Add license headers, update namespaces

esp_modem/include/cxx_include/esp_modem_command_library.hpp

@@ -1,9 +1,19 @@
+// Copyright 2021 Espressif Systems (Shanghai) PTE LTD
 //
-// Created by david on 3/2/21.
-//
+// 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
 
-#ifndef SIMPLE_CXX_CLIENT_ESP_MODEM_COMMAND_LIBRARY_HPP
-#define SIMPLE_CXX_CLIENT_ESP_MODEM_COMMAND_LIBRARY_HPP
+//     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 _ESP_MODEM_COMMAND_LIBRARY_HPP_
+#define _ESP_MODEM_COMMAND_LIBRARY_HPP_
 
 #include "esp_modem_dte.hpp"
 #include "esp_modem_dce_module.hpp"
@@ -13,6 +23,17 @@
 namespace esp_modem {
 namespace dce_commands {
 
+/**
+ * @defgroup ESP_MODEM_DCE_COMMAND ESP_MODEM DCE command library
+ * @brief Library of the most useful DCE commands
+ */
+/** @addtogroup ESP_MODEM_DCE_COMMAND
+ * @{
+ */
+
+/**
+ * @brief Declaration of all commands is generated from esp_modem_command_declare.inc
+ */
 #define ESP_MODEM_DECLARE_DCE_COMMAND(name, return_type, TEMPLATE_ARG, MUX_ARG, ...) \
         return_type name(CommandableIf *t, ## __VA_ARGS__);
 
@@ -20,8 +41,11 @@ namespace dce_commands {
 
 #undef ESP_MODEM_DECLARE_DCE_COMMAND
 
+/**
+ * @}
+ */
+
 } // dce_commands
 } // esp_modem
 
-
-#endif //SIMPLE_CXX_CLIENT_ESP_MODEM_COMMAND_LIBRARY_HPP
+#endif //_ESP_MODEM_COMMAND_LIBRARY_HPP_