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board_common_wifi.c
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/*
* SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <string.h>
#include "sdkconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include "esp_system.h"
#include "esp_mac.h"
#include "esp_wifi.h"
#include "esp_event.h"
#include "esp_log.h"
#include "nvs_flash.h"
#include "lwip/err.h"
#include "lwip/sys.h"
#include "lwip/ip.h"
#include "iot_board.h"
/* The component use WiFi configuration that you can set via 'menuconfig' */
#define BOARD_WIFI_SSID CONFIG_BOARD_WIFI_SSID
#define BOARD_WIFI_PASS CONFIG_BOARD_WIFI_PASSWORD
#define BOARD_MAXIMUM_RETRY CONFIG_BOARD_MAXIMUM_RETRY
#define BOARD_WIFI_AP_SSID CONFIG_BOARD_WIFI_AP_SSID
#define BOARD_WIFI_AP_PASS CONFIG_BOARD_WIFI_AP_PASSWORD
#define BOARD_MAX_STA_CONN CONFIG_BOARD_MAX_STA_CONN
#define BOARD_IP_ADDR CONFIG_BOARD_SERVER_IP
#define BOARD_WIFI_AP_CHANNEL CONFIG_BOARD_WIFI_AP_CHANNEL
static const char *TAG = "Board_Common_wifi";
static int s_retry_num = 0;
static void wifi_event_handler(void *arg, esp_event_base_t event_base,
int32_t event_id, void *event_data)
{
if (event_base != WIFI_EVENT) {
return;
}
switch (event_id) {
case WIFI_EVENT_AP_STACONNECTED: {
wifi_event_ap_staconnected_t *event = (wifi_event_ap_staconnected_t *) event_data;
ESP_LOGI(TAG, "station "MACSTR" join, AID=%d",
MAC2STR(event->mac), event->aid);
break;
}
case WIFI_EVENT_AP_STADISCONNECTED: {
wifi_event_ap_stadisconnected_t *event = (wifi_event_ap_stadisconnected_t *) event_data;
ESP_LOGI(TAG, "station "MACSTR" leave, AID=%d",
MAC2STR(event->mac), event->aid);
break;
}
case WIFI_EVENT_STA_START:
esp_wifi_connect();
break;
case WIFI_EVENT_STA_DISCONNECTED:
if (s_retry_num < BOARD_MAXIMUM_RETRY) {
esp_wifi_connect();
s_retry_num++;
ESP_LOGI(TAG, "retry to connect to the AP");
} else {
ESP_LOGI(TAG, "giveup retry");
}
ESP_LOGI(TAG, "connect to the AP fail");
break;
case IP_EVENT_STA_GOT_IP: {
ip_event_got_ip_t *event = (ip_event_got_ip_t *) event_data;
ESP_LOGI(TAG, "got ip:" IPSTR, IP2STR(&event->ip_info.ip));
s_retry_num = 0;
}
break;
default:
break;
}
}
static void wifi_init_softap(esp_netif_t *wifi_netif)
{
if (strcmp(BOARD_IP_ADDR, "192.168.4.1")) {
int a, b, c, d;
sscanf(BOARD_IP_ADDR, "%d.%d.%d.%d", &a, &b, &c, &d);
esp_netif_ip_info_t ip_info;
IP4_ADDR(&ip_info.ip, a, b, c, d);
IP4_ADDR(&ip_info.gw, a, b, c, d);
IP4_ADDR(&ip_info.netmask, 255, 255, 255, 0);
ESP_ERROR_CHECK(esp_netif_dhcps_stop(wifi_netif));
ESP_ERROR_CHECK(esp_netif_set_ip_info(wifi_netif, &ip_info));
ESP_ERROR_CHECK(esp_netif_dhcps_start(wifi_netif));
}
wifi_config_t wifi_config;
memset(&wifi_config, 0, sizeof(wifi_config_t));
snprintf((char *)wifi_config.ap.ssid, 32, "%s", BOARD_WIFI_AP_SSID);
wifi_config.ap.ssid_len = strlen((char *)wifi_config.ap.ssid);
snprintf((char *)wifi_config.ap.password, 64, "%s", BOARD_WIFI_AP_PASS);
wifi_config.ap.max_connection = BOARD_MAX_STA_CONN;
wifi_config.ap.authmode = WIFI_AUTH_WPA_WPA2_PSK;
wifi_config.ap.channel = BOARD_WIFI_AP_CHANNEL;
if (strlen(BOARD_WIFI_AP_PASS) == 0) {
wifi_config.ap.authmode = WIFI_AUTH_OPEN;
}
ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_AP, &wifi_config));
ESP_LOGI(TAG, "wifi_init_softap finished. SSID:%s password:%s channel:%d",
BOARD_WIFI_AP_SSID, BOARD_WIFI_AP_PASS, BOARD_WIFI_AP_CHANNEL);
}
static void wifi_init_sta(esp_netif_t *wifi_netif)
{
(void) wifi_netif;
wifi_config_t wifi_config;
memset(&wifi_config, 0, sizeof(wifi_config_t));
snprintf((char *)wifi_config.sta.ssid, 32, "%s", BOARD_WIFI_SSID);
snprintf((char *)wifi_config.sta.password, 64, "%s", BOARD_WIFI_PASS);
ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config));
ESP_LOGI(TAG, "wifi_init_sta finished.");
ESP_LOGI(TAG, "connect to ap SSID:%s password:%s",
BOARD_WIFI_SSID, BOARD_WIFI_PASS);
}
ATTR_WEAK esp_err_t iot_board_wifi_init()
{
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
wifi_mode_t mode = WIFI_MODE_NULL;
esp_netif_t *wifi_netif = NULL;
if (strlen(BOARD_WIFI_AP_SSID) && strlen(BOARD_WIFI_SSID)) {
mode = WIFI_MODE_APSTA;
} else if (strlen(BOARD_WIFI_AP_SSID)) {
mode = WIFI_MODE_AP;
} else if (strlen(BOARD_WIFI_SSID)) {
mode = WIFI_MODE_STA;
}
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);
if (mode == WIFI_MODE_NULL) {
ESP_LOGW(TAG, "Neither AP or STA have been configured. WiFi will be off.");
return ESP_ERR_NVS_INVALID_STATE;
}
ESP_ERROR_CHECK(esp_netif_init());
ESP_ERROR_CHECK(esp_event_loop_create_default());
ESP_ERROR_CHECK(esp_wifi_init(&cfg));
ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT,
ESP_EVENT_ANY_ID,
&wifi_event_handler,
NULL,
NULL));
ESP_ERROR_CHECK(esp_wifi_set_mode(mode));
if (mode & WIFI_MODE_AP) {
wifi_netif = esp_netif_create_default_wifi_ap();
wifi_init_softap(wifi_netif);
ESP_LOGI(TAG, "wifi ap initialized");
}
if (mode & WIFI_MODE_STA) {
wifi_netif = esp_netif_create_default_wifi_sta();
wifi_init_sta(wifi_netif);
ESP_LOGI(TAG, "wifi sta initialized");
}
ESP_ERROR_CHECK(esp_wifi_start());
ESP_ERROR_CHECK(esp_wifi_set_ps(WIFI_PS_NONE));
return ESP_OK;
}