Centralite 3400 Keypad support

I’m trying to get a Centralite 3400 zigbee keypad to work. I’ve successfully added to the mesh and it registers itself as a push-button, unfortunately not a keypad/pin device. Any suggestions?

Unfortunately, we don’t currently have support for any keypad devices.

I also am looking to use a Centralite 3400 Keypad.
I am willing to work on building the Adapter for it but ANY assistance on doing that would be greatly appreciated.
I am reviewing the Smart Things adapter to map out the properties, actions and events.
How to hook into the zigbee adapter for the communication is the part I am confused about.