Wi-Fi Easy ConnectTM (DPP)
Wi-Fi Easy ConnectTM 是 Wi-Fi Alliance 认证的配网协议，也称为设备配网协议 (DPP) 或 Easy Connect，是一种安全和标准化的 Wi-Fi 设备配网协议。使用 Easy Connect 将新设备添加入网就像扫描二维码一样简单，特别是对于没有 UI 的智能家居和物联网产品而言，大大降低了联网复杂性，加强了的用户体验。与旧的协议如 Wi-Fi Protected Setup (WPS) 等旧协议相比，Wi-Fi Easy Connect 的公钥加密技术额外确保了添加新设备时的网络安全。
Easy Connect 从以下几个方面改善了用户体验：
操作简单直观，设置新设备时无需阅读冗长的指南
无需记住需配网设备的密码或输入密码
支持电子/打印的二维码以及其他人类可读的字符串
同时支持 WPA2 和 WPA3 网络
如需了解更多信息，请参考 Wi-Fi Alliance 的官方介绍：Easy Connect。
ESP32-C3 支持 Easy Connect 的二维码配网模式，用户需要使用显示器显示二维码，随后使用兼容的设备扫描此二维码，并将 ESP32-C3 添加到自己的 Wi-Fi 网络中。此兼容设备需连接到无需支持 Wi-Fi Easy ConnectTM 的 AP 上。
Easy Connect 协议仍在不断发展。目前已知支持二维码的平台为部分运行 Android 10 及更高系统版本的 Android 智能手机等。使用 Easy Connect 时，无需在智能手机上安装额外的应用程序。
应用示例
wifi/wifi_easy_connect/dpp-enrollee 演示如何使用 DPP 将 ESP32-C3 配置为注册设备，通过二维码和 Android 10 及以上的设备安全地将 ESP 设备接入网络。
API 参考
Header File
This header file can be included with:
#include "esp_dpp.h"
This header file is a part of the API provided by the
wpa_supplicantcomponent. To declare that your component depends onwpa_supplicant, add the following to your CMakeLists.txt:REQUIRES wpa_supplicant
or
PRIV_REQUIRES wpa_supplicant
Functions
-
esp_err_t esp_supp_dpp_init(esp_supp_dpp_event_cb_t evt_cb)
Initialize DPP Supplicant.
Starts DPP Supplicant and initializes related Data Structures.
return
ESP_OK: Success
ESP_FAIL: Failure
- 参数
evt_cb -- Callback function to receive DPP related events
-
esp_err_t esp_supp_dpp_deinit(void)
De-initalize DPP Supplicant.
Frees memory from DPP Supplicant Data Structures.
- 返回
ESP_OK: Success
-
esp_err_t esp_supp_dpp_bootstrap_gen(const char *chan_list, esp_supp_dpp_bootstrap_t type, const char *key, const char *info)
Generates Bootstrap Information as an Enrollee.
Generates Out Of Band Bootstrap information as an Enrollee which can be used by a DPP Configurator to provision the Enrollee.
- 参数
chan_list -- List of channels device will be available on for listening
type -- Bootstrap method type, only QR Code method is supported for now.
key -- (Optional) 32 byte Raw Private Key for generating a Bootstrapping Public Key
info -- (Optional) Ancillary Device Information like Serial Number
- 返回
ESP_OK: Success
ESP_ERR_DPP_INVALID_LIST: Channel list not valid
ESP_FAIL: Failure
-
esp_err_t esp_supp_dpp_start_listen(void)
Start listening on Channels provided during esp_supp_dpp_bootstrap_gen.
Listens on every Channel from Channel List for a pre-defined wait time.
- 返回
ESP_OK: Success
ESP_FAIL: Generic Failure
ESP_ERR_INVALID_STATE: ROC attempted before WiFi is started
ESP_ERR_NO_MEM: Memory allocation failed while posting ROC request
Macros
-
ESP_DPP_AUTH_TIMEOUT_SECS
-
ESP_DPP_MAX_CHAN_COUNT
-
ESP_ERR_DPP_FAILURE
Generic failure during DPP Operation
-
ESP_ERR_DPP_TX_FAILURE
DPP Frame Tx failed OR not Acked
-
ESP_ERR_DPP_INVALID_ATTR
Encountered invalid DPP Attribute
-
ESP_ERR_DPP_AUTH_TIMEOUT
DPP Auth response was not received in time
-
ESP_ERR_DPP_INVALID_LIST
Channel list given in esp_supp_dpp_bootstrap_gen() is not valid or too big
Type Definitions
-
typedef enum dpp_bootstrap_type esp_supp_dpp_bootstrap_t
Types of Bootstrap Methods for DPP.
-
typedef void (*esp_supp_dpp_event_cb_t)(esp_supp_dpp_event_t evt, void *data)
Callback function for receiving DPP Events from Supplicant.
Callback function will be called with DPP related information.
- Param evt
DPP event ID
- Param data
Event data payload
Enumerations
-
enum dpp_bootstrap_type
Types of Bootstrap Methods for DPP.
Values:
-
enumerator DPP_BOOTSTRAP_QR_CODE
QR Code Method
-
enumerator DPP_BOOTSTRAP_PKEX
Proof of Knowledge Method
-
enumerator DPP_BOOTSTRAP_NFC_URI
NFC URI record Method
-
enumerator DPP_BOOTSTRAP_QR_CODE
-
enum esp_supp_dpp_event_t
Types of Callback Events received from DPP Supplicant.
Values:
-
enumerator ESP_SUPP_DPP_URI_READY
URI is ready through Bootstrapping
-
enumerator ESP_SUPP_DPP_CFG_RECVD
Config received via DPP Authentication
-
enumerator ESP_SUPP_DPP_PDR_RECVD
Peer Discovery Response is received
-
enumerator ESP_SUPP_DPP_FAIL
DPP Authentication failure
-
enumerator ESP_SUPP_DPP_URI_READY