RBoy
(www.rboyapps.com - Making SmartThings Easy!)
4
There are two device handlers available, ZigBee Lock and ZigBee Lock without Codes. Make sure you’re using the ZigBee Lock device handler.
Once that’s done you’ll need a compatible SmartApp to program your codes. You can use the built in SmartLocks app with SmartThings for basic code programming (if you forget the code you’ll have to delete and recreate it) or (if you have access to RBoy Apps) a more advanced app like Lock User Management which allows you create many different types of codes (scheduled, expiration, one time, mode, presence etc), and lets you see/change codes through an UI amongst other features.