Physical Button add this code

Hello I am doing relay open and closed. on this code, I would like to add it on the physical button? Can you show me an example on the code?

// Load Wi-Fi library
#include <ESP8266WiFi.h>

// Replace with your network credentials
const char* ssid = "okhan"; // Input your wifi network name
const char* password = "atakan2009"; // Input your 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 GPIO pins
const int relay1 = 16; // GPIO5 D1
const int relay2 = 5; // GPIO4 D2
const int relay3 = 2; // GPIO0 D3
const int relay4 = 12; // GPIO2 D4

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 HIGH. relay active LOW
  digitalWrite(relay1, HIGH);
  digitalWrite(relay2, HIGH);
  digitalWrite(relay3, HIGH);
  digitalWrite(relay4, HIGH);

  // 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
    while (client.connected()) {            // loop while the client's connected
      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");
              relay1State = "on";
              digitalWrite(relay1, LOW);
            }
            else if (header.indexOf("GET /5/off") >= 0)
            {
              Serial.println("GPIO 5 off");
              relay1State = "off";
              digitalWrite(relay1, HIGH);
            }
            else if (header.indexOf("GET /4/on") >= 0) {
              Serial.println("GPIO 4 on");
              relay2State = "on";
              digitalWrite(relay2, LOW);
            }
            else if (header.indexOf("GET /4/off") >= 0) {
              Serial.println("GPIO 4 off");
              relay2State = "off";
              digitalWrite(relay2, HIGH);
            }
            else if (header.indexOf("GET /0/on") >= 0)
            {
              Serial.println("GPIO 0 on");
              relay3State = "on";
              digitalWrite(relay3, LOW);
            }
            else if (header.indexOf("GET /0/off") >= 0)
            {
              Serial.println("GPIO 0 off");
              relay3State = "off";
              digitalWrite(relay3, HIGH);
            }
            else if (header.indexOf("GET /2/on") >= 0) {
              Serial.println("GPIO 2 on");
              relay4State = "on";
              digitalWrite(relay4, LOW);
            }
            else if (header.indexOf("GET /2/off") >= 0) {
              Serial.println("GPIO 2 off");
              relay4State = "off";
              digitalWrite(relay4, HIGH);
            }

            // 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: 12px 24px;");
            client.println("text-decoration: none; font-size: 20px; margin: 2px; cursor: pointer;}");
            client.println(".button2 {background-color: #77878A;}</style></head>");

            // Web Page Heading
            client.println("<body><h1>NodeMCU Web Server</h1>");

            // Display current state, and ON/OFF buttons for GPIO 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 GPIO 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 GPIO 0
            client.println("<p>Relay 3 - State " + relay3State + "</p>");
            // If the relay1State 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 GPIO 2
            client.println("<p>Relay 4 - State " + relay4State + "</p>");
            // If the relay2State 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("");
  }
}

ykilicaslan:
Hello I am doing relay open and closed. on this code, I would like to add it on the physical button? Can you show me an example on the code?

What have you tried?

What does that program do (in detail) and what do you want it to do that is different?

...R

Thanks for the robin answer, I want to check the relay with both physical pushbutton and virtual pushbutton. I want to see the open or closed status of the web interface from the physical button, I want to check the web interface

You have not answered the questions I posed in Reply #1.

...R

String relay1State = "off";Why use one bit, when you can waste ten bytes?