docs/esp8266: esp.wifi_mode() replaced with network.WLAN.active().

docs/library/esp.rst

@@ -17,19 +17,6 @@ Functions
     If the ``address`` parameter is provided, sets the address to its value. If
     the function is called wihout parameters, returns the current address.
 
-.. function:: wifi_mode([mode])
-
-    Get or set the wireless network operating mode.
-
-    If the ``mode`` parameter is provided, sets the mode to its value. If
-    the function is called wihout parameters, returns the current mode.
-
-    The possible modes are defined as constants:
-
-        * ``STA_MODE`` -- station mode,
-        * ``AP_MODE`` -- software access point mode,
-        * ``STA_AP_MODE`` -- mixed station and software access point mode.
-
 .. function:: sleep_type([sleep_type])
 
     Get or set the sleep type.

docs/library/network.rst

@@ -269,6 +269,12 @@ For example::
     Methods
     -------
 
+    .. method:: wlan.active([is_active])
+
+        Activate ("up") or deactivate ("down") network interface, if boolean
+        argument is passed. Otherwise, query current state if no argument is
+        provided. Most other methods require active interface.
+
     .. method:: wlan.connect(ssid, password)
 
         Connect to the specified wireless network, using the specified password.