Question

我只是试着让TXT文件包含使用以下代码抛出Arduino以太网屏蔽
原始代码http://arduino.cc/en/Tutorial/WebClientRepeating

/*
  Repeating Web client

 This sketch connects to a a web server and makes a request
 using a Wiznet Ethernet shield. You can use the Arduino Ethernet shield, or
 the Adafruit Ethernet shield, either one will work, as long as it's got
 a Wiznet Ethernet module on board.

 This example uses DNS, by assigning the Ethernet client with a MAC address,
 IP address, and DNS address.

 Circuit:
 * Ethernet shield attached to pins 10, 11, 12, 13

 created 19 Apr 2012
 by Tom Igoe

 http://arduino.cc/en/Tutorial/WebClientRepeating
 This code is in the public domain.

 */

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

// assign a MAC address for the ethernet controller.
// fill in your address here:
byte mac[] = { 
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
// fill in an available IP address on your network here,
// for manual configuration:
IPAddress ip(192,168,1,177);

// fill in your Domain Name Server address here:
IPAddress myDns(192,168,1,1);

// initialize the library instance:
EthernetClient client;

char server[] = "192.168.1.100";

unsigned long lastConnectionTime = 0;          // last time you connected to the server, in milliseconds
boolean lastConnected = false;                 // state of the connection last time through the main loop
const unsigned int postingInterval = 60*1000;  // delay between updates, in milliseconds

void setup() {
  // start serial port:
  Serial.begin(9600);
  // give the ethernet module time to boot up:
  delay(1000);
  // start the Ethernet connection using a fixed IP address and DNS server:
  Ethernet.begin(mac, ip, myDns);
  // print the Ethernet board/shield's IP address:
  Serial.print("My IP address: ");
  Serial.println(Ethernet.localIP());
}

void loop() {
  // if there's incoming data from the net connection.
  // send it out the serial port.  This is for debugging
  // purposes only:
  if (client.available()) {
    char c = client.read();
    Serial.print(c);
  }

  // if there's no net connection, but there was one last time
  // through the loop, then stop the client:
  if (!client.connected() && lastConnected) {
    Serial.println();
    Serial.println("disconnecting.");
    client.stop();
  }

  // if you're not connected, and ten seconds have passed since
  // your last connection, then connect again and send data:
  if(!client.connected() && (millis() - lastConnectionTime > postingInterval)) {
    httpRequest();
  }
  // store the state of the connection for next time through
  // the loop:
  lastConnected = client.connected();
}

// this method makes a HTTP connection to the server:
void httpRequest() {
  // if there's a successful connection:
  if (client.connect(server, 80)) {
    Serial.println("connecting...");
    // send the HTTP PUT request:
    client.println("GET /latest.txt HTTP/1.1");
    client.println("Host: 192.168.1.100");
    client.println("User-Agent: arduino-ethernet");
    client.println("Connection: close");
    client.println();

    // note the time that the connection was made:
    lastConnectionTime = millis();
  } 
  else {
    // if you couldn't make a connection:
    Serial.println("connection failed");
    Serial.println("disconnecting.");
    client.stop();
  }
}

我在串行监视器上的所有结果

My IP address: 192.168.1.177
connecting...
HTTP/1.1 200 OK
Date: Tue, 16 Sep 2014 14:17:12 GMT
Server: Apache/2.4.9 (Win64) PHP/5.5.12
Last-Modified: Tue, 16 Sep 2014 12:42:19 GMT
ETag: "6-5032e150962be"
Accept-Ranges: bytes
Content-Length: 6
Connection: close
Content-Type: text/plain

123321
disconnecting.

我想使用这样的数据if(strcmp(test,"123321")==0) Serial.println( "OK"); 但是当它有http标题我不能，所以我想只得到文本

Answer 1

将client.println("GET /latest.txt HTTP/1.1");更改为client.println("GET /latest.txt");

Answer 2

我的代码完全相似。您需要先将字符串保存在字符串中。所以你的read语句在哪里，你需要一个字符串追加运算符并将“if”更改为“while”，类似

while(client.available()) 
    {
        c = client.read();
        response = response + c; 
    }

确保在void loop（）外面声明字符串“response”。这将在“响应”中保存服务器的整个响应。之后，您可以应用子字符串函数从“响应”中提取所需的文本。访问Arduino的官方网页，了解“substring”的详细信息。就我而言，它就像是：

r = (response.substring(165,174));

要找到标题结束和原始响应开始的位置，将会有点痛苦，我建议使用试错法。继续尝试任意字符串索引。每次打印“r”，看看你有多接近。或者你可以计算字符，包括空格和从HTTP 1.1到123321开头的“\ n”。因此变量“r”将携带您提供给字符串“response”的response.substring（，）的文本b / w索引位置。之后你可以使用“r”来表达你喜欢的目的。

看看我的代码。我希望它有所帮助。 String Comparsion: Arduino C

Arduino和php之间的联系

2 个答案: