text: /*
   * Copyright 2021-2022 AVSystem <avsystem@avsystem.com>
   *
   * 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.
   */
  
  #include "utils.h"
  
  #include <string.h>
  
  #include "esp_system.h"
  
  #include <avsystem/commons/avs_utils.h>
  
  int get_device_id(device_id_t *out_id) {
      memset(out_id->value, 0, sizeof(out_id->value));
  
      uint8_t mac[6];
      if (esp_efuse_mac_get_default(mac) != ESP_OK) {
          return -1;
      }
  
      return avs_hexlify(out_id->value, sizeof(out_id->value), NULL, mac,
                         sizeof(mac));
  }
  