157 lines
5 KiB
C
157 lines
5 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 the All Channel Scan or Fast Scan to connect
|
|
to a Wi-Fi network.
|
|
|
|
In the Fast Scan mode, the scan will stop as soon as the first network matching
|
|
the SSID is found. In this mode, an application can set threshold for the
|
|
authentication mode and the Signal strength. Networks that do not meet the
|
|
threshold requirements will be ignored.
|
|
|
|
In the All Channel Scan mode, the scan will end only after all the channels
|
|
are scanned, and connection will start with the best network. The networks
|
|
can be sorted based on Authentication Mode or Signal Strength. The priority
|
|
for the Authentication mode is: WPA2 > WPA > WEP > Open
|
|
*/
|
|
#include <string.h>
|
|
#include "freertos/FreeRTOS.h"
|
|
#include "freertos/event_groups.h"
|
|
#include "esp_wifi.h"
|
|
#include "esp_log.h"
|
|
#include "esp_event.h"
|
|
#include "nvs_flash.h"
|
|
|
|
#define DEFAULT_SCAN_LIST_SIZE CONFIG_EXAMPLE_SCAN_LIST_SIZE
|
|
|
|
static const char *TAG = "scan";
|
|
|
|
static void print_auth_mode(int authmode)
|
|
{
|
|
switch (authmode) {
|
|
case WIFI_AUTH_OPEN:
|
|
ESP_LOGI(TAG, "Authmode \tWIFI_AUTH_OPEN");
|
|
break;
|
|
case WIFI_AUTH_WEP:
|
|
ESP_LOGI(TAG, "Authmode \tWIFI_AUTH_WEP");
|
|
break;
|
|
case WIFI_AUTH_WPA_PSK:
|
|
ESP_LOGI(TAG, "Authmode \tWIFI_AUTH_WPA_PSK");
|
|
break;
|
|
case WIFI_AUTH_WPA2_PSK:
|
|
ESP_LOGI(TAG, "Authmode \tWIFI_AUTH_WPA2_PSK");
|
|
break;
|
|
case WIFI_AUTH_WPA_WPA2_PSK:
|
|
ESP_LOGI(TAG, "Authmode \tWIFI_AUTH_WPA_WPA2_PSK");
|
|
break;
|
|
case WIFI_AUTH_WPA2_ENTERPRISE:
|
|
ESP_LOGI(TAG, "Authmode \tWIFI_AUTH_WPA2_ENTERPRISE");
|
|
break;
|
|
default:
|
|
ESP_LOGI(TAG, "Authmode \tWIFI_AUTH_UNKNOWN");
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void print_cipher_type(int pairwise_cipher, int group_cipher)
|
|
{
|
|
switch (pairwise_cipher) {
|
|
case WIFI_CIPHER_TYPE_NONE:
|
|
ESP_LOGI(TAG, "Pairwise Cipher \tWIFI_CIPHER_TYPE_NONE");
|
|
break;
|
|
case WIFI_CIPHER_TYPE_WEP40:
|
|
ESP_LOGI(TAG, "Pairwise Cipher \tWIFI_CIPHER_TYPE_WEP40");
|
|
break;
|
|
case WIFI_CIPHER_TYPE_WEP104:
|
|
ESP_LOGI(TAG, "Pairwise Cipher \tWIFI_CIPHER_TYPE_WEP104");
|
|
break;
|
|
case WIFI_CIPHER_TYPE_TKIP:
|
|
ESP_LOGI(TAG, "Pairwise Cipher \tWIFI_CIPHER_TYPE_TKIP");
|
|
break;
|
|
case WIFI_CIPHER_TYPE_CCMP:
|
|
ESP_LOGI(TAG, "Pairwise Cipher \tWIFI_CIPHER_TYPE_CCMP");
|
|
break;
|
|
case WIFI_CIPHER_TYPE_TKIP_CCMP:
|
|
ESP_LOGI(TAG, "Pairwise Cipher \tWIFI_CIPHER_TYPE_TKIP_CCMP");
|
|
break;
|
|
default:
|
|
ESP_LOGI(TAG, "Pairwise Cipher \tWIFI_CIPHER_TYPE_UNKNOWN");
|
|
break;
|
|
}
|
|
|
|
switch (group_cipher) {
|
|
case WIFI_CIPHER_TYPE_NONE:
|
|
ESP_LOGI(TAG, "Group Cipher \tWIFI_CIPHER_TYPE_NONE");
|
|
break;
|
|
case WIFI_CIPHER_TYPE_WEP40:
|
|
ESP_LOGI(TAG, "Group Cipher \tWIFI_CIPHER_TYPE_WEP40");
|
|
break;
|
|
case WIFI_CIPHER_TYPE_WEP104:
|
|
ESP_LOGI(TAG, "Group Cipher \tWIFI_CIPHER_TYPE_WEP104");
|
|
break;
|
|
case WIFI_CIPHER_TYPE_TKIP:
|
|
ESP_LOGI(TAG, "Group Cipher \tWIFI_CIPHER_TYPE_TKIP");
|
|
break;
|
|
case WIFI_CIPHER_TYPE_CCMP:
|
|
ESP_LOGI(TAG, "Group Cipher \tWIFI_CIPHER_TYPE_CCMP");
|
|
break;
|
|
case WIFI_CIPHER_TYPE_TKIP_CCMP:
|
|
ESP_LOGI(TAG, "Group Cipher \tWIFI_CIPHER_TYPE_TKIP_CCMP");
|
|
break;
|
|
default:
|
|
ESP_LOGI(TAG, "Group Cipher \tWIFI_CIPHER_TYPE_UNKNOWN");
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Initialize Wi-Fi as sta and set scan method */
|
|
static void wifi_scan(void)
|
|
{
|
|
esp_netif_init();
|
|
ESP_ERROR_CHECK(esp_event_loop_create_default());
|
|
esp_netif_t *sta_netif = esp_netif_create_default_wifi_sta();
|
|
assert(sta_netif);
|
|
|
|
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
|
|
ESP_ERROR_CHECK(esp_wifi_init(&cfg));
|
|
|
|
uint16_t number = DEFAULT_SCAN_LIST_SIZE;
|
|
wifi_ap_record_t ap_info[DEFAULT_SCAN_LIST_SIZE];
|
|
memset(ap_info, 0, sizeof(ap_info));
|
|
|
|
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
|
|
ESP_ERROR_CHECK(esp_wifi_start());
|
|
ESP_ERROR_CHECK(esp_wifi_scan_start(NULL, true));
|
|
ESP_ERROR_CHECK(esp_wifi_scan_get_ap_records(&number, ap_info));
|
|
|
|
for (int i = 0; i < DEFAULT_SCAN_LIST_SIZE; i++) {
|
|
ESP_LOGI(TAG, "SSID \t\t%s", ap_info[i].ssid);
|
|
ESP_LOGI(TAG, "RSSI \t\t%d", ap_info[i].rssi);
|
|
print_auth_mode(ap_info[i].authmode);
|
|
if (ap_info[i].authmode != WIFI_AUTH_WEP) {
|
|
print_cipher_type(ap_info[i].pairwise_cipher, ap_info[i].group_cipher);
|
|
}
|
|
ESP_LOGI(TAG, "Channel \t\t%d\n", ap_info[i].primary);
|
|
}
|
|
|
|
}
|
|
|
|
void app_main(void)
|
|
{
|
|
// Initialize 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 );
|
|
|
|
wifi_scan();
|
|
}
|