This video about making a home automation just using a wifi module, In this project I have not used any microcontrollers or other device to support the wifi module. Low cost automation without using microcontroller bluetooth and RF modules.
http://www.labviewarduino.in/2015/04/...
check out the books on using esp8266 on arduino
http://www.amazon.com/Nodemcu-dev-kit...
book using lua
http://www.amazon.com/How-program-ESP...