I'll assume you have a C8 or newer hub. On my C7 I am using the original V1 keypad, and it's by far the most reliable & versatile I've ever used( Ihave 5 other Iris keypads). Doubles as a button controller with the driver from @iris . And these are dirt cheap 10-15 USD. Batteries last 1.5- 2 years with daily use.
