Completed AT command library

esp_modem/include/cxx_include/esp_modem_command_library.hpp

@@ -41,6 +41,14 @@ namespace dce_commands {
 
 #undef ESP_MODEM_DECLARE_DCE_COMMAND
 
+/**
+ * @brief Following commands that are different for some specific modules
+ */
+command_result get_battery_status_sim7xxx(CommandableIf* t, int& voltage, int &bcs, int &bcl);
+command_result power_down_sim7xxx(CommandableIf* t);
+command_result power_down_sim8xx(CommandableIf* t);
+command_result set_data_mode_sim8xx(CommandableIf* t);
+
 /**
  * @}
  */