Hi Yogesh,

Armed or disarmed should be a state in the firmware, not the hardware.

Moreover, there should likely be more than just the two states, armed or disarmed. For example, you might have a state wherein no internal sensors, like PIRs (Passive InfraRed sensors for those not versed in the industry vernacular) are ignored but perimeter sensors (magnetic reed contacts on doors and windows) are reported with a soft beep or ring. Such a state is good for people who have small children that might slip out the back door unawares, or who don't want anyone just walking in during the day. You might have another state wherein the perimeter is fully armed, but the internal sensors are ignored, for when you're at home for the night. Then there are some circuits which should be fully armed regardless of the state of the panel or system. You would never want to disarm the smoke sensors, nor would you want to disarm a medical alert button or a personal panic button. There might be other circuits (zones) that have their own protocols for armed/intermediate/or disarmed status. If you have a liquor cabinet or a gun cabinet you would probably want them to remain fully armed while the babysitter is home with the children.

The point is that all of these scenarios, all of these different states, should be controlled by firmware, not by hardware.

Good luck,

Joe