Technician helping fix Tuya not discovering devices in Smart Life app

Steve H.

Expert ★★★★★ 27,853 satisfied customers

Specialities: Smart device reconnect issues after outages, Wi-Fi recovery checks, app re-setup loops, router restart side effects, device memory and pairing state diagnostics.

Why a smart device may ask to be set up again after a power outage and what to check first

Technician avatar Technician
After a power outage, a smart device can come back online in a strange state. Sometimes the app loses trust in the old connection and shows it like a new setup, even when the device itself is not fully reset.

Let’s start with the safest checks first. I don’t want you removing the device from the app or factory-resetting it before we know whether the problem is the device, the router, or the saved pairing state.

What kind of smart device is it, and did the outage affect only that device or several smart devices in the home?
Customer
It’s a smart plug. After the outage, the app says it needs to be set up again. A few other devices came back, but this one did not.
Technician avatar Technician
That difference matters. If some smart devices recovered and one did not, I would not assume the whole Wi-Fi network is the only cause.

A few things can happen after power returns:
• the router comes back with a slightly different timing or channel
• the smart plug boots before Wi-Fi is fully ready
• the device falls into pairing mode or a half-connected state

Before touching setup, does the plug show any blinking light or pattern right now?
Customer
Yes, it has been blinking pretty slowly. That’s why I thought it wanted to be set up from scratch.
Technician avatar Technician
It may look that way, but a blinking light after an outage does not always mean a full reset happened. Sometimes the device is only advertising for reconnection because it could not rejoin the saved network fast enough.

Trust moment: I don’t want you to assume “needs setup again” means the old pairing is gone forever. In some cases the app is reacting to a temporary recovery problem, not a wiped device.
Customer
That would be good, because I really don’t want to redo all the scenes connected to it.
Technician avatar Technician
That is exactly why it is worth diagnosing calmly first. If the device still has its old identity but just cannot rejoin the network, removing it too early can create extra cleanup later.

Let me narrow the risk a little:
• did your Wi-Fi name or password change during or after the outage?
• did the router restart more than once?
• is this a 2.4 GHz-only device, like many smart plugs and bulbs?
Customer
The Wi-Fi name and password stayed the same. The router definitely restarted a couple of times. And yes, I think this plug only works on 2.4 GHz.
Technician avatar Technician
That fits a very common pattern. After a power outage, 2.4 GHz smart devices can miss the window when the router becomes fully stable, especially if the router reboots more than once or brings bands back in stages.

This is common after outages, but we should rule out risks before doing anything drastic. I would also want to know whether the app still shows the old device entry, or if it only shows an option to add a new one.
Customer
The old device is still there, but it shows offline. Then there’s also a prompt that says I should set it up.
Technician avatar Technician
That is a very important clue. When the old entry is still present, it often means the app remembers the device, but the device has not successfully rejoined under that saved relationship.

In other words, the app may be offering setup as a recovery path, not because it knows the device was completely erased.

Let’s check this safely first: is the plug physically still working as a plug, or is it unresponsive even at the button?
Customer
The button still clicks and the plug turns on and off manually. It’s just not connected in the app anymore.
Technician avatar Technician
That is reassuring. It points away from a dead device and toward a lost network session, pairing mode, or app-side mismatch after the outage.

There are a few realistic possibilities now:
• the plug kept power but lost Wi-Fi credentials in memory
• the plug still has credentials but cannot negotiate with the router as it came back
• the app sees the device as offline and is pushing a new setup even though the old entry still matters
Customer
Could the outage really make it forget the Wi-Fi like that?
Technician avatar Technician
It can, but not always in a simple “memory erased” way. Sometimes the device ends up in a confused state after unstable power, where it behaves like it needs pairing even though the saved details are only partly lost or no longer accepted by the router.

I don’t want you to try something that could make it worse, especially if there are scenes and routines attached. The safest goal first is to tell whether the device lost identity, lost Wi-Fi, or only lost trust with the app.
Customer
That sounds like what happened. It feels half-alive, not fully dead and not fully connected.
Technician avatar Technician
That is a good way to describe it. In cases like this, the best early clues are the light pattern, whether the old device entry still exists, whether manual control still works, and whether other 2.4 GHz devices also had trouble recovering after the outage.

From everything you’ve said, this looks more like a recovery-state problem than a total failure. That means you have a better chance of preserving the old setup if you move carefully instead of treating it like a brand-new device right away.

Quick answer: the accepted fix

Accepted first checks after a power outage when a smart device wants to be set up again: confirm whether the old device entry is still present in the app, because that often means the relationship was not fully erased. Compare the device’s light behavior, manual button response, and whether other 2.4 GHz devices recovered normally, since that helps separate a real reset from a failed reconnect. Treat the outage as a possible recovery-state problem before assuming the device must be added as new. Avoid deleting the old entry too early if scenes, routines, or room assignments depend on it.

Why a power outage can leave a smart device in a half-connected state

When power returns unevenly, the smart device and the router do not always recover in the same order. A plug, bulb, or camera may boot before Wi-Fi is fully ready, fail its first reconnect attempt, and then sit in a pairing-like state. The app may interpret that as a setup issue even though the device was never intentionally removed. That is why the problem can look more serious than it really is.

How to tell whether the device really reset or just lost its connection

The most useful clues are whether the old device entry still exists, whether the device can still be controlled manually, and whether the light pattern looks like pairing or simple reconnect trouble. If the app still remembers the device but shows it offline, that usually points to a broken reconnect path rather than a clean factory reset. This distinction matters because scenes and automations may still be tied to the original entry.

Smart device wants setup again after outage — safe checks first

Start by deciding whether the outage caused a real reset or only a failed reconnect.

Helpful checks include looking for the old offline device entry, checking whether the device still works physically, and noticing if other 2.4 GHz smart devices also struggled after power returned. A blinking light can mean pairing mode, but it can also mean the device simply could not rejoin the network cleanly. Taking a moment to compare those clues can help you avoid unnecessary cleanup later.

Disclaimer: This information is AI-generated and intended for general guidance only. Do not open devices or attempt unsafe electrical work. For advice specific to your Tuya/Smart Life device model and router settings, please consult a verified expert on Whizz-Tech or the manufacturer’s support before making decisions.

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FAQ

Why did my smart device ask to be set up again after a power outage?

This can happen when the device and router recover at different times. The device may fail to rejoin Wi-Fi and start acting like it needs pairing again. That does not always mean it was fully reset.

Did the outage erase my device settings?

Sometimes, but not always. Many cases are really failed reconnect problems, not total memory loss. If the old device entry is still in the app, that is often a useful sign.

Is this a router problem or a device problem?

It can be either. If other smart devices recovered but one stayed offline, the device may be stuck in a recovery state. If several 2.4 GHz devices struggled, the router restart pattern may be part of the problem.

Can this be checked safely at home?

Yes. Start with the light pattern, the old app entry, and whether manual control still works. Avoid deleting the device too early if it is still linked to scenes or automations.

Sources

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