Leak protection is no longer a luxury and a necessity for any modern home. Xiaomi Flood Guard is a compact and efficient solution that prevents flooding and costly repairs. The main advantage of the device is its autonomy and ability to instantly alert the owner of a critical situation.
The installation process does not require any technical skills or a wizard. You can do all the necessary manipulations yourself in minutes with only a smartphone with Internet access. Integration into the Mi Home ecosystem opens up vast possibilities for automation, allowing not only notifications, but also to block water automatically when moisture is detected.
Components and features of the leak sensor
The standard box includes the sensor itself, which is made in a minimalist white case, and a set of documentation. The device is powered by a lithium battery type CR2032, which is usually already installed inside and protected by insulating tape. Contacts that respond to water are located on the bottom of the body and made of corrosion-resistant alloy for durability.
A key feature of the model is support for Zigbee communication protocol, which means that the sensor must have a compatible gateway that will broadcast the signal to your router or to the cloud. Direct connection to the Wi-Fi router without an intermediate hub is impossible, which is important to consider when planning a purchase.
⚠️ Warning: Before removing the insulation tape, make sure you are ready for immediate setup, as the sensor may start looking for the network immediately after the battery is activated.
- 🔹 Compact housing protected from dust according to standard IPX3.
- 🔹 The volume of the audible alarm is 80 dB.
- 🔹 Autonomous battery operation up to 2 years in normal mode.
- 🔹 Support for voice control through Google Assistant and Amazon Alexa.
Despite the simplicity of the design, the sensitive electronics are hidden inside. The tightness of the housing allows the device to withstand increasing humidity, but full immersion in water for a long time is not recommended, as this can damage the speaker and the pairing button.
Technical Specifications of the Zigbee Protocol
Equipment and training required
Before installing, you need to make sure that all the components are available, and the centerpiece is the Xiaomi Gateway (version 2, 3 or Hub), which acts as a bridge between the sensor and the Internet, without this device, the sensor will remain isolated and will only work in local audio alarm mode.
The second requirement is a stable Internet connection and a smartphone with the Mi Home app installed. It is important that the region in the application settings corresponds to the region chosen when the gateway was originally set up. Often users experience visibility errors precisely because of the discrepancy of regions (for example, the Chinese gateway and the European account).
It is also important to determine the installation location in advance, and the sensor should be located at the lowest point of possible accumulation of water, such as under the sink, washing machine or boiler, and the surface should be dry and clean at the time of installation, to avoid false positives during the adjustment process.
- 🔸 Xiaomi Gateway with 220V network connection.
- 🔸 Smartphone with Android 5.0+ or iOS 11.0+.
- 🔸 Stable Wi-Fi network (2.4 GHz).
- 🔸 Mi Account Account.
Check the battery charge in the sensor if it has been used before. For new devices, it is easy to remove the insulation gasket. Make sure that the gateway is connected to the power grid and is on the indicator of operation, and is also within range of the sensor.
Step-by-step instructions for connecting to Mi Home
The pairing process starts by adding the gateway itself to the app, if it hasn't already been done. Open Mi Home, click on the plus in the upper right corner and select device search. Once the hub has been successfully set up, you can start connecting the peripherals.
In the main menu of the application, select your gateway and go to the control section. Find the add-on button (usually a plus icon or the words "Add Subdevice"). The application will go into search mode, and a countdown timer will appear on the screen.
☑️ Connection algorithm
Now you need to activate the pairing mode on the sensor itself. To do this, press and hold the round button on the top panel for 5-7 seconds until the indicator starts flashing blue. If the blinking does not begin, try pressing the button quickly 3 times.
⚠️ Warning: Do not bring the sensor too close to the gateway (close) 10 (cm) during pairing, this may cause signal interference — 1-2 square.
The app will automatically detect the device and give it a name, like "Leak Sensor." You can rename it by specifying a location, like "Under the kitchen sink." Once it's successfully added, the sensor light will go out, going into standby mode.
- 🔸 Make sure Bluetooth on your phone is turned on to speed up search.
- 🔸 Keep your phone near the sensor during the initial setup.
- 🔸 Wait for the device to appear in the list before exiting the add-on menu.
If the automatic search is unsuccessful, try to manually select the device from the list of "Other" -> "Security" -> "Xiaomi Water Leak Sensor." Manual method often helps when the automatic definition of the protocol fails.
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Successful pairing is confirmed by the sound signal on the sensor and the appearance of its icon in the Mi Home app.
Setting up scenarios and automation
The key value of a smart sensor is revealed when you create scenarios. In the Mi Home app, go to the Smart or Automation tab, and create a new scenario that allows you to link the state of the sensor to the actions of other devices.
As a condition (If), select your leak sensor and the "Leak detected" state. This is the trigger that triggers the chain of action. Then, under "Then," you can select the different responses of the smart home system.
Example of scenario logic:
If the leak sensor = Water detected
And time = any time
TR: Energize the lock (siren)
Send a push notification
TR: Include a smart socket (for electromagnetic valve)One of the most useful features is the integration with the electromagnetic valve, and if you have a smart tap that supports Zigbee or Wi-Fi, you can set it to close automatically when you receive a leak signal, which completely eliminates the human factor and prevents the flood even in your absence.
| Type of action | Description of reaction | Recommended use |
|---|---|---|
| Push notification | Instant message to the phone | Basic owner's watering |
| Sound signal | Switching on the siren at the lock | Attracting the attention of people in the apartment |
| Smart socket | Device power outage | Safety of washing machines |
| "I'm Home" script | Launch of integrated verification | Daily monitoring of the system |
You can also configure a notification-deactivation scenario, for example, if the sensor is dry within 10 minutes of activation, the system can send a report that the situation has normalized, which is convenient for tracking the dynamics of drying out after the cause of the leak is eliminated.
Accommodation and operating rules
The right location of the sensor is critical to its efficient operation: water always drains down and accumulates at the lowest point. Place the device directly on the floor, in a corner, or under potentially dangerous appliances.
It is not recommended to install the sensor on a carpet or thick mats, since the fabric can absorb water before it reaches the sensor contacts. In such cases, it is better to use special pallets or raise the sensor to a minimum height with a stand if the floor design allows water to flow under it.
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Use double-sided tape from the kit (or a quality analog) to fix the sensor so it doesn't shift when cleaning, but remember that the contacts should have access to the floor.
Check the condition of the device regularly. Although the manufacturer claims a long battery life, it is recommended to check the level of charge in the application every six months.
- 🔹 Avoid direct water jets when cleaning.
- 🔹 Do not close the sensor with furniture or boxes.
- 🔹 Wash the contacts with dry cloth during planned cleaning.
- 🔹 Check the relevance of the device firmware in the settings.
If the room is humid (such as in the bathroom while showering), false positives are possible, and in such areas it is better to use sensors with a higher sensitivity threshold or adjust scenarios by adding a delay before sending an alarm signal.
Diagnostics of malfunctions and discharge
During operation, there may be situations when the sensor stops responding or does not display the status correctly. First of all, check the signal level of the Zigbee in the application. If it is weak, you may need to move the gateway closer or install a repeater.
A common problem is status desynchronization, and the sensor can show dry when the water is already removed, or vice versa, in which case, a brief press of a button on the case helps, which forcefully updates the status of the device on the network.
⚠️ Warning: If the sensor light flashes red, it may indicate a critically low battery charge or internal electronics error.
To completely reset the device, press and hold the button on the sensor for 10-15 seconds, the indicator will flash, confirming the reset configuration, and then the device must be added to the application as new.
If the device is not visible on the network after reset, try to bring it close to the gateway (at a distance of 10-20 cm) for the time of re-pairing.