A couple implementation questions....
1) Is there a way to make the security code point to an array or use a list of codes separated by commas or something? I know I could make separate security keypad devices, but...
2) I'm thinking about tying this plugin into a Ring Keypad. Use the Z-Wave received signals to trigger a keypad plugin button press. Dual is working on this https://forums.indigodomo.com/viewtopic.php?f=128&t=22095, but you have the closest to a plugin that may be adaptable.