RoboCircuits
Published © CC BY-NC-ND

Host website on ESP32

ESP32 Webserver

BeginnerFull instructions provided1 hour605
Host website on ESP32

Things used in this project

Hardware components

FireBeetle ESP32 IOT Microcontroller (Supports Wi-Fi & Bluetooth)
DFRobot FireBeetle ESP32 IOT Microcontroller (Supports Wi-Fi & Bluetooth)
×1
Arduino UNO
Arduino UNO
×1
LED (generic)
LED (generic)
×2

Software apps and online services

Arduino IDE
Arduino IDE

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)
Solder Wire, Lead Free
Solder Wire, Lead Free

Story

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Code

Arudino Code

Arduino
// Load Wi-Fi library
#include <WiFi.h>
#include <WiFiClient.h>
#include <WebServer.h>
#include <ESPmDNS.h>

// Replace with your network credentials
const char* ssid = "KUTIC 2.4G";
const char* password = "123454321";

// Set web server port number to 80
WebServer server(80);

// Variable to store the HTTP request
String header;

// Auxiliar variables to store the current output state
String led1State = "off";
String led2State = "off";

// Assign output variables to GPIO pins
const int outputled1 = led1;
const int outputled2 = led2;

// 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(outputled1, OUTPUT);
  pinMode(outputled2, OUTPUT);
  // Set outputs to LOW
  digitalWrite(outputled1, LOW);
  digitalWrite(outputled2, 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(".");
  }

  if (!MDNS.begin("robocircuits")) {
    Serial.println("Error setting up MDNS responder!");
    while (1) {
      delay(1000);
    }
  }
  Serial.println("mDNS responder started");

  // 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,
    currentTime = millis();
    previousTime = currentTime;
    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() && 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 /led1/on") >= 0) {
              Serial.println("GPIO led1 on");
              led1State = "on";
              digitalWrite(outputled1, HIGH);
            } else if (header.indexOf("GET /led1/off") >= 0) {
              Serial.println("GPIO led1 off");
              led1State = "off";
              digitalWrite(outputled1, LOW);
            } else if (header.indexOf("GET /led2/on") >= 0) {
              Serial.println("GPIO led2 on");
              led2State = "on";
              digitalWrite(outputled2, HIGH);
            } else if (header.indexOf("GET /led2/off") >= 0) {
              Serial.println("GPIO led2 off");
              led2State = "off";
              digitalWrite(outputled2, 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: #4CAF50; border: none; color: white; padding: 16px 40px;");
            client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
            client.println(".button2 {background-color: #555555;}</style></head>");

            // Web Page Heading
            client.println("<body><h1>ESP32 Web Server with mDNS</h1>");
            client.println("<body><h1>RoboCircuits</h1>");

            // Display current state, and ON/OFF buttons for GPIO led1
            client.println("<p>GPIO led1 - State " + led1State + "</p>");
            // If the led1State is off, it displays the ON button
            if (led1State == "off") {
              client.println("<p><a href=\"/led1/on\"><button class=\"button\">ON</button></a></p>");
            } else {
              client.println("<p><a href=\"/led1/off\"><button class=\"button button2\">OFF</button></a></p>");
            }

            // Display current state, and ON/OFF buttons for GPIO led2
            client.println("<p>GPIO led2 - State " + led2State + "</p>");
            // If the led2State is off, it displays the ON button
            if (led2State == "off") {
              client.println("<p><a href=\"/led2/on\"><button class=\"button\">ON</button></a></p>");
            } else {
              client.println("<p><a href=\"/led2/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("");
  }
}

Credits

RoboCircuits

RoboCircuits

37 projects • 216 followers
YouTuber, Explorer, Creator, Programmer, Arduino Lover and Engineer

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