XMLHTTP --- ERR_CONNECTION_RESET - PullRequest
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XMLHTTP --- ERR_CONNECTION_RESET

0 голосов
/ 11 января 2020

Я работаю над проектом теплицы (ESP32). Следующий код должен записывать данные на веб-сервер (датчики) и считывать состояние переключателя для ручного управления устройствами. Мне удалось заставить его работать, но консоль продолжает выдавать ERR: CONNECTION RESET при вызове setLED запроса. Коммутаторы сами по себе работают нормально, но так как я никогда не работал с XMLHttp, я думаю, что где-то допустил ошибку. 

VM385:1 GET http://192.168.0.104/setLED?lamp=false&pump=false&fan=false net::ERR_CONNECTION_RESET

const char MAIN_page[] PROGMEM = R"=====(
<!DOCTYPE html>
<html>
<style>
.card{
    max-width: 400px;
     min-height: 250px;
     background: #02b875;
     padding: 30px;
     box-sizing: border-box;
     color: #FFF;
     margin:20px;
     box-shadow: 0px 2px 18px -4px rgba(0,0,0,0.75);
}

.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
}

.switch input { 
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: .4s;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  -webkit-transition: .4s;
  transition: .4s;
}

input:checked + .slider {
  background-color: #2196F3;
}

input:checked + .slider:before {
  -webkit-transform: translateX(26px);
  -ms-transform: translateX(26px);
  transform: translateX(26px);
}

/* Rounded sliders */
.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

</style>
<head>
<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<meta charset='urf-8'>
</head>
<body>

<div class="card">
  <h4>The ESP32 Update web page without refresh</h4><br>
  <h1>Temperature: <span id="temp">0</span> C</h1><br>
  <h1>Humidity: <span id="humidity">0</span> %</h1><br>
  <h1>Water moisture: <span id="watermoisture">0</span> %</h1><br>
  LAMP
  <br>
<label class="switch">
  <input class="controls" id="lamp"type="checkbox">
  <span class="slider round"></span>
</label><br>
<br>
PUMP
<br>
<label class="switch">
  <input class="controls"  id="pump"type="checkbox">
  <span class="slider round"></span>
</label><br>
<br>
FAN
<br>
<label class="switch">
  <input class="controls" id="fan"type="checkbox">
  <span class="slider round"></span>
</label><br>
</div>
<script>

setInterval(function() {
  // Call a function repetatively with 2 Second interval
  getData();
}, 2000); //2000mSeconds update rate

function getData() {
  var xhttp = new XMLHttpRequest();
  xhttp.onreadystatechange = function() {
    if (this.readyState == 4 && this.status == 200) {
      var data = this.responseText.split("\t");
      document.getElementById("temp").innerHTML = data[0];
      document.getElementById("humidity").innerHTML = data[1];
      document.getElementById("watermoisture").innerHTML = data[2];
    }
  };
  xhttp.open("GET", "readADC", true);
  xhttp.send();
  var states = [false,false,false];
  var xhr = new XMLHttpRequest();
  var controls = document.getElementsByClassName("controls");
  for(var i=0;i<controls.length;i++){
    if(controls[i].checked) states[i]=true;
    if(!controls[i].checked) states[i]=false;
  }
  console.log(states);
  var arguments = "lamp=" + states[0] + "&pump=" + states[1] + "&fan=" + states[2];
  xhr.open("GET", "/setLED?" + arguments, true);
  xhr.send();
}
</script>
</body>
</html>
)=====";

/*
 * ESP32 AJAX Demo
 * Updates and Gets data from webpage without page refresh
 * https://circuits4you.com
 */
#include <WiFi.h>
#include <WiFiClient.h>
#include <WebServer.h>
#include <DHT.h>

#include "index.h"  //Web page header file

WebServer server(80);

#define DHTPIN 25
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

//Enter your SSID and PASSWORD
const char* ssid = "";
const char* password = "";

//===============================================================
// This routine is executed when you open its IP in browser
//===============================================================
void handleRoot() {
 server.send(200, "text/html", MAIN_page); //Send web page
}

void handleADC() {
 String adcValue;
 float a = dht.readHumidity();
 float b = dht.readTemperature();
 String humidity = String(a);
 String temperature = String(b);
 adcValue += "10";
 adcValue += "\t";
 adcValue += "25";
 adcValue += "\t";
 adcValue += "30";
 server.send(200, "text/plain", adcValue); //Send ADC value only to client ajax request
}

 void handleLED() {

String lampstate = server.arg("lamp");
String pumpstate = server.arg("pump");
String fanstate = server.arg("fan");

Serial.println(lampstate);
Serial.println(pumpstate);
Serial.println(fanstate);
}


//===============================================================
// Setup
//===============================================================

void setup(void){
  Serial.begin(115200);
  Serial.println();
  Serial.println("Booting Sketch...");

  WiFi.mode(WIFI_STA); //Connectto your wifi
  WiFi.begin(ssid, password);

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

  //Wait for WiFi to connect
  while(WiFi.waitForConnectResult() != WL_CONNECTED){      
      Serial.print(".");
    }

  //If connection successful show IP address in serial monitor
  Serial.println("");
  Serial.print("Connected to ");
  Serial.println(ssid);
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());  //IP address assigned to your ESP
//----------------------------------------------------------------

  server.on("/", handleRoot);   
  server.on("/readADC", handleADC);
  server.on("/setLED", handleLED);

  server.begin();                  //Start server
  Serial.println("HTTP server started");
  dht.begin();
}

//===============================================================
// This routine is executed when you open its IP in browser
//===============================================================
void loop(void){
  server.handleClient();
  delay(1);
}
...