text: // The MIT License (MIT)
  //
  // Copyright (c) 2016 THINGER LTD
  // Author: alvarolb@gmail.com (Alvaro Luis Bustamante)
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  // THE SOFTWARE.
  
  #ifndef THINGER_WIFI_H
  #define THINGER_WIFI_H
  
  #include "ThingerClient.h"
  
  class ThingerWifi : public ThingerClient {
  
  public:
      ThingerWifi(const char* user, const char* device, const char* device_credential) :
              ThingerClient(client_, user, device, device_credential)
      {}
  
      ~ThingerWifi(){
  
      }
  
  protected:
  
      virtual bool network_connected(){
          return WiFi.status() == WL_CONNECTED && !(WiFi.localIP() == INADDR_NONE);
      }
  
      virtual bool connect_network(){
          long wifi_timeout = millis();
          THINGER_DEBUG_VALUE("NETWORK", "Connecting to network ", wifi_ssid_);
          WiFi.begin((char*)wifi_ssid_, (char*) wifi_password_);
          while( WiFi.status() != WL_CONNECTED) {
              if(millis() - wifi_timeout > 30000) return false;
              #ifdef ESP8266
              yield();
              #endif
          }
          THINGER_DEBUG("NETWORK", "Connected to WiFi!");
          wifi_timeout = millis();
          THINGER_DEBUG("NETWORK", "Getting IP Address...");
          while (WiFi.localIP() == INADDR_NONE) {
              if(millis() - wifi_timeout > 30000) return false;
              #ifdef ESP8266
              yield();
              #endif
          }
          THINGER_DEBUG_VALUE("NETWORK", "Got IP Address: ", wifi_ssid_);
          return true;
      }
  
  public:
  
      void add_wifi(const char* ssid, const char* password)
      {
          wifi_ssid_ = ssid;
          wifi_password_ = password;
      }
  
  private:
  
      WiFiClient client_;
      const char* wifi_ssid_;
      const char* wifi_password_;
  };
  
  #endif