Microcontrollers
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LEDLamp


			
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							#include "Arduino.h"
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <EEPROM.h>
#include <DNSServer.h>

const int ledPin = LED_BUILTIN; // The built-in LED on the Wemos D1 Mini is on GPIO2 (D4)

ESP8266WebServer webServer(80);
WiFiServer server(1234);
DNSServer dnsServer;

const byte DNS_PORT = 53;

// AP Daten
const char *ap_ssid = "Wemos_Setup";
const char *ap_pass = "admin123";

// WLAN Config
struct Config {
		char ssid[32];
		char pass[64];
		bool valid;
};

Config config;

// ---------- EEPROM ----------
void saveConfig() {
	EEPROM.begin(sizeof(Config));
	EEPROM.put(0, config);
	EEPROM.commit();
}

void loadConfig() {
	EEPROM.begin(sizeof(Config));
	EEPROM.get(0, config);

	if (config.valid != true) {
		config.valid = false;
	}
}

// ---------- CAPTIVE PORTAL PAGE ----------
void handleRoot() {
	String mac = WiFi.macAddress();

	String html =
			R"rawliteral(
<!DOCTYPE html>
<html>

	<script>
	function togglePassword() {
	  const pass = document.getElementById("pass");
	  const eye = document.querySelector(".toggle-eye");
	
	  if (pass.type === "password") {
		pass.type = "text";
		eye.textContent = "❌";
	  } else {
		pass.type = "password";
		eye.textContent = "👁";
	  }
	}
	</script>

<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Wemos Setup</title>

<style>
  body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #1e1e2f, #2b5876);
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
  }

  * {
	box-sizing: border-box;
  }

  .card {
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(10px);
    padding: 25px;
    border-radius: 16px;
    width: 90%;
    max-width: 360px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
    animation: fadeIn 0.8s ease;
  }

  h2 {
    margin-top: 0;
    text-align: center;
  }

  .info {
    font-size: 12px;
    opacity: 0.8;
    margin-bottom: 15px;
    text-align: center;
  }

  input {
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    border-radius: 10px;
    border: none;
    outline: none;
    font-size: 14px;
    transition: 0.2s;
  }

  input:focus {
    transform: scale(1.02);
  }

  button {
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    border: none;
    border-radius: 10px;
    background: #00c6ff;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: 0.3s;
  }

  button:hover {
    background: #0072ff;
    transform: translateY(-2px);
  }

  .mac {
    font-size: 11px;
    text-align: center;
    margin-bottom: 15px;
    opacity: 0.7;
    word-break: break-all;
  }

	.pw-wrapper {
	  position: relative;
	  width: 100%;
	  margin: 8px 0;
	}
	
	.pw-wrapper input {
	  width: 100%;
	  padding: 12px 40px 12px 12px; /* Platz für Icon rechts */
	  border-radius: 10px;
	  border: none;
	  outline: none;
	  font-size: 14px;
	  box-sizing: border-box;
	}
	
	.toggle-eye {
	  position: absolute;
	  right: 12px;
	  top: 50%;
	  transform: translateY(-50%);
	  cursor: pointer;
	  font-size: 16px;
	  opacity: 0.6;
	  user-select: none;
	  transition: 0.2s;
	}
	
	.toggle-eye:hover {
	  opacity: 1;
	}

  @keyframes fadeIn {
    from {opacity: 0; transform: translateY(10px);}
    to {opacity: 1; transform: translateY(0);}
  }
</style>
</head>

<body>

<div class="card">
  <h2>Wemos Setup</h2>

  <div class="mac">Device: )rawliteral"
					+ mac
					+ R"rawliteral(</div>

  <form action="/save" method="POST">
    <input name="ssid" placeholder="WLAN Name (SSID)">
	<div class="pw-wrapper">
	  <input id="pass" name="pass" type="password" placeholder="Passwort">
	  <span class="toggle-eye" onclick="togglePassword()">👁</span>
	</div>
    <button type="submit">Verbinden</button>
  </form>

  <div class="info">
    Verbinde deinen Wemos mit einem WLAN Netzwerk
  </div>
</div>

</body>
</html>
)rawliteral";

	webServer.send(200, "text/html", html);
}

// ---------- SAVE ----------
void handleSave() {
	String ssid = webServer.arg("ssid");
	String pass = webServer.arg("pass");

	ssid.toCharArray(config.ssid, 32);
	pass.toCharArray(config.pass, 64);
	config.valid = true;

	saveConfig();

	webServer.send(200, "text/html", "<h2>Gespeichert!</h2><p>Wemos startet neu...</p>");

	delay(1500);
	ESP.restart();
}

// ---------- NOT FOUND (CAPTIVE REDIRECT) ----------
void handleNotFound() {
	webServer.sendHeader("Location", "http://192.168.4.1/", true);
	webServer.send(302, "text/plain", "");
}

// ---------- START ACCESS POINT ----------
void startAP() {
	WiFi.mode(WIFI_AP);

	WiFi.softAP(ap_ssid, ap_pass);
	delay(500);

	IPAddress apIP = WiFi.softAPIP();
	Serial.print("AP IP: ");
	Serial.println(apIP);

	// DNS: ALLE Domains auf ESP IP umleiten
	dnsServer.start(DNS_PORT, "*", apIP);

	// Webserver Routes
	webServer.on("/", handleRoot);
	webServer.on("/save", HTTP_POST, handleSave);
	webServer.onNotFound(handleNotFound);

	webServer.begin();

	Serial.println("Captive Portal gestartet");
}

// ---------- CONNECT STA ----------
bool connectSTA() {
	WiFi.mode(WIFI_STA);
	WiFi.begin(config.ssid, config.pass);

	Serial.println();
	Serial.print("Verbinde mit WLAN: ");
	Serial.println(config.ssid);

	int tries = 0;
	while (WiFi.status() != WL_CONNECTED && tries < 20) {
		delay(500);
		Serial.print(".");
		tries++;
	}

	if (WiFi.status() == WL_CONNECTED) {
		Serial.println();
		Serial.println("\nVerbunden!");
		Serial.print("IP: ");
		Serial.println(WiFi.localIP());

		server.begin();
		Serial.println("TCP Server gestartet auf Port 1234");

		return true;
	}


	return false;
}

// ---------- SETUP ----------
void setup() {
	Serial.begin(115200);

	loadConfig();

	if (config.valid && connectSTA()) {
		Serial.println("STA Mode aktiv");
	} else {
		Serial.println();
		Serial.println();
		Serial.println("Starte Captive Portal");
		startAP();
	}
}

// ---------- LOOP ----------
void loop() {

	if (WiFi.getMode() == WIFI_AP) {
		dnsServer.processNextRequest();
		webServer.handleClient();
		return;
	}

	webServer.handleClient(); // optional auch im STA Mode

	WiFiClient client = server.available();

	if (!client) {
		return;
	}

	Serial.println("Client verbunden");
	client.println("Connected");

	while (client.connected()) {

		if (!client.available()) {
			delay(1);
			continue;
		}

		String msg = client.readStringUntil('\n');
		msg.trim();

		Serial.print("Empfangen: ");
		Serial.println(msg);

		client.println("ACK: " + msg);

		if (msg.equalsIgnoreCase("/ledOn")) {
			digitalWrite(ledPin, LOW);
		}

		if (msg.equalsIgnoreCase("/ledOff")) {
			digitalWrite(ledPin, HIGH);
		}

		if (msg.equalsIgnoreCase("quit")) {
			break;
		}
	}

	client.stop();
	Serial.println("Client getrennt");
}