How many Hub’s I can add in one location?

[JDRoberts]

What country is the hotel in? There are many different code requirements for hotel lighting.

Anyway, as @tgauchat mentioned, the SmartThings cloud can send bad commands to the switch, causing the lights to randomly turn on or off. Multiple forum reports on this.

Lights Randomly Turn On

Hi All, I had a weird thing happen last night and it freaked my wife out a bit. I have multiple z-wave dimmers around the house all connected to a SmartThings 2.0 Linear WD500Z Z-Wave Dimmers. I have been using them all pretty much without issue for the past few months (I recently upgraded to Smarthings 2.0 from version 1.0) Last night, randomly at 4am our master bed lights turned on FULL Bright, I got up, turned them off At 5:46am they turned on again full bright so i had to turn them off (I looked at my smarthings activity log to confirm the times) No-one else in the house, My wife and I were sleeping. usually when you have the dimmers setup, if they are turned on they go back to the last bright % you had them on. When we go to bed we set them pretty low (30-40%) so when we tur…

Note this one from a few months ago is specifically about switches, not smart bulbs:

Lights randomly turn on and off, usually the same ones

In the last few weeks, I have had Z-Wave light switches, and Zigbee smart plugs turn off and others turn on randomly. Usually only at night, and around the same time. No I have no automatons or pistons that have these devices included. Also it doesn’t happen at the same time or day. Anyone have any ideas about this? I just rebooted my hub V2, just to clear the cobwebs.

And a whole separate set of reports on rules with “sunset” as a trigger not firing correctly. Again, including recent ones.

SmartLighting ignoring time constraints? (Feb 1 2018)

Anyone else seeing where their automations are ignoring the time constraint? My kitchen lights are split into 2 automations. One for daylight hours, then another for after sunset. My All Day automation is firing despite being set to only run Sunrise to Sunset - 60. Just started happening today. Don’t know what point during the day but first noticed around 7pm central. Affected multiple of my time constrained automations, but not all. I have went through all my automations and hit save on them again to force an update and no change. Went into the api and hit update on the weather station and its firing options look normal to what I think I remember normal is. Hate to say its because the firmware update since obv its an automation not the hub…but something backend?

It’s not about whether a switch on the wall will still turn the lights on and off. It’s about whether an automated rule unexpectedly fails, either because lights turn on when they shouldn’t or, worse for a hotel, because they turn off when they shouldn’t, such as when a guest (who may not even have access to the switch and definitely doesn’t know where it is) is halfway down an unfamiliar hallway.

The following FAQ details the points of vulnerability.

How to: Planning for Outages