static void IRAM_ATTR esp_now_scan_peers_done (void)
{
mutex_lock(&_esp_now_dev.dev_lock);
esp_err_t ret;
uint16_t ap_num;
ret = esp_wifi_scan_get_ap_num(&ap_num);
DEBUG("wifi_scan_get_ap_num ret=%d num=%d\n", ret ,ap_num);
if (ret == ESP_OK && ap_num) {
uint32_t state;
/* reallocation of memory must not be disturbed */
critical_enter_var(state);
/* allocate memory for APs record list blockwise and fetch them the list */
if (ap_num > aps_size) {
if (aps) {
/* free allocated AP record list memory */
aps_size = 0;
free (aps);
}
/* allocate new memory */
aps_size = (ap_num & ~(ESP_NOW_APS_BLOCK_SIZE - 1)) + ESP_NOW_APS_BLOCK_SIZE;
aps = malloc(sizeof(wifi_ap_record_t) * aps_size);
ap_num = aps_size;
}
critical_exit_var(state);
ret = esp_wifi_scan_get_ap_records(&ap_num, aps);
DEBUG("wifi_scan_get_aps ret=%d num=%d\n", ret, ap_num);
critical_enter_var(state);
/* iterate over APs records */
for (uint16_t i = 0; i < ap_num; i++) {
/* check whether the AP is an ESP_NOW node which is not already a peer */
if (strncmp((char*)aps[i].ssid, ESP_NOW_AP_PREFIX, ESP_NOW_AP_PREFIX_LEN) == 0 &&
!esp_now_is_peer_exist(aps[i].bssid)) {
/* add the AP as peer */
_esp_now_add_peer(aps[i].bssid, aps[i].primary, esp_now_params.key);
}
}
critical_exit_var(state);
}
#if ENABLE_DEBUG
esp_now_peer_num_t peer_num;
esp_now_get_peer_num (&peer_num);
DEBUG("associated peers total=%d, encrypted=%d\n",
peer_num.total_num, peer_num.encrypt_num);
#endif
_esp_now_scan_peers_done = true;
/* set the time for next scan */
xtimer_set (&_esp_now_scan_peers_timer, esp_now_params.scan_period);
mutex_unlock(&_esp_now_dev.dev_lock);
}
static void scan_task(void *pvParameters)
{
while(1) {
xEventGroupWaitBits(wifi_event_group, SCAN_DONE_BIT, false, true, portMAX_DELAY);
ESP_LOGI(TAG, "WIFI scan doen");
xEventGroupClearBits(wifi_event_group, SCAN_DONE_BIT);
uint16_t apCount = 0;
esp_wifi_scan_get_ap_num(&apCount);
printf("Number of access points found: %d\n", apCount);
if (apCount == 0) {
ESP_LOGI(TAG, "Nothing AP found");
return;
}
wifi_ap_record_t *list = (wifi_ap_record_t *)malloc(sizeof(wifi_ap_record_t) * apCount);
ESP_ERROR_CHECK(esp_wifi_scan_get_ap_records(&apCount, list));
int i;
printf("======================================================================\n");
printf(" SSID | RSSI | AUTH \n");
printf("======================================================================\n");
for (i=0; i<apCount; i++) {
char *authmode;
switch(list[i].authmode) {
case WIFI_AUTH_OPEN:
authmode = "WIFI_AUTH_OPEN";
break;
case WIFI_AUTH_WEP:
authmode = "WIFI_AUTH_WEP";
break;
case WIFI_AUTH_WPA_PSK:
authmode = "WIFI_AUTH_WPA_PSK";
break;
case WIFI_AUTH_WPA2_PSK:
authmode = "WIFI_AUTH_WPA2_PSK";
break;
case WIFI_AUTH_WPA_WPA2_PSK:
authmode = "WIFI_AUTH_WPA_WPA2_PSK";
break;
default:
authmode = "Unknown";
break;
}
printf("%26.26s | % 4d | %22.22s\n",list[i].ssid, list[i].rssi, authmode);
}
free(list);
printf("\n\n");
// scan again
vTaskDelay(2000 / portTICK_PERIOD_MS);
//The true parameter cause the function to block until the scan is done.
ESP_ERROR_CHECK(esp_wifi_scan_start(&scanConf, true));
}
}
/**
* private
* scan callback
* @param result void *arg
* @param status STATUS
*/
void WiFiScanClass::_scanDone()
{
WiFiScanClass::_scanComplete = true;
WiFiScanClass::_scanStarted = false;
esp_wifi_scan_get_ap_num(&(WiFiScanClass::_scanCount));
if(WiFiScanClass::_scanCount) {
WiFiScanClass::_scanResult = new wifi_ap_record_t[WiFiScanClass::_scanCount];
if(WiFiScanClass::_scanResult) {
esp_wifi_scan_get_ap_records(&(WiFiScanClass::_scanCount), (wifi_ap_record_t*)_scanResult);
} else {
//no memory
WiFiScanClass::_scanCount = 0;
}
}
}
