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feat(esp_wifi): Showcases the new scan by bitmap config

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- Showcases the ability to scan by the bitmap config newly added
to the wifi_scan_config_t by implementing it in the scan config
This commit is contained in:
jgujarathi 2024-03-29 18:40:49 +05:30 committed by BOT
parent 9a88dab748
commit 0d7c909e87
3 changed files with 42 additions and 3 deletions
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5
examples/wifi/scan/README.md
View File

@ -23,7 +23,8 @@ Open the project configuration menu (`idf.py menuconfig`).
In the `Example Configuration` menu:
* Set the Example configuration.
* Use `Max size of scan list` to set the maximum nunber of access points in the list.
* Use `Max size of scan list` to set the maximum number of access points in the list.
* Use 'Scan Channel list' to list specific channels you wish to scan. For eg. 1,6,9,11. By Default all channels will be scanned.
### Build and Flash
@ -47,7 +48,7 @@ As you run the example, you will see the following log:
I (443) wifi:wifi firmware version: 6bff005
I (443) wifi:wifi certification version: v7.0
I (443) wifi:config NVS flash: enabled
I (443) wifi:config nano formating: disabled
I (443) wifi:config nano formatting: disabled
I (453) wifi:Init data frame dynamic rx buffer num: 32
I (453) wifi:Init management frame dynamic rx buffer num: 32
I (463) wifi:Init management short buffer num: 32

7
examples/wifi/scan/main/Kconfig.projbuild
View File

@ -7,4 +7,11 @@ menu "Example Configuration"
help
The size of array that will be used to retrieve the list of access points.
config EXAMPLE_USE_SCAN_CHANNEL_BITMAP
bool "Scan only non overlapping channels using Channel bitmap"
default 0
help
Enable this to scan only the non overlapping channels i.e 1,6,11 by mentioning a channel bitmap
in scan config. If you wish to scan a different set of specific channels, please edit the channel_list
array in scan.c. Channels for a 2.4 ghz network range should range from 1-14.
endmenu

33
examples/wifi/scan/main/scan.c
View File

@ -17,9 +17,16 @@
#include "esp_log.h"
#include "esp_event.h"
#include "nvs_flash.h"
#include "regex.h"
#define DEFAULT_SCAN_LIST_SIZE CONFIG_EXAMPLE_SCAN_LIST_SIZE
#ifdef CONFIG_EXAMPLE_USE_SCAN_CHANNEL_BITMAP
#define USE_CHANNEL_BTIMAP 1
#define CHANNEL_LIST_SIZE 3
static uint8_t channel_list[CHANNEL_LIST_SIZE] = {1, 6, 11};
#endif /*CONFIG_EXAMPLE_USE_SCAN_CHANNEL_BITMAP*/
static const char *TAG = "scan";
static void print_auth_mode(int authmode)
@ -133,6 +140,17 @@ static void print_cipher_type(int pairwise_cipher, int group_cipher)
}
}
#ifdef USE_CHANNEL_BTIMAP
static void array_2_channel_bitmap(const uint8_t channel_list[], const uint8_t channel_list_size, wifi_scan_config_t *scan_config) {
for(uint8_t i = 0; i < channel_list_size; i++) {
uint8_t channel = channel_list[i];
scan_config->channel_bitmap.ghz_2_channels |= (1 << channel);
}
}
#endif /*USE_CHANNEL_BTIMAP*/
/* Initialize Wi-Fi as sta and set scan method */
static void wifi_scan(void)
{
@ -149,9 +167,23 @@ static void wifi_scan(void)
uint16_t ap_count = 0;
memset(ap_info, 0, sizeof(ap_info));
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
ESP_ERROR_CHECK(esp_wifi_start());
#ifdef USE_CHANNEL_BTIMAP
wifi_scan_config_t *scan_config = (wifi_scan_config_t *)calloc(1,sizeof(wifi_scan_config_t));
if (!scan_config) {
ESP_LOGE(TAG, "Memory Allocation for scan config failed!");
return;
}
array_2_channel_bitmap(channel_list, CHANNEL_LIST_SIZE, scan_config);
esp_wifi_scan_start(scan_config, true);
#else
esp_wifi_scan_start(NULL, true);
#endif /*USE_CHANNEL_BTIMAP*/
ESP_LOGI(TAG, "Max AP number ap_info can hold = %u", number);
ESP_ERROR_CHECK(esp_wifi_scan_get_ap_records(&number, ap_info));
ESP_ERROR_CHECK(esp_wifi_scan_get_ap_num(&ap_count));
@ -165,7 +197,6 @@ static void wifi_scan(void)
}
ESP_LOGI(TAG, "Channel \t\t%d", ap_info[i].primary);
}
}
void app_main(void)