Membuat Web Server di ESP32

Tampilan Web

Koding

	// Library
	#include <WiFi.h>

	// PIN LED
	#define LED_BUILTIN 2

	// SSID dan Password WiFi
	const char *ssid = "RobotikID";
	const char *password = "123456789";

	// Objek kelas WiFiServer
	// 80 adalah port
	WiFiServer server(80);

	// variabel kontrol LED dan Penampil di client
	bool isLive = false;
	String header;

	void setup() {
	// Atur PIN LED jadi Output
	pinMode(LED_BUILTIN, OUTPUT);

	// Serial Monitor
	Serial.begin(115200);
	Serial.println();
	Serial.println("Mulai Konfigurasi");

	// Menghubungkan ke WiFi
	Serial.print("Connecting to ");
	Serial.println(ssid);
	WiFi.begin(ssid, password);
	while (WiFi.status() != WL_CONNECTED) {
	delay(500);
	Serial.print(".");
	}

	// Menampilkan Alamat IP dan Memulai web server
	Serial.println("");
	Serial.println("WiFi connected.");
	Serial.println("IP address: ");
	Serial.println(WiFi.localIP());
	server.begin();

	Serial.println("Memulai Server");
	}

	void loop() {
	// Mengecek apakai ada client
	WiFiClient client = server.available();

	if (client) {
	Serial.println("Client Baru");
	String currentLine = "";
	while (client.connected()) {
	if (client.available()) {

	// menerima dan koleksi data dari client request
	char c = client.read();
	header += c;
	Serial.write(c);
	if (c == '\n') {

	if (currentLine.length() == 0) {
	Serial.println();

	// header untuk http
	client.println("HTTP/1.1 200 OK");
	client.println("Content-type:text/html");
	client.println("Connection: close");
	client.println();

	// 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>");

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

	// cek header dan memberikan perintah, led hidup / mati
	if (header.indexOf("GET /26/H") >= 0) {
	isLive = true;
	digitalWrite(LED_BUILTIN, HIGH);
	}
	else if (header.indexOf("GET /27/L") >= 0) {
	isLive = false;
	digitalWrite(LED_BUILTIN, LOW);
	}

	// cek yang akan ditampilkan ke client
	if (isLive == false) {
	client.print("<p><a href=\"/26/H\"><button class=\"button\"> Hidupkan LED </button></a></p><br>");
	}
	else {
	client.print("<p><a href=\"/27/L\"><button class=\"button button2\">Matikan LED </button></a></p><br>");
	}

	client.println("</body></html>");
	client.println();
	break;
	} else {

	// mengosongkan nilai
	currentLine = "";
	}
	} else if (c != '\r') {

	// mengumpulkan karakter dari client request
	currentLine += c;
	}
	}
	}

	// Tutup Koneksi
	header = "";
	client.stop();
	Serial.println("Client Disconnected.");
	Serial.println();
	}
	}