#include <stdio.h>
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/queue.h"
#include "freertos/event_groups.h"
#include "esp_system.h"
#include "esp_wifi.h"
#include "nvs_flash.h"
#include "esp_log.h"
#define EXAMPLE_ESP_WIFI_SSID "QQQQQQ"
#define EXAMPLE_ESP_WIFI_PASS "11223344"
static const char *TAG = "wifi station";
static void event_handler(void* arg, esp_event_base_t event_base,
int32_t event_id, void* event_data)
{
if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {//配置好了wifi的STA模式
esp_wifi_connect();//连接热点
} else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {//和路由器断开
esp_wifi_connect();//连接热点
ESP_LOGI(TAG,"connect to the AP fail");
} else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {//连接上路由器(获取到了分配的IP地址)
ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;
ESP_LOGI(TAG, "got ip:" IPSTR, IP2STR(&event->ip_info.ip));
}
}
void wifi_init_sta(void)
{
ESP_ERROR_CHECK(esp_netif_init());//初始化内部的lwip
ESP_ERROR_CHECK(esp_event_loop_create_default());//创建系统事件任务
esp_netif_create_default_wifi_sta();//创建有 TCP/IP 堆栈的默认网络接口实例绑定 station 或 AP。
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
ESP_ERROR_CHECK(esp_wifi_init(&cfg));//创建 Wi-Fi 驱动程序任务,并初始化 Wi-Fi 驱动程序。
esp_event_handler_instance_t instance_any_id;
esp_event_handler_instance_t instance_got_ip;
/*注册系统事件回调函数*/
ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT, //wifi状态改变事件
ESP_EVENT_ANY_ID,
&event_handler,
NULL,
&instance_any_id));
/*注册系统事件回调函数*/
ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT, //IP地址改变事件
IP_EVENT_STA_GOT_IP,
&event_handler,
NULL,
&instance_got_ip));
/*配置连接的热点参数*/
wifi_config_t wifi_config = {
.sta = {
.ssid = EXAMPLE_ESP_WIFI_SSID,
.password = EXAMPLE_ESP_WIFI_PASS,
.threshold.authmode = WIFI_AUTH_WPA2_PSK,//加密方式
/*配置pmf,当前最新加密技术*/
.pmf_cfg = {
.capable = true, //告诉热点这边有能力使用PMF进行加密通信(防止窃听密码)
.required = false //告诉热点这边不强制要求使用PMF进行加密通信(防止窃听密码)
},
},
};
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA) );//设置STA模式
ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config) );//配置STA参数
ESP_ERROR_CHECK(esp_wifi_start() );//启动
/* 取消注册事件回调 */
//ESP_ERROR_CHECK(esp_event_handler_instance_unregister(IP_EVENT, IP_EVENT_STA_GOT_IP, instance_got_ip));
//ESP_ERROR_CHECK(esp_event_handler_instance_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID, instance_any_id));
}
void app_main(void)
{
//初始化 NVS(配置WiFi的参数存储需要用到NVS)
esp_err_t ret = nvs_flash_init();
if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
ESP_ERROR_CHECK(nvs_flash_erase());
ret = nvs_flash_init();
}
ESP_ERROR_CHECK(ret);
ESP_LOGI(TAG, "ESP_WIFI_MODE_STA");
wifi_init_sta();
}