Hi, I am tyring to find a Keypad (0-19, Enter) that I can use outdoors and that I can connect to a PC hopefully via RS485. This specific project I am looking at will required 17 keypads to be connected to a PC so the codes the user enters in the keypad are verified against a Database and then if valid I would need to turn on a Relay in the keypad for a certain amount of time to turn on a light by the keypad.
I've looked around the net and I've seen many keypads, some with relays in them but it seems that most keypads you actually need to program the valid codes in the keypad itself, something that will not work for me because once the code gets entered into the keypad it will not work again until it gets activated back in the PC.
This application is very similar to access control with the exception that I need to be able to set the relay to be turned on for like 5 minutes and I need to be able to verify the the code entered in the keypad before turning on the relay.
Any ideas/Suggestions? I needed to keep the keypad for under $350 if at all possible.
Thanks Miguel