Arduino loop of ESP8266 board that measure temperature, humidity and soilmoisture

GroundFloorClient.ino

void loop() 
{  
  if ( firstTime || (millis() - lastTime > SECONDS_BETWEEN_MEASUREMENTS*1000) ) 
  {
    firstTime = false;
    lastTime = millis();

    if (!mqttClient.connected()) 
    {
      connectToWiFiAndBroker();
    }

    mqttClient.loop();

    float h_indoor = dht_indoor.readHumidity();
    float t_indoor = dht_indoor.readTemperature();

    publishFloatValue(h_indoor,"Home/GroundFloor/Humidity");
    publishFloatValue(t_indoor,"Home/GroundFloor/Temperature");

    int moistureWarning = digitalRead(14);
    if (moistureWarning == 1)
    {
      mqttClient.publish("Home/GroundFloor/PlantStatus", "Please water the plant!");
    }
    else
    {
      mqttClient.publish("Home/GroundFloor/PlantStatus", "Plant is ok!");
    }
  }

}