Articles about module
Home automation modules primarily communicate via the electrical wiring in your house. Two common protocols for this communication are X10 and INSTEON. X10 is an open standard for home automation developed in 1975. INSTEON was developed by SmartLabs, Inc and can be run as X10 compatible and/or with INSTEON which is somewhat more robust than X10. Both protocols are sufficient for most simple home automation needs.
A properly configured home automation system can be used to improve the security of your home. It can do a much better job of making it appear that someone is home than the old fashioned light on a timer.