There comes a Wi-Fi module using the technology of Internet of Things named Vigek IOT Core.
It is a cheap, small, modular, expandable and phone controlled IOT development platform.
It not only takes the wireless freedom of WiFi, but also is integrated with Camera.
So it's very suitable to build a quick IOT project.
The vigek site has given four example projects:Smart light bulbs, Monitoring system, PWM Controller, Smart Switch.
What else can you do?