Android mobile based home security and device control using GSM

A home automation technique based on ARM controller. This technique uses an IR sensor to detect the person. If the IR sensor detects a person then the keypad will be activated to enter the pass code. A SMS will be sent to the owner for authentication. Depending on the owner's replay the door will open. If the person enters a wrong password, an intimation message will be sent to the owner and at the mean time buzzer will be activated. Android application is used to control the electrical appliances. The firmware for this paper is written in embedded `C' language and the machine codes for the program are stored in the non-volatile flash memory of the embedded controller.