docs/network: esp8266: Describe wlan.config() method.

docs/library/network.rst

@@ -344,6 +344,37 @@ For example::
 
         nic.ifconfig(('192.168.0.4', '255.255.255.0', '192.168.0.1', '8.8.8.8'))
 
+    .. method:: wlan.config('param')
+    .. method:: wlan.config(param=value, ...)
+
+       Get or set general network interface parameters. These methods allow to work
+       with additional parameters beyond standard IP configuration (as dealt with by
+       ``wlan.ifconfig()``). These include network-specific and hardware-specific
+       parameters. For setting parameters, keyword argument syntax should be used,
+       multiple parameters can be set at once. For querying, paremeters name should
+       be quoted as a string, and only one paramter can be queries at time::
+
+        # Set WiFi access point name (formally known as ESSID) and WiFi channel
+        ap.config(essid='My AP', channel=11)
+        # Queey params one by one
+        print(ap.config('essid'))
+        print(ap.config('channel'))
+
+       Following are commonly supported parameters (availability of a specific parameter
+       depends on network technology type, driver, and MicroPython port).
+
+       =========  ===========
+       Parameter  Description
+       =========  ===========
+       essid      WiFi access point name (string)
+       channel    WiFi channel (integer)
+       hidden     Whether ESSID is hidden (boolean)
+       authmode   Authentication mode supported (enumeration, see module constants)
+       password   Access password (string)
+       =========  ===========
+
+
+
 .. only:: port_wipy
 
     class WLAN