Introduction: 432 MHz Wireless Sensors and Power Outlets for Home Automation Using Arduino

About: I am a researcher leading quantum optics labiratory. Previously I was working on development of optical atomic clocks. Electronics is my hobby since childhood when my uncle was bringing me old phones to play a…

Home automation becomes more and more popular, affordable  and fascinates people. Internet offers such possibilities as never before. Impress your friends showing on Iphone that you can switch on/off lamp in your apartment 1000 km away and simultaneously see it through a webcam.

Wirelessly controlled  power outlets are best suited for switching on/off appliances as they do not need cables  and only the remote control needs to be interfaced to a microcontroller. Design is electric -shock -safe as the high voltage modules are not opened.
Arduino microcontroller greatly simplifies the task, because it is a standard board that can be easily reprogrammed. Arduino could be connected to a PC, WiFi  router with USB running OpenWRT, or direct connection to Internet could be done via Arduino Ethernet shield.

Picture below illustrates how home automation box  could look.  There are external sensors attached to Arduino, PIR, photodiode, sound level monitor, 1-wire temperature sensors DS18B20

The first attached pdf file contains details how to program Arduino for steering the wireless power sockets.

Second pdf file describes how to connect sensors and relays.