Do I have a bad hub?

I've posted about this before but after 1 month of using a new C-7 from Amazon I'm about to throw in the towel. I have the simplest setup, just 4 Leviton Z-Wave plug-in dimmers and a "On at 5pm" rule and an "Off at 1am" rule. I have the Alexa Echo skill and the Hue Bridge apps installed.
Normally it works fine, but every 3 days or so the hub becomes completely unresponsive, doesn't trigger anything and can't be connected to, or even pinged on the network. It has a static IP assigned by my DHCP server & is on wired ethernet, other things plugged into the same gigabit switch work. The green light is on, but the only way to revive it is a power cycle. The logs show nothing, just an absence of entries since the last rule executed.

Could I have a defective hub? Its just too unreliable to use right now, My now retired Wink hub would stay up for months (company outages excepted)

That isn't normal. I don't think there is evidence to suggest a bad hub from what you have said. You more likely have either an app or device crashing the hub.

I would start with some simple things. Could you post a screenshot of your Z-wave details page for us please? (include all columns and rows)

If you go to Logs, there aren't any errors or warnings if you go to past logs?

While you are in Logs tab, go over to App Stats, and Device Stats. On those pages, there is a App Settings/Device Settings near the top left of the page. Click into that and enable all options. Once you have done that, see if there is any one app or device that is using excessive time compared to everything else. You can even post screenshots of these stats if you aren't sure if something is normal or not.

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First suspect given your description is that you may a have a ghost or incomplete device pairing. Could you post a screen shot(s) of your ZWave Details page?

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What did you fix after the last time you posted? I'm sure there was advice, because this community loves helping out. But I suspect you're going to get the same advice unless we know what you did try and your conclusion of those efforts. :slight_smile:

In other words, you may have more than a single issue and the advice followed last time may have 'peeled one layer of the onion'.

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Were you able to get anywhere with the severe CPU load messages?

If that's still going on, then that's likely the culprit.

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On the Device Stats, one dimmer seems to take more time and has a different Device Class, it may be one of the newer Z-Wave Plus units. It's about 5 feet from the hub

On the App Stats tab, the Echo skill seems to take the most time:

Your app stats are just fine. Less than 14s of busy time in 17 hours of uptime.

  1. Could you post the device stats?
  2. Can you post a list of all the apps you are currently using on the hub?
  3. Is that z-wave table complete? Are there any additional devices on there that aren't shown in the screenshot?

The z-wave table is a little puzzling. 0x0A has a worse signal than 0x0C; yet, the hub is communicating with 0x0C through 0x0A and 0x0D.

Can you try unpowering 0x0A and 0x0D, and then running a repair on just node 0x0C?

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These are all supposedly the same devices? If you look at the back of the device, is there a Z-wave or Z-wave plus symbol and/or a model number on there that you could see if they are indeed the same identical device?

Leviton is known for doing some weird stuff with similar model numbers, so it would be nice to verify what you really have.

Please post the exact model of each of these.

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Giving the size of your system it is possible that you are dealing with a hardware malfunction of some sort. If you could send me a private message I would be glad to further assist.

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The Den Small Light module is a newer Z-Wave Plus unit, the others are older non-Plus units I've used for years with Wink. They all work

Thanks everyone, based on your feedback I'm thinking that perhaps my problems lie with the older pre Z-Wave Plus Leviton modules that I'm using. I think I may retire those and get something more current and see how that affects my reliability

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Did you contact Hubitat Support Services, when @bobbyD asked you to PM him? He could confirm or eliminate the possibility of a hardware malfunction.

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