Ruchir Sharma
Published © GPL3+

Automation Using NodeMCU

I have described about relay and how to control relay using web server.

BeginnerFull instructions provided1 hour15,834
Automation Using NodeMCU

Things used in this project

Hardware components

NodeMCU ESP8266 Breakout Board
NodeMCU ESP8266 Breakout Board
×1
Relay (generic)
×1
LED (generic)
LED (generic)
×1

Software apps and online services

Arduino IDE
Arduino IDE

Story

Read more

Code

webserver using Nodemcu

Arduino
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>


MDNSResponder mdns;


const char* ssid = "none"; // your connection name
const char* password = "none"; // your connection password

ESP8266WebServer server(80);

int gpio1_pin = 2;  // D4 of nodemcu
int gpio2_pin = 13; // D7 of nodemcu
int gpio3_pin =14; //  D5 of nodemcu




//Check if header is present and correct
bool is_authentified(){
  Serial.println("Enter is authentified");
  if (server.hasHeader("Cookie")){
    Serial.print("Found cookie: ");
    String cookie = server.header("Cookie");
    Serial.println(cookie);
    if (cookie.indexOf("ESPSESSIONID=1") != -1) {
      Serial.println("Authentification Successful");
      return true;
    }
  }
  Serial.println("Authentification Failed");
  return false;
}

//login page, also called for disconnect
void handleLogin(){
  String msg;
  if (server.hasHeader("Cookie")){
    Serial.print("Found cookie: ");
    String cookie = server.header("Cookie");
    Serial.println(cookie);
  }
  if (server.hasArg("DISCONNECT")){
    Serial.println("Disconnection");
    server.sendHeader("Location","/login");
    server.sendHeader("Cache-Control","no-cache");
    server.sendHeader("Set-Cookie","ESPSESSIONID=0");
    server.send(301);
    return;
  }
  if (server.hasArg("USERNAME") && server.hasArg("PASSWORD")){
    if (server.arg("USERNAME") == "admin" &&  server.arg("PASSWORD") == "root" ) // enter ur username and password you want
    {
      server.sendHeader("Location","/");
      server.sendHeader("Cache-Control","no-cache");
      server.sendHeader("Set-Cookie","ESPSESSIONID=1");
      server.send(301);
      Serial.println("Log in Successful");
      return;

      }

  msg = "Wrong username/password! try again.";
  Serial.println("Log in Failed");
  }
  String content = "<html><body style='background-color:MediumAquaMarine'><form action='/login' method='POST'><p  align ='center' style='font-size:300%;'><u><b><i>  Log In  </i></b></u></p><br>";
  content += " <p   align ='center' style='font-size:160%'><b> UserName:<input type='text' name='USERNAME' placeholder='user name' required></b></p><br>";
  content += "<p  align ='center' style='font-size:160%'><b>Password:<input type='password' name='PASSWORD' placeholder='password' required></b></p><br>";
  content += "<p  align ='center' style='font-size:160%'><input type='submit' name='SUBMIT' value='Submit'></form>" + msg + "</p><br> </body></html>";
  server.send(200, "text/html", content);
}

//root page can be accessed only if authentification is ok
void handleRoot(){
  Serial.println("Enter handleRoot");
  String header;
  if (!is_authentified()){
    server.sendHeader("Location","/login");
    server.sendHeader("Cache-Control","no-cache");
    server.send(301);
    return;
  }
  String content =  "<body style='background: #80c6f7'><h1 align ='center'><b><u><i><strong>HOME AUTOMATION</strong></i></u></b></h1><br><p align ='center'>Switch #1 <a href=\"switch1On\"><button>ON</button></a>&nbsp;<a href=\"switch1Off\"><button>OFF</button></a></p>";
  content += "<br><p  align ='center'>Switch #2 <a href=\"switch2On\"><button>ON</button></a>&nbsp;<a href=\"switch2Off\"><button>OFF</button></a></p>";
  content += "<br><p  align ='center'>Switch #3 <a href=\"switch3On\"><button>ON</button></a>&nbsp;<a href=\"switch3Off\"><button>OFF</button></a></p>";
  content += "<br><p><marquee direction='right'>Developed by   RUCHIR SHARMA </marquee></p>";
  content += "<br><br><br><br> <footer><p>Posted by: Ruchir Sharma</p><p><a href=\"mailto:someone@example.com\">ruchir1677@gmail.com</a>.</p></footer></body>"; 
  
   if (server.hasHeader("User-Agent")){
    content += "the user agent used is : " + server.header("User-Agent") + "<br><br>";
    
    
  }
  content += "You can access this page until you <a href=\"/login?DISCONNECT=YES\">disconnect</a></body></html>";
  server.send(200, "text/html", content);
}

//no need authentification
void handleNotFound(){
  String message = "File Not Found\n\n";
  message += "URI: ";
  message += server.uri();
  message += "\nMethod: ";
  message += (server.method() == HTTP_GET)?"GET":"POST";
  message += "\nArguments: ";
  message += server.args();
  message += "\n";
  for (uint8_t i=0; i<server.args(); i++){
    message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
  }
  server.send(404, "text/plain", message);
}



void setup(void){


   // preparing GPIOs
  pinMode(gpio1_pin, OUTPUT);
  digitalWrite(gpio1_pin, LOW);
  pinMode(gpio2_pin, OUTPUT);
  digitalWrite(gpio2_pin, LOW);
  pinMode(gpio3_pin, OUTPUT);
  digitalWrite(gpio3_pin, LOW);
  
  
  delay(1000);
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  Serial.println("");

  Serial.begin(115200);
  WiFi.begin(ssid, password);
  Serial.println("");

  // Wait for connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to ");
  Serial.println(ssid);
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  if (mdns.begin("esp8266", WiFi.localIP())) {
    Serial.println("MDNS responder started");
  }


  server.on("/", handleRoot);
  server.on("/login", handleLogin);
  server.on("/inline", [](){
    server.send(200, "text/plain", "this works without need of authentification");
  });

  server.onNotFound(handleNotFound);
  //here the list of headers to be recorded
  const char * headerkeys[] = {"User-Agent","Cookie"} ;
  size_t headerkeyssize = sizeof(headerkeys)/sizeof(char*);
  //ask server to track these headers
  server.collectHeaders(headerkeys, headerkeyssize );


  server.on("/",[](){
   //
  });
  server.on("/switch1On", [](){
   // 
    digitalWrite(gpio1_pin, HIGH);
    delay(1000);
  });
  server.on("/switch1Off", [](){
 //  
    digitalWrite(gpio1_pin, LOW);
    delay(1000); 
  });
  server.on("/switch2On", [](){
  //
    digitalWrite(gpio2_pin, HIGH);
    delay(1000);
  });
  server.on("/switch2Off", [](){
    //
    digitalWrite(gpio2_pin, LOW);
    delay(1000); 
  });
  server.on("/switch3On", [](){
    digitalWrite(gpio3_pin, HIGH);
    delay(1000);
  });
  server.on("/switch3Off", [](){
    digitalWrite(gpio3_pin, LOW);
    delay(1000); 
  });


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

void loop(void){
  server.handleClient();
}

Credits

Ruchir Sharma

Ruchir Sharma

12 projects • 180 followers

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