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add translation for esp_mesh doc
This commit is contained in:
Natasha
Krzysztof Budzynski
parent
505a82488a
commit
0c444c06a7
@ -13,7 +13,7 @@ This is a programming guide for ESP-MESH, including the API reference and coding
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5. :ref:`mesh-api-reference`
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For documentation regarding the ESP-MESH protocol, please see the :doc:`ESP-MESH API Guide<../../api-guides/mesh>`.
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For documentation regarding the ESP-MESH protocol, please see the :doc:`ESP-MESH API Guide<../../api-guides/mesh>`. For more information about ESP-MESH Development Framework, please see `ESP-MESH Development Framework <https://github.com/espressif/esp-mdf>`_.
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.. ---------------------- ESP-MESH Programming Model --------------------------
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@ -51,7 +51,7 @@ An application interfaces with ESP-MESH via **ESP-MESH Events**. Since ESP-MESH
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ESP-MESH System Events Delivery
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The :cpp:type:`mesh_event_id_t` defines all possible ESP-MESH events and can indicate events such as the connection/disconnection of parent/child. Before ESP-MESH events can be used, the application must register a **Mesh Events handler** via :cpp:func:`esp_event_handler_register` to the default event task. Should contain handlers for each event relevant to the application.
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The :cpp:type:`mesh_event_id_t` defines all possible ESP-MESH events and can indicate events such as the connection/disconnection of parent/child. Before ESP-MESH events can be used, the application must register a **Mesh Events handler** via :cpp:func:`esp_event_handler_register` to the default event task. The Mesh Events handler that is registered contain handlers for each ESP-MESH event relevant to the application.
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Typical use cases of mesh events include using events such as :cpp:enumerator:`MESH_EVENT_PARENT_CONNECTED` and :cpp:enumerator:`MESH_EVENT_CHILD_CONNECTED` to indicate when a node can begin transmitting data upstream and downstream respectively. Likewise, :cpp:enumerator:`IP_EVENT_STA_GOT_IP` and :cpp:enumerator:`IP_EVENT_STA_LOST_IP` can be used to indicate when the root node can and cannot transmit data to the external IP network.
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@ -208,13 +208,13 @@ After starting ESP-MESH, the application should check for ESP-MESH events to det
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Self Organized Networking
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-------------------------
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Self organized networking is a feature of ESP-MESH where nodes can autonomously scan/select/connect/reconnect to other nodes and routers. This feature allows an ESP-MESH network to operate with high degree of autonomy by making the network robust to dynamic network topologies and conditions. With self organized networking enabled, nodes in an ESP-MESH network are able to carryout the following actions without autonomously:
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Self organized networking is a feature of ESP-MESH where nodes can autonomously scan/select/connect/reconnect to other nodes and routers. This feature allows an ESP-MESH network to operate with high degree of autonomy by making the network robust to dynamic network topologies and conditions. With self organized networking enabled, nodes in an ESP-MESH network are able to carry out the following actions without autonomously:
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- Selection or election of the root node (see **Automatic Root Node Selection** in :ref:`mesh-building-a-network`)
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- Selection of a preferred parent node (see **Parent Node Selection** in :ref:`mesh-building-a-network`)
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- Automatic reconnection upon detecting a disconnection (see **Intermediate Parent Node Failure** in :ref:`mesh-managing-a-network`)
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When self organized networking is enabled, the ESP-MESH stack will internally make calls to Wi-Fi driver APIs. Therefore, **the application layer should not make any calls to Wi-Fi driver APIs whilst self organized networking is enabled as doing so would risk interfering with ESP-MESH**.
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When self organized networking is enabled, the ESP-MESH stack will internally make calls to Wi-Fi APIs. Therefore, **the application layer should not make any calls to Wi-Fi APIs whilst self organized networking is enabled as doing so would risk interfering with ESP-MESH**.
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Toggling Self Organized Networking
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -275,12 +275,12 @@ The following code snipping demonstrates how to enable self organized networking
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esp_mesh_connect();
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Calling Wi-Fi Driver API
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^^^^^^^^^^^^^^^^^^^^^^^^
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Calling Wi-Fi API
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^^^^^^^^^^^^^^^^^
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There can be instances in which an application may want to directly call Wi-Fi driver API whilst using ESP-MESH. For example, an application may want to manually scan for neighboring APs. However, **self organized networking must be disabled before the application calls any Wi-Fi driver APIs**. This will prevent the ESP-MESH stack from attempting to call any Wi-Fi driver APIs and potentially interfering with the application's calls.
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There can be instances in which an application may want to directly call Wi-Fi API whilst using ESP-MESH. For example, an application may want to manually scan for neighboring APs. However, **self organized networking must be disabled before the application calls any Wi-Fi APIs**. This will prevent the ESP-MESH stack from attempting to call any Wi-Fi APIs and potentially interfering with the application's calls.
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Therefore, application calls to Wi-Fi driver APIs should be placed in between calls of :cpp:func:`esp_mesh_set_self_organized` which disable and enable self organized networking. The following code snippet demonstrates how an application can safely call :cpp:func:`esp_wifi_scan_start` whilst using ESP-MESH.
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Therefore, application calls to Wi-Fi APIs should be placed in between calls of :cpp:func:`esp_mesh_set_self_organized` which disable and enable self organized networking. The following code snippet demonstrates how an application can safely call :cpp:func:`esp_wifi_scan_start` whilst using ESP-MESH.
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.. code-block:: c
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@ -320,7 +320,7 @@ Application Examples
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ESP-IDF contains these ESP-MESH example projects:
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:example:`The Internal Communication Example<mesh/internal_communication>` demonstrates how to setup a ESP-MESH network and have the root node send a data packet to every node within the network.
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:example:`The Internal Communication Example<mesh/internal_communication>` demonstrates how to set up a ESP-MESH network and have the root node send a data packet to every node within the network.
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:example:`The Manual Networking Example<mesh/manual_networking>` demonstrates how to use ESP-MESH without the self-organizing features. This example shows how to program a node to manually scan for a list of potential parent nodes and select a parent node based on custom criteria.
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@ -1 +1,336 @@
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.. include:: ../../../en/api-reference/network/esp_mesh.rst
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ESP-MESH 编程指南
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==========================
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:link_to_translation:`en:[English]`
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这是 ESP-MESH 的编程指南，包括 API 参考和编码示例。本指南分为以下部分：
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1. :ref:`mesh-programming-model`
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2. :ref:`mesh-writing-mesh-application`
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3. :ref:`mesh-self-organized-behavior`
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4. :ref:`mesh-application-examples`
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5. :ref:`mesh-api-reference`
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有关 ESP-MESH 协议的文档，请见 :doc:`ESP-MESH API 指南 <../../api-guides/mesh>`。有关 ESP-MESH 开发框架的更多内容，请见 `ESP-MESH 开发框架 <https://github.com/espressif/esp-mdf>`_。
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.. ----------------------ESP-MESH 编程模型 --------------------------
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.. _mesh-programming-model:
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ESP-MESH 编程模型
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--------------------------
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软件栈
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^^^^^^^^^^^^^^
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ESP-MESH 软件栈基于 Wi-Fi 驱动程序和 FreeRTOS 构建，某些情况下（如根节点）也会使用 LwIP 软件栈。下图展示了 ESP-MESH 软件栈。
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.. _mesh-going-to-software-stack:
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.. figure:: ../../../_static/mesh-software-stack.png
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:align: center
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:alt: ESP-MESH 软件栈
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:figclass: align-center
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ESP-MESH 软件栈
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.. _mesh-events:
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系统事件
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^^^^^^^^^^^^^
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应用程序可通过 **ESP-MESH 事件** 与 ESP-MESH 交互。由于 ESP-MESH 构建在 Wi-Fi 软件栈之上，因此也可以通过 **Wi-Fi 事件任务** 与 Wi-Fi 驱动程序进行交互。下图展示了 ESP-MESH 应用程序中各种系统事件的接口。
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.. figure:: ../../../_static/mesh-events-delivery.png
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:align: center
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:alt: ESP-MESH 系统事件交付
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:figclass: align-center
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ESP-MESH 系统事件交付
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:cpp:type:`mesh_event_id_t` 定义了所有可能的 ESP-MESH 事件，并且可以指示父节点和子节点的连接或断开等事件。应用程序如需使用 ESP-MESH 事件，则必须通过 :cpp:func:`esp_event_handler_register` 将 **Mesh 事件处理程序** 注册在默认事件任务中。注册完成后，ESP-MESH 事件将包含与应用程序所有相关事件相关的处理程序。
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Mesh 事件的典型应用场景包括：使用 :cpp:enumerator:`MESH_EVENT_PARENT_CONNECTED` 和 :cpp:enumerator:`MESH_EVENT_CHILD_CONNECTED` 事件来指示节点何时可以分别开始传输上行和下行的数据。同样，也可以使用 :cpp:enumerator:`IP_EVENT_STA_GOT_IP` 和 :cpp:enumerator:`IP_EVENT_STA_LOST_IP` 事件来指示根节点何时可以向外部 IP 网络传输数据。
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.. warning::
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在自组网模式下使用 ESP-MESH 时，用户必须确保不得调用 Wi-Fi API。原因在于：自组网模式将在内部调用 Wi-Fi API 实现连接/断开/扫描等操作。 **此时，如果外部应用程序调用 Wi-Fi API（包括来自回调函数和 Wi-Fi 事件处理程序的调用）都可能会干扰 ESP-MESH 的自组网行为**。因此，用户不应该在 :cpp:func:`esp_mesh_start` 和 :cpp:func:`esp_mesh_stop` 之间调用 Wi-Fi API。
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LwIP & ESP-MESH
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^^^^^^^^^^^^^^^
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应用程序无需通过 LwIP 层便可直接访问 ESP-MESH 软件栈，LwIP 层仅在根节点和外部 IP 网络的数据发送与接收时会用到。但是，由于每个节点都有可能成为根节点（由于自动根节点选择机制的存在），每个节点仍必须初始化 LwIP 软件栈。
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**每个节点都需要通过调用** :cpp:func:`tcpip_adapter_init` **初始化 LwIP 软件栈**。 为了防止非根节点访问 LwIP，应用程序应该在 LwIP 初始化完成后停止以下服务：
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- SoftAP 接口上的 DHCP 服务器服务。
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- Station 接口上的 DHCP 客户端服务。
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下方代码片段展示如何为 ESP-MESH 应用程序进行 LwIP 初始化。
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.. code-block:: c
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/* tcpip 初始化 */
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tcpip_adapter_init();
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/*
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* 对于 MESH
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* 默认情况下，在 SoftAP 接口上停止 DHCP 服务器
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* 默认情况下，在 Station 接口上停止 DHCP 客户端
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*/
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ESP_ERROR_CHECK(tcpip_adapter_dhcps_stop(TCPIP_ADAPTER_IF_AP));
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ESP_ERROR_CHECK(tcpip_adapter_dhcpc_stop(TCPIP_ADAPTER_IF_STA));
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.. note::
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ESP-MESH 的根节点必须与路由器连接。因此，当一个节点成为根节点时，**该节点对应的处理程序必须启动 DHCP 客户端服务并立即获取 IP 地址。** 这样做将允许其他节点开始向/从外部 IP 网络发送/接收数据包。但是，如果使用静态 IP 设置，则不需要执行此步骤。
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.. ---------------------- Writing a Mesh Application --------------------------
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.. _mesh-writing-mesh-application:
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编写 ESP-MESH 应用程序
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-------------------------------
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ESP-MESH 在正常启动前必须先初始化 LwIP 和 Wi-Fi 软件栈。下方代码展示了 ESP-MESH 在开始自身初始化前必须完成的步骤。
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.. code-block:: c
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tcpip_adapter_init();
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/*
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* 对于 MESH
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* 默认情况下，在 SoftAP 接口上停止 DHCP 服务器
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* 默认情况下，在 Station 接口上停止 DHCP 客户端
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*/
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ESP_ERROR_CHECK(tcpip_adapter_dhcps_stop(TCPIP_ADAPTER_IF_AP));
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ESP_ERROR_CHECK(tcpip_adapter_dhcpc_stop(TCPIP_ADAPTER_IF_STA));
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/*事件初始化*/
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ESP_ERROR_CHECK(esp_event_loop_create_default());
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/*Wi-Fi 初始化 */
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wifi_init_config_t config = WIFI_INIT_CONFIG_DEFAULT();
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ESP_ERROR_CHECK(esp_wifi_init(&config));
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/*注册 IP 事件处理程序 */
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ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &ip_event_handler, NULL));
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ESP_ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_FLASH));
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ESP_ERROR_CHECK(esp_wifi_start());
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在完成 LwIP 和 Wi-Fi 的初始化后，需完成以下三个步骤以启动并运行 ESP-MESH。
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1. :ref:`mesh-initialize-mesh`
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2. :ref:`mesh-configuring-mesh`
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3. :ref:`mesh-start-mesh`
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.. _mesh-initialize-mesh:
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初始化 Mesh
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^^^^^^^^^^^^^^^
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下方代码片段展示如何初始化 ESP-MESH。
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.. code-block:: c
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/*Mesh 初始化 */
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ESP_ERROR_CHECK(esp_mesh_init());
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/*注册 mesh 事件处理程序 */
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ESP_ERROR_CHECK(esp_event_handler_register(MESH_EVENT, ESP_EVENT_ANY_ID, &mesh_event_handler, NULL));
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.. _mesh-configuring-mesh:
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配置 ESP-MESH 网络
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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.. todo - Add note about unified configuration
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ESP-MESH 可通过 :cpp:func:`esp_mesh_set_config` 进行配置，并使用 :cpp:type:`mesh_cfg_t` 结构体传递参数。该结构体包含以下 ESP-MESH 的配置参数：
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+------------------------------+----------------------------------------------------------+
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| 参数 | 描述 |
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+------------------------------+----------------------------------------------------------+
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| Channel（信道） | 1 到 14 信道 |
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+------------------------------+----------------------------------------------------------+
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| Mesh ID | ESP-MESH 网络的 ID，见 :cpp:type:`mesh_addr_t`。 |
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+------------------------------+----------------------------------------------------------+
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| Router（路由器） | 路由器配置，见 :cpp:type:`mesh_router_t`。 |
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+------------------------------+----------------------------------------------------------+
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| Mesh AP | Mesh AP 配置，见 :cpp:type:`mesh_ap_cfg_t` |
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+------------------------------+----------------------------------------------------------+
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| Crypto Functions（加密函数） | Mesh IE 的加密函数，见 :cpp:type:`mesh_crypto_funcs_t`。 |
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+------------------------------+----------------------------------------------------------+
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下方代码片段展示如何配置 ESP-MESH。
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.. code-block:: c
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/* 默认启用 MESH IE 加密 */
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mesh_cfg_t cfg = MESH_INIT_CONFIG_DEFAULT();
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/* Mesh ID */
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memcpy((uint8_t *) &cfg.mesh_id, MESH_ID, 6);
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/* 信道（需与路由器信道匹配）*/
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cfg.channel = CONFIG_MESH_CHANNEL;
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/* 路由器 */
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cfg.router.ssid_len = strlen(CONFIG_MESH_ROUTER_SSID);
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memcpy((uint8_t *) &cfg.router.ssid, CONFIG_MESH_ROUTER_SSID, cfg.router.ssid_len);
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memcpy((uint8_t *) &cfg.router.password, CONFIG_MESH_ROUTER_PASSWD,
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strlen(CONFIG_MESH_ROUTER_PASSWD));
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/* Mesh softAP */
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cfg.mesh_ap.max_connection = CONFIG_MESH_AP_CONNECTIONS;
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memcpy((uint8_t *) &cfg.mesh_ap.password, CONFIG_MESH_AP_PASSWD,
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strlen(CONFIG_MESH_AP_PASSWD));
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ESP_ERROR_CHECK(esp_mesh_set_config(&cfg));
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.. _mesh-start-mesh:
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启动 Mesh
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^^^^^^^^^^
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下方代码片段展示如何启动 ESP-MESH。
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.. code-block:: c
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/* 启动 Mesh */
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ESP_ERROR_CHECK(esp_mesh_start());
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启动 ESP-MESH 后，应用程序应检查 ESP-MESH 事件，以确定它是何时连接到网络的。连接后，应用程序可使用 :cpp:func:`esp_mesh_send` 和 :cpp:func:`esp_mesh_recv` 在 ESP-MESH 网络中发送、接收数据包。
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.. --------------------- ESP-MESH 应用程序示例 ------------------------
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.. _mesh-self-organized-behavior:
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自组网
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-------------------------
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自组网是 ESP-MESH 的功能之一，允许节点自动扫描/选择/连接/重新连接到其他节点和路由器。此功能允许 ESP-MESH 网络具有很高的自主性，可适应变化的动态网络拓扑结构和环境。启用自组网功能后，ESP-MESH 网络中的节点能够自主完成以下操作：
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- 选择或选举根节点（见 :ref:`mesh-building-a-network` 中的 **自动根节点选择**）
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- 选择首选的父节点（见 :ref:`mesh-building-a-network` 中的 **父节点选择**）
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- 网络断开时自动重新连接（见 :ref:`mesh-managing-a-network` 中的 **中间父节点失败**）
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启用自组网功能后，ESP-MESH 软件栈将内部调用 Wi-Fi API。因此，**在启用自组网功能时，应用层不得调用 Wi-Fi API，否则会干扰 ESP-MESH 的工作。**
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开关自组网
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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应用程序可以在运行时通过调用 :cpp:func:`esp_mesh_set_self_organized` 函数，启用或禁用自组网功能。该函数具有以下两个参数：
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- ``bool enable`` 指定启用或禁用自组网功能。
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- ``bool select_parent`` 指定在启用自组网功能时是否应选择新的父节点。根据节点类型和节点当前状态，选择新的父节点具有不同的作用。在禁用自组网功能时，此参数不使用。
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禁用自组网
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"""""""""""""""""""""""""""""""""""
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下方代码片段展示了如何禁用自组网功能。
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.. code-block:: c
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//禁用自组网
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esp_mesh_set_self_organized(false, false);
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ESP-MESH 将在禁用自组网时尝试维护节点的当前 Wi-Fi 状态。
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- 如果节点先前已连接到其他节点，则将保持连接。
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- 如果节点先前已断开连接并且正在扫描父节点或路由器，则将停止扫描。
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- 如果节点以前尝试重新连接到父节点或路由器，则将停止重新连接。
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启用自组网
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""""""""""""""""""""""""""""""""""
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ESP-MESH 将尝试在启用自组网时保持节点的当前 Wi-Fi 状态。但是，根据节点类型以及是否选择了新的父节点，节点的 Wi-Fi 状态可能会发生变化。下表显示了启用自组网的效果。
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+----------------+--------------+------------------------------------------------------------------------------------------------------------------------+
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| 是否选择父节点 | 是否为根结点 | 作用 |
|
||||
+----------------+--------------+------------------------------------------------------------------------------------------------------------------------+
|
||||
| N | N | 已连接到父节点的节点将保持连接。 |
|
||||
| | +------------------------------------------------------------------------------------------------------------------------+
|
||||
| | | 之前扫描父节点的节点将停止扫描。调用 :cpp:func:`esp_mesh_connect` 重新启动。 |
|
||||
| +--------------+------------------------------------------------------------------------------------------------------------------------+
|
||||
| | Y | 已连接到路由器的根节点将保持连接。 |
|
||||
| | +------------------------------------------------------------------------------------------------------------------------+
|
||||
| | | 从路由器断开的根结点需调用 :cpp:func:`esp_mesh_connect` 进行重连。 |
|
||||
+----------------+--------------+------------------------------------------------------------------------------------------------------------------------+
|
||||
| Y | N | 没有父节点的节点将自动选择首选父节点并连接。 |
|
||||
| | +------------------------------------------------------------------------------------------------------------------------+
|
||||
| | | 已连接到父节点的节点将断开连接，重新选择首选父节点并进行重连。 |
|
||||
| +--------------+------------------------------------------------------------------------------------------------------------------------+
|
||||
| | Y | 根结点在连接至父节点前必须放弃“根结点”的角色。因此，根节点将断开与路由器和所有子节点的连接，选择首选父节点并进行连接。 |
|
||||
+----------------+--------------+------------------------------------------------------------------------------------------------------------------------+
|
||||
|
||||
下方代码片段展示了如何启用自组网功能。
|
||||
|
||||
.. code-block:: c
|
||||
|
||||
//启用自组网，并选择一个新的父节点
|
||||
esp_mesh_set_self_organized(true, true);
|
||||
|
||||
...
|
||||
|
||||
//启用自组网并手动重新连接
|
||||
esp_mesh_set_self_organized(true, false);
|
||||
esp_mesh_connect();
|
||||
|
||||
|
||||
调用 Wi-Fi API
|
||||
^^^^^^^^^^^^^^^^
|
||||
|
||||
在有些情况下，应用程序可能希望在使用 ESP-MESH 期间调用 Wi-Fi API。例如，应用程序可能需要手动扫描邻近的接入点 (AP)。**但在应用程序调用任何 Wi-Fi API 之前，必须先禁用自组网。** 否则，ESP-MESH 软件栈可能会同时调用 Wi-Fi API，进而影响应用程序的正常调用。
|
||||
|
||||
应用程序不应在 :cpp:func:`esp_mesh_set_self_organized` 之间调用 Wi-Fi API。下方代码片段展示了应用程序如何在 ESP-MESH 运行期间安全地调用 :cpp:func:`esp_wifi_scan_start`。
|
||||
|
||||
.. code-block:: c
|
||||
|
||||
//禁用自组网
|
||||
esp_mesh_set_self_organized(0, 0);
|
||||
|
||||
//停止任何正在进行的扫描
|
||||
esp_wifi_scan_stop();
|
||||
//手动启动扫描运行完成时自动停止
|
||||
esp_wifi_scan_start();
|
||||
|
||||
//进程扫描结果
|
||||
|
||||
...
|
||||
|
||||
//如果仍为连接状态，则重新启用自组网
|
||||
esp_mesh_set_self_organized(1, 0);
|
||||
|
||||
...
|
||||
|
||||
//如果不为根节点且未连接，则重新启用自组网
|
||||
esp_mesh_set_self_organized(1, 1);
|
||||
|
||||
...
|
||||
|
||||
//如果为根节点且未连接，则重新启用
|
||||
esp_mesh_set_self_organized(1, 0); //不选择新的父节点
|
||||
esp_mesh_connect(); //手动重新连接到路由器
|
||||
|
||||
|
||||
.. --------------------- ESP-MESH 应用程序示例 ------------------------
|
||||
|
||||
.. _mesh-application-examples:
|
||||
|
||||
应用实例
|
||||
--------------------
|
||||
|
||||
ESP-IDF 包含以下 ESP-MESH 示例项目：
|
||||
|
||||
:example:`内部通信示例 <mesh/internal_communication>` 展示了如何搭建 ESP-MESH 网络，并让根节点向网络中的每个节点发送数据包。
|
||||
|
||||
:example:`手动连网示例 <mesh/manual_networking>` 展示了如何在禁用自组网功能的情况下使用 ESP-MESH。此示例展示了如何对节点进行编程，以手动扫描潜在父节点的列表，并根据自定义标准选择父节点。
|
||||
|
||||
|
||||
.. -------------------------ESP-MESH API 参考 ---------------------------
|
||||
|
||||
.. _mesh-api-reference:
|
||||
|
||||
API 参考
|
||||
--------------
|
||||
|
||||
.. include:: /_build/inc/esp_mesh.inc
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user