text: #ifndef AppConfig_h
  #define AppConfig_h
  
  #include <stdint.h>
  #include <FS.h>
  #include <ArduinoJson.h>
  #include <Log4Esp.h>
  
  class DeviceConfig {
  private:
      const String filename = "/config.json";
  
      // Name max lenght: 50 (according to azure)
      char azIoTHubName[51];
  
      // Unknown max lenght, taking 256
      char azIoTSASToken[257]; 
  
      char deviceId[33];
  
      char postMessageUrl[257];
  
      log4Esp::Logger logger = log4Esp::Logger("DeviceConfig");
  public:
      bool load();
      bool update(String& content);
  
      String getAzIoTHubName();
      String getAzIoTSASToken();
      String getDeviceId();
      String getPostMessageUrl();
  };
  
  #endif