wlan-phpto-R-ESP8266-12E-fiebi

/*
    This sketch demonstrates how to set up a simple HTTP-like server.
    The server will set a GPIO pin depending on the request
      http://server_ip/gpio/0 will set the GPIO2 low,
      http://server_ip/gpio/1 will set the GPIO2 high
    server_ip is the IP address of the ESP8266 module, will be
    printed to Serial when the module is connected.
*/

#include <ESP8266WiFi.h>

#ifndef STASSID
#define STASSID "WLAN-SSID"
#define STAPSK  "WLAN-Passwort"
#endif

const char* ssid = STASSID;
const char* password = STAPSK;

// Hier die MAC Adresse eingeben
// funktioniert nicht - die Änderung der MAC
// byte mac[] = {
//  0xA4, 0xCF, 0x12, 0xF1, 0xEB, 0x16 };

// Eine IP im lokalen Netzwerk angeben. Dazu am besten die IP
// des PCs herausfinden (googlen!) und die letzte Zahl abändern
// IP einstellen funktioniert auch nicht
// IPAddress ip(192,168,50,16);


// Create an instance of the server
// specify the port to listen on as an argument
WiFiServer server(80);

void setup() {
  Serial.begin(115200);

  // prepare LED
  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, 0);

  // Connect to WiFi network
  Serial.println();
  Serial.println();
  Serial.print(F("Connecting to "));
  Serial.println(ssid);

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(F("."));
  }
  Serial.println();
  Serial.println(F("WiFi connected"));

  // Start the server
  server.begin();
  Serial.println(F("Server started"));

  // Print the IP address
  Serial.println(WiFi.localIP());
}

void loop() {
  // Check if a client has connected
  WiFiClient client = server.available();
  if (!client) {
    return;
  }
  Serial.println(F("new client"));

  client.setTimeout(5000); // default is 1000

  // Read the first line of the request
  String req = client.readStringUntil('\r');
  Serial.println(F("request: "));
  Serial.println(req);

  // Match the request
  // 0 -> ein und 1-> aus komisch, ist aber so
  int val;
  if (req.indexOf(F("/gpio/0")) != -1) {
    val = 0;
  } else if (req.indexOf(F("/gpio/1")) != -1) {
    val = 1;
  } else {
    Serial.println(F("invalid request"));
    val = digitalRead(LED_BUILTIN);
  }

  // Set LED according to the request
  digitalWrite(LED_BUILTIN, val);

  // read/ignore the rest of the request
  // do not client.flush(): it is for output only, see below
  while (client.available()) {
    // byte by byte is not very efficient
    client.read();
  }

  // Send the response to the client
  // it is OK for multiple small client.print/write,
  // because nagle algorithm will group them into one single packet
 client.println("HTTP/1.1 200 OK");
 client.println("Content-Type: text/html");
 client.println("Connection: close"); // Verbindung wird nach Antwort beendet
 client.println("Refresh: 2"); // Seite alle 2 Sekunden neu abfragen
 client.println();
 // Ab hier berginnt der HTML-Code, der an den Browser geschickt wird
 client.println("<!DOCTYPE HTML>");
 client.println("<html>");
 client.print("<HEAD><TITLE>");
 client.print("NodeMCU Fiebi Board");
 client.println("</TITLE>");
 client.println("</HEAD><BODY>");
 client.println("<b>Hallo Welt!</b><br> /<br />");
 client.print("Node MCU V3 ESP8266WiFi l&auml;uft seit: ");
 // Gibt es noch was anderes? - sonst Tage Stunden Minuten Sekunden ... ausrechnen lassen :-)
 client.print(millis()/1000);
 client.println(" s.<br /><br />");
 client.print("Photowiderstand an Analogpin 0 zeigt: <b>");
 // liest analog-Port A0 und schreibt es in die HTML-Seite
 client.print(analogRead(A0));
 Serial.print("Wert des Analog-Ports 0: ");
 // liest analog-Port A0 und schreibt es in die Serielle Console
 Serial.println(analogRead(A0));
 client.println("</b><br />");
  client.print(F("<br>WLAN-LED ist zur Zeit  <b>"));
  // 0 -> ein und 1-> aus komisch, ist aber so
  client.print((val) ? F("aus") : F("an"));
  client.print(F("</b><br><br>Klick <a href='http://"));
  client.print(WiFi.localIP());
  // 0 -> ein und 1-> aus komisch, ist aber so
  client.print(F("/gpio/0'>hier</a>, um den LED GPIO einzuschalten, oder <a href='http://"));
  client.print(WiFi.localIP());
  client.print(F("/gpio/1'>hier</a>, um den LED GPIO auszuschalten.</body></html>"));

  // The client will actually be *flushed* then disconnected
  // when the function returns and 'client' object is destroyed (out-of-scope)
  // flush = ensure written data are received by the other side
  Serial.println(F("Disconnecting from client"));
}