Controlling A/C over the internet via Arduino

This project shows how to control AC in an office at outside of the office using Arduino Uno with Ethernet shield.

The webpage provides 2 convenient functions displayed in following picture. One is “Weekend Mode” to enable/disable automatic control of A/C, and the other is pure remote controls to manually turn A/C on and off. 

The original site is http://blog.poin2.com/2015/06/controlling-ac-over-the-internet-via-arduino/