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BUTTON-WEB-RELAY/BUTTON-WEB-RELAY.ino

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+#include <ESP8266WiFi.h>
+#include <ESP8266WebServer.h>
+#include <ESP8266mDNS.h>
+
+// --- Zugangsdaten ---
+const char* ssid = "Wayne Manor";
+const char* password = "einfach10zeichen!";
+const char* hostname = "licht";
+
+// --- Hardware ---
+const int relayPin = 2; // Pin, an dem das Relais hängt
+bool relayState = false;
+
+ESP8266WebServer server(80);
+
+// HTML Webseite
+String getHTML() {
+  String html = "<!DOCTYPE html><html><head><meta charset='UTF-8'>";
+  html += "<title>Licht Steuerung</title>";
+  html += "<style>body { font-family: sans-serif; text-align: center; padding-top: 50px; }";
+  html += ".button { padding: 20px 40px; font-size: 24px; cursor: pointer; border: none; border-radius: 5px; color: white; }";
+  html += ".on { background-color: #4CAF50; } .off { background-color: #4CAF50; }</style></head>";
+  html += "<body><h1>Licht Steuerung</h1>";
+  
+  if (relayState) {
+    html += "<a href='/toggle'><button class='button off'>schalten</button></a>";
+  } else {
+    html += "<a href='/toggle'><button class='button on'>schalten</button></a>";
+  }
+  
+  html += "</body></html>";
+  return html;
+}
+
+void handleRoot() {
+  server.send(200, "text/html", getHTML());
+}
+
+void handleToggle() {
+  relayState = !relayState;
+  digitalWrite(relayPin, relayState ? LOW : HIGH); // Relais sind oft Low-Level-Triggered
+  server.sendHeader("Location", "/");
+  server.send(303);
+}
+
+void setup() {
+  Serial.begin(9600);
+  pinMode(relayPin, OUTPUT);
+  digitalWrite(relayPin, HIGH); // Standardmäßig aus (bei High-Trigger umkehren)
+
+  WiFi.begin(ssid, password);
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+
+  // mDNS (Hostname) starten
+  if (MDNS.begin(hostname)) {
+    Serial.println("mDNS Responder gestartet");
+  }
+
+  server.on("/", handleRoot);
+  server.on("/toggle", handleToggle);
+  
+  server.begin();
+  Serial.print("Verbunden! IP-Adresse: ");
+  Serial.println(WiFi.localIP());
+  Serial.printf("Hostname: http://%s.local\n", hostname);
+}
+
+void loop() {
+  MDNS.update();
+  server.handleClient();
+}