@mitchp created a device handler and smartapp for the centralite keypad that was originally intended for Xfinity customers. But the new iris keypad (not the old one) is apparently pretty much the same thing and his DTH and smartapp work fine. The thread is here:
Yes the app only allows for one code. I have two instances of the smartapp installed for the keypads at my front and back doors, but I use the same pin for each (maybe each instance could handle a different PIN, I’m not sure).
Iris marketing indicates the keypad can function as a door chime, that’s apparently not possible with ST for now at least.
As far as I can tell, the smartapp maps a routine to the on, off and partial buttons on the keypad (the app calls arm/away, disarm and arm/stay respectively, which is consistent with smart home monitor’s terminology). Panic and * don’t do anything at this time.
My routines only arm (away/stay) and disarm SHM, but I don’t see why I couldn’t do whatever I want as long as it can be configured in the assigned routine (e.g. turn on a light too). Haven’t tried that though.
The function is pretty straightforward to me, just that we can’t do everything the device is apparently capable of since we’re not using the Iris hub.
Note that when I set it up, I was having problems with it responding, which I eventually figured out was related to the fact that I paired it to the hub and set it up closer to the hub, then moved it to where I intended to use it next to my doors. It didn’t seem to like that. You might want to try unpairing then repairing with your hub to see if that helps.
Also, @blebson altered a smartapp that was originally designed to be used with locks, to function with the centralite keypads. I think he may have gotten different PIN #s working in some way, but I haven’t had the need to try it. That same forum thread includes a discussion of his app as well.