Are there any roadmap for Z-Wave S2 authentication support? Using S0 is both less secure and requires a lot more bandwidth. After adding just a couple of devices with S0 the entire Z-Wave network crumbles entirely and becomes almost unusable due to the slow performance.
S2 support would be greatly appreciated. Alternatively, I would probably end up looking for a third party Z-Wave controller if I can find one I like.
I currently have 38 zwave devices that are not S2 and have zero issues.
perhaps you have another problem with your setup.
Right, but are they using S0 or not security at all? The latter works well in my experience, but then the Z-wave traffic is in the clear.
I uploaded a map of my devices in my last post.
I do have a few secure devices (locks, smoke detectors, etc) but the majority are light and power switches/dimmers
I’m not concerned if my neighbors really want to view my zwave traffic when i turn my lights on and off. the locks are secure, so no worries for me
Right, but first of all, S0 is objectively weaker than S2. The key is sent in the clear so it would in theory be possible to compromise your doorlock. Unlikely, unless someone is really paying attention, but still possible. S0 also, as mentioned, comes with a lot of network overhead. You’re fine if you have 1-4 S0 devices, but more than that and you’ll absolutely see network performance drop dramatically.
At any rate, I’m not too interested in discussing the value of S2 support, but rather whether S2 support is on the roadmap at all.
No, there is no S2 support and no current plans.
Home Assistant does not implement the Z-Wave stack. It relies on OpenZWave to do so. OZW would need to implement it first before HA could even plan for any UI or other support. As it stands, the work in OZW for S2 has barely even progressed.
As with @ghvader, I have no reason to use S0 except for those devices that require it, and my network runs smoothly. As you said you’re not interested in that discussion, so your requirement excludes HA’s Z-Wave from consideration.
Another alternative to look out for is zwavejs2mqtt. It’s based on an entirely different Z-Wave stack than OZW and is in active development. It doesn’t support S2 yet either, but if I had to make a bet, it will support S2 before OZW does. You’ll still have to wait for some unknown time, so if “now” is your timeline, a commercial z-wave hub is your only choice. There are no other viable opensource z-wave stacks, and if there are I’d love to hear about them.
Thank you for the answer. I’ll probably look at commerical Z-wave hubs and integrate them with HA 
Cheers
Thanks a lot for the zwavejs link, I will give this a shot for sure.
Good luck because even most of those haven’t done much with S2. Hubitat ignores it, Smartthings might have it but I don’t think its there yet either.
Hubitat fully supports S2 on their C-7 hub.
(oops, necro post. lol)
