text: // Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  #ifndef _MQTT_SUPPORTED_FEATURES_H_
  #define _MQTT_SUPPORTED_FEATURES_H_
  
  #if __has_include("esp_idf_version.h")
  #include "esp_idf_version.h"
  #endif
  
  /**
   * @brief This header defines supported features of IDF which mqtt module
   *        could use depending on specific version of ESP-IDF.
   *        In case "esp_idf_version.h" were not found, all additional
   *        features would be disabled
   */
  
  #ifdef ESP_IDF_VERSION
  
  #if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(3, 3, 0)
  // Features supported from 3.3
  #define MQTT_SUPPORTED_FEATURE_EVENT_LOOP
  #endif
  
  #if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 0, 0)
  // Features supported in 4.0
  #define MQTT_SUPPORTED_FEATURE_WS_SUBPROTOCOL
  #define MQTT_SUPPORTED_FEATURE_TRANSPORT_ERR_REPORTING
  #endif
  #endif
  
  
  #endif // _MQTT_SUPPORTED_FEATURES_H_