Control the air conditioner using Arduino

In this project, an additional Arduino Uno with Ethernet shield is used to make the Web server. There are many instructions on the internet on how to use Arduino Ethernet shield, so this post will focus more on building the web server UI and interfacing with various GPIOs of Arduino. The server has two main functions for now, 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. After everything was figured out, Poin2’s Web server looked like this:

For further details visit to the  author’s site