#include <ESP8266WiFi.h>
#include <PubSubClient.h>

int ledPin = D5; //digitaler PIN 5 des Wemos D1 an welchem die LED angeschlossen ist.
int ledStatus = LOW; //aktueller Status der LED (default / start  -> AUS)


// Update these with values suitable for your network.
const char* ssid = "ssid";
const char* password = "kennwort";
const char* mqtt_server = "mqtthost";

WiFiClient espClient;
PubSubClient client(espClient);
long lastMsg = 0;
char msg[50];
int value = 0;
char power;


void setup() {
  pinMode(ledPin, OUTPUT);     // Adafruit Capacitive Touch Toggle Switch to D1
  digitalWrite(ledPin, LOW);

  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

void setup_wifi() {

  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

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

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");
  for (int i = 0; i < length; i++) {
    Serial.print((char)payload[i]);
    char power  = (char)payload[i];
    if(power == '1') {
      digitalWrite(ledPin, HIGH);
    } else {
      digitalWrite(ledPin, LOW);
    }

  }
}


void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Attempt to connect
    if (client.connect("ESP8266Client")) {
      Serial.println("connected");
      client.subscribe("cmnd/Nachtlicht/POWER");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

void loop() {

  if (!client.connected()) {
    reconnect();
  }

  int value = 0;
  client.loop();

}