Issues here too! Rock solid for 10 months since I got the system. As of 2 days ago when I put 2 new GE switches in NONE of my Leviton Dimmers work but my Leviton switches do. They show as connected and receive the command but nothing happens.
I also get the device unavailable on certain devices randomly but they operate normally still.
Frustrating…
And there is nothing we can do? Seems like I have to start calling the Sparky to bypass my water heater switches … 
Personally I’m not having any issues at the moment, touch wood, but have you tried turning device health off?
Just a thought as other people have suggested that this improves things.
Yes, turning Device Health off, removes the Red Exclamation Points, but the devices still don’t respond.
I have tried the following:
Current symptoms: I have lost control of the Aeon Heavy Duty Switches; Some of the Fibaro Single Switches; Some of the Fibaro Double switches; One Harmony Hub; 2 of the 4 Aeon Smart Wall Outlets. Funny thing is, some of the dead devices are located within 5m from the hub - others are at the other end of the home. In between, there are many devices working fine. A wide variety of devices in other words.
I did all of the above a second time, and I have most of my devices back online. Still missing 1 or 2 though.
I’m turning off device health as some of my Z-Wave devices are continuously showing off-line and causing problems. Hopefully it helps.
After you turn off device health, try doing a Z wave replace on any individual Z wave device which is still having problems.
This utility is intended to let you replace a broken device with a new one of the same make and model so you don’t have to update any of your smart apps.
But it can also be used to “replace” a zwave device with itself when it has lost connection with the network.
It’s tedious, because you have to do one device at a time and you have to physically manipulate the device to re-include it, but it does preserve all of your existing automations, so It can save you some work in the long run.
I’ve had a lot of Z wave instability lately. Turning off device health has helped immensely.
Z wave repair never helped, and seemed to make things worse, with new devices dropping off each time.
To get everything responding again, I had to go to each device and turn it on/off or trigger it (motion, open/close, etc.).
Eventually everything came back and things are working well now. How can a device health monitor impact performance? It shouldn’t even be related!
I’m have similar issues to you and it sounds like I’ve got some similar products too. When my system started going haywire I lost 1 of 2 garage door controllers (I’ve got the GoControl ones) it took me some time but I finally got it reconnected. Like you ST would just not find it to re-add it, it sounds like you can’t pair it because it may still think it’s paired with a device. Here’s what I did and it worked for me so YMMV. I tried the IOS app to exclude the device and it didn’t seem to do anything. So I pulled out the laptop and while standing on my ladder in the garage balancing a laptop I put the hub in exclusion mode. I got the little box below it that says it’s in exclusion mode for 15 seconds and pushed the button on the side of the controller again. This time it beeped and I waited another 10-15 seconds. I opened the app on my phone and clicked add an item them pressed the button briefly on the controller. It beeped again and ST found it immediately.
Using the exclusion mode on the phone and then re-adding it via the phone produced no results and it never even beeped. The exclusion mode from the website seemed to work for some reason. Worth a shot at bare minimum. Good luck.
What I am doing is moving away from SmartThings. No more cloud based for me. I have a high level of technical ability so I am going over to OpenHAB and bringing my Zwave with me. All the zigbee and my Hub2 will be sold on ebay at a fire sale price.
Smart things is unreliable. Even today I am getting door open notifications from this morning, and I’ts 1pm. I have a very healthy zigbee mesh and a Zwave mesh working … bot both Zwave and Zigbee sensors have huge delays unless I reboot the hub. then it works great and then slowly gets bad again.
All this started right after the last update, which is typical with smart Things. their updates break more than they fix.
Issue fixed. Had to exclude and readd.
So…
i’m in bed at 5:30 AM today, and the garage door opens and my phone dings… apparently “I just arrived” home LOL.
So… Solution is to ditch the phone as a presence sensor and purchase a smartthings sensor and just for today at 20% off.
It seemed to be working fine for weeks, then all of a sudden…
So why even have the choice to utilise the phone as a sensor if you are saying its not predictable??
I personally use my phone as a presence sensor with few problems, but I don’t have anything automatically open or unlock doors based on my presence. The closest thing I do is disarm SHM. I have a keyfob that I use to unlock the door before I get to it.
One thing I looked at doing was using the Wireless Sensor Tags as a backup presence device. Basically, the garage door or front door would only unlock automatically if both sensors showed present. I use a virtual presence sensor and a CoRE piston that adjusts based on the presence of both devices. Then I only use that virtual presence sensor in other automations. The problem I ran into was the stability of the tags, not the phone. You’re also adding another layer which makes it a little less dependable.
One thing I’ve proposed to ST is an auto presence sensor. Basically, something low power that runs off car battery power, has Z-Wave and/or wi-fi, and works as a presence sensor. That way you could, if you have multiple garage doors, have it automatically open the correct door based on which vehicle pulls up. It would also be useful in my example as a backup presence sensor.
It just depends on local conditions. Some people find the phone works better than the presence sensor fob at their house, other people find the opposite is true.
Many of us use a combination of two devices to improve reliability.
Most people start by trying the official SmartThings mobile app just because you already have it. But if it doesn’t work for you there a number of other options you can try.
I was getting a lot of the offline red exclamation points for a while recently. What I have done to completely correct them is to install Pollster and add the devices as they go offline. I have about 6 devices that were going offline consistently and after setting pollster to poll and refresh them they have not dropped offline once.
It is kind of frustrating that we have to use third party tools for basic functions like this, but at least we have the ability to use them. Unlike many other locked down smart home hubs.
Here is the link to pollster for anyone that needs it.
And unfortunately, this adds more stress on the cloud and could contribute to other issues.
I’m on the verge of giving up. For the past 2 weeks, my life has been ruled and complicated by tech that is supposed to make things easier.
My setup is getting worse by the day. Initially, I could bring the devices back online by rebooting the hub, but that does not even help anymore. I’m down to only being able to (apart from the Hue lights, which work ok) control a few items, mostly Samsung devices like the outlet switch. There is no connection to about a third of the Fibaro and Aeon devices and even those showing as connected in the ST app, don’t respond. If I turn device health on, it shows 22 devices as offline. Even devices like door closure sensors and Aeon’s multi-sensors show as disconnected.
I’ve spent many hours on this forum looking for answers, and I’m sure I’ve tried all - nothing helped. I even changed my internet router to a different service to see if the problem is not related to my internet connection.
I’ve even paused almost all of my webCore pistons in case they might be causing excessive traffic on the network.
No idea what to do next apart from calling this project a fail and going back to manual control. Words can’t describe my disappointment, as I went all out and spent crazy amounts of money on this project - even put Z-wave valves in my water supply line! I’ve already spent far more time getting my home setup than what I have available. And I, unfortunately, don’t have the time to start all over with something like Openhab.
I wanted to do this years ago but waited till I thought by now the system should be stable. To me, it feels like everything is barely beta quality. Looking at the history of the ST app should have made me realise that I’m looking for trouble. The system reminds me of the first Android phone - actually, they were a lot more stable than this system.
I’m sorry for blowing off steam like this - I realise is is annoying to read. I’m just, so disappointed that I have a dysfunctional system after spending so much time and money on what I had thought was going to be an awesome system.
@Nhaley pointed out that I should look in the Hub’s Event List to see what’s happening when I run a network repair. This is kind of a revelation, because looking at the HUB, I see that I have a few “ghost” devices which I’ll have to remove as explained by @ahndee.
But I suppose, just as important, I have heaps of the Err 101 errors discussed here.
Just a small portion of the Hub’s Log:
2017-06-18 1:43:48.381 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:48.381 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:48.380 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:48.378 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:48.058 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:45.235 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:45.230 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:45.227 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:45.227 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:45.225 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:42.045 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:42.045 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:42.044 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:42.043 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:42.040 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:39.194 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:39.193 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:39.192 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:39.191 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:39.191 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:36.298 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:36.289 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:36.289 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:36.284 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:36.284 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:33.108 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not responding
2017-06-18 1:43:33.107 PM SAST
3 hours ago HUB Err 101: ZW module not respon... Err 101: ZW module not respondingHere’s a weird but possibly useful suggestion:
Switch to a V1 Hub!
I don’t know what the heck is going on with the sudden flurry of Z-Wave issues, but I presume that it is something specific to the firmware and/or Z-Wave “plus” support in Hub V2.
While there are lots of variables in play, my Z-Wave devices (on a Hub V1, forever) have no issues.
When I have time, I’ll check whether the devices going offline all the time, are included in secure mode and report back if I was able to determine a pattern in this regard.