What happens with the sensors? Do you get a false positive?
I’m traveling and i will install a powerful siren controlled by a z-wave switch and triggered by a motion sensor.
In my neighborhood,Power Outage is normal once or twice a month, so i don’t want to trigger the alarm just because the power outage while i’m away.
Based on your experience, after a power outage;
How does the motion sensor behave? How does the light switches behave? Or any other smart device
Not true, unless you didn’t put batteries in the SmartThings hub. That’s why it has batteries. It will run for about ten hours just on battery, and during that time it will continue to receive notifications from the battery powered sensors.
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Are you sure? I have the V2 hub and it definitely misses ST Multi events during power down (gets stuck in the opposite state till next event occurs).
Just did another test to be certain and this is what happens for me.
Maybe my batteries are dead then… Will check!
As long as you using a device type handler which is eligible to run locally, then yes, I’m sure.
Of course, what the hub does with the sensor report is a different question. But if you have a smart lighting automation which does nothing except turn on a locally eligible light switch when the locally eligible sensor reports to the hub then, yes, that should continue to work during a power outage.
The app is going to get out of sync with the actual device states if there is a power outage. This is because the hub cannot talk to the mobile app except through the cloud. There’s no way around that at the present time.
I think, but I’m not 100% sure, that if after Power and Internet are restored you then took the hub off power all together (including taking out the batteries) and left it off for about 15 minutes and then put it back on power that it will re-sync with the cloud which should then update the app. Which might be easier than going around the house and re-triggering every sensor you have.
I thought the local processing will still work only if you lost Internet. The battery is just for easy pairing of new devices and won’t do any automation with just battery. I would also like to know about this. I have the same test result as @anon36505037.