Kode Program

Program Mengontrol LED Sederhana di dalam ESP32 menggunakan Arduino IDE dengan HTML (Web Server)

20 Nov 2024 0

Halo semuanya! Berjumpa dengan Miniblog dari Inzaghi's Blog! Kali ini kita akan membuat Program Mengontrol LED Sederhana di dalam ESP32 menggunakan Arduino IDE dengan HTML (Web Server).

Berikut ini adalah Program Mengontrol LED Sederhana di dalam ESP32 menggunakan Arduino IDE dengan HTML (Web Server).

Inilah Alat dan Bahan yang harus disiapkan :

ESP32
Kabel USB

1. Tampilan Sederhana (Hanya HTML)

Pertama, bukalah Arduino IDE dan inilah Kode Programnya :

#include <WiFi.h>

const char* ssid = "Nama Wi-Fi Anda";
const char* password = "Password Wi-Fi Anda";

WiFiServer server(80);
String currentLine = ""; // Define currentLine as a String

void setup() {
  Serial.begin(115200);
  pinMode(2, OUTPUT);
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nConnected");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());
  server.begin();
}

void loop() {
  WiFiClient client = server.available(); // Check if there is a client connected
  if (client) {
    Serial.println("New Client Connected");
    currentLine = ""; // Clear the current line before starting to read from the client

    while (client.connected()) {
      if (client.available()) {
        char c = client.read(); // Read the next character from the client
        Serial.write(c);

        if (c == '\n') {
          if (currentLine.length() == 0) {
            // Send an HTML response
            client.println("HTTP/1.1 200 OK");
            client.println("Content-Type: text/html");
            client.println("Connection: close");
            client.println();
            client.println("<!DOCTYPE HTML>");
            client.println("<html>");
            client.println("<h1>Control LED Link on ESP32</h1>");
            client.println("<a>LED pin 2 Button :</a>");
            client.println("<br>");
            client.println("<a href=\"/H\">Turn ON</a> <br>");
            client.println("<a href=\"/L\">Turn OFF</a> <br>");
            client.println("</html>");
            break;
          } else {
            currentLine = ""; // Clear the current line for the next request
          }
        } else if (c != '\r') {
          currentLine += c;
        }

        // Check if the client has requested to turn the LED ON
        if (currentLine.endsWith("GET /H")) {
          digitalWrite(2, HIGH);
        }

        // Check if the client has requested to turn the LED OFF
        if (currentLine.endsWith("GET /L")) {
          digitalWrite(2, LOW);
        }
      }
    }

    // Close the connection
    client.stop();
    Serial.println("Client Disconnected");
  }
}

Output :

2. Tampilan Bagus (Dengan HTML dan CSS)

Untuk menggunakan sedikit GUI dengan HTML dan CSS, bukalah Arduino IDE dan inilah Kode Programnya :

#include <WiFi.h>

const char* ssid = "Nama Wi-Fi Anda";
const char* password = "Password Wi-Fi Anda";

WiFiServer server(80);
String currentLine = ""; // Define currentLine as a String

void setup() {
  Serial.begin(115200);
  pinMode(2, OUTPUT); // LED pin
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nConnected");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());
  server.begin();
}

void loop() {
  WiFiClient client = server.available(); // Check if there is a client connected
  if (client) {
    Serial.println("New Client Connected");
    currentLine = ""; // Clear the current line before starting to read from the client

    while (client.connected()) {
      if (client.available()) {
        char c = client.read(); // Read the next character from the client
        Serial.write(c);

        if (c == '\n') {
          if (currentLine.length() == 0) {
            // Send an HTML response
            client.println("HTTP/1.1 200 OK");
            client.println("Content-Type: text/html");
            client.println("Connection: close");
            client.println();
            client.println("<!DOCTYPE html>");
            client.println("<html lang=\"en\">");
            client.println("<head>");
            client.println("<meta charset=\"UTF-8\">");
            client.println("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">");
            client.println("<link rel=\"icon\" href=\"data:,\">");
            client.println("<style>");
            client.println("body { font-family: Arial, sans-serif; text-align: center; margin-top: 50px; }");
            client.println(".button { padding: 15px 30px; font-size: 16px; border: none; border-radius: 5px; cursor: pointer; margin: 10px; }");
            client.println(".on { background-color: green; color: white; }");
            client.println(".off { background-color: red; color: white; }");
            client.println("</style>");
            client.println("<title>Control LED Link on ESP32</title>");
            client.println("</head>");
            client.println("<body>");
            client.println("<h1>Control LED Link on ESP32</h1>");
            client.println("<p>LED pin 2 Button :</p>");
            client.println("<br>");
            client.println("<a href=\"/H\" class=\"button on\">Turn ON</a>");
            client.println("<a href=\"/L\" class=\"button off\">Turn OFF</a>");
            client.println("</body>");
            client.println("</html>");
            break;
          } else {
            currentLine = ""; // Clear the current line for the next request
          }
        } else if (c != '\r') {
          currentLine += c;
        }

        // Check if the client has requested to turn the LED ON
        if (currentLine.endsWith("GET /H")) {
          digitalWrite(2, HIGH);
        }

        // Check if the client has requested to turn the LED OFF
        if (currentLine.endsWith("GET /L")) {
          digitalWrite(2, LOW);
        }
      }
    }

    // Close the connection
    client.stop();
    Serial.println("Client Disconnected");
  }
}

Atau ini :

#include <WiFi.h>

const char* ssid = "Nama Wi-Fi Anda";
const char* password = "Password Wi-Fi Anda";

WiFiServer server(80);
String currentLine = ""; // Define currentLine as a String

// Function to generate HTML Header
String generateHTML() {
  String html = "<!DOCTYPE html>";
  html += "<html lang=\"en\">";
  html += "<head>";
  html += "<meta charset=\"UTF-8\">";
  html += "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">";
  html += "<link rel=\"icon\" href=\"data:,\">";
  html += "<style>";
  html += "body { font-family: Arial, sans-serif; text-align: center; margin-top: 50px; }";
  html += ".button { padding: 15px 30px; font-size: 16px; border: none; border-radius: 5px; cursor: pointer; margin: 10px; }";
  html += ".on { background-color: green; color: white; }";
  html += ".off { background-color: red; color: white; }";
  html += "</style>";
  html += "<title>Control LED Link on ESP32</title>";
  html += "</head>";
  html += "<body>";
  html += "<h1>Control LED Link on ESP32</h1>";
  html += "<p>LED pin 2 Button :</p>";
  html += "<br>";
  html += "<a href=\"/H\" class=\"button on\">Turn ON</a>";
  html += "<a href=\"/L\" class=\"button off\">Turn OFF</a>";
  html += "</body>";
  html += "</html>";
  return html;
}

void setup() {
  Serial.begin(115200);
  pinMode(2, OUTPUT); // LED pin
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nConnected");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());
  server.begin();
}

void loop() {
  WiFiClient client = server.available(); // Check if there is a client connected
  if (client) {
    Serial.println("New Client Connected");
    currentLine = ""; // Clear the current line before starting to read from the client

    while (client.connected()) {
      if (client.available()) {
        char c = client.read(); // Read the next character from the client
        Serial.write(c);

        if (c == '\n') {
          if (currentLine.length() == 0) {
            // Send the HTTP response with the HTML header
            client.println("HTTP/1.1 200 OK");
            client.println("Content-Type: text/html");
            client.println("Connection: close");
            client.println();
            client.print(generateHTML());
            break;
          } else {
            currentLine = ""; // Clear the current line for the next request
          }
        } else if (c != '\r') {
          currentLine += c;
        }

        // Check if the client has requested to turn the LED ON
        if (currentLine.endsWith("GET /H")) {
          digitalWrite(2, HIGH);
        }

        // Check if the client has requested to turn the LED OFF
        if (currentLine.endsWith("GET /L")) {
          digitalWrite(2, LOW);
        }
      }
    }

    // Close the connection
    client.stop();
    Serial.println("Client Disconnected");
  }
}

Atau yang ini :

#include <WiFi.h>

const char* ssid = "Nama Wi-Fi Anda";
const char* password = "Password Wi-Fi Anda";

WiFiServer server(80);
String currentLine = ""; // Define currentLine as a String

void setup() {
  Serial.begin(115200);
  pinMode(2, OUTPUT); // LED pin
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nConnected");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());
  server.begin();
}

void loop() {
  WiFiClient client = server.available(); // Check if there is a client connected
  if (client) {
    Serial.println("New Client Connected");
    currentLine = ""; // Clear the current line before starting to read from the client

    while (client.connected()) {
      if (client.available()) {
        char c = client.read(); // Read the next character from the client
        Serial.write(c);

        if (c == '\n') {
          if (currentLine.length() == 0) {
            // HTML response as a single string
            String htmlPage = R"rawliteral(
            <!DOCTYPE html>
            <html lang="en">
            <head>
                <meta charset="UTF-8">
                <meta name="viewport" content="width=device-width, initial-scale=1.0">
                <link rel="icon" href="data:,">
                <style>
                    body { font-family: Arial, sans-serif; text-align: center; margin-top: 50px; }
                    .button { padding: 15px 30px; font-size: 16px; border: none; border-radius: 5px; cursor: pointer; margin: 10px; }
                    .on { background-color: green; color: white; }
                    .off { background-color: red; color: white; }
                </style>
                <title>Control LED Link on ESP32</title>
            </head>
            <body>
                <h1>Control LED Link on ESP32</h1>
                <p>LED pin 2 Button :</p>
                <br>
                <a href="/H" class="button on">Turn ON</a>
                <a href="/L" class="button off">Turn OFF</a>
            </body>
            </html>
            )rawliteral";

            // Send HTTP response
            client.println("HTTP/1.1 200 OK");
            client.println("Content-Type: text/html");
            client.println("Connection: close");
            client.println();
            client.print(htmlPage);
            break;
          } else {
            currentLine = ""; // Clear the current line for the next request
          }
        } else if (c != '\r') {
          currentLine += c;
        }

        // Check if the client has requested to turn the LED ON
        if (currentLine.endsWith("GET /H")) {
          digitalWrite(2, HIGH);
        }

        // Check if the client has requested to turn the LED OFF
        if (currentLine.endsWith("GET /L")) {
          digitalWrite(2, LOW);
        }
      }
    }

    // Close the connection
    client.stop();
    Serial.println("Client Disconnected");
  }
}