Internet :
the current mobile phone or tablet and WiFi plug are
connected via some extra internet network loops rather within a router
coverage, the following figure shows the topology.
Off-line :
it means the current mobile phone or tablet and WiFi plug are
unsuccessfully connected, the plug can be controlled.
6.5.5.2 The control interface
Lock :
Only administrator is permitted to control;
Unlock :
Related members are all allowed to control.
Control key
：
control the three states
