text: /**
   * \defgroup        ESP_PORT Platform specific
   * \brief           Platform specific functions
   * \{
   *
   * Platform specific functions user must create or take care of.
   *
   * \}
   */
  
  /**
   * \defgroup        ESP_API API architecture
   * \brief           High level application architecture
   * \{
   *
   * \}
   */