HTTP协议数据通讯-客户端向服务器发送数据信息-客户端

客户端获得自身板载按键，记录按键状态，通过HTTP请求的GET方法将按键状态发送给服务端，服务端根据客户端发来的数据控制自身板载LED灯点亮、熄灭。

服务端程序

以下为客户端程序

#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>

#define buttonPin D3//定义引脚D3

ESP8266WiFiMulti wifiMulti;

bool buttonStatus;
float clientFloatValue;
int clientIntValue;

const char *host = "192.168.0.111";
const int httpPort = 80;

void setup(){
  Serial.begin(9600);
  Serial.println("");

  pinMode(buttonPin,INPUT_PULLUP);//将按键设置为输入上拉模式

  wifiMulti.addAP("1124","11241124");

  while(wifiMulti.run() != WL_CONNECTED){
    delay(250);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Wifi Connected to :\t");
  Serial.println(WiFi.SSID());
  Serial.print("IP Address:\t");
  Serial.println(WiFi.localIP());
}

void loop(){
  buttonStatus = digitalRead(buttonPin);

  //改变测试用变量数值用于服务端接收数据检测
  clientFloatValue += 1.5;
  clientIntValue += 2;

  //发送请求
  wifiClientRequest();
  delay(1000);
}

void wifiClientRequest(){
  WiFiClient wifiClient;

  //将需要发送的数据信息放入客户端请求
  String url = "/update?float="+ String(clientFloatValue)+"&int="+String(clientIntValue)+"&button="+String(buttonStatus);

  //建立字符串，用于http请求
  String httpRequest = String("GET ") + url + " HTTP/1.1\r\n"+"Host: "+host+"\r\n"+"Connection: close\r\n"+"\r\n";
  Serial.print("Connecting to :\t");
  Serial.print(host);

  if(wifiClient.connect(host,httpPort)){
    Serial.println(" Success");

    wifiClient.print(httpRequest);//向服务器发送http请求
    Serial.print("Sending request: ");
    Serial.println(httpRequest);
  }else{
    Serial.println(" Failed");
  }
  wifiClient.stop();
}