Technician helping fix Tuya not discovering devices in Smart Life app

Steve H.

Expert ★★★★★ 27,853 satisfied customers

Specialities: Robot vacuum docking loops, charging contacts, dirty sensors, map confusion after updates, no-go zones, scheduled cleaning behavior.

Common reasons a robot vacuum docks, then starts moving again, and the safest things to check first

Technician avatar Technician
Let’s not rush into resets. When a robot vacuum returns to the dock and then leaves again, the cause is often smaller than it looks.

I want to start with the safest checks first so we do not make the map or schedule harder to sort out later.

Did this begin recently, or has it always behaved this way?
Customer
It started this week. It goes back to the base like it is done, stays there for a moment, and then rolls out again.
Technician avatar Technician
That timing helps. Before it started, did anything change around it? For example: a software update, moving the charging dock, a new rug, furniture moved, or a schedule added in the app.

This pattern is common after small changes, but we should rule out the simple risks first.
Customer
I did move the dock a little, and I think the app updated too. I am not sure about the schedule.
Technician avatar Technician
That gives us two realistic possibilities already: the robot may think the docking position is not quite right, or the app may still be telling it to continue a task.

Quick safe check: when it leaves the base again, does it say anything in the app such as “resuming cleaning,” “repositioning,” or “returning to charge”?
Customer
Sometimes it says resuming cleaning. Other times it just starts moving and I do not see much.
Technician avatar Technician
“Resuming cleaning” matters. It can mean the machine believes the job was paused for charging and not actually finished.

I do not want you to try anything that could make it worse, especially if the app has a saved map. Let’s keep this to observation first.

Does the battery look low when it docks, or is it already fairly charged when this happens?
Customer
The battery is not empty. One time it was around 60 percent and still went back out.
Technician avatar Technician
That makes a charging emergency less likely. At that point I would think more about unfinished-room logic, a repeated schedule, or the dock not being recognized cleanly.

Another safe question: is the robot fully seated on the charging contacts, or does it seem to bump, back away, and correct itself before leaving again?
Customer
It does a little wiggle on the dock sometimes. Then it sits for a bit and later leaves.
Technician avatar Technician
That is useful. A small docking misalignment can make the vacuum behave as if it reached home but did not fully settle there. Dirty contacts, a slight tilt, or the base sitting too close to an object can all confuse that handoff.

Let’s check this safely first: has anything collected around the dock area lately, like dust, pet hair, or a mat under the base?
Customer
There is a thin mat under the dock now. I added it so it would not slide.
Technician avatar Technician
That could absolutely matter. Even a thin mat can slightly change how the base sits or how the robot lines itself up.

I am not saying that is the only cause, but it belongs near the top of the list together with saved routines and map confusion after an update.
Customer
I also checked the app just now. There is a schedule, but it is only once in the morning. This weird leaving again happens in the evening too.
Technician avatar Technician
Good check. That makes a simple repeated timer less likely.

The next thing I would want to rule out is whether the robot thinks it has an incomplete area left to finish. That can happen if the map shifted slightly, if a room was blocked earlier, or if the dock was moved without the app fully catching up.
Customer
That sounds possible. It started after I moved a chair and the dock to clean behind them.
Technician avatar Technician
That lines up very well with what you are seeing. A moved dock plus a slightly changed room layout can make the vacuum “finish,” dock, then decide it still has a path to complete.

Trust moment: I would avoid deleting the map right away. That is usually not the first thing to do unless the safer checks fail.
Customer
I am glad you said that because I was about to wipe everything and start over.
Technician avatar Technician
I would hold off for now. The safer path is to confirm whether this is a dock-position issue, a contact issue, or the robot trying to continue a saved cleaning task.

If the contacts are clean, the base is level, and the app still shows “resume” behavior after the dock was moved back to a clear spot, then the map logic becomes a stronger suspect.
Customer
That makes sense. So it may not be broken at all?
Technician avatar Technician
Correct. From what you described, this still sounds more like behavior the robot is choosing for a reason than a failed motor or dead battery.

The strongest clues are: it started after changes in the room, it sometimes says it is resuming, and it can sit on the dock before leaving again.
Customer
Okay. I can check the dock position, the contacts, and what the app says before I do anything drastic.
Technician avatar Technician
Exactly. Keep the checks simple and one at a time. A calm comparison tells you more than a full reset done out of frustration.

If it still docks and heads back out after those safe checks, then you would look more closely at map history, room boundaries, and whether a recent firmware change altered cleaning logic.

Quick answer: the accepted fix

Accepted first checks for a robot vacuum that returns to base and then leaves again are: confirm the dock is level and has clear space around it; inspect and gently clean the charging contacts and nearby sensors; review the app for a paused or unfinished cleaning task rather than assuming the cycle ended; and compare recent changes such as a moved dock, updated map, new furniture, or fresh firmware. If the behavior started suddenly, rule out those safe possibilities before deleting maps or doing a factory reset.

Why a robot vacuum can look finished but still leave the dock

5 GHz Wi-Fi often has higher speed, but it also has a shorter range and can be more sensitive to walls, TV cabinets, and nearby interference. New routers may also use DFS channels or wide channel widths (like 160 MHz) that work great for some devices but cause dropouts for others. If your network uses one Wi-Fi name for both bands, band steering can move a streaming device at the wrong time and trigger a “not connected” message. That’s why a simple compare test on 2.4 GHz is a useful diagnostic, not a step backward.

What to check before assuming a hardware fault

Don’t judge by a one-minute test. A device can appear fine, then go offline during a longer video session when the connection is under steady load. After any single change, stream for a while and watch whether the device stays present in the router’s connected-devices list. If it drops and reconnects repeatedly, note whether the router changed channels or the device switched bands. This kind of observation keeps you from chasing the wrong cause.

Robot vacuum returns to base then leaves again — quick troubleshooting tips

Start with safe checks that isolate the cause before changing advanced settings.

Helpful checks: compare 2.4 GHz vs 5 GHz stability, look for WPA3-only security, and note if 5 GHz is using auto/DFS channels or very wide channel widths. If your router combines both bands under one name, consider whether band steering is moving the device mid-stream. Make one small change at a time and give it enough time to observe. If you’re unsure, stop and take notes — guessing can make the network harder to troubleshoot.

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 robot vacuum start returning to base and leaving again suddenly?

This often starts after the dock is moved, the room layout changes, or the app installs an update. The robot may think a task is unfinished or may not settle correctly on the dock. It does not always mean the machine is damaged.

Did this happen after an update or map change?

It can. A saved map, room boundary, or cleaning history can become slightly out of sync after changes in the home or software. That can make the vacuum act like it still has somewhere to go.

Is this a charging problem or a settings issue?

Either is possible, and the clues matter. If the robot wiggles on the dock, leaves after a short pause, or shows “resume” in the app, the cause may be contact alignment, dock placement, or cleaning logic. A low battery is only one possibility.

Can this be checked safely at home?

Yes. Start with simple checks like dock position, clear space, clean contacts, and what the app says when the robot leaves again. Avoid deleting maps or doing a factory reset until those safer checks are ruled out.

Sources

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