RT-Thread-使用 rt-thread studio 创建 esp32 web 服务器RT-Thread问答社区

使用 rt-thread studio 创建 esp32 web 服务器

发布于 2021-01-19 11:39:30 浏览：4395 订阅该版

[tocm]

## 实验环境：

+ Windows 10

+ [Rt-thread studio 2.0.0](https://www.rt-thread.io/studio.html)

+ ESP32-Ethernet-Kit_A_V1.1

![esp32-ethernet-kit-v1.1.png](https://oss-club.rt-thread.org/uploads/20210119/3bc67e5bc44e069fe7f7bc8832e92c95.png)

实验步骤：

ESP32-Ethernet-Kit_A_V1.1 评估板板载 ESP32-WROVER-B 模组，因此我们选择ESP32-WROVER 创建基于 PlatformIO 的 arduino 框架的工程

这里我们使用 RT-Thread Studio 作为 IDE，这款 IDE 可以方便的创建 PlatformIO  
工程

1. 创建工程

![create_project.png](https://oss-club.rt-thread.org/uploads/20210119/03a8aded59a173d664eda5f7fe07333f.png)

2. 参考 esp 官方例程，将下面的程序拷贝到main.cpp 文件中

```cpp
   #include <WiFi.h>
   #include <WiFiClient.h>
   #include <WebServer.h>
   #include <ESPmDNS.h>
   
   const char* ssid = "your_wifi_ssid";
   const char* password = "your_wifi_passwd";
   
   WebServer server(80);
   
   const int led = 13;
   
   void handleRoot()
   {
       digitalWrite(led, 1);
       server.send(200, "text/plain", "hello from esp8266!");
       digitalWrite(led, 0);
   }
   
   void handleNotFound()
   {
       digitalWrite(led, 1);
       String message = "File Not Found\n\n";
       message += "URI: ";
       message += server.uri();
       message += "\nMethod: ";
       message += (server.method() == HTTP_GET) ? "GET" : "POST";
       message += "\nArguments: ";
       message += server.args();
       message += "\n";
       for (uint8_t i = 0; i < server.args(); i++)
       {
           message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
       }
       server.send(404, "text/plain", message);
       digitalWrite(led, 0);
   }
   
   void setup(void)
   {
       pinMode(led, OUTPUT);
       digitalWrite(led, 0);
       Serial.begin(115200);
       WiFi.mode(WIFI_STA);
       WiFi.begin(ssid, password);
       Serial.println("");
   
       // Wait for connection
       while (WiFi.status() != WL_CONNECTED)
       {
           delay(500);
           Serial.print(".");
       }
       Serial.println("");
       Serial.print("Connected to ");
       Serial.println(ssid);
       Serial.print("IP address: ");
       Serial.println(WiFi.localIP());
   
       if (MDNS.begin("esp32"))
       {
           Serial.println("MDNS responder started");
       }
   
       server.on("/", handleRoot);
   
       server.on("/inline", []()
       {
           server.send(200, "text/plain", "this works as well");
       });
   
       server.onNotFound(handleNotFound);
   
       server.begin();
       Serial.println("HTTP server started");
   }
   
   void loop(void)
   {
       server.handleClient();
   }
   
   ```

在这段代码中，启动了一个web server 并监听80 端口，并对接收的 http 请求做以下路由处理：

+ 收到 “ip:80/”的请求，由handleRoot 函数处理，返回http 状态码200，和平文本字符串"hello from esp8266!"

```cpp
     void handleRoot()
     {
         digitalWrite(led, 1);
         server.send(200, "text/plain", "hello from esp8266!");
         digitalWrite(led, 0);
     }
     ```

+ 收到"ip:80/inline"的请求，返回200状态码和平文本"this works as well"

```cpp
     server.on("/inline", []()
               {
                   server.send(200, "text/plain", "this works as well");
               });
     ```

+ 收到其他资源请求，由handleNotFound 处理，返回404

```cpp
     void handleNotFound()
     {
         digitalWrite(led, 1);
         String message = "File Not Found\n\n";
         message += "URI: ";
         message += server.uri();
         message += "\nMethod: ";
         message += (server.method() == HTTP_GET) ? "GET" : "POST";
         message += "\nArguments: ";
         message += server.args();
         message += "\n";
         for (uint8_t i = 0; i < server.args(); i++)
         {
             message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
         }
         server.send(404, "text/plain", message);
         digitalWrite(led, 0);
     }
     ```

3. 修改wifi 账号和密码为你的环境热点的 wifi 配置，这样模块才能够连接上热点

```cpp
   const char* ssid = "your_wifi_ssid";
   const char* password = "your_wifi_passwd";
   ```

4. 点击IDE 左上角的 小锤子图标，编译整个工程

![esp_compile.png](https://oss-club.rt-thread.org/uploads/20210119/b8249a1cef3db6204139fe8eeaa2d65b.png)

5. 连接micro-usb 连接线，点击下载按钮，下载程序到评估板

![esp32_download.png](https://oss-club.rt-thread.org/uploads/20210119/11e5d21fd43acc31ee8b7af58d852bcc.png)

6. 下载完成后 ，连接串口终端，可以看到模块已经成功启动，信息如下

![esp32_ip.png](https://oss-club.rt-thread.org/uploads/20210119/2e448e531b042480b0b28f826f613d92.png)

7. 打开 chrome，分别访问 http://172.30.200.121/  ,  http://172.30.200.121/inline , http://172.30.200.121/xxx  可以获取esp web 服务器对不同资源的响应

+ http://172.30.200.121/

![index.png](https://oss-club.rt-thread.org/uploads/20210119/c1c34f499cc25680290191c6d0985f8a.png)

+ http://172.30.200.121/inline