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不稳定的Arduino Web服务器

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我一直在尝试使用Arduino设置Web服务器 . 我有一台UNO和一台HanRun HR91105A我上网了,我正在使用WebServer示例的修改版来测试我的代码 . 事实上它确实起作用了 . 但是在设置端口转发后,连接突然变得不稳定 . 它连接并工作几分钟,然后突然我甚至无法ping它 . 尝试ping Arduino会导致请求超时 . 在线研究表明有两种可能:

1.)所有RAM都用完了
2.)以太网屏蔽有故障

以下是我的代码

#include <SPI.h>
#include <Ethernet.h>

// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {
  0x44, 0x00, 0x10, 0x20, 0x8C, 0x0A
};
IPAddress ip(192,168,1,90);

// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(8081);

void setup() {
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }


  // start the Ethernet connection and the server:
  Ethernet.begin(mac, ip);
  server.begin();
  Serial.print("server is at ");
  Serial.println(Ethernet.localIP());
}


void loop() {
    // listen for incoming clients
    EthernetClient client = server.available();
    if (client) {
      Serial.println("new client");
      // an http request ends with a blank line
      boolean currentLineIsBlank = true;
      while (client.connected()) {
        if (client.available()) {
          char c = client.read();
          Serial.write(c);
          // if you've gotten to the end of the line (received a newline
          // character) and the line is blank, the http request has ended,
          // so you can send a reply
          if (c == '\n' && currentLineIsBlank) {
            // send a standard http response header
            client.println("HTTP/1.1 200 OK");
            client.println("Content-Type: text/html");
            client.println("Connection: close");  
            client.println("Refresh: 2");
            client.println();
            client.println("<!DOCTYPE HTML>");
//-----------------Type in outputs below-------------------------------------
            client.println("<html>");
            client.print("Hello World!");
            client.print("<p id='Header'>");
            client.print("Sensor Data");
            client.println("</p>");
            client.print("<p id='Pressure'>");
            client.print("Pressure:");
            client.println("</p>");
            client.print("<p id='Acceleration'>");
            client.print("Acceleration:");
            client.println("</p>");
            client.println("<br /)");
            client.println("</html>");
            break;
//-----------------End of outputs--------------------------------------------
              }

            if (c == '\n') {
              // you're starting a new line
              currentLineIsBlank = true;
            } else if (c != '\r') {
              // you've gotten a character on the current line
              currentLineIsBlank = false;
            }
          }
        }
        // give the web browser time to receive the data
        delay(1);
        // close the connection:
        client.stop();
        Serial.println("client disconnected");
      }
    }

另外,arduino确实有一个静态IP,所以我很确定它不是DHCP租约到期的问题 .

我非常怀疑屏蔽是否有故障,因为它在运行时变得非常热 . 另外它是一个仿冒品 . 但我不能忽视我编码效率低下的可能性,因为我不是很有经验 . 任何帮助,将不胜感激 . 谢谢 .

1 回答

  • -2

    当RAM不够时,你的Arduino将无法预测地运行 . 在这段代码中,有许多常量字符串 . 你应该将这些字符串存储在FLASH存储器中以节省RAM . 为了这样,使用F()宏 . 例如 . client.println(F("HTTP/1.1 200 OK"));

    如果您的程序很大,我建议使用配备嵌入式Web服务器的屏蔽(例如PHPoC Shield)

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