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Smart Home Forum by FIBARO Team

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How to deal with security levels S0, S2



With the ZW3 engine you can now include Z-Wave modules with security level S2.

From the inclusion screen you can choose S0 or S2. You cannot choose to have no security if it supports S0.


Little bit confused on the different types. I thought S2 is S2 but apparently there are different flavors.

NS      No Security

S0      Security S0

S2U    Security S2 Unauthenticated 

S2A    Security S2 Authenticated 

S2AC Security S2 Access Control


It looks like Fibaro uses multiple security modes for their devices. Dimmer 2 and Wall plug don't have any QR with DSK code but include in a security mode, S2U?  Seems like these new devices are still S0

Other modules like the Smart implant, Smart module and RGBW module have a DSK code, S2A?


My problem with this. When you want to make associations they have to be in the same security mode. But okay then we include then without S2 security.


Then I noticed that not all new devices supports S0 security. So one device includes with no security and the other with S0. Fibaro doesn't except no security level anymore if S0 is available.

So you can still not make associations with devices. This makes the association function very limited. Especially the association function is a verry good feature of the Z-wave devices.

I tried to create an association with the output of a Qubino On/Off thermostat 2 to a Fibaro Wall plug.

Edited by 10i-
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that's right, due to certification reqs. you can't mix anymore (even if Fibaro added in some their devices support for associations without security when device has been included with).


Sometimes (this is actually not working for every device/firmware combination) one can include S2 device with wrong DSK, just enter 00000 and wait. The device with switch to compatibiity (should be normally S0), and with some luck will get included with NS, so you can use associations then with others NS devices. Note: this does not work for S2AC devices! 


For devices that support only S0 and NS this will not work either, so you have to use the slow S0. 


That said, when you have to control from S2/S0/NS a NS device, try 00000 trick, when you have to control S0 device, don't select S2.

Edited by tinman
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