The ZigBee version should work, but we don't support codes via our UI, you'd have to add them via the key pad on the lock.
I know it works with the Almond+, but I haven't tested it with the 2015 as yet. I haven't added it to the list of supported devices yet, but I'll check that everything is working properly today and update the list accordingly.
As a general piece of information, Yale does ZigBee and Z-Wave modules for their locks and it's even possible to change them, if you can get hold of the modules.