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#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
 
/*Put your SSID & Password*/
const char* ssid = "mySSID";  // Enter SSID here
const char* password = "myPassword";  //Enter Password here
 
ESP8266WebServer server(80);
 
uint8_t LEDrot = D0;  //GPIO-16 Rot LED1
bool LED1status = LOW;
 
uint8_t LEDblau = D3; //GPIO-0 Blau LED2
bool LED2status = LOW;
 
void setup() {
  Serial.begin(115200);
  delay(100);
  pinMode(LEDrot, OUTPUT);
  pinMode(LEDblau, OUTPUT);
 
  Serial.println("Connecting to ");
  Serial.println(ssid);
 
  //connect to your local wi-fi network
  WiFi.begin(ssid, password);
 
  //check wi-fi is connected to wi-fi network
  while (WiFi.status() != WL_CONNECTED) {
  delay(1000);
  Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected..!");
  Serial.print("Got IP: ");  Serial.println(WiFi.localIP());
 
  server.on("/", handle_OnConnect);
  server.on("/led1on", handle_led1on);
  server.on("/led1off", handle_led1off);
  server.on("/led2on", handle_led2on);
  server.on("/led2off", handle_led2off);
  server.onNotFound(handle_NotFound);
 
  server.begin();
  Serial.println("HTTP server started");
}
void loop() {
  server.handleClient();
  if(LED1status)
  {digitalWrite(LEDrot, HIGH);}
  else
  {digitalWrite(LEDrot, LOW);}
  
  if(LED2status)
  {digitalWrite(LEDblau, HIGH);}
  else
  {digitalWrite(LEDblau, LOW);}
}
 
void handle_OnConnect() {
  LED1status = LOW;
  LED2status = LOW;
  Serial.println("LED-Rot Status: OFF | LED-Blau Status: OFF");
  server.send(200, "text/html", SendHTML(LED1status,LED2status)); 
}
 
void handle_led1on() {
  LED1status = HIGH;
  Serial.println("LED-Rot Status: ON");
  server.send(200, "text/html", SendHTML(true,LED2status)); 
}
 
void handle_led1off() {
  LED1status = LOW;
  Serial.println("LED-Rot Status: OFF");
  server.send(200, "text/html", SendHTML(false,LED2status)); 
}
 
void handle_led2on() {
  LED2status = HIGH;
  Serial.println("LED-Blau Status: ON");
  server.send(200, "text/html", SendHTML(LED1status,true)); 
}
 
void handle_led2off() {
  LED2status = LOW;
  Serial.println("LED-Blau Status: OFF");
  server.send(200, "text/html", SendHTML(LED1status,false)); 
}
 
void handle_NotFound(){
  server.send(404, "text/plain", "Not found");
}
 
String SendHTML(uint8_t led1stat,uint8_t led2stat){
  String ptr = "<!DOCTYPE html> <html>\n";
  ptr +="<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0, user-scalable=no\">\n";
  ptr +="<title>LED Control</title>\n";
  ptr +="<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}\n";
  ptr +="body{margin-top: 50px;} h1 {color: #444444;margin: 50px auto 30px;} h3 {color: #444444;margin-bottom: 50px;}\n";
  ptr +=".button {display: block;width: 80px;background-color: #1abc9c;border: none;color: white;padding: 13px 30px;text-decoration: none;font-size: 25px;margin: 0px auto 35px;cursor: pointer;border-radius: 4px;}\n";
  ptr +=".button-on {background-color: #1abc9c;}\n";
  ptr +=".button-on:active {background-color: #16a085;}\n";
  ptr +=".button-off {background-color: #34495e;}\n";
  ptr +=".button-off:active {background-color: #2c3e50;}\n";
  ptr +="p {font-size: 14px;color: #888;margin-bottom: 10px;}\n";
  ptr +="</style>\n";
  ptr +="</head>\n";
  ptr +="<body>\n";
  ptr +="<h1>ESP8266 Web Server</h1>\n";
    ptr +="<h3>Station(STA) Mode</h3>\n";
  
   if(led1stat)
  {ptr +="<p>LED Rot Status: ON</p><a class=\"button button-off\" href=\"/led1off\">OFF</a>\n";}
  else
  {ptr +="<p>LED Rot Status: OFF</p><a class=\"button button-on\" href=\"/led1on\">ON</a>\n";}
 
  if(led2stat)
  {ptr +="<p>LED Blau Status: ON</p><a class=\"button button-off\" href=\"/led2off\">OFF</a>\n";}
  else
  {ptr +="<p>LED Blau Status: OFF</p><a class=\"button button-on\" href=\"/led2on\">ON</a>\n";}
 
  ptr +="</body>\n";
  ptr +="</html>\n";
  return ptr;
}