LOL, on the C4
Well when I put a car-puter in, I plan on having a PC-linked two-way pager and GPS. (Or cell phone connection-depending on cost)
But for now I think I have my alarm locked down as simple and cheap, yet effective as I can get it.
Basicly I will work totaly off of the keyless entry, to keep the remote stock.
To arm and un-arm the system, just use the remote to lock or unlock the car.
If you use the door-switch, or key-locks, the alarm status won't change.
If the alarm is off, and you use the door-switch, the alarm stays off, but the car locks.
If the alarm is on, and you use the key-lock to unlock the car, the alarm will still be active. (But have a 15-second delay)
The alarm would turn off anytime the car was started, or the remote used.
I will use the car horn as the alarm, the same as the Panic mode on the car.
The car will have shock, and two-zone perimiter sensors.
If there is motion on the outside perimiter zone, and the system is armed, the parking lights will flash as a warning.
Inside motion, or shock will set off the alarm.
I will use a red LED that will blink different depending on whether the system is armed or not.
(Rather then two colors, which would show a possible thief if the system was armed)