Blub Controling Using Web Page

Just Do Electronics September 21, 2019

ESP8266 Web Server with Arduino IDE

In this project you’ll create a standalone web server with an ESP8266 that can toggle two LED's using Arduino IDE. This ESP8266 Web Server is mobile responsive and it can be accessed with any device that as a browser in your local network.

Webpage

Conections

CODE

 
#include <ESP8266WiFi.h>



// Replace with your network credentials

const char* ssid     = "Just Do Electronics";

const char* password = "123456789";



// Set web server port number to 80

WiFiServer server(80);



// Variable to store the HTTP request

String header;



// Auxiliar variables to store the current output state

String output5State = "off";

String output4State = "off";



// Assign output variables to GPIO pins

const int output5 = 5;

const int output4 = 4;



// Current time

unsigned long currentTime = millis();

// Previous time

unsigned long previousTime = 0; 

// Define timeout time in milliseconds (example: 2000ms = 2s)

const long timeoutTime = 2000;



void setup() {

  Serial.begin(115200);

  // Initialize the output variables as outputs

  pinMode(output5, OUTPUT);

  pinMode(output4, OUTPUT);

  // Set outputs to LOW

  digitalWrite(output5, LOW);

  digitalWrite(output4, LOW);



  // Connect to Wi-Fi network with SSID and password

  Serial.print("Connecting to ");

  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {

    delay(500);

    Serial.print(".");

  }

  // Print local IP address and start web server

  Serial.println("");

  Serial.println("WiFi connected.");

  Serial.println("IP address: ");

  Serial.println(WiFi.localIP());

  server.begin();

}



void loop(){

  WiFiClient client = server.available();   // Listen for incoming clients



  if (client) {                             // If a new client connects,

    Serial.println("New Client.");          // print a message out in the serial port

    String currentLine = "";                // make a String to hold incoming data from the client

    currentTime = millis();

    previousTime = currentTime;

    while (client.connected() && currentTime - previousTime <= timeoutTime) { // loop while the client's connected

      currentTime = millis();         

      if (client.available()) {             // if there's bytes to read from the client,

        char c = client.read();             // read a byte, then

        Serial.write(c);                    // print it out the serial monitor

        header += c;

        if (c == '\n') {                    // if the byte is a newline character

          // if the current line is blank, you got two newline characters in a row.

          // that's the end of the client HTTP request, so send a response:

          if (currentLine.length() == 0) {

            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)

            // and a content-type so the client knows what's coming, then a blank line:

            client.println("HTTP/1.1 200 OK");

            client.println("Content-type:text/html");

            client.println("Connection: close");

            client.println();

            

            // turns the GPIOs on and off

            if (header.indexOf("GET /5/on") >= 0) {

              Serial.println("GPIO 5 on");

              output5State = "on";

              digitalWrite(output5, HIGH);

            } else if (header.indexOf("GET /5/off") >= 0) {

              Serial.println("GPIO 5 off");

              output5State = "off";

              digitalWrite(output5, LOW);

            } else if (header.indexOf("GET /4/on") >= 0) {

              Serial.println("GPIO 4 on");

              output4State = "on";

              digitalWrite(output4, HIGH);

            } else if (header.indexOf("GET /4/off") >= 0) {

              Serial.println("GPIO 4 off");

              output4State = "off";

              digitalWrite(output4, LOW);

            }

            

            // Display the HTML web page

            client.println("<!DOCTYPE html><html>");

            client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");

            client.println("<link rel=\"icon\" href=\"data:,\">");

            // CSS to style the on/off buttons 

            // Feel free to change the background-color and font-size attributes to fit your preferences

            client.println("<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}");

            client.println(".button { background-color:   #7CFC00; border: none; color: white; padding: 25px 40px;");

            client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");

            client.println(".button2 {background-color: #FF0000;}</style></head>");

            

            // Web Page Heading

            client.println("<body><h1>
 Just Do Electronics </h1>
");

            

            // Display current state, and ON/OFF buttons for GPIO 5  

            client.println("<p>
Light - State " + output5State + "</p>
");

            // If the output5State is off, it displays the ON button       

            if (output5State=="off") {

              client.println("<p>
<a href=\"/5/on\"><button class=\"button\">ON</button></a></p>
");

            } else {

              client.println("<p>
<a href=\"/5/off\"><button class=\"button button2\">OFF</button></a></p>
");

            } 

               

            // Display current state, and ON/OFF buttons for GPIO 4  

           

            client.println("</body></html>");

            

            // The HTTP response ends with another blank line

            client.println();

            // Break out of the while loop

            break;

          } else { // if you got a newline, then clear currentLine

            currentLine = "";

          }

        } else if (c != '\r') {  // if you got anything else but a carriage return character,

          currentLine += c;      // add it to the end of the currentLine

        }

      }

    }

    // Clear the header variable

    header = "";

    // Close the connection

    client.stop();

    Serial.println("Client disconnected.");

    Serial.println("");

  }

}

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