Merge pull request #3727 from BennyE/wifi-full-scan

esp32s2: Do a full scan when channel/BSSID are not given

Author: tannewt

ports/esp32s2/common-hal/wifi/Radio.c

@@ -142,6 +142,13 @@ wifi_radio_error_t common_hal_wifi_radio_connect(wifi_radio_obj_t *self, uint8_t
     } else {
         config->sta.bssid_set = 0;
     }
+    // If channel is 0 (default/unset) and BSSID is not given, do a full scan instead of fast scan
+    // This will ensure that the best AP in range is chosen automatically
+    if ((config->sta.bssid_set == 0) && (config->sta.channel == 0)) {
+        config->sta.scan_method = WIFI_ALL_CHANNEL_SCAN;
+    } else {
+        config->sta.scan_method = WIFI_FAST_SCAN;
+    }
     esp_wifi_set_config(ESP_IF_WIFI_STA, config);
     self->starting_retries = 5;
     self->retries_left = 5;