Hub disconnecting and reconnecting every few minutes

It’s been happening for two days now. Just wondering why and how do I fix this?

Most odd hub disconnects come from network weirdness in some way. You wifi, local networks, your connection to the Internet, your ISPs network, thier connection to the backbone etc. Etc.

Anything change in your local network recently?

Indeed I did change the modem. The ISP required me to. The router is the same. How would I resolve this case? I’m hoping I can do it remotely as I have a guest there who isn’t good at technology and I don’t want to bother her.

You have a router behind an ISP provided Cable modem? What model cable modem?

The cleanest setup in that case is to put the ISP device in whats known as ‘bridge mode’. It basically bypasses all the residential gateway firewall and Network Address Translation (NAT) in the cable modem. If its a new modem and the tech did defaults. Its all active and you have a double NAT going on one from your router and another from the cable modem. Its not the end of the world and works fine in most circumstances… But not ideal abd can cause issues in some cases. (Xbox online gaming for one…)

Doing bridge mode will help isolate the modem or at least the most complex parts of it at least as part of the troubleshooting chain.

When not to bridge when you have your own router - you have other unprotected devices directly connected to the modem not behind any other firewall… Otherwise. No good reason not to… While you’re in there if you arent using the ISPs Wi-Fi turn it off. That’s just one more wifi radio competing for space in an already cramped RF range…

The other thing you can do is if your hub is wireless move to wired ethernet. Brief wifi drops can exhibit as this.

I’m not sure the model as it’s a model Spectrum sent out. I bet there’s a model number on it somewhere but with an Airbnb guest in there, I don’t want to have that person do it.
I wonder how I could put it in bridge mode remotely. I think you’d have to be on that network right? I am across the country.

spectrum modem 1
spectrum modem 2

Oooh yeah that’s gonna be rough. I can’t tell from the picture but that LOOKS like an Arris cable modem - residential gateway - but they have so many models I cant pick it out.

It’s possible if you have remote access to the network - like an active PC inside the network, for instance - but I wouldn’t, you will want to be there - there is a high likelihood the operation at least temporarily knocks out connectivity.

What about the ST hub -is it using a hardwired network or is it WiFi?

If you have a way to get someone to hardwire the

Hmm. I believe its wireless. It’s been awhile since I checked since it’s locked inside a cabinet. But I guess worse case scenario, I turn off my phone notifications and the hub keeps going on and off every 7-8 minutes and I can use it when it turns back on, right? Any other problems can come out of this?

Honestly - I can’t tell you what else could happen - but your hub is probably not very happy at the moment and I wouldn’t consider it reliable at all until that stops.

That is a Ubee modem provided by Spectrum. Model # EU2251

One note: contact ST support and let them take a look to see if they are able to provide more insight into the issue :slight_smile:

But I agree with @nathancu on an issue with your network

One thing to consider… replace any ethernet cables

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Ew… THAT one? It’s notorious for dropping. And you can’t get into the admin interface - well so much for setting bridge mode.

Ok go for wired ethernet connection if possible, I guess. But I’m almost positive this is related to that modem swap at this point.

Ew… THAT one? It’s notorious for dropping. And you can’t get into the admin interface - well so much for setting bridge mode.

Yikes. Well there’s gotta be something else that can be done…

One note: contact ST support and let them take a look to see if they are able to provide more insight into the issue :slight_smile:

This is what I got when trying to reach out through chat.

As we previously announced on March 1st, SmartThings is ending support of its legacy hardware – ADT SmartThings Home Security and Safety system, SmartThings Hub (2013), and SmartThings Link for NVIDIA® SHIELD™.

For any customers who have not yet completed their online requests to determine if they are eligible for a partial or full refund, we ask that you visit www.SamsungCSO.com.

Once again, impacted hardware will stop functioning as of June 1st, 2021, for ADT customers, and June 30th, 2021, for SmartThings Hub (2013) and SmartThings for NVIDIA® SHIELD™ customers.

Other Resources

For additional SmartThings ADT Security Panel FAQs please visit:

For SmartThings ADT Security panel Reset instructions:

For SmartThings Nvidia Link reset instructions:

Can you clarify which hub you have? That is a rather odd response.

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I didn’t even specify to them which hub

There’s no option in chat to select smart things. Maybe they discontinued support like they said?

No that’s GOT TO BE an autoresponse - a lot of people (users with V.1, NVidia shield, or ADT hubs) are dealing with the retirement of their hub right now and I’m sure support is getting HAMMERED with requests. If you don’t have one of those hubs - ignore the message. That’s not your issue. I’d still push to see what ST support sees in their logs for your hub.

Also - Spectrum has a way to see your Cable modem status in your account (They’re my ISP too) How is it reporting?

I plan on dumping Spectrum at the end of the year. My bill shows a massive price increase and before that occurs I will switch and say adios.

I had the hardest time getting a higher speed from tHem. THey advertised a starting speed but every time I called, they said it was not a available in my area even though their site clearly showed it was. I finally went to one of their stores and was tOld it was available but I needed a newer modem. Received the modem last fall but still got the same low speed. I must have called 20 times and kept getting tHe same response that it must be my router and not their modem which I did not believe. Finally my own router died and I got a new one but still got the same low speed. I called 10 times over a one week period. Finally got a technician, who goes “hmmmmmm - I see the problem” he made a change and presto - I got the high speed I had been lookin for.

Sorry to go off topic… my rant on spectrum.

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Spectrum has a way to see your Cable modem status in your account (They’re my ISP too) How is it reporting?

Since I’m not there, I can’t say but the guest hasn’t had problems since the modem swap that I’ve heard. She is a complainer so if the slightest thing goes wrong, I’d hear about it.

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