123 lines
3.6 KiB
C
123 lines
3.6 KiB
C
|
/* Scan Example
|
||
|
|
|
||
|
|
This example code is in the Public Domain (or CC0 licensed, at your option.)
|
||
|
|
|
||
|
|
Unless required by applicable law or agreed to in writing, this
|
||
|
|
software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
|
||
|
|
CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
this example shows how to use all channel scan or fast scan to connect
|
||
|
|
In the fast scan mode, scan will end after find matched AP, in this mode, you
|
||
|
|
can set the threshold of auth mode and signal, the filter will ignore the AP
|
||
|
|
whose auth mode and rssi below the threshold.
|
||
|
|
In the all channel scan, scan will end after scan all the channel, and will
|
||
|
|
the best AP to connect, you can sort by signal or auth mode, auth mode is follow
|
||
|
|
the rule WPA2>WPA>WEP.
|
||
|
|
*/
|
||
|
|
#include "freertos/FreeRTOS.h"
|
||
|
|
#include "freertos/event_groups.h"
|
||
|
|
#include "esp_wifi.h"
|
||
|
|
#include "esp_log.h"
|
||
|
|
#include "esp_event_loop.h"
|
||
|
|
#include "nvs_flash.h"
|
||
|
|
|
||
|
|
/*set the ssid and password via "make menuconfig"*/
|
||
|
|
#define DEFAULT_SSID CONFIG_WIFI_SSID
|
||
|
|
#define DEFAULT_PWD CONFIG_WIFI_PASSWORD
|
||
|
|
|
||
|
|
#if CONFIG_WIFI_ALL_CHANNEL_SCAN
|
||
|
|
#define DEFAULT_SCAN_METHOD WIFI_ALL_CHANNEL_SCAN
|
||
|
|
#elif CONFIG_WIFI_FAST_SCAN
|
||
|
|
#define DEFAULT_SCAN_METHOD WIFI_FAST_SCAN
|
||
|
|
#else
|
||
|
|
#define DEFAULT_SCAN_METHOD WIFI_FAST_SCAN
|
||
|
|
#endif /*CONFIG_SCAN_METHOD*/
|
||
|
|
|
||
|
|
#if CONFIG_WIFI_CONNECT_AP_BY_SIGNAL
|
||
|
|
#define DEFAULT_SORT_METHOD WIFI_CONNECT_AP_BY_SIGNAL
|
||
|
|
#elif CONFIG_WIFI_CONNECT_AP_BY_SECURITY
|
||
|
|
#define DEFAULT_SORT_METHOD WIFI_CONNECT_AP_BY_SECURITY
|
||
|
|
#else
|
||
|
|
#define DEFAULT_SORT_METHOD WIFI_CONNECT_AP_BY_SIGNAL
|
||
|
|
#endif /*CONFIG_SORT_METHOD*/
|
||
|
|
|
||
|
|
#if CONFIG_FAST_SCAN_THRESHOLD
|
||
|
|
#define DEFAULT_RSSI CONFIG_FAST_SCAN_MINIMUM_SIGNAL
|
||
|
|
#if CONFIG_EXAMPLE_OPEN
|
||
|
|
#define DEFAULT_AUTHMODE WIFI_AUTH_OPEN
|
||
|
|
#elif CONFIG_EXAMPLE_WEP
|
||
|
|
#define DEFAULT_AUTHMODE WIFI_AUTH_WEP
|
||
|
|
#elif CONFIG_EXAMPLE_WPA
|
||
|
|
#define DEFAULT_AUTHMODE WIFI_AUTH_WPA_PSK
|
||
|
|
#elif CONFIG_EXAMPLE_WPA2
|
||
|
|
#define DEFAULT_AUTHMODE WIFI_AUTH_WPA2_PSK
|
||
|
|
#else
|
||
|
|
#define DEFAULT_AUTHMODE WIFI_AUTH_OPEN
|
||
|
|
#endif
|
||
|
|
#else
|
||
|
|
#define DEFAULT_RSSI -127
|
||
|
|
#define DEFAULT_AUTHMODE WIFI_AUTH_OPEN
|
||
|
|
#endif /*CONFIG_FAST_SCAN_THRESHOLD*/
|
||
|
|
|
||
|
|
static const char *TAG = "scan";
|
||
|
|
|
||
|
|
static esp_err_t event_handler(void *ctx, system_event_t *event)
|
||
|
|
{
|
||
|
|
switch(event->event_id) {
|
||
|
|
case SYSTEM_EVENT_STA_START:
|
||
|
|
ESP_LOGI(TAG, "SYSTEM_EVENT_STA_START");
|
||
|
|
ESP_ERROR_CHECK(esp_wifi_connect());
|
||
|
|
break;
|
||
|
|
case SYSTEM_EVENT_STA_GOT_IP:
|
||
|
|
ESP_LOGI(TAG, "SYSTEM_EVENT_STA_GOT_IP");
|
||
|
|
ESP_LOGI(TAG, "got ip:%s\n",
|
||
|
|
ip4addr_ntoa(&event->event_info.got_ip.ip_info.ip));
|
||
|
|
break;
|
||
|
|
case SYSTEM_EVENT_STA_DISCONNECTED:
|
||
|
|
ESP_LOGI(TAG, "SYSTEM_EVENT_STA_DISCONNECTED");
|
||
|
|
ESP_ERROR_CHECK(esp_wifi_connect());
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return ESP_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*init wifi as sta and set scan method*/
|
||
|
|
static void wifi_scan(void)
|
||
|
|
{
|
||
|
|
tcpip_adapter_init();
|
||
|
|
ESP_ERROR_CHECK(esp_event_loop_init(event_handler, NULL));
|
||
|
|
|
||
|
|
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
|
||
|
|
ESP_ERROR_CHECK(esp_wifi_init(&cfg));
|
||
|
|
wifi_config_t wifi_config = {
|
||
|
|
.sta = {
|
||
|
|
.ssid = DEFAULT_SSID,
|
||
|
|
.password = DEFAULT_PWD,
|
||
|
|
.scan_method = DEFAULT_SCAN_METHOD,
|
||
|
|
.sort_method = DEFAULT_SORT_METHOD,
|
||
|
|
.threshold.rssi = DEFAULT_RSSI,
|
||
|
|
.threshold.authmode = DEFAULT_AUTHMODE,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
|
||
|
|
ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config));
|
||
|
|
ESP_ERROR_CHECK(esp_wifi_start());
|
||
|
|
}
|
||
|
|
|
||
|
|
void app_main()
|
||
|
|
{
|
||
|
|
// Initialize NVS
|
||
|
|
esp_err_t ret = nvs_flash_init();
|
||
|
|
if (ret == ESP_ERR_NVS_NO_FREE_PAGES) {
|
||
|
|
ESP_ERROR_CHECK(nvs_flash_erase());
|
||
|
|
ret = nvs_flash_init();
|
||
|
|
}
|
||
|
|
ESP_ERROR_CHECK( ret );
|
||
|
|
|
||
|
|
wifi_scan();
|
||
|
|
}
|