ESP8266 als Wasserwarner mit Sprachausgabe per Alexa

//Datenbereitstellung ueber MQTT mit NodeMCU ESP8266
// Verwendung MH-RD Digital Output, NodeMCU
// Liest Wert Wassersensor und sendet an MQTT Broker
// prilchen.de
#include <ESP8266WiFi.h>
#include <PubSubClient.h>

#define wassersensor 2
const char* ssid = "WLAN-AP";
const char* password = "Test";
const char* mqtt_server = "10.10.20.20";
#define userName "mqttuser"
#define passmptt "Test"

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

void setup_wifi() {

  delay(10);
  // We start by connecting to a WiFi network
  Serial.begin(115200);
  Serial.println();
  Serial.print("Verbindung zu ");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA); //Arbeite nur als Station und nicht als AccessPoint
  WiFi.begin(ssid, password);

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

  randomSeed(micros());

  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("Nachricht angekommen [");
  Serial.print(topic);
  Serial.print("] ");
  for (int i = 0; i < length; i++) {
    Serial.print((char)payload[i]);
  }
  Serial.println();
}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Create a random client ID
    String clientId = "ESP8266wasseralarm";
    clientId += String(random(0xffff), HEX);
    // Attempt to connect
    //if you MQTT broker has clientID,username and password
    //please change following line to    if (client.connect(clientId,userName,passWord))
    if (client.connect("ESP8266wasseralarm", "mqttuser", "Test")) {
      Serial.println("connected");
      // Once connected, publish an announcement...
      //client.publish("outTopic", "hello world");
      // ... and resubscribe
      //client.subscribe("outtemp"); aboniere folgendes Thema
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

void setup() {
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  Serial.println(F("Wasseralarm startet..."));

}

void loop() {

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

  long now = millis();
  // lese Wassersensor sensor every 10 seconds
  if (now - lastMsg > 10000) {
    lastMsg = now;


    String msg = "1";
    char MsgAlarm[25];
    int zustand = digitalRead(wassersensor);
    Serial.print("Digital Output: ");
    Serial.print(zustand);
    if (zustand == 1) {
      Serial.println("   Status: trocken");
      msg = "false";
      msg.toCharArray(MsgAlarm, 25);
    } else {
      Serial.println("   Status: nass");
      msg = "true";
      msg.toCharArray(MsgAlarm, 25);
    }

    client.publish("WasserimKeller", MsgAlarm);

  }
}