Smart home setup:
- Hubitat Elevation C-7 hub running 126.96.36.199
- Qty 41. Total Z-wave devices paired
- Qty 3. S2 Access Control
- Qty 1. S0
- Qty 28. S2 Authenticated
- Qty 9. None
I have the Hub Watchdog app installed with two child instances, one monitoring a Z-wave smart plug-in switch and another monitoring a Zigbee smart plug-in switch. App is set to run every 3 hours and log the response times for Z-wave and Zigbee. This basically gives me an idea of how fast my wireless mesh is responding for both wireless protocols.
What are the S2 Authenticated devices?
They are half Ring Contact Sensors 2nd Gen (doors and windows) and half GE/Enbrighten smart in-wall switches/dimmers/fan controls. All of these devices at the time of inclusion prompt to include with S2 authenticated/unauthenticated. When I first installed these devices I took the early advice I read which was "don't touch the checkboxes in the include dialog and just hit ok".
Why did I second guess my S2 Authenticated include choices?
The Hub Watchdog app has been reporting my Z-wave mesh had a median average delay of 550ms or more. There was also regular jumps to 750-800ms and sometimes weird spikes to 8-10 seconds. I have noticed at times some noticeable delay in automations firing and controlling Z-wave in-wall light switches which I contributed to these Z-wave network delays.
What did I change?
In batches of about 6 per day I went around and excluded each of the S2 Authenticated devices and included again, this time unchecking all the dialog boxes at prompt. This transitioned devices from "S2 Authenticated" to "None". I also worked my way from the hub out into the rest of the house.
Once finished with transitioning all devices to "None" the Hub Watchdog app is now telling me my median delay is down to 380ms and very rarely I see spikes above 500ms. No more weird 8-10 second delays appearing so far, knock on wood. More importantly I can tell a noticeable difference in the responsiveness of automations controlling the Z-wave devices.
You may ask, what about that single S0 device? That is a older Z-wave only Schlage door lock that is getting replaced this month. It will join the other three Schlage door locks as S2 Access Control here soon.