Control lights with an Arduino remotely with 433Mhz

I wanted to use Arduino's for a domotica project. The main purpose is to control the lights in my livingroom, using a web-interface. This way I can switch on and off my lights with my mobile phone, iPad, etc. even when I am not home (over the internet)! Because making elektrical connections with Arduino's and the outlet power supply went wrong one time earlier (blew all the fuses!), I wanted to use secure standard components for the high-power part. So, I bought these:


This is a set containing of one transmitter and a couple receivers to wirelessly switch lights (plugged into the outlets) on or off.

The Arduino has a 433 Mhz transmitter and receiver. This way I can listen to what is being broadcast, or I can send signals/codes myself. This is the one I am using: http://www.emartee.com/product/41357/



I used my Arduino to "sniff" the sent signal from the transmitter to the receiver switching the lights. I did this for all on/off combinations for all lights.

The Arduino is also equipped with an ethernet shield, so I can host a litte web application on it. I use this to be able to command my Arduino over the internet or my house network.

So I have:

• An Arduino that "understands" the remote control and can learn from it;
• The possibility to send signals myself as well;
• A small web application running on the Arduino.

In the video below, you can see I am learning the codes from the original transmitter to my Arduino. After learning, I can use the web interface on the Arduino, to retransmit those codes, to switch my lights on and off!

Useful links

• To be able to send and receive the remote's signals, I used the RemoteSwitch library as RF-library, check https://bitbucket.org/fuzzillogic/433mhzforarduino/wiki/Home
• For the webserver on the Arduino, I used the Webduino Library.
• To store the learned codes, and be able to remember them (even after a reset of the Arduino), I store them in the EEPROM. An easy way to store stuff in the EEPROM, is by using the EEPROMAnything code.
• My code examples:
• Simplified source using GET requests and without 7-segment LED display: https://gist.github.com/rogiervandenberg/1f923f0760225054946d
• Source code I am using in the video: https://gist.github.com/rogiervandenberg/1d9c138bbc44524c004c