Vll
ABSTRACT
An effective Security System must be able to minimize, if not to eliminate, a
break-in. A good security system has to be designed and carefully installed according
to its environment in order for it to work well. It must not restrict the occupant' s
lifestyle but remains effective, simple and trouble free in operational at all times. The
basic feature of this project is to develop a security system as well as keyless entry
system (for example, combination lock), to unlock a house door via CAN (Controller
Area Network) communication. This system is able to communicate and control
different nodes such as detector nodes, switch nodes, sensors as well as the alarm
system using the same 2-wires in the CAN Bus. The advantage of CAN Bus is that it
has remarkable operation even in high noise environments. User enters a series of
number and alphabets where the data are then sent from the keypad node to the
related nodes to execute desired operation. For example, a particular combination
may be used to open the door and turning off the alarm system, while another
password may only the door while triggering a delayed alarm. This system also
allows the process of system expansion as well as improvement when required in the
