@bptworld is no longer maintaining the Ring Alarm Keypad G2 Community Driver.
I set up a new github repo for it and have made a few updates. I'll be hooking up HPM soon.
Continued discussion about the driver can be on this thread.
NB some users are having issues with the keypad pairing but not working correctly. A workaround seems to be using the "disable proximity sensor" preference on the device page. It is possible that the problem is with hardware version 4 and/or firmware version 2 keypads.