ESP8266 Web Server Control Home Automation

ESP8266

Relay Module

LED

Breadboard

Jumpers

// Viral Science www.viralsciencecreativity.com www.youtube.com/c/viralscience
 // ESP8266 WebServer HomeAutomation
 
 #include <ESP8266WiFi.h>
 
 // Replace with your network credentials
 const char* ssid = "---------"; //WIFI Name
 const char* password = "---------"; //WIFI Password
 
 // 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 Relay1State = "off";
 String Relay2State = "off";
 String Relay3State = "off";
 String Relay4State = "off";
 
 // Assign output variables to Relay pins
 const int Relay1 = 12; //D6
 const int Relay2 = 16; //D0
 const int Relay3 = 5; //D1
 const int Relay4 = 4; //D2
 
 // 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(Relay1, OUTPUT);
  pinMode(Relay2, OUTPUT);
  pinMode(Relay3, OUTPUT);
  pinMode(Relay4, OUTPUT);
  // Set outputs to LOW
  digitalWrite(Relay1, LOW);
  digitalWrite(Relay2, LOW);
  digitalWrite(Relay3, LOW);
  digitalWrite(Relay4, 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 Relays on and off
  if (header.indexOf("GET /5/on") >= 0) {
  Serial.println("Relay 5 on");
  Relay1State = "on";
  digitalWrite(Relay1, HIGH);
  } else if (header.indexOf("GET /5/off") >= 0) {
  Serial.println("Relay 5 off");
  Relay1State = "off";
  digitalWrite(Relay1, LOW);
  } else if (header.indexOf("GET /4/on") >= 0) {
  Serial.println("Relay 4 on");
  Relay2State = "on";
  digitalWrite(Relay2, HIGH);
  } else if (header.indexOf("GET /4/off") >= 0) {
  Serial.println("Relay 4 off");
  Relay2State = "off";
  digitalWrite(Relay2, LOW);
  }
  else if (header.indexOf("GET /0/on") >= 0) {
  Serial.println("Relay 0 off");
  Relay3State = "on";
  digitalWrite(Relay3, HIGH);
  }
  else if (header.indexOf("GET /0/off") >= 0) {
  Serial.println("Relay 0 off");
  Relay3State = "off";
  digitalWrite(Relay3, LOW);
  }
  else if (header.indexOf("GET /2/on") >= 0) {
  Serial.println("Relay 2 off");
  Relay4State = "on";
  digitalWrite(Relay4, HIGH);
  }
  else if (header.indexOf("GET /2/off") >= 0) {
  Serial.println("Relay 2 off");
  Relay4State = "off";
  digitalWrite(Relay4, 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: #52527a; border: none; color: white; padding: 16px 40px;");
  client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
  client.println(".button2 {background-color: #d1d1e0;}</style></head>");
 
  // Web Page Heading
  client.println("<body><h1>ESP8266 Web Server HomeAutomation</h1>");
 
  // Display current state, and ON/OFF buttons for Relay 5
  client.println("<p>Relay 1 - State " + Relay1State + "</p>");
  // If the Relay1State is off, it displays the ON button
  if (Relay1State=="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 Relay 4
  client.println("<p>Relay 2 - State " + Relay2State + "</p>");
  // If the Relay2State is off, it displays the ON button
  if (Relay2State=="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>");
  }
 
  // Display current state, and ON/OFF buttons for Relay 0
  client.println("<p>Relay 3 - State " + Relay3State + "</p>");
  // If the Relay3State is off, it displays the ON button
  if (Relay3State=="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>");
  }
 
  // Display current state, and ON/OFF buttons for Relay 4
  client.println("<p>Relay 4 - State " + Relay4State + "</p>");
  // If the Relay4State is off, it displays the ON button
  if (Relay4State=="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("</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("");
  }
 }