
+        //组装显示温度的字符串
+        snprintf(line, sizeof(line), "temp: %.2f", temperature);
+        OledShowString(0, 1, line, 1);//在（0，1）位置显示组装后的温度字符串
+
+        //组装显示湿度的字符串
+        snprintf(line, sizeof(line), "humi: %.2f", humidity);
+        OledShowString(0, 2, line, 1);//在（0，2）位置显示组装后的湿度字符串
+
+        //组装显示气体的字符串
+        snprintf(line, sizeof(line), "gas: %d", data);
+        OledShowString(0, 3, line, 1);//在（0，3）位置显示组装后的气体字符串
+        sleep(1);//睡眠1秒
+    }
+}
+
+//创建新线程运行EnvironmentTask函数
+static void EnvironmentDemo(void)
+{
+    osThreadAttr_t attr;
+    attr.name = "EnvironmentTask";
+    attr.attr_bits = 0U;
+    attr.cb_mem = NULL;
+    attr.cb_size = 0U;
+    attr.stack_mem = NULL;
+    attr.stack_size = 4096;
+    attr.priority = osPriorityNormal;
+
+    if (osThreadNew(EnvironmentTask, NULL, &attr) == NULL)
+    {
+        printf("[EnvironmentDemo] Falied to create EnvironmentTask!\n");
+    }
+}
+
+APP_FEATURE_INIT(EnvironmentDemo);//注册为自启动运行
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/mq2_demo.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/mq2_demo.c"
new file mode 100644
index 0000000000000000000000000000000000000000..8a5362ea45fd6b00deabfe54ef70d2e54ed47451
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/mq2_demo.c"
@@ -0,0 +1,50 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include "wifiiot_gpio.h"
+#include "wifiiot_gpio_ex.h"
+#include "wifiiot_adc.h"
+#include "wifiiot_errno.h"
+
+#define GAS_SENSOR_CHAN_NAME WIFI_IOT_ADC_CHANNEL_5
+// #define GAS_SENSOR_PIN_NAME WIFI_IOT_IO_NAME_GPIO_11
+
+static void Mq2DemoTask(void *arg)
+{
+    (void)arg;
+    GpioInit();
+    while (1)
+    {
+
+        unsigned short data = 0;
+        
+        if (AdcRead(GAS_SENSOR_CHAN_NAME, &data, WIFI_IOT_ADC_EQU_MODEL_4, WIFI_IOT_ADC_CUR_BAIS_DEFAULT, 0) == WIFI_IOT_SUCCESS)
+        {
+            printf("gas:%d ppm\n", data);
+        }
+
+        sleep(1);
+    }
+}
+
+static void Mq2Demo(void)
+{
+    osThreadAttr_t attr;
+    attr.name = "Mq2DemoTask";
+    attr.attr_bits = 0U;
+    attr.cb_mem = NULL;
+    attr.cb_size = 0U;
+    attr.stack_mem = NULL;
+    attr.stack_size = 4096;
+    attr.priority = osPriorityNormal;
+    if (osThreadNew(Mq2DemoTask, NULL, &attr) == NULL)
+    {
+        printf("[EnvironmentDemo] Falied to create EnvironmentTask!\n");
+    }
+}
+
+APP_FEATURE_INIT(Mq2Demo);
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/oled_demo.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/oled_demo.c"
new file mode 100644
index 0000000000000000000000000000000000000000..ad48d0cb845c96fdaf33b78632b01df2a8704b91
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/oled_demo.c"
@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <unistd.h>
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include "wifiiot_gpio.h"
+#include "wifiiot_gpio_ex.h"
+#include "oled_ssd1306.h"
+
+//该函数对GPIO管脚及OLED进行初始化
+void init(void)
+{
+    GpioInit();
+    OledInit();
+}
+
+//业务函数，完成数据在OLED上显示
+static void OledTask(void *arg)
+{
+    (void)arg;
+    init(); //初始化
+    OledFillScreen(0x00);//清屏，
+    //在左上角位置显示字符串Hello, HarmonyOS
+    OledShowString(0, 0, "Hello, HarmonyOS", 1);
+    sleep(1);//等待1秒
+
+    //循环3次显示
+    for (int i = 0; i < 3; i++)
+    {
+        OledFillScreen(0x00);//清屏
+        for (int y = 0; y < 8; y++)
+        {//设置每行显示的字符串
+            static const char text[] = "ABCDEFGHIJKLMNOP"; // QRSTUVWXYZ
+            OledShowString(0, y, text, 1);//在(0,y)位置显示字符串
+        }
+        sleep(1);//等待1秒，
+    }
+}
+
+//创建新线程运行OledTask函数
+static void OledDemo(void)
+{
+    osThreadAttr_t attr;
+    attr.name = "OledTask";
+    attr.attr_bits = 0U;
+    attr.cb_mem = NULL;
+    attr.cb_size = 0U;
+    attr.stack_mem = NULL;
+    attr.stack_size = 4096;
+    attr.priority = osPriorityNormal;
+    if (osThreadNew(OledTask, NULL, &attr) == NULL)
+    {
+        printf("[OledDemo] Falied to create OledTask!\n");
+    }
+}
+APP_FEATURE_INIT(OledDemo);
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/oled_fonts.h" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/oled_fonts.h"
new file mode 100644
index 0000000000000000000000000000000000000000..f0b342bae64184e20eea8af14c4c357e6cb71445
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/oled_fonts.h"
@@ -0,0 +1,201 @@
+#ifndef OLOED_FONTS_H
+#define OLOED_FONTS_H
+
+/*****************6*8的点阵********************/
+static unsigned char F6x8[][6] =
+{
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // sp
+    { 0x00, 0x00, 0x00, 0x2f, 0x00, 0x00 }, // !
+    { 0x00, 0x00, 0x07, 0x00, 0x07, 0x00 }, // "
+    { 0x00, 0x14, 0x7f, 0x14, 0x7f, 0x14 }, // #
+    { 0x00, 0x24, 0x2a, 0x7f, 0x2a, 0x12 }, // $
+    { 0x00, 0x62, 0x64, 0x08, 0x13, 0x23 }, // %
+    { 0x00, 0x36, 0x49, 0x55, 0x22, 0x50 }, // &
+    { 0x00, 0x00, 0x05, 0x03, 0x00, 0x00 }, // '
+    { 0x00, 0x00, 0x1c, 0x22, 0x41, 0x00 }, // (
+    { 0x00, 0x00, 0x41, 0x22, 0x1c, 0x00 }, // )
+    { 0x00, 0x14, 0x08, 0x3E, 0x08, 0x14 }, // *
+    { 0x00, 0x08, 0x08, 0x3E, 0x08, 0x08 }, // +
+    { 0x00, 0x00, 0x00, 0xA0, 0x60, 0x00 }, // ,
+    { 0x00, 0x08, 0x08, 0x08, 0x08, 0x08 }, // -
+    { 0x00, 0x00, 0x60, 0x60, 0x00, 0x00 }, // .
+    { 0x00, 0x20, 0x10, 0x08, 0x04, 0x02 }, // /
+    { 0x00, 0x3E, 0x51, 0x49, 0x45, 0x3E }, // 0
+    { 0x00, 0x00, 0x42, 0x7F, 0x40, 0x00 }, // 1
+    { 0x00, 0x42, 0x61, 0x51, 0x49, 0x46 }, // 2
+    { 0x00, 0x21, 0x41, 0x45, 0x4B, 0x31 }, // 3
+    { 0x00, 0x18, 0x14, 0x12, 0x7F, 0x10 }, // 4
+    { 0x00, 0x27, 0x45, 0x45, 0x45, 0x39 }, // 5
+    { 0x00, 0x3C, 0x4A, 0x49, 0x49, 0x30 }, // 6
+    { 0x00, 0x01, 0x71, 0x09, 0x05, 0x03 }, // 7
+    { 0x00, 0x36, 0x49, 0x49, 0x49, 0x36 }, // 8
+    { 0x00, 0x06, 0x49, 0x49, 0x29, 0x1E }, // 9
+    { 0x00, 0x00, 0x36, 0x36, 0x00, 0x00 }, // :
+    { 0x00, 0x00, 0x56, 0x36, 0x00, 0x00 }, // ;
+    { 0x00, 0x08, 0x14, 0x22, 0x41, 0x00 }, // <
+    { 0x00, 0x14, 0x14, 0x14, 0x14, 0x14 }, // =
+    { 0x00, 0x00, 0x41, 0x22, 0x14, 0x08 }, // >
+    { 0x00, 0x02, 0x01, 0x51, 0x09, 0x06 }, // ?
+    { 0x00, 0x32, 0x49, 0x59, 0x51, 0x3E }, // @
+    { 0x00, 0x7C, 0x12, 0x11, 0x12, 0x7C }, // A
+    { 0x00, 0x7F, 0x49, 0x49, 0x49, 0x36 }, // B
+    { 0x00, 0x3E, 0x41, 0x41, 0x41, 0x22 }, // C
+    { 0x00, 0x7F, 0x41, 0x41, 0x22, 0x1C }, // D
+    { 0x00, 0x7F, 0x49, 0x49, 0x49, 0x41 }, // E
+    { 0x00, 0x7F, 0x09, 0x09, 0x09, 0x01 }, // F
+    { 0x00, 0x3E, 0x41, 0x49, 0x49, 0x7A }, // G
+    { 0x00, 0x7F, 0x08, 0x08, 0x08, 0x7F }, // H
+    { 0x00, 0x00, 0x41, 0x7F, 0x41, 0x00 }, // I
+    { 0x00, 0x20, 0x40, 0x41, 0x3F, 0x01 }, // J
+    { 0x00, 0x7F, 0x08, 0x14, 0x22, 0x41 }, // K
+    { 0x00, 0x7F, 0x40, 0x40, 0x40, 0x40 }, // L
+    { 0x00, 0x7F, 0x02, 0x0C, 0x02, 0x7F }, // M
+    { 0x00, 0x7F, 0x04, 0x08, 0x10, 0x7F }, // N
+    { 0x00, 0x3E, 0x41, 0x41, 0x41, 0x3E }, // O
+    { 0x00, 0x7F, 0x09, 0x09, 0x09, 0x06 }, // P
+    { 0x00, 0x3E, 0x41, 0x51, 0x21, 0x5E }, // Q
+    { 0x00, 0x7F, 0x09, 0x19, 0x29, 0x46 }, // R
+    { 0x00, 0x46, 0x49, 0x49, 0x49, 0x31 }, // S
+    { 0x00, 0x01, 0x01, 0x7F, 0x01, 0x01 }, // T
+    { 0x00, 0x3F, 0x40, 0x40, 0x40, 0x3F }, // U
+    { 0x00, 0x1F, 0x20, 0x40, 0x20, 0x1F }, // V
+    { 0x00, 0x3F, 0x40, 0x38, 0x40, 0x3F }, // W
+    { 0x00, 0x63, 0x14, 0x08, 0x14, 0x63 }, // X
+    { 0x00, 0x07, 0x08, 0x70, 0x08, 0x07 }, // Y
+    { 0x00, 0x61, 0x51, 0x49, 0x45, 0x43 }, // Z
+    { 0x00, 0x00, 0x7F, 0x41, 0x41, 0x00 }, // [
+    { 0x00, 0x55, 0x2A, 0x55, 0x2A, 0x55 }, // 55
+    { 0x00, 0x00, 0x41, 0x41, 0x7F, 0x00 }, // ]
+    { 0x00, 0x04, 0x02, 0x01, 0x02, 0x04 }, // ^
+    { 0x00, 0x40, 0x40, 0x40, 0x40, 0x40 }, // _
+    { 0x00, 0x00, 0x01, 0x02, 0x04, 0x00 }, // '
+    { 0x00, 0x20, 0x54, 0x54, 0x54, 0x78 }, // a
+    { 0x00, 0x7F, 0x48, 0x44, 0x44, 0x38 }, // b
+    { 0x00, 0x38, 0x44, 0x44, 0x44, 0x20 }, // c
+    { 0x00, 0x38, 0x44, 0x44, 0x48, 0x7F }, // d
+    { 0x00, 0x38, 0x54, 0x54, 0x54, 0x18 }, // e
+    { 0x00, 0x08, 0x7E, 0x09, 0x01, 0x02 }, // f
+    { 0x00, 0x18, 0xA4, 0xA4, 0xA4, 0x7C }, // g
+    { 0x00, 0x7F, 0x08, 0x04, 0x04, 0x78 }, // h
+    { 0x00, 0x00, 0x44, 0x7D, 0x40, 0x00 }, // i
+    { 0x00, 0x40, 0x80, 0x84, 0x7D, 0x00 }, // j
+    { 0x00, 0x7F, 0x10, 0x28, 0x44, 0x00 }, // k
+    { 0x00, 0x00, 0x41, 0x7F, 0x40, 0x00 }, // l
+    { 0x00, 0x7C, 0x04, 0x18, 0x04, 0x78 }, // m
+    { 0x00, 0x7C, 0x08, 0x04, 0x04, 0x78 }, // n
+    { 0x00, 0x38, 0x44, 0x44, 0x44, 0x38 }, // o
+    { 0x00, 0xFC, 0x24, 0x24, 0x24, 0x18 }, // p
+    { 0x00, 0x18, 0x24, 0x24, 0x18, 0xFC }, // q
+    { 0x00, 0x7C, 0x08, 0x04, 0x04, 0x08 }, // r
+    { 0x00, 0x48, 0x54, 0x54, 0x54, 0x20 }, // s
+    { 0x00, 0x04, 0x3F, 0x44, 0x40, 0x20 }, // t
+    { 0x00, 0x3C, 0x40, 0x40, 0x20, 0x7C }, // u
+    { 0x00, 0x1C, 0x20, 0x40, 0x20, 0x1C }, // v
+    { 0x00, 0x3C, 0x40, 0x30, 0x40, 0x3C }, // w
+    { 0x00, 0x44, 0x28, 0x10, 0x28, 0x44 }, // x
+    { 0x00, 0x1C, 0xA0, 0xA0, 0xA0, 0x7C }, // y
+    { 0x00, 0x44, 0x64, 0x54, 0x4C, 0x44 }, // z
+    { 0x14, 0x14, 0x14, 0x14, 0x14, 0x14 }, // horiz lines
+};
+
+/****************************************8*16的点阵************************************/
+static const unsigned char F8X16[]=
+{
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,// 0
+    0x00,0x00,0x00,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x33,0x30,0x00,0x00,0x00,//! 1
+    0x00,0x10,0x0C,0x06,0x10,0x0C,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//" 2
+    0x40,0xC0,0x78,0x40,0xC0,0x78,0x40,0x00,0x04,0x3F,0x04,0x04,0x3F,0x04,0x04,0x00,//# 3
+    0x00,0x70,0x88,0xFC,0x08,0x30,0x00,0x00,0x00,0x18,0x20,0xFF,0x21,0x1E,0x00,0x00,//$ 4
+    0xF0,0x08,0xF0,0x00,0xE0,0x18,0x00,0x00,0x00,0x21,0x1C,0x03,0x1E,0x21,0x1E,0x00,//% 5
+    0x00,0xF0,0x08,0x88,0x70,0x00,0x00,0x00,0x1E,0x21,0x23,0x24,0x19,0x27,0x21,0x10,//& 6
+    0x10,0x16,0x0E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//' 7
+    0x00,0x00,0x00,0xE0,0x18,0x04,0x02,0x00,0x00,0x00,0x00,0x07,0x18,0x20,0x40,0x00,//( 8
+    0x00,0x02,0x04,0x18,0xE0,0x00,0x00,0x00,0x00,0x40,0x20,0x18,0x07,0x00,0x00,0x00,//) 9
+    0x40,0x40,0x80,0xF0,0x80,0x40,0x40,0x00,0x02,0x02,0x01,0x0F,0x01,0x02,0x02,0x00,//* 10
+    0x00,0x00,0x00,0xF0,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x1F,0x01,0x01,0x01,0x00,//+ 11
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xB0,0x70,0x00,0x00,0x00,0x00,0x00,//, 12
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,//- 13
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,0x00,0x00,//. 14
+    0x00,0x00,0x00,0x00,0x80,0x60,0x18,0x04,0x00,0x60,0x18,0x06,0x01,0x00,0x00,0x00,/// 15
+    0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x0F,0x10,0x20,0x20,0x10,0x0F,0x00,//0 16
+    0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//1 17
+    0x00,0x70,0x08,0x08,0x08,0x88,0x70,0x00,0x00,0x30,0x28,0x24,0x22,0x21,0x30,0x00,//2 18
+    0x00,0x30,0x08,0x88,0x88,0x48,0x30,0x00,0x00,0x18,0x20,0x20,0x20,0x11,0x0E,0x00,//3 19
+    0x00,0x00,0xC0,0x20,0x10,0xF8,0x00,0x00,0x00,0x07,0x04,0x24,0x24,0x3F,0x24,0x00,//4 20
+    0x00,0xF8,0x08,0x88,0x88,0x08,0x08,0x00,0x00,0x19,0x21,0x20,0x20,0x11,0x0E,0x00,//5 21
+    0x00,0xE0,0x10,0x88,0x88,0x18,0x00,0x00,0x00,0x0F,0x11,0x20,0x20,0x11,0x0E,0x00,//6 22
+    0x00,0x38,0x08,0x08,0xC8,0x38,0x08,0x00,0x00,0x00,0x00,0x3F,0x00,0x00,0x00,0x00,//7 23
+    0x00,0x70,0x88,0x08,0x08,0x88,0x70,0x00,0x00,0x1C,0x22,0x21,0x21,0x22,0x1C,0x00,//8 24
+    0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x00,0x31,0x22,0x22,0x11,0x0F,0x00,//9 25
+    0x00,0x00,0x00,0xC0,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,//: 26
+    0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x60,0x00,0x00,0x00,0x00,//; 27
+    0x00,0x00,0x80,0x40,0x20,0x10,0x08,0x00,0x00,0x01,0x02,0x04,0x08,0x10,0x20,0x00,//< 28
+    0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x00,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x00,//= 29
+    0x00,0x08,0x10,0x20,0x40,0x80,0x00,0x00,0x00,0x20,0x10,0x08,0x04,0x02,0x01,0x00,//> 30
+    0x00,0x70,0x48,0x08,0x08,0x08,0xF0,0x00,0x00,0x00,0x00,0x30,0x36,0x01,0x00,0x00,//? 31
+    0xC0,0x30,0xC8,0x28,0xE8,0x10,0xE0,0x00,0x07,0x18,0x27,0x24,0x23,0x14,0x0B,0x00,//@ 32
+    0x00,0x00,0xC0,0x38,0xE0,0x00,0x00,0x00,0x20,0x3C,0x23,0x02,0x02,0x27,0x38,0x20,//A 33
+    0x08,0xF8,0x88,0x88,0x88,0x70,0x00,0x00,0x20,0x3F,0x20,0x20,0x20,0x11,0x0E,0x00,//B 34
+    0xC0,0x30,0x08,0x08,0x08,0x08,0x38,0x00,0x07,0x18,0x20,0x20,0x20,0x10,0x08,0x00,//C 35
+    0x08,0xF8,0x08,0x08,0x08,0x10,0xE0,0x00,0x20,0x3F,0x20,0x20,0x20,0x10,0x0F,0x00,//D 36
+    0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,0x20,0x3F,0x20,0x20,0x23,0x20,0x18,0x00,//E 37
+    0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,0x20,0x3F,0x20,0x00,0x03,0x00,0x00,0x00,//F 38
+    0xC0,0x30,0x08,0x08,0x08,0x38,0x00,0x00,0x07,0x18,0x20,0x20,0x22,0x1E,0x02,0x00,//G 39
+    0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x20,0x3F,0x21,0x01,0x01,0x21,0x3F,0x20,//H 40
+    0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//I 41
+    0x00,0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,0x00,//J 42
+    0x08,0xF8,0x88,0xC0,0x28,0x18,0x08,0x00,0x20,0x3F,0x20,0x01,0x26,0x38,0x20,0x00,//K 43
+    0x08,0xF8,0x08,0x00,0x00,0x00,0x00,0x00,0x20,0x3F,0x20,0x20,0x20,0x20,0x30,0x00,//L 44
+    0x08,0xF8,0xF8,0x00,0xF8,0xF8,0x08,0x00,0x20,0x3F,0x00,0x3F,0x00,0x3F,0x20,0x00,//M 45
+    0x08,0xF8,0x30,0xC0,0x00,0x08,0xF8,0x08,0x20,0x3F,0x20,0x00,0x07,0x18,0x3F,0x00,//N 46
+    0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x10,0x20,0x20,0x20,0x10,0x0F,0x00,//O 47
+    0x08,0xF8,0x08,0x08,0x08,0x08,0xF0,0x00,0x20,0x3F,0x21,0x01,0x01,0x01,0x00,0x00,//P 48
+    0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x18,0x24,0x24,0x38,0x50,0x4F,0x00,//Q 49
+    0x08,0xF8,0x88,0x88,0x88,0x88,0x70,0x00,0x20,0x3F,0x20,0x00,0x03,0x0C,0x30,0x20,//R 50
+    0x00,0x70,0x88,0x08,0x08,0x08,0x38,0x00,0x00,0x38,0x20,0x21,0x21,0x22,0x1C,0x00,//S 51
+    0x18,0x08,0x08,0xF8,0x08,0x08,0x18,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//T 52
+    0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//U 53
+    0x08,0x78,0x88,0x00,0x00,0xC8,0x38,0x08,0x00,0x00,0x07,0x38,0x0E,0x01,0x00,0x00,//V 54
+    0xF8,0x08,0x00,0xF8,0x00,0x08,0xF8,0x00,0x03,0x3C,0x07,0x00,0x07,0x3C,0x03,0x00,//W 55
+    0x08,0x18,0x68,0x80,0x80,0x68,0x18,0x08,0x20,0x30,0x2C,0x03,0x03,0x2C,0x30,0x20,//X 56
+    0x08,0x38,0xC8,0x00,0xC8,0x38,0x08,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//Y 57
+    0x10,0x08,0x08,0x08,0xC8,0x38,0x08,0x00,0x20,0x38,0x26,0x21,0x20,0x20,0x18,0x00,//Z 58
+    0x00,0x00,0x00,0xFE,0x02,0x02,0x02,0x00,0x00,0x00,0x00,0x7F,0x40,0x40,0x40,0x00,//[ 59
+    0x00,0x0C,0x30,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x06,0x38,0xC0,0x00,//\ 60
+    0x00,0x02,0x02,0x02,0xFE,0x00,0x00,0x00,0x00,0x40,0x40,0x40,0x7F,0x00,0x00,0x00,//] 61
+    0x00,0x00,0x04,0x02,0x02,0x02,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//^ 62
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,//_ 63
+    0x00,0x02,0x02,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//` 64
+    0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x19,0x24,0x22,0x22,0x22,0x3F,0x20,//a 65
+    0x08,0xF8,0x00,0x80,0x80,0x00,0x00,0x00,0x00,0x3F,0x11,0x20,0x20,0x11,0x0E,0x00,//b 66
+    0x00,0x00,0x00,0x80,0x80,0x80,0x00,0x00,0x00,0x0E,0x11,0x20,0x20,0x20,0x11,0x00,//c 67
+    0x00,0x00,0x00,0x80,0x80,0x88,0xF8,0x00,0x00,0x0E,0x11,0x20,0x20,0x10,0x3F,0x20,//d 68
+    0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x1F,0x22,0x22,0x22,0x22,0x13,0x00,//e 69
+    0x00,0x80,0x80,0xF0,0x88,0x88,0x88,0x18,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//f 70
+    0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x6B,0x94,0x94,0x94,0x93,0x60,0x00,//g 71
+    0x08,0xF8,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//h 72
+    0x00,0x80,0x98,0x98,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//i 73
+    0x00,0x00,0x00,0x80,0x98,0x98,0x00,0x00,0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,//j 74
+    0x08,0xF8,0x00,0x00,0x80,0x80,0x80,0x00,0x20,0x3F,0x24,0x02,0x2D,0x30,0x20,0x00,//k 75
+    0x00,0x08,0x08,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//l 76
+    0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x20,0x3F,0x20,0x00,0x3F,0x20,0x00,0x3F,//m 77
+    0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//n 78
+    0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//o 79
+    0x80,0x80,0x00,0x80,0x80,0x00,0x00,0x00,0x80,0xFF,0xA1,0x20,0x20,0x11,0x0E,0x00,//p 80
+    0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x0E,0x11,0x20,0x20,0xA0,0xFF,0x80,//q 81
+    0x80,0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x20,0x20,0x3F,0x21,0x20,0x00,0x01,0x00,//r 82
+    0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x33,0x24,0x24,0x24,0x24,0x19,0x00,//s 83
+    0x00,0x80,0x80,0xE0,0x80,0x80,0x00,0x00,0x00,0x00,0x00,0x1F,0x20,0x20,0x00,0x00,//t 84
+    0x80,0x80,0x00,0x00,0x00,0x80,0x80,0x00,0x00,0x1F,0x20,0x20,0x20,0x10,0x3F,0x20,//u 85
+    0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x00,0x01,0x0E,0x30,0x08,0x06,0x01,0x00,//v 86
+    0x80,0x80,0x00,0x80,0x00,0x80,0x80,0x80,0x0F,0x30,0x0C,0x03,0x0C,0x30,0x0F,0x00,//w 87
+    0x00,0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x31,0x2E,0x0E,0x31,0x20,0x00,//x 88
+    0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x80,0x81,0x8E,0x70,0x18,0x06,0x01,0x00,//y 89
+    0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x21,0x30,0x2C,0x22,0x21,0x30,0x00,//z 90
+    0x00,0x00,0x00,0x00,0x80,0x7C,0x02,0x02,0x00,0x00,0x00,0x00,0x00,0x3F,0x40,0x40,//{ 91
+    0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,//| 92
+    0x00,0x02,0x02,0x7C,0x80,0x00,0x00,0x00,0x00,0x40,0x40,0x3F,0x00,0x00,0x00,0x00,//} 93
+    0x00,0x06,0x01,0x01,0x02,0x02,0x04,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//~ 94
+};
+
+#endif
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/oled_ssd1306.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/oled_ssd1306.c"
new file mode 100644
index 0000000000000000000000000000000000000000..44da6749df28b499c170185e44d4fb9f428c1b46
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/oled_ssd1306.c"
@@ -0,0 +1,187 @@
+#include <stddef.h>
+#include <stdio.h>
+#include "oled_ssd1306.h"
+#include "wifiiot_gpio.h"
+#include "wifiiot_gpio_ex.h"
+#include "wifiiot_i2c.h"
+#include "wifiiot_errno.h"
+#include "oled_fonts.h"
+
+#define ARRAY_SIZE(a) sizeof(a)/sizeof(a[0])
+
+#define OLED_I2C_IDX WIFI_IOT_I2C_IDX_0
+
+#define OLED_WIDTH    (128)
+#define OLED_I2C_ADDR 0x78 // 默认地址为 0x78
+#define OLED_I2C_CMD 0x00 // 0000 0000       写命令
+#define OLED_I2C_DATA 0x40 // 0100 0000(0x40) 写数据
+#define OLED_I2C_BAUDRATE (400*1000) // 400k
+
+#define DELAY_100_MS (100*1000)
+
+// unsigned int I2cSetBaudrate(WifiIotI2cIdx id, unsigned int baudrate);
+
+static uint32_t I2cWiteByte(uint8_t regAddr, uint8_t byte)
+{
+    WifiIotI2cIdx id = OLED_I2C_IDX;
+    uint8_t buffer[] = {regAddr, byte};
+    WifiIotI2cData i2cData = {0};
+
+    i2cData.sendBuf = buffer;
+    i2cData.sendLen = sizeof(buffer)/sizeof(buffer[0]);
+
+    return I2cWrite(id, OLED_I2C_ADDR, &i2cData);
+}
+
+/**
+ * @brief Write a command byte to OLED device.
+ *
+ * @param cmd the commnad byte to be writen.
+ * @return Returns {@link WIFI_IOT_SUCCESS} if the operation is successful;
+ * returns an error code defined in {@link wifiiot_errno.h} otherwise.
+ */
+static uint32_t WriteCmd(uint8_t cmd)
+{
+    return I2cWiteByte(OLED_I2C_CMD, cmd);
+}
+
+/**
+ * @brief Write a data byte to OLED device.
+ *
+ * @param cmd the data byte to be writen.
+ * @return Returns {@link WIFI_IOT_SUCCESS} if the operation is successful;
+ * returns an error code defined in {@link wifiiot_errno.h} otherwise.
+ */
+static uint32_t WriteData(uint8_t data)
+{
+	return I2cWiteByte(OLED_I2C_DATA, data);
+}
+
+/**
+ * @brief ssd1306 OLED Initialize.
+ */
+uint32_t OledInit(void)
+{
+    static const uint8_t initCmds[] = {
+        0xAE, // --display off
+        0x00, // ---set low column address
+        0x10, // ---set high column address
+        0x40, // --set start line address  
+        0xB0, // --set page address
+        0x81, // contract control
+        0xFF, // --128   
+        0xA1, // set segment remap 
+        0xA6, // --normal / reverse
+        0xA8, // --set multiplex ratio(1 to 64)
+        0x3F, // --1/32 duty
+        0xC8, // Com scan direction
+        0xD3, // -set display offset
+        0x00, // 
+        0xD5, // set osc division
+        0x80, // 
+        0xD8, // set area color mode off
+        0x05, // 
+        0xD9, // Set Pre-Charge Period
+        0xF1, // 
+        0xDA, // set com pin configuartion
+        0x12, // 
+        0xDB, // set Vcomh
+        0x30, // 
+        0x8D, // set charge pump enable
+        0x14, // 
+        0xAF, // --turn on oled panel
+    };
+
+    IoSetFunc(WIFI_IOT_IO_NAME_GPIO_13, WIFI_IOT_IO_FUNC_GPIO_13_I2C0_SDA);
+    IoSetFunc(WIFI_IOT_IO_NAME_GPIO_14, WIFI_IOT_IO_FUNC_GPIO_14_I2C0_SCL);
+
+    I2cInit(WIFI_IOT_I2C_IDX_0, OLED_I2C_BAUDRATE);
+    // I2cSetBaudrate(WIFI_IOT_I2C_IDX_0, OLED_I2C_BAUDRATE);
+
+    for (size_t i = 0; i < ARRAY_SIZE(initCmds); i++) {
+        uint32_t status = WriteCmd(initCmds[i]);
+        if (status != WIFI_IOT_SUCCESS) {
+            return status;
+        }
+    }
+    return WIFI_IOT_SUCCESS;
+}
+
+void OledSetPosition(uint8_t x, uint8_t y)
+{
+    WriteCmd(0xb0 + y);
+    WriteCmd(((x & 0xf0) >> 4) | 0x10);
+    WriteCmd(x & 0x0f);
+}
+
+/*全屏填充*/
+void OledFillScreen(uint8_t fillData)
+{
+    uint8_t m = 0;
+    uint8_t n = 0;
+
+    for (m=0; m < 8; m++) {
+        WriteCmd(0xb0 + m);
+        WriteCmd(0x00);
+        WriteCmd(0x10);
+
+        for (n=0; n < 128; n++) {
+            WriteData(fillData);
+        }
+    }
+}
+
+/**
+ * @brief 8*16 typeface
+ * @param x: write positon start from x axis 
+ * @param y: write positon start from y axis
+ * @param ch: write data
+ * @param font: selected font
+ */
+void OledShowChar(uint8_t x, uint8_t y, uint8_t ch, Font font)
+{      	
+	uint8_t c = 0;
+    uint8_t i = 0;
+
+    c = ch - ' '; //得到偏移后的值	
+    if (x > OLED_WIDTH - 1) {
+        x = 0;
+        y = y + 2;
+    }
+
+    if (font == FONT8x16) {
+        OledSetPosition(x, y);	
+        for (i = 0; i < 8; i++){
+            WriteData(F8X16[c*16 + i]);
+        }
+
+        OledSetPosition(x, y+1);
+        for (i = 0; i < 8; i++) {
+            WriteData(F8X16[c*16 + i + 8]);
+        }
+    } else {
+        OledSetPosition(x, y);
+        for (i = 0; i < 6; i++) {
+            WriteData(F6x8[c][i]);
+        }
+    }
+}
+
+void OledShowString(uint8_t x, uint8_t y, const char* str, Font font)
+{
+	uint8_t j = 0;
+    if (str == NULL) {
+        printf("param is NULL,Please check!!!\r\n");
+        return;
+    }
+
+	while (str[j]) {
+        OledShowChar(x, y, str[j], font);
+		x += 8;
+		if (x > 120) {
+            x = 0;
+            y += 2;
+        }
+		j++;
+	}
+}
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/oled_ssd1306.h" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/oled_ssd1306.h"
new file mode 100644
index 0000000000000000000000000000000000000000..4dfaaf430c9155a82be5dcdec998902ff99f59cd
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_04/oled_ssd1306.h"
@@ -0,0 +1,32 @@
+#ifndef OLED_SSD1306_H
+#define OLED_SSD1306_H
+
+#include <stdint.h>
+
+/**
+ * @brief ssd1306 OLED Initialize.
+ */
+uint32_t OledInit(void);
+
+/**
+ * @brief Set cursor position
+ *
+ * @param x the horizontal posistion of cursor
+ * @param y the vertical position of cursor 
+ * @return Returns {@link WIFI_IOT_SUCCESS} if the operation is successful;
+ * returns an error code defined in {@link wifiiot_errno.h} otherwise.
+ */
+void OledSetPosition(uint8_t x, uint8_t y);
+
+void OledFillScreen(uint8_t fillData);
+
+enum Font {
+    FONT6x8 = 1,
+    FONT8x16
+};
+typedef enum Font Font;
+
+void OledShowChar(uint8_t x, uint8_t y, uint8_t ch, Font font);
+void OledShowString(uint8_t x, uint8_t y, const char* str, Font font);
+
+#endif // OLED_SSD1306_H
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_05/BUILD.gn" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_05/BUILD.gn"
new file mode 100644
index 0000000000000000000000000000000000000000..874087706f48f16b1f8d4c49f6a933f953cab5ab
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_05/BUILD.gn"
@@ -0,0 +1,13 @@
+
+static_library("at_demo") {
+    sources = [
+       "at_demo.c",
+    ]
+
+    include_dirs = [
+        "//utils/native/lite/include",
+        "//kernel/liteos_m/components/cmsis/2.0",
+        "//base/iot_hardware/interfaces/kits/wifiiot_lite",
+        "//vendor\hisi\hi3861\hi3861\components\at\src",
+    ]
+}
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_05/at_demo.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_05/at_demo.c"
new file mode 100644
index 0000000000000000000000000000000000000000..5f046f70f9b6db9e204a416c5edeb5a5bdb366c9
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_05/at_demo.c"
@@ -0,0 +1,23 @@
+#include <stdio.h>
+#include <unistd.h>
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include <at.h>
+#include <hi_at.h>
+hi_u32 at_exe_myproject_cmd(void)
+{
+
+    hi_at_printf("at_exe_myproject_cmd\r\n");
+    return HI_ERR_SUCCESS;
+}
+
+const at_cmd_func g_at_test_func_tbl[] = {
+    {"+MYPROJECT", 10, HI_NULL, HI_NULL, HI_NULL, (at_call_back_func)at_exe_myproject_cmd},
+};
+
+void AtExampleEntry(void)
+{
+    hi_at_register_cmd(g_at_test_func_tbl, sizeof(g_at_test_func_tbl) / sizeof(g_at_test_func_tbl[0]));
+}
+
+SYS_RUN(AtExampleEntry);
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_06/BUILD.gn" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_06/BUILD.gn"
new file mode 100644
index 0000000000000000000000000000000000000000..83dc0d8e207d64b70e63351ec7c4ae593eca44b4
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_06/BUILD.gn"
@@ -0,0 +1,18 @@
+
+static_library("wifi_demo") {
+    sources = [
+        # "wifi_sta_demo.c",
+          "wifi_ap_demo.c",
+    ]
+
+    include_dirs = [
+        "//utils/native/lite/include",
+        "//kernel/liteos_m/components/cmsis/2.0",
+        "//base/iot_hardware/interfaces/kits/wifiiot_lite",
+        "//foundation/communication/interfaces/kits/wifi_lite/wifiservice",
+        # "//third_party/lwip/src/include",
+        "//vendor/hisi/hi3861/hi3861/third_party/lwip_sack/include/",
+    ]
+}
+
+
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_06/wifi_ap_demo.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_06/wifi_ap_demo.c"
new file mode 100644
index 0000000000000000000000000000000000000000..2c516ebcb6b7cdeb0f38d18900a3eec38afd44fd
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_06/wifi_ap_demo.c"
@@ -0,0 +1,86 @@
+
+#include "hi_wifi_api.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netifapi.h"
+#include <stdio.h>
+
+#include <unistd.h>
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+
+#define APP_INIT_VAP_NUM 2
+#define APP_INIT_USR_NUM 2
+
+static struct netif *g_lwip_netif = NULL;
+
+static void WifiAPTask(void *arg)
+{
+    arg = arg;
+    int ret;
+    errno_t rc;
+    char ifname[WIFI_IFNAME_MAX_SIZE + 1] = {0}; //存放ssid
+    int len = sizeof(ifname);
+    hi_wifi_softap_config hapd_conf = {0};
+    ip4_addr_t st_gw;
+    ip4_addr_t st_ipaddr;
+    ip4_addr_t st_netmask;
+
+    rc = memcpy_s(hapd_conf.ssid, HI_WIFI_MAX_SSID_LEN + 1, "Hispark-WiFi-IoT", 16); 
+    if (rc != EOK)
+    {
+        return;
+    }
+
+    //gyz add 2020.11.04 设置密码
+    rc = memcpy_s(hapd_conf.key, HI_WIFI_MAX_KEY_LEN + 1, "12345678", 8); 
+    if (rc != EOK)
+    {
+        return;
+    }
+    // hapd_conf.authmode = HI_WIFI_SECURITY_OPEN;
+    //gyz add 2020.11.04 设置加密模式
+    hapd_conf.authmode = HI_WIFI_SECURITY_WPA2PSK; //
+    hapd_conf.channel_num = 1;
+
+    ret = hi_wifi_softap_start(&hapd_conf, ifname, &len);
+    if (ret != HISI_OK)
+    {
+        printf("hi_wifi_softap_start\n");
+        return;
+    }
+
+    /* acquire netif for IP operation */
+    g_lwip_netif = netifapi_netif_find(ifname);
+    if (g_lwip_netif == NULL)
+    {
+        printf("%s: get netif failed\n", __FUNCTION__);
+        return;
+    }
+
+    IP4_ADDR(&st_gw, 192, 168, 10, 1);       /* input your IP for example: 192.168.1.1 */
+    IP4_ADDR(&st_ipaddr, 192, 168, 10, 1);   /* input your netmask for example: 192.168.1.1 */
+    IP4_ADDR(&st_netmask, 255, 255, 255, 0); /* input your gateway for example: 255.255.255.0 */
+    netifapi_netif_set_addr(g_lwip_netif, &st_ipaddr, &st_netmask, &st_gw);
+
+    netifapi_dhcps_start(g_lwip_netif, 0, 0);
+}
+
+static void WifiApDemo(void)
+{
+    osThreadAttr_t attr;
+
+    attr.name = "WifiAPTask";
+    attr.attr_bits = 0U;
+    attr.cb_mem = NULL;
+    attr.cb_size = 0U;
+    attr.stack_mem = NULL;
+    attr.stack_size = 10240;
+    attr.priority = osPriorityNormal;
+
+    if (osThreadNew(WifiAPTask, NULL, &attr) == NULL)
+    {
+        printf("[WifiAPTask] Falied to create WifiConnectTask!\n");
+    }
+}
+
+APP_FEATURE_INIT(WifiApDemo);
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_06/wifi_sta_demo.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_06/wifi_sta_demo.c"
new file mode 100644
index 0000000000000000000000000000000000000000..c95185e2e773f66987010d2208740571a4e611ce
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_06/wifi_sta_demo.c"
@@ -0,0 +1,73 @@
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include "wifi_device.h"
+#include "lwip/netifapi.h"
+#include "lwip/api_shell.h"
+
+
+
+static void WifiStaTask(void *arg)
+{
+    (void)arg;
+    WifiErrorCode errCode;
+    WifiDeviceConfig apConfig = {};
+    int netId = -1;
+
+    // 设置将要连接的AP属性（wifi名称、密码、加密方式），
+    // strcpy(apConfig.ssid, "TP-LINK_A673");//
+    // strcpy(apConfig.preSharedKey, "aaaaaaaaaa");//密码
+    strcpy(apConfig.ssid, "TP-LINK_D49F");//
+    strcpy(apConfig.preSharedKey, "wyz315ao");//密码
+    apConfig.securityType = WIFI_SEC_TYPE_PSK;//加密类型
+
+    errCode = EnableWifi();//使能wifi功能
+    errCode = AddDeviceConfig(&apConfig, &netId);//生成netId
+    printf("AddDeviceConfig: %d\r\n", errCode);
+
+    errCode = ConnectTo(netId);//连接到与指定的网络ID匹配的热点
+    printf("ConnectTo(%d): %d\r\n", netId, errCode);
+    usleep(3000 * 1000);//等待连接
+    // 联网业务开始
+    // 这里是网络业务代码...
+    struct netif *iface = netifapi_netif_find("wlan0");
+    if (iface)
+    {
+        err_t ret = netifapi_dhcp_start(iface);
+        printf("netifapi_dhcp_start: %d\r\n", ret);
+
+        usleep(2000 * 1000);
+        ; // wait DHCP server give me IP
+        ret = netifapi_netif_common(iface, dhcp_clients_info_show, NULL);
+        printf("netifapi_netif_common: %d\r\n", ret);
+    }
+    usleep(5000*1000);
+    // 联网业务结束
+    Disconnect();        // disconnect with your AP
+    RemoveDevice(netId); // remove AP config
+    errCode = DisableWifi();
+    printf("DisableWifi: %d\r\n", errCode);
+}
+
+static void WifiStaDemo(void)
+{
+    osThreadAttr_t attr;
+
+    attr.name = "WifiStaTask";
+    attr.attr_bits = 0U;
+    attr.cb_mem = NULL;
+    attr.cb_size = 0U;
+    attr.stack_mem = NULL;
+    attr.stack_size = 10240;
+    attr.priority = osPriorityNormal;
+
+    if (osThreadNew(WifiStaTask, NULL, &attr) == NULL)
+    {
+        printf("[WifiConnectDemo] Falied to create WifiConnectTask!\n");
+    }
+}
+
+APP_FEATURE_INIT(WifiStaDemo);
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/BUILD.gn" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/BUILD.gn"
new file mode 100644
index 0000000000000000000000000000000000000000..6ecb18367e9f9f2a5a51ef2daefe59743b4ec90c
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/BUILD.gn"
@@ -0,0 +1,18 @@
+static_library("net_demo") {
+    sources = [
+        "demo.c",
+        "wifi_utils.c",
+        "tcp_server.c",
+        "tcp_client.c",
+        "udp_server.c",
+        "udp_client.c",
+        ]
+
+    include_dirs = [
+        "//utils/native/lite/include",
+        "//kernel/liteos_m/components/cmsis/2.0",
+        "//base/iot_hardware/interfaces/kits/wifiiot_lite",
+        "//vendor/hisi/hi3861/hi3861/third_party/lwip_sack/include",
+        "//foundation/communication/interfaces/kits/wifi_lite/wifiservice",
+    ]
+}
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/demo.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/demo.c"
new file mode 100644
index 0000000000000000000000000000000000000000..9e1e7b86ede9347d1b76ed95e5d203aa3e305dcc
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/demo.c"
@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include "wifi_device.h"
+#include "lwip/netifapi.h"
+#include "lwip/api_shell.h"
+#include "wifi_utils.h"
+#include "tcp_server.h"
+#include "tcp_client.h"
+#include "udp_server.h"
+#include "udp_client.h"
+
+static void NetWorkTask(void *arg){
+    (void)arg;
+    connect_wifi();
+    printf("begin demo\n");
+
+    //  unsigned short port = 5001;
+    //  tcp_server(port);
+
+    // unsigned short port = 5002;
+    // conent_tcp_server("192.168.0.104",port);
+
+    // unsigned short port = 5001;
+    // udp_server(port);
+
+    unsigned short port = 5002;
+    send_to_udp_server("192.168.0.104", port);
+}
+
+static void NetWorkDemo(void)
+{
+    osThreadAttr_t attr;
+
+    attr.name = "NetWorkTask";
+    attr.attr_bits = 0U;
+    attr.cb_mem = NULL;
+    attr.cb_size = 0U;
+    attr.stack_mem = NULL;
+    attr.stack_size = 10240;
+    attr.priority = osPriorityNormal;
+
+    if (osThreadNew(NetWorkTask, NULL, &attr) == NULL)
+    {
+        printf("[NetWorkDemo] Falied to create WifiConnectTask!\n");
+    }
+}
+
+APP_FEATURE_INIT(NetWorkDemo);
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/tcp_client.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/tcp_client.c"
new file mode 100644
index 0000000000000000000000000000000000000000..d22fa265997a406d5fa1d3789965949a03f64793
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/tcp_client.c"
@@ -0,0 +1,53 @@
+#include <stdio.h>
+#include <unistd.h>
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include "hi_wifi_api.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netifapi.h"
+#include "lwip/sockets.h"
+
+static char request[] = "Hello";
+static char response[128] = "";
+
+void conent_tcp_server(const char* host, unsigned short port)
+{
+    ssize_t retval = 0;
+    int sockfd = socket(AF_INET, SOCK_STREAM, 0); // TCP socket
+
+    struct sockaddr_in serverAddr = {0};
+    serverAddr.sin_family = AF_INET;  // AF_INET表示IPv4协议
+    serverAddr.sin_port = htons(port);  // 端口号，从主机字节序转为网络字节序
+    if (inet_pton(AF_INET, host, &serverAddr.sin_addr) <= 0) {  // 将主机IP地址从“点分十进制”字符串 转化为 标准格式（32位整数）
+        printf("inet_pton failed!\r\n");
+        goto do_cleanup;
+    }
+
+    // 尝试和目标主机建立连接，连接成功会返回0 ，失败返回 -1
+    if (connect(sockfd, (struct sockaddr *)&serverAddr, sizeof(serverAddr)) < 0) {
+        printf("connect failed!\r\n");
+        goto do_cleanup;
+    }
+    printf("connect to server %s success!\r\n", host);
+
+    // 建立连接成功之后，这个TCP socket描述符 —— sockfd 就具有了 “连接状态”，发送、接收 对端都是 connect 参数指定的目标主机和端口
+    retval = send(sockfd, request, sizeof(request), 0);
+    if (retval < 0) {
+        printf("send request failed!\r\n");
+        goto do_cleanup;
+    }
+    printf("send request{%s} %ld to server done!\r\n", request, retval);
+
+    retval = recv(sockfd, &response, sizeof(response), 0);
+    if (retval <= 0) {
+        printf("send response from server failed or done, %ld!\r\n", retval);
+        goto do_cleanup;
+    }
+    response[retval] = '\0';
+    printf("recv response{%s} %ld from server done!\r\n", response, retval);
+
+do_cleanup:
+    printf("do_cleanup...\r\n");
+    lwip_close(sockfd);
+}
+
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/tcp_client.h" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/tcp_client.h"
new file mode 100644
index 0000000000000000000000000000000000000000..d23f223b4fddcdc98f7f11643b770230c8000d4b
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/tcp_client.h"
@@ -0,0 +1,4 @@
+#ifndef TCP_CLIENT
+#define TCP_CLIENT
+void conent_tcp_server(const char* host, unsigned short port);
+#endif
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/tcp_server.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/tcp_server.c"
new file mode 100644
index 0000000000000000000000000000000000000000..bc9f22c9950476d0b08df25826e69bc48cc3bf3e
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/tcp_server.c"
@@ -0,0 +1,80 @@
+#include <stdio.h>
+#include <unistd.h>
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include "hi_wifi_api.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netifapi.h"
+#include "lwip/sockets.h"
+
+
+static char request[128] = "";
+void tcp_server(unsigned short port)
+{
+    ssize_t retval = 0;
+    int backlog = 1;
+    int sockfd = socket(AF_INET, SOCK_STREAM, 0); // TCP socket
+    int connfd = -1;
+
+    struct sockaddr_in clientAddr = {0};
+    socklen_t clientAddrLen = sizeof(clientAddr);
+    struct sockaddr_in serverAddr = {0};
+    serverAddr.sin_family = AF_INET;
+    serverAddr.sin_port = htons(port);              // 端口号，从主机字节序转为网络字节序
+    serverAddr.sin_addr.s_addr = htonl(INADDR_ANY); // 允许任意主机接入， 0.0.0.0
+
+    retval = bind(sockfd, (struct sockaddr *)&serverAddr, sizeof(serverAddr)); // 绑定端口
+    if (retval < 0)
+    {
+        printf("bind failed, %ld!\r\n", retval);
+        goto do_cleanup;
+    }
+    printf("bind to port %d success!\r\n", port);
+
+    retval = listen(sockfd, backlog); // 开始监听
+    if (retval < 0)
+    {
+        printf("listen failed!\r\n");
+        goto do_cleanup;
+    }
+    printf("listen with %d backlog success!\r\n", backlog);
+
+    // 接受客户端连接，成功会返回一个表示连接的 socket ， clientAddr 参数将会携带客户端主机和端口信息 ；失败返回 -1
+    // 此后的 收、发 都在 表示连接的 socket 上进行；之后 sockfd 依然可以继续接受其他客户端的连接，
+    //  UNIX系统上经典的并发模型是“每个连接一个进程”——创建子进程处理连接，父进程继续接受其他客户端的连接
+    //  鸿蒙liteos-a内核之上，可以使用UNIX的“每个连接一个进程”的并发模型
+    //     liteos-m内核之上，可以使用“每个连接一个线程”的并发模型
+    connfd = accept(sockfd, (struct sockaddr *)&clientAddr, &clientAddrLen);
+    if (connfd < 0)
+    {
+        printf("accept failed, %d, %d\r\n", connfd, errno);
+        goto do_cleanup;
+    }
+    printf("accept success, connfd = %d!\r\n", connfd);
+    printf("client addr info: host = %s, port = %d\r\n", inet_ntoa(clientAddr.sin_addr), ntohs(clientAddr.sin_port));
+
+    // 后续 收、发 都在 表示连接的 socket 上进行；
+    retval = recv(connfd, request, sizeof(request), 0);
+    if (retval < 0)
+    {
+        printf("recv request failed, %ld!\r\n", retval);
+        goto do_disconnect;
+    }
+    printf("recv request{%s} from client done!\r\n", request);
+
+    retval = send(connfd, request, strlen(request), 0);
+    if (retval <= 0)
+    {
+        printf("send response failed, %ld!\r\n", retval);
+        goto do_disconnect;
+    }
+    printf("send response{%s} to client done!\r\n", request);
+
+do_disconnect:
+    lwip_close(connfd);
+
+do_cleanup:
+    printf("do_cleanup...\r\n");
+
+    lwip_close(sockfd);
+}
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/tcp_server.h" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/tcp_server.h"
new file mode 100644
index 0000000000000000000000000000000000000000..70df2760fc0676923935dcd3f81f4991fd362167
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/tcp_server.h"
@@ -0,0 +1,4 @@
+#ifndef TCP_SERVER
+#define TCP_SERVER
+void tcp_server(unsigned short port);
+#endif
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/udp_client.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/udp_client.c"
new file mode 100644
index 0000000000000000000000000000000000000000..4bddae4a32d1ad90a18833fdc57d7f07e1ea7f12
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/udp_client.c"
@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <unistd.h>
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include "hi_wifi_api.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netifapi.h"
+#include "lwip/sockets.h"
+
+static char request[] = "Hello. I am from chinasoft";
+static char response[128] = "";
+
+void send_to_udp_server(const char* host, unsigned short port)
+{
+    ssize_t retval = 0;
+    int sockfd = socket(AF_INET, SOCK_DGRAM, 0); // UDP socket
+
+    struct sockaddr_in toAddr = {0};
+    toAddr.sin_family = AF_INET;
+    toAddr.sin_port = htons(port); // 端口号，从主机字节序转为网络字节序
+    if (inet_pton(AF_INET, host, &toAddr.sin_addr) <= 0) { // 将主机IP地址从“点分十进制”字符串 转化为 标准格式（32位整数）
+        printf("inet_pton failed!\r\n");
+        goto do_cleanup;
+    }
+
+    // UDP socket 是 “无连接的” ，因此每次发送都必须先指定目标主机和端口，主机可以是多播地址
+    retval = sendto(sockfd, request, sizeof(request), 0, (struct sockaddr *)&toAddr, sizeof(toAddr));
+    if (retval < 0) {
+        printf("sendto failed!\r\n");
+        goto do_cleanup;
+    }
+    printf("send UDP message {%s} %ld done!\r\n", request, retval);
+
+    struct sockaddr_in fromAddr = {0};
+    socklen_t fromLen = sizeof(fromAddr);
+
+    // UDP socket 是 “无连接的” ，因此每次接收时前并不知道消息来自何处，通过 fromAddr 参数可以得到发送方的信息（主机、端口号）
+    retval = recvfrom(sockfd, &response, sizeof(response), 0, (struct sockaddr *)&fromAddr, &fromLen);
+    if (retval <= 0) {
+        printf("recvfrom failed or abort, %ld, %d!\r\n", retval, errno);
+        goto do_cleanup;
+    }
+    response[retval] = '\0';
+    printf("recv UDP message {%s} %ld done!\r\n", response, retval);
+    printf("peer info: ipaddr = %s, port = %d\r\n", inet_ntoa(fromAddr.sin_addr), ntohs(fromAddr.sin_port));
+
+do_cleanup:
+    printf("do_cleanup...\r\n");
+    lwip_close(sockfd);
+}
+
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/udp_client.h" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/udp_client.h"
new file mode 100644
index 0000000000000000000000000000000000000000..39f07312845a4e2845c1216a8c56ac8139699582
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/udp_client.h"
@@ -0,0 +1,4 @@
+#ifndef UDP_CLIENT
+#define UDP_CLIENT
+void send_to_udp_server(const char* host, unsigned short port);
+#endif
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/udp_server.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/udp_server.c"
new file mode 100644
index 0000000000000000000000000000000000000000..cfa7441b4437a3504366e63f9d17cfee3c2dc261
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/udp_server.c"
@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <unistd.h>
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include "hi_wifi_api.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netifapi.h"
+#include "lwip/sockets.h"
+
+static char message[128] = "";
+void udp_server(unsigned short port)
+{
+    ssize_t retval = 0;
+    int sockfd = socket(AF_INET, SOCK_DGRAM, 0); // UDP socket
+
+    struct sockaddr_in clientAddr = {0};
+    socklen_t clientAddrLen = sizeof(clientAddr);
+    struct sockaddr_in serverAddr = {0};
+    serverAddr.sin_family = AF_INET;
+    serverAddr.sin_port = htons(port);
+    serverAddr.sin_addr.s_addr = htonl(INADDR_ANY);
+
+    retval = bind(sockfd, (struct sockaddr *)&serverAddr, sizeof(serverAddr));
+    if (retval < 0) {
+        printf("bind failed, %ld!\r\n", retval);
+        goto do_cleanup;
+    }
+    printf("bind to port %d success!\r\n", port);
+
+    retval = recvfrom(sockfd, message, sizeof(message), 0, (struct sockaddr *)&clientAddr, &clientAddrLen);
+    if (retval < 0) {
+        printf("recvfrom failed, %ld!\r\n", retval);
+        goto do_cleanup;
+    }
+    printf("recv message {%s} %ld done!\r\n", message, retval);
+    printf("peer info: ipaddr = %s, port = %d\r\n", inet_ntoa(clientAddr.sin_addr), ntohs(clientAddr.sin_port));
+
+    retval = sendto(sockfd, message, strlen(message), 0, (struct sockaddr *)&clientAddr, sizeof(clientAddr));
+    if (retval <= 0) {
+        printf("send failed, %ld!\r\n", retval);
+        goto do_cleanup;
+    }
+    printf("send message {%s} %ld done!\r\n", message, retval);
+
+do_cleanup:
+    printf("do_cleanup...\r\n");
+
+    lwip_close(sockfd);
+}
+
+
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/udp_server.h" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/udp_server.h"
new file mode 100644
index 0000000000000000000000000000000000000000..3bc50c6b9748b9d45650cfe0734e4e966bd197aa
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/udp_server.h"
@@ -0,0 +1,4 @@
+#ifndef UDP_SERVER
+#define UDP_SERVER
+void udp_server(unsigned short port);
+#endif
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/wifi_utils.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/wifi_utils.c"
new file mode 100644
index 0000000000000000000000000000000000000000..b0920a4e915916fbf6ede46dde141dd279875685
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/wifi_utils.c"
@@ -0,0 +1,46 @@
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include "wifi_device.h"
+#include "lwip/netifapi.h"
+#include "lwip/api_shell.h"
+
+
+
+ void connect_wifi(void)
+{
+   
+    WifiErrorCode errCode;
+    WifiDeviceConfig apConfig = {};
+    int netId = -1;
+
+    // setup your AP params
+    strcpy(apConfig.ssid, "TP-LINK_D49F");//
+    strcpy(apConfig.preSharedKey, "wyz315ao");//密码
+    apConfig.securityType = WIFI_SEC_TYPE_PSK;
+
+    errCode = EnableWifi();
+    errCode = AddDeviceConfig(&apConfig, &netId);
+
+    errCode = ConnectTo(netId);
+    printf("ConnectTo(%d): %d\r\n", netId, errCode);
+    usleep(1000 * 1000);
+    // 联网业务开始
+    // 这里是网络业务代码...
+    struct netif *iface = netifapi_netif_find("wlan0");
+    if (iface)
+    {
+        err_t ret = netifapi_dhcp_start(iface);
+        printf("netifapi_dhcp_start: %d\r\n", ret);
+
+        usleep(2000 * 1000);
+        ; // wait DHCP server give me IP
+        ret = netifapi_netif_common(iface, dhcp_clients_info_show, NULL);
+        printf("netifapi_netif_common: %d\r\n", ret);
+    }
+  
+}
+
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/wifi_utils.h" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/wifi_utils.h"
new file mode 100644
index 0000000000000000000000000000000000000000..dc016576a777adbb009a7f834dae56ecda7ff2e8
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_07/wifi_utils.h"
@@ -0,0 +1,5 @@
+
+#ifndef WIFI_UTILS
+#define WIFI_UTILS
+void connect_wifi(void);
+#endif
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/BUILD.gn" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/BUILD.gn"
new file mode 100644
index 0000000000000000000000000000000000000000..73534d299ec976c9f0ba842e8d30b9d5a78ed780
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/BUILD.gn"
@@ -0,0 +1,18 @@
+static_library("mqtt_demo") {
+    sources = [
+        "wifi_utils.c","demo.c","mqtt_test.c",
+
+        ]
+
+    include_dirs = [
+
+        "//utils/native/lite/include",
+        "//kernel/liteos_m/components/cmsis/2.0",
+        "//base/iot_hardware/interfaces/kits/wifiiot_lite",
+        "//vendor/hisi/hi3861/hi3861/third_party/lwip_sack/include",
+        "//foundation/communication/interfaces/kits/wifi_lite/wifiservice",
+        "//third_party/pahomqtt/MQTTPacket/src",
+        "//third_party/pahomqtt/MQTTPacket/samples",
+        "//vendor\hisi\hi3861\hi3861\components\at\src"
+    ]
+}
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/demo.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/demo.c"
new file mode 100644
index 0000000000000000000000000000000000000000..c6dbe875d3dd7f5026185eeb25231a2313ddcc29
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/demo.c"
@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include "wifi_device.h"
+#include "lwip/netifapi.h"
+#include "lwip/api_shell.h"
+#include "wifi_utils.h"
+#include "mqtt_test.h"
+#include <at.h>
+#include <hi_at.h>
+
+static void mqtt_test_thread(void *arg)
+{
+    (void)arg;
+    connect_wifi();//连接AP，
+    printf("begin mqtt  demo\n");
+
+    mqtt_test();//运行mqtt测试程序
+}
+
+//AT指令回调函数，在函数中创建新线程
+hi_u32 at_exe_mqtt_test_cmd(void)
+{
+    osThreadAttr_t attr;
+
+    attr.name = "wifi_config_thread";
+    attr.attr_bits = 0U;
+    attr.cb_mem = NULL;
+    attr.cb_size = 0U;
+    attr.stack_mem = NULL;
+    attr.stack_size = 4096;
+    attr.priority = 36;
+    //在新线程中执行函数mqtt_test_thread
+    if (osThreadNew((osThreadFunc_t)mqtt_test_thread, NULL, &attr) == NULL)
+    {
+        printf("[LedExample] Falied to create LedTask!\n");
+    }
+
+    AT_RESPONSE_OK;
+    return HI_ERR_SUCCESS;
+}
+
+const at_cmd_func g_at_mqtt_func_tbl[] = {
+    {"+MQTTTEST", 9, HI_NULL, HI_NULL, HI_NULL, (at_call_back_func)at_exe_mqtt_test_cmd},
+};
+
+//注册AT指令
+void AtMqttTestEntry(void)
+{
+    hi_at_register_cmd(g_at_mqtt_func_tbl, sizeof(g_at_mqtt_func_tbl) / sizeof(g_at_mqtt_func_tbl[0]));
+}
+SYS_RUN(AtMqttTestEntry);
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/mqtt_test.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/mqtt_test.c"
new file mode 100644
index 0000000000000000000000000000000000000000..9c52bcbc5395f7b522e6c71d9b3aaf23d2a8603e
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/mqtt_test.c"
@@ -0,0 +1,134 @@
+#include <stdio.h>
+
+#include <unistd.h>
+
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+
+#include <unistd.h>
+#include "hi_wifi_api.h"
+//#include "wifi_sta.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netifapi.h"
+
+#include "lwip/sockets.h"
+
+#include "MQTTPacket.h"
+#include "transport.h"
+
+int toStop = 0;
+
+int mqtt_connect(void)
+{
+	MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
+	int rc = 0;
+	int mysock = 0;
+	unsigned char buf[200];
+	int buflen = sizeof(buf);
+	int msgid = 1;
+	MQTTString topicString = MQTTString_initializer;
+	int req_qos = 0;
+	char* payload = "hello HarmonyOS";
+	int payloadlen = strlen(payload);
+	int len = 0;
+
+    char *host = "121.36.35.193"; //mqtt服务器ip地址
+	int port = 1883;////mqtt服务器端口
+
+
+	mysock = transport_open(host, port);
+	if(mysock < 0)
+		return mysock;
+
+	printf("Sending to hostname %s port %d\n", host, port);
+
+	data.clientID.cstring = "hi3861"; //设置客户端ID
+	data.keepAliveInterval = 20; //设置心跳间隔
+	data.cleansession = 1;
+	data.username.cstring = "hi3861";     //用户名
+	data.password.cstring = "testpassword";  //密码
+
+	len = MQTTSerialize_connect(buf, buflen, &data);//开始连接
+	rc = transport_sendPacketBuffer(mysock, buf, len);//发送缓冲区
+
+	/* wait for connack   */
+	if (MQTTPacket_read(buf, buflen, transport_getdata) == CONNACK)//等待连接返回
+	{
+		unsigned char sessionPresent, connack_rc;
+
+		if (MQTTDeserialize_connack(&sessionPresent, &connack_rc, buf, buflen) != 1 || connack_rc != 0)
+		{
+			printf("Unable to connect, return code %d\n", connack_rc);
+			goto exit;
+		}
+	}
+	else
+		goto exit;
+
+	/* subscribe */
+	topicString.cstring = "subtopic"; //设置订阅主题
+	// topicString.cstring = "substopic";
+	len = MQTTSerialize_subscribe(buf, buflen, 0, msgid, 1, &topicString, &req_qos);
+	rc = transport_sendPacketBuffer(mysock, buf, len);
+	if (MQTTPacket_read(buf, buflen, transport_getdata) == SUBACK) 	/* wait for suback */
+	{
+		unsigned short submsgid;
+		int subcount;
+		int granted_qos;
+
+		rc = MQTTDeserialize_suback(&submsgid, 1, &subcount, &granted_qos, buf, buflen);
+		if (granted_qos != 0)
+		{
+			printf("granted qos != 0, %d\n", granted_qos);
+			goto exit;
+		}
+	}
+	else
+		goto exit;
+
+	/* loop getting msgs on subscribed topic */
+	
+	while (!toStop)
+	{
+		/* transport_getdata() has a built-in 1 second timeout,
+		your mileage will vary */
+		if (MQTTPacket_read(buf, buflen, transport_getdata) == PUBLISH)
+		{
+			unsigned char dup;
+			int qos;
+			unsigned char retained;
+			unsigned short msgid;
+			int payloadlen_in;
+			unsigned char* payload_in;
+			int rc;
+			MQTTString receivedTopic;
+			rc = MQTTDeserialize_publish(&dup, &qos, &retained, &msgid, &receivedTopic,
+					&payload_in, &payloadlen_in, buf, buflen);
+			printf("message arrived %.*s\n", payloadlen_in, payload_in);
+
+            rc = rc;
+        }
+
+		topicString.cstring = "pubtopic"; //发布主题
+		// printf("publishing reading\n");
+		//发布接收到的消息
+		len = MQTTSerialize_publish(buf, buflen, 0, 0, 0, 0, topicString, (unsigned char*)payload, payloadlen);
+        rc = transport_sendPacketBuffer(mysock, buf, len);
+	}
+
+	printf("disconnecting\n");
+	len = MQTTSerialize_disconnect(buf, buflen);
+	rc = transport_sendPacketBuffer(mysock, buf, len);
+exit:
+	transport_close(mysock);
+
+    rc = rc;
+
+	return 0;
+}
+
+
+void mqtt_test(void)
+{
+    mqtt_connect();
+}
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/mqtt_test.h" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/mqtt_test.h"
new file mode 100644
index 0000000000000000000000000000000000000000..57f01fe6faa70e11bed46b07b378e4c10e51e441
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/mqtt_test.h"
@@ -0,0 +1,6 @@
+#ifndef __MQTT_TEST_H__
+#define __MQTT_TEST_H__
+
+void mqtt_test(void);//mqtt测试函数
+
+#endif /* __MQTT_TEST_H__ */
\ No newline at end of file
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/wifi_utils.c" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/wifi_utils.c"
new file mode 100644
index 0000000000000000000000000000000000000000..b0920a4e915916fbf6ede46dde141dd279875685
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/wifi_utils.c"
@@ -0,0 +1,46 @@
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include "wifi_device.h"
+#include "lwip/netifapi.h"
+#include "lwip/api_shell.h"
+
+
+
+ void connect_wifi(void)
+{
+   
+    WifiErrorCode errCode;
+    WifiDeviceConfig apConfig = {};
+    int netId = -1;
+
+    // setup your AP params
+    strcpy(apConfig.ssid, "TP-LINK_D49F");//
+    strcpy(apConfig.preSharedKey, "wyz315ao");//密码
+    apConfig.securityType = WIFI_SEC_TYPE_PSK;
+
+    errCode = EnableWifi();
+    errCode = AddDeviceConfig(&apConfig, &netId);
+
+    errCode = ConnectTo(netId);
+    printf("ConnectTo(%d): %d\r\n", netId, errCode);
+    usleep(1000 * 1000);
+    // 联网业务开始
+    // 这里是网络业务代码...
+    struct netif *iface = netifapi_netif_find("wlan0");
+    if (iface)
+    {
+        err_t ret = netifapi_dhcp_start(iface);
+        printf("netifapi_dhcp_start: %d\r\n", ret);
+
+        usleep(2000 * 1000);
+        ; // wait DHCP server give me IP
+        ret = netifapi_netif_common(iface, dhcp_clients_info_show, NULL);
+        printf("netifapi_netif_common: %d\r\n", ret);
+    }
+  
+}
+
diff --git "a/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/wifi_utils.h" "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/wifi_utils.h"
new file mode 100644
index 0000000000000000000000000000000000000000..7b6e5c298083b84ea1b5cd3b8037a1db56716c98
--- /dev/null
+++ "b/OpenHarmony\347\241\254\344\273\266\345\274\200\345\217\221\345\237\272\347\241\200/02.\346\225\231\345\255\246\346\241\210\344\276\213\346\272\220\344\273\243\347\240\201/chapter_08/wifi_utils.h"
@@ -0,0 +1,5 @@
+
+#ifndef WIFI_UTILS
+#define WIFI_UTILS
+void connect_wifi(void);//连接wifi
+#endif
\ No newline at end of file