commit b97c17e125b9eaf5dfa9a5d540175377c79e34fd
author puuu <puuu@users.noreply.github.com> Wed Oct 12 10:08:40 2016 +0900
committer Paul Sokolovsky <pfalcon@users.sourceforge.net> Tue Nov 01 06:59:41 2016 +0300
tree 451a9a59eae589dfe3b9f39f94347b5f57384afa
parent eddcf0a5de7a1fe73ccf5c9e85b57aaf9c527bad

esp8266/modnetwork.c: Allows AP reconnection without WiFi credentials

There is no automatic reconnect after wlan.active(False);
wlan.active(True). This commit provide the possibility to run
wlan.connect() without parameter, to reconnect to the previously
connected AP.

resolve #2493

esp8266/modnetwork.c

diff --git a/esp8266/modnetwork.c b/esp8266/modnetwork.c
index ed828e5..a48edcf 100644
--- a/esp8266/modnetwork.c
+++ b/esp8266/modnetwork.c
@@ -100,17 +100,23 @@
     mp_uint_t len;
     const char *p;
 
-    p = mp_obj_str_get_data(args[1], &len);
-    memcpy(config.ssid, p, len);
-    p = mp_obj_str_get_data(args[2], &len);
-    memcpy(config.password, p, len);
+    if (n_args > 1) {
+        p = mp_obj_str_get_data(args[1], &len);
+        memcpy(config.ssid, p, len);
+        if (n_args > 2) {
+            p = mp_obj_str_get_data(args[2], &len);
+        } else {
+            p = "";
+        }
+        memcpy(config.password, p, len);
 
-    error_check(wifi_station_set_config(&config), "Cannot set STA config");
+        error_check(wifi_station_set_config(&config), "Cannot set STA config");
+    }
     error_check(wifi_station_connect(), "Cannot connect to AP");
 
     return mp_const_none;
 }
-STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(esp_connect_obj, 3, 7, esp_connect);
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(esp_connect_obj, 1, 7, esp_connect);
 
 STATIC mp_obj_t esp_disconnect(mp_obj_t self_in) {
     require_if(self_in, STATION_IF);