Why would my switch be operating with security as ZWAVE_S0_DOWNGRADE instead of S2? I’d call myself mid-techy but have not looked into S2 and how get that working for these switches. Thanks in advance! Kevin

What hub are you using? Very few actually support S2 at this moment (SmartThings doesn’t, Hubitat doesn’t, Home Assistant/Open Z-Wave doesn’t…), so this is pretty common: most (I think all, with rare exceptions) devices that ask for S2 but can’t get it will go for S0 instead. On the other hand, if …

Smartthings hub V3. Had no idea, just assumed it supported S2. Will keep researching, thanks for replying!

The ST v3 hub is new enough that it should (“must,” technically) support S2, but they got an exemption from the Z-Wave Alliance under the promise that it would be added at some point after its release. :slight_smile:

As an update, my latest added switches are communicating with: networkSecurityLevel: ZWAVE_S2_AUTHENTICATED @EricM_Inovelli is there an easy way to upgrade all switches that are currently S0 to S2? I do have a z-stick and Z-Wave PC Controller 5.39

The only way to get the device “upgraded” is to exclude it and then include it again with the new SmartThings app. Through the new app you can scan the QR code on the device and get it included with S2. There is really not much of a benefit of using S2 over S0. S2 mostly fixed a flaw where the netw…

Interesting, so if my switch is S2 and my ilumin bulb is S0 then association won’t work? Will have to check that out.

Yeah, I believe so. Essentially you have to force the switch to pair in S0 mode by using the classic app or cancelling out of the QR code inclusion process (I think that works). You need the bulb to pair in S0 mode which is easier to do if you pair it as close to the hub as possible. If I am wrong …

[image] EricM_Inovelli: There is really not much of a benefit of using S2 over S0. I’m not an expert, but doesn’t S2 have far less “overhead” than S0, which should result in at least either faster commands/reports or less traffic on your Z-Wave network (making everything better), if not both?…

[image] BertABCD1234: (Cough couch, old Schlage lock, cough cough…) Feel lucky. I bought the Bluetooth Schlage lock that I can’t even pair with Hubitat…Had I only known that I would be diving into the Smart Home scene…

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Bry December 9, 2019, 7:02pm 5

LZW30-SN - Red Series ON-OFF Switch Recognized as Z-wave Secure Switch General Discussion

@kvkalidindi – could you let me know what Hub you’re using? I’ve noticed this on SmartThings, but honestly we’re not sure why this is happening. The short answer we’ve discovered is that these switches are S2 Certified and SmartThings doesn’t support S2, so if you look in IDE, it either pairs as, “S2_FAILED” or “S0_DOWNGRADE” or something like that. No, I can promise you that all the switches are Z-Wave Plus, S2 Certified and SmartStart enabled. What you can try doing is removing the device …

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