C7 S2 Fails?

Depends.

You can select the security level if it is an S2 device (by deselecting all of the security checkboxes it pairs non-secure).

If it is S0 only, you don't get the dialog and can't select non-secure. Which kind of sucks, TBH.

1 Like

That's why I questioned Mike's comment and was hoping they added that functionality since the last time I checked.

The reduced performance/reliabilty caused by S0 and the inability to disable it on the C7 for a lot of my devices is one of the main reasons I haven't moved any of them off the C5.

This isn't anything we can change, the z-wave stack we are required to use with the 700 series chip doesn't allow this.

Just to clarify, it's possible to disable S2 and S0 for S2 devices, but it's not possible to disable S0 for non-S2 devices?

Would it be possible to raise the issue with SiLabs?

That's not correct. I have 3 Gen2 Range Extenders that happily report status on my C5 hub. (And previously had a Gen 1 that reported power status on the same C5.)

Are the voodoo machinations that one has to go through to get power reporting working on an unsecured RRE crazy? No doubt, but it is possible.

Correct, unless it's a barrier device anyway.

1 Like

That doesn’t match my testing, they didn’t report power source on my C-5, but they do when paired S2 on my C-7. Perhaps I did something wrong, perhaps you know some trick that I don’t. However, Bryan Copeland (@bcopeland) reported the same in another thread:

Also, I said what I did because @ellomdian, the poster to whom I replied, said their hub was a C-7.

There is a trick, but nobody -AFAIK- knows exactly what it is. Currently, the trick is best described as "mess around with it until it works." My then-current theory was that a certain setting on a no-longer-available driver put it in some mode where it 'woke up' and then worked unauthenticated. That method worked pretty reliably for me, but I believe that others reported it didn't work for them.

That makes sense, and it would be -IMNSHO- foolish to pair on a C7 unauthenticated. But it should work the same unauthenticated on a C7 as it does on a C5.

Maybe you care, maybe you don't, but here are screenshots of one of mine working perfectly with my C5. One of my three has been in use longer than this one, plus the Gen 1 that has since been replaced, but my experience has been that once you get them to report, they will work fine for the duration. (I'm not intending to start a holy war, but I don't want someone with a C5 to think that these won't work as power status reporters (or repeaters, for that matter.) It is indeed a gold-plated-bear to get them to work, but it is possible.) These will eventually be paired (authenticated) on my C7, whenever I decide to move my devices.


Apparently non S2 devices that support S0 work fine when joined without S0 so what you said about not supporting that isn't a limitation of the hub's z-wave stack, unless that's just the inclusion piece of it, but was it a requirement for z-wave certification?

It wasn't specifically part of cert.
It's not clear to me how this is being done via a secondary controller, we can probably look into this though.

It may be why Z-Wave 700 series USB sticks are selling for less than 500 series USB sticks.

These are the options we have when starting node inclusion from the hub.

I wish there was more.. But this is what we are stuck with until they (silabs/z-wave alliance) open up more options

Using a secondary controller, yes, it is possible to prevent S0 bootstrapping, but no option exists from the primary controller.

4 Likes

Those options don't say anything about disabling S0, but Mike and others have confirmed that it's possible for S2 devices...

S2 devices always prompt with security options.

1 Like

So the z-wave stack is what's generating that prompt? And you can't force that prompt to be displayed for devices that don't support S2?

I'm asking because the Z-Wave PC Controller application displays it for devices that just support S0 and you can uncheck the box to make it join without S0.

what controller are you using as a secondary?, 500 or 700 series...

I've used the Aeotec Z-Stick GEN5 and Aeotec Z-Stick GEN7 (beta) as a primary controller with Z-Wave PC Controller and I'm pretty sure I got that prompt for S0 with both, but I'll double check with the GEN7.

I haven't tried using the GEN7 as a secondary controller with the C7, but when I have a moment I'll also test that and let you know.

PCController doesn’t use the the same controller framework that’s required for 700 series z-wave hubs

Itd be nice if we could use a c4 or c5 hub for this..