Hi mate!!
Yes... its so pity
I have always desired to fit the AWS, but it's a really hard job... so much more hard than fit the trip computer, which I fitted in November.
I'll explain my little project done for the auto-lock and emergency system. It's a little circuit composed by:
* 3 relays (one for open doors, one for close the doors and the third controls the emergency lights),
* one microcontroller 16F84A (it has 1KB FLASH memory for the program),
* a L293B driver for activate the relays and control the trip computer's LED (it will simulate an alarm when the car is off and the doors closed, it shines if the amount of fuel is low and also it will indicate an error on the module or on the central locking system),
* a little speaker for do a beep when a trip computer's button is pushed or when the amount of fuel is low. It also beeps at other times (if the emergency system is activated when the deceleration is abrupt, if the auto-lock is activated when the car is off indicating that the car will be closed 1 minute after the car is off to remember getting the keys, ...).
The software is written in C language and compiled for the 16F84A microcontroller. It controls:
* the real time vehicle speed
* locks the doors when the car goes from 14 Kms/h to over 15 Kms/h (aceleration to run on the city)
* locks the doors when the car goes from 31 kms/h to 30 kms/h (deceleration to stop the car)
* unlocks the doors when the car goes from 79 kms/h to 80 kms/h (for our security, aceleration to run on the road)
* unlocks the doors if an abruptly deceleration is detected (the security is very very important!!!)
* flashes the emergency lights if an abruptly deceleration is detected and keeps them flashing until we acelerate the vehicle after 10 seconds from the dangerous moment
* Also controls malfunction of the central locking system
* Uses the trip computer's LED for simulate an alarm when the car is off and locked,
* If the car is off when the doors is locked and then the doors are open, the auto-lock mode is activated for close the doors automatically 1 minute after we go out of the car, or 30 seconds after it if the mode is activated when we was out of the car. This mode will be deactivated when the car is on. If the car is off and the doors aren't locked any time, this mode will be keeping off until the doors are locked and then unlocked again.
If do you want I can explain what the input/outputs are configurated in the microcontroller, where they are connected and I can send you the software for programming the microcontroller. It's very easy to do :L .
Cheers!!!!!!