ESP8266 Wemos D1 mini, DHT22 and Google nest mini

#include <ESP8266WiFi.h>
#include <NTPClient.h>
#include <esp8266-google-home-notifier.h>
#include "DHT.h"

#define DHTPIN 2
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);
int STARTHOUR = 9;                              //write here the time when the notifications start
int ENDHOUR = 21;                               //write here the time to stop notifications
const char* ssid     = "YOUR WIFI SSID";        //enter here your wifi SSID name
const char* password = "*YOUR WIFI PASSWORD";   //enter here your wifi PASSWORD
String Notificare ="";

unsigned long previous_time = 0;
unsigned long pauza = 20000;  // 20 seconds delay

GoogleHomeNotifier ghn;

const long utcOffsetInSeconds = 10800;           //Edit here to get the right time for your area, delay is in seconds ! This value is valable for Romania CET

WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org", utcOffsetInSeconds);

String daysOfTheWeek[7]={"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
String months[12]={"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};

void initWiFi() {
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WIFI network");
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print('.');
    delay(1000);
  }
  Serial.println("connected.");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
}

void setup()
     {
       Serial.begin(115200);
       Serial.println("");
       initWiFi();
       const char displayName[] = "Entryway speaker";   //Enter the name of your google home speaker here

       Serial.println("connecting to Google Home...");
       if (ghn.device(displayName, "en") != true)
          {
             Serial.println(ghn.getLastError());
             return;
          }
       Serial.print("found Google Home(");
       Serial.print(ghn.getIPAddress());
       Serial.print(":");
       Serial.print(ghn.getPort());
       Serial.println(")");
       dht.begin();

       if (ghn.notify("Hi, My name is D1 Mini, and I will tell you, via google home, the exact time, temperature, and humidity, measured in your room.") != true)
          {
             Serial.println(ghn.getLastError());
             return;
          }
       Serial.println("Done.");
       delay(10000);
       if (ghn.notify("I will send notifications, to your google nest speaker, every 15 minutes, between the hours, set at the beginning of this code.") != true)
          {
             Serial.println(ghn.getLastError());
             return;
          }
       Serial.println("Done.");
       timeClient.update();
       delay(10000);
     }

void loop()
     {
        unsigned long current_time = millis();
         if ((WiFi.status() != WL_CONNECTED) && (current_time - previous_time >= pauza))
            {
              Serial.print(millis());
              Serial.println("Reconnecting to WIFI network");
              WiFi.disconnect();
              WiFi.reconnect();
              previous_time = current_time;
            }


        if (timeClient.getHours() > STARTHOUR)
           {
              if (timeClient.getHours() < ENDHOUR)
                 {
                     if (timeClient.getMinutes() == 0)
                        {
                          VorbesteGoogle();
                          delay(120000);
                        }
                     if (timeClient.getMinutes() == 15)
                        {
                          VorbesteGoogle();
                          delay(120000);
                        }
                     if (timeClient.getMinutes() == 30)
                        {
                          VorbesteGoogle();
                          delay(120000);
                        }
                      if (timeClient.getMinutes() == 45)
                        {
                          VorbesteGoogle();
                          delay(120000);
                        }
                 }
           }
     }

void VorbesteGoogle()
     {
        timeClient.update();
        unsigned long epochTime = timeClient.getEpochTime();
        struct tm *ptm = gmtime ((time_t *)&epochTime);
        int monthDay = ptm->tm_mday;
        int currentMonth = ptm->tm_mon+1;
        int currentYear = ptm->tm_year+1900;
        String currentMonthName = months[currentMonth-1];

        float h = dht.readHumidity();
        float t = dht.readTemperature();
        float f = dht.readTemperature(true);

       if (isnan(h) || isnan(t) || isnan(f))
          {
             Serial.println(F("Failed to read from DHT sensor!"));
             return;
          }

        Notificare = Notificare +"It's, ";
        Notificare = Notificare +daysOfTheWeek[timeClient.getDay()];
        Notificare = Notificare +", ";
        Notificare = Notificare +monthDay;
        Notificare = Notificare +currentMonthName;
        Notificare = Notificare +", ";
        Notificare = Notificare +currentYear;
        Notificare = Notificare +",The time is, ";
        Notificare = Notificare + timeClient.getHours();
        Notificare = Notificare +",and ";
        Notificare = Notificare + timeClient.getMinutes();
        Notificare = Notificare +"minutes, ";
        Notificare = Notificare +"The temperature is, ";
        Notificare = Notificare + String(t,1);
        Notificare = Notificare + "degrees celsius,";
        Notificare = Notificare + "the relative Humidity is,";
        Notificare = Notificare + String(h,1);
        Notificare = Notificare + "percent.";

        if (ghn.notify (Notificare.c_str()) != true)
           {
              Serial.println(ghn.getLastError());
              return;
           }
        Notificare = "";
     }