Question

我正在尝试使用NodeMCU示例客户端代码向我的网站发送标准的http GET请求，但由于某种原因它无法正常工作。

如果我输入我的浏览器：snackrefill.com/GetData.php?username=aaaa&pin=bbbb&cost=cccc那么它将成功连接php脚本并保存数据库条目。

问题在于，当我尝试使用NodeMCU模块执行相同操作时，它不起作用。它似乎连接到WiFi和服务器就好了但是当它发送请求时似乎没有发生任何事情。

我是否错误地构建了我的请求？

#include <ESP8266WiFi.h>

const char* ssid     = "BELL473";
const char* password = "XXXXXXX";

const char* host = "ns8451.hostgator.com";

void setup() {
  Serial.begin(115200);
  delay(10);

  // We start by connecting to a WiFi network

  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password); //works!

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");  
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

int value = 0;

void loop() {
  delay(5000);
  ++value;

  Serial.print("connecting to ");
  Serial.println(host);

  // Use WiFiClient class to create TCP connections
  WiFiClient client;
  const int httpPort = 80;
  if (!client.connect(host, httpPort)) { //works!
    Serial.println("connection failed");
    return;
  }

  // We now create a URI for the request
  String url = "/GetData.php";
  url += "?username=";
  url += "aaaa";
  url += "&pin=";
  url += "bbbb";
  url += "&cost=";
  url += "cccc";

  Serial.print("Requesting URL: ");
  Serial.println(url);

  // This will send the request to the server
  client.print(String("GET ") + url + " HTTP/1.1\r\n" +
               "Host: " + host + "\r\n" + 
               "Connection: close\r\n\r\n");

  Serial.println();
  Serial.println("closing connection");
}

Answer 1

它不发送的原因是因为主机错了，我指的是我的网站名称服务器，当我应该指向常规网站名称时。我将const char* host = "ns8451.hostgator.com";更改为const char* host = "snackrefill.com";，现在就可以了！

使用NodeMCU ESP8266发送GET请求

1 个答案: