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esp8266,esp32: Include hidden networks in WLAN.scan results. 

Addresses issues #2697 and #5329.

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George 2021-08-03 22:46:24 +10:00
parent bfc8e88ce1
commit 8616129f2e
3 changed files with 6 additions and 2 deletions
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2
docs/library/network.WLAN.rst
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@ -46,6 +46,8 @@ Methods
.. method:: WLAN.scan() .. method:: WLAN.scan()
Scan for the available wireless networks. Scan for the available wireless networks.
Hidden networks -- where the SSID is not broadcast -- will also be scanned
if the WLAN interface allows it.
Scanning is only possible on STA interface. Returns list of tuples with Scanning is only possible on STA interface. Returns list of tuples with
the information about WiFi access points: the information about WiFi access points:

2
ports/esp32/modnetwork.c
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@ -466,7 +466,7 @@ STATIC mp_obj_t esp_scan(mp_obj_t self_in) {
mp_obj_t list = mp_obj_new_list(0, NULL); mp_obj_t list = mp_obj_new_list(0, NULL);
wifi_scan_config_t config = { 0 }; wifi_scan_config_t config = { 0 };
// XXX how do we scan hidden APs (and if we can scan them, are they really hidden?) config.show_hidden = true;
MP_THREAD_GIL_EXIT(); MP_THREAD_GIL_EXIT();
esp_err_t status = esp_wifi_scan_start(&config, 1); esp_err_t status = esp_wifi_scan_start(&config, 1);
MP_THREAD_GIL_ENTER(); MP_THREAD_GIL_ENTER();

4
ports/esp8266/modnetwork.c
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@ -233,7 +233,9 @@ STATIC mp_obj_t esp_scan(mp_obj_t self_in) {
} }
mp_obj_t list = mp_obj_new_list(0, NULL); mp_obj_t list = mp_obj_new_list(0, NULL);
esp_scan_list = &list; esp_scan_list = &list;
wifi_station_scan(NULL, (scan_done_cb_t)esp_scan_cb); struct scan_config config = {0};
config.show_hidden = 1;
wifi_station_scan(&config, (scan_done_cb_t)esp_scan_cb);
while (esp_scan_list != NULL) { while (esp_scan_list != NULL) {
// our esp_scan_cb is called via ets_loop_iter so it's safe to set the // our esp_scan_cb is called via ets_loop_iter so it's safe to set the
// esp_scan_list variable to NULL without disabling interrupts // esp_scan_list variable to NULL without disabling interrupts