A scheduled smart plug can add timed safety to an auto top-off system. It does not replace visual checks: test at least one complete cycle after every change.
Before you start
Always test a complete cycle.
After every schedule change, verify at least one complete ATO operating cycle.
Download Tuya Smart
Prepare the app before pairing.
Install Tuya Smart on your phone, then create or open your account.
Download the official app from your mobile app store.
Pair the smart plug
Connect it to the app.
Plug it in
Wait for it to power on.
Enter pairing mode
If the LED is not flashing quickly, hold the button for about 8 seconds.
Add the device
In Tuya Smart, tap + and follow the wizard using your 2.4 GHz Wi-Fi.
Tuya Smart setup
Video reference for first setup.
Scheduling for an auto top-off
Method based on actual evaporation.
Install the auto top-off
Bring the water to the desired level.
Unplug the auto top-off for 6 hours
This lets you estimate actual evaporation.
Time the refill
Reconnect the auto top-off and measure how long it takes to return to the correct level.
Program the smart plug
Every 6 hours, leave the plug ON for about 2× the measured time.
Example
If topping off takes 1 minute, program 2 minutes ON: 08:00–08:02, 14:00–14:02, 20:00–20:02, 02:00–02:02.
Quick troubleshooting
Simple checks before contacting support.
The plug will not add
Reset it with a long press, move it closer to the router and check that Wi-Fi is 2.4 GHz.
What should I do after a water change?
Top off manually, then resume the normal schedule.
Checklist before use
Quick validation.
Check
- App installed.
- Plug flashing quickly.
- 2.4 GHz Wi-Fi used.
- ON/OFF times tested.
- ON duration calibrated to actual evaporation.
Avoid
- Leaving the plug ON permanently if you are using it as an additional safety layer.
- Programming without timing the refill.
- Forgetting to recalibrate after a major system change.
Need personalised help?
Tell us the exact model, describe the behaviour you observe and, if possible, attach a photo or short video of the installation.