WEB SERVER HOME AUTOMATION || ESP8266 NODEMCU WIFI MODULE|| AMICA || LOLLIN
COMPONENTS LIST:
1. NODE-MCU ESP8266.
2. 4 CHANNEL RELAY BOARD.
CIRCUIT:
CODE:
/*********
mkinventions madhan chiruguri
*********/
// Load Wi-Fi library
#include<ESP8266WiFi.h>
// Replace with your network credentials
const char* ssid = "MKinventions & Robotics";
const char* password = "alpha123";
// 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 LIGHT1_STATUS = "off"; //D1(GPIO5)--LIGHT1
String LIGHT2_STATUS = "off"; //D2(GPIO4)--LIGHT2
String LIGHT3_STATUS = "off"; //D3(GPIO0)--LIGHT3
String LIGHT4_STATUS = "off"; //D4(GPIO2)--LIGHT4
// Assign output variables to GPIO pins
const int LIGHT1 = 5; //D1(GPIO5)--LIGHT1
const int LIGHT2 = 4; //D2(GPIO4)--LIGHT2
const int LIGHT3 = 0; //D3(GPIO0)--LIGHT3
const int LIGHT4 = 2; //D4(GPIO2)--LIGHT4
// 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(LIGHT1, OUTPUT); //D1(GPIO5)--LIGHT1
pinMode(LIGHT2, OUTPUT); //D2(GPIO4)--LIGHT2
pinMode(LIGHT3, OUTPUT); //D3(GPIO0)--LIGHT33
pinMode(LIGHT4, OUTPUT); //D4(GPIO2)--LIGHT4
// Set outputs to LOW
digitalWrite(LIGHT1, LOW); //D1
digitalWrite(LIGHT2, LOW); //D2
digitalWrite(LIGHT3, LOW); //D3
digitalWrite(LIGHT4, LOW); //D4
// 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();
//********BUTTON 1*****************************
// turns the GPIOs on and off
if (header.indexOf("GET /5/on") >= 0) {
Serial.println("GPIO 5 on");
LIGHT1_STATUS = "on";
digitalWrite(LIGHT1, HIGH);
} else if (header.indexOf("GET /5/off") >= 0) {
Serial.println("GPIO 5 off");
LIGHT1_STATUS = "off";
digitalWrite(LIGHT1, LOW);
}
//********BUTTON 2*****************************
else if (header.indexOf("GET /4/on") >= 0) {
Serial.println("GPIO 4 on");
LIGHT2_STATUS = "on";
digitalWrite(LIGHT2, HIGH);
} else if (header.indexOf("GET /4/off") >= 0) {
Serial.println("GPIO 4 off");
LIGHT2_STATUS = "off";
digitalWrite(LIGHT2, LOW);
}
//********BUTTON 3*****************************
else if (header.indexOf("GET /0/on") >= 0) {
Serial.println("GPIO 0 on");
LIGHT3_STATUS = "on";
digitalWrite(LIGHT3, HIGH);
} else if (header.indexOf("GET /0/off") >= 0) {
Serial.println("GPIO 0 off");
LIGHT3_STATUS = "off";
digitalWrite(LIGHT3, LOW);
}
//********BUTTON 4*****************************
else if (header.indexOf("GET /2/on") >= 0) {
Serial.println("GPIO 2 on");
LIGHT4_STATUS = "on";
digitalWrite(LIGHT4, HIGH);
} else if (header.indexOf("GET /2/off") >= 0) {
Serial.println("GPIO 2 off");
LIGHT4_STATUS = "off";
digitalWrite(LIGHT4, 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: #195B6A; border: none; color: white; padding: 16px 40px;");
client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
client.println(".button2 {background-color: #77878A;}</style></head>");
// Web Page Heading
client.println("<body>");
client.println("<br><h3>MKinventions : Place Of Innovative Inventions</h3>");
client.println("<br><hr>");
client.println("<h2>HOME AUTOMATION</h2>");
//********BUTTON 1*****************************
// Display current state, and ON/OFF buttons for GPIO 5
client.println("<p>LIGHT1 - STATUS " + LIGHT1_STATUS + "</p>");
// If the LIGHT1_STATUS is off, it displays the ON button
if (LIGHT1_STATUS=="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>");
}
//********BUTTON 2*****************************
// Display current state, and ON/OFF buttons for GPIO 4
client.println("<p>LIGHT2 - STATUS " + LIGHT2_STATUS + "</p>");
// If the LIGHT2_STATUS is off, it displays the ON button
if (LIGHT2_STATUS=="off") {
client.println("<p><a href=\"/4/on\"><button class=\"button\">ON</button></a></p>");
} else {
client.println("<p><a href=\"/4/off\"><button class=\"button button2\">OFF</button></a></p>");
}
//********BUTTON 3*****************************
// Display current state, and ON/OFF buttons for GPIO 0
client.println("<p>LIGHT3 - STATUS " + LIGHT3_STATUS + "</p>");
// If the LIGHT3_STATUS is off, it displays the ON button
if (LIGHT3_STATUS=="off") {
client.println("<p><a href=\"/0/on\"><button class=\"button\">ON</button></a></p>");
} else {
client.println("<p><a href=\"/0/off\"><button class=\"button button2\">OFF</button></a></p>");
}
//********BUTTON 4*****************************
// Display current state, and ON/OFF buttons for GPIO 2
client.println("<p>LIGHT4 - STATUS " + LIGHT4_STATUS + "</p>");
// If the LIGHT4_STATUS is off, it displays the ON button
if (LIGHT4_STATUS=="off") {
client.println("<p><a href=\"/2/on\"><button class=\"button\">ON</button></a></p>");
} else {
client.println("<p><a href=\"/2/off\"><button class=\"button button2\">OFF</button></a></p>");
}
client.println("<hr>");
client.println("<h3>ESP8266 Web Server</h3>");
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("");
}
}
AFTER UPLOADING THIS CODE OPEN "SERIAL MONITOR" SELECT "BAUD RATE" AND YOU WILL GET AND "IP-ADDRESS" AS SHOWN IN THE IMAGE
NOW COPY AND PASTE IN WEB BROWSER
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