esp8266在loop中连续发包，但只有第一包服务端有返回
如题，使用一块ESP-01，例子代码如下，http请求到服务端，服务端是没问题的，但loop中只返回一次结果，后面就connection fail了，测好久了都没办法，请大家指点/*
*This sketch sends data via HTTP GET requests to data.sparkfun.com service.
*
*You need to get streamId and privateKey at data.sparkfun.com and paste them
*below. Or just customize this script to talk to other HTTP servers.
*
*/
#include <ESP8266WiFi.h>
const char* ssid = "your-ssid";
const char* password = "your-password";
const char* host = "data.sparkfun.com";
const char* streamId = "....................";
const char* privateKey = "....................";
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);
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)) {
Serial.println("connection failed");
return;
}
// We now create a URI for the request
String url = "/input/";
url += streamId;
url += "?private_key=";
url += privateKey;
url += "&value=";
url += value;
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");
delay(10);
// Read all the lines of the reply from server and print them to Serial
while(client.available()){
String line = client.readStringUntil('\r');
Serial.print(line);
}
Serial.println();
Serial.println("closing connection");
}
之前没用<ESP8266WiFi.h>库直接写AT指令时，记得有一个关闭TCP连接的AT指令，这个库里没有相关的关闭方法，难道数据包发送完只能delay几秒等他自动断开TCP连接才能开始下一个循环？ 为了排除服务端的问题，自建了WEB服务器，可惜也只能接到4包数据。。
Requesting URL: /test.ashx?private_key=key123456&value=4
HTTP/1.1 200 OK
Cache-Control: private
Content-Type: text/plain; charset=utf-8
Server: Microsoft-IIS/7.0
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Sun, 31 Jan 2016 02:55:34 GMT
Connection: close
Content-Length: 7
value:4
closing connection
再向下就连接失败了。。
connecting to 139.196.12.2
connection failed
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