Xiaomi Mijia / LUMI Aqara - flooding sensor

4 minutes of reading
Proconductor: Xiaomi e LUMI
Category: Sensore
Type: Sensorand flooding
Technology: ZigBee
Installation difficulties: Bassa
Ease of use: Alta
Availability: Amazon
Review review: 2.2

The flood sensor of the line Xiaomi Mi Smart Home (Mijia) (or of the line Lumi Aqara Smart Home Automation: same name, same characteristics, same cost) is a small radio component ZigBee (about 3 cm diameter) dedicated to the detection of water leaks.

The functionnameis simple. On the back of the device are present two small metal contacts that graze the bottom: contacted by liquid water deduce this presence and send the survey to BRIDGE/Gateway ZigBee↔︎TCP/IP in use.

Sensorand Xiaomi Aqara flooding

If the sensor is connected to a gateway Xiaomi or Aqara, a notification of flooding can be received (via app mobile), to make sounds to the gateway and more. By default i gateway Xiaomi / Aqara emit a very high-pitched sound for about a minute.

The dimensions, as mentioned, they are limited, as well as weight, around 10 grams. The device is powered by a standard 2023 button battery and works via proradio tocol ZigBee through which it is possible to receive the signal of flood detection as well as the battery charge level.

Il pairing - or the installation - takes place by combined use of the gateway and of the sensor itself: taking for granted the previous, initial configuration of the gateway on 'app, it will be sufficient to open theapplation (taking care to be on it Wi-Fi of Gateway) and hold down the back of the sensor that hides a button: after three seconds the sensor will be detected by theapp e will be added to the operating environment at which it can then be configured in terms of notifications and automatisms.

The construction materials struck us for quality and compactness. Use is obviously limited at the range of radio transmission between sensor and Gateway that in the field ZigBee, the air line is certified for at least 100 meters (without obstacles and in the absence of signal repeaters).

The sensor is IP67, so it is also possible to install it outside.

Sensorand flooding Xiaomi Aqara - retro
the back of the sensor.

Finally, a curiosity: when integrated using zigbee2mqtt or deCONZ, the sensor also provides the temperature of the environment in which it is placed with an accuracy to the degree.


Talk about the grade compatibility of a single component ZigBee it makes little sense. In fact, these components cannot be used alone but only coupled with an element BRIDGE/Gateway ZigBee↔︎TCP/IP, therefore its compatibility derives directly from the degree of compatibility of this "collector" element to which it is associated.

We have a way to test cars with success this associated sensor:

Use of the sensor associated with gateway Xiaomi and Aqara provides partial compatibility with Google Assistant e Amazon Alexa, while the service is not supported IFTTT. As we will see below, these limits can be circumvented in some cases by the degree of integrability of these gateway. Furthermore, while the gateway Aqara it is natively compatible with Appthe HomeKits, gateway Xiaomi is not.

Use with ConBee and RaspBee implicitly provides a high degree of compatibility, given that these two gateway work directly with personal HUBsoftware.

Owners of Homey can directly use the sensor without needing gateway (it is Homey itself), therefore since Homey is compatible with Google Assistant e Amazon Alexa (as well as IFTTT), it also becomes the sensor.

Domotics integrability

The degree of home automation integrability, as for compatibility, it goes through the gateway to which the sensor is connected.

Il gateway Xiaomi it can be integrated with practically all realities HUB best known software:

  • Home Assistant (see integration guide);
  • Homebridge (to render the gateway and therefore the accessories connected to it compatible Appthe HomeKits);
  • Domoticz;
  • openHAB.

As compatible natively with Appthe HomeKits, il gateway Aqara it cannot be integrated with HUB personal software. In practice using a gateway Aqara it is not possible to integrate the accessories connected to it profirst personal home automation. The alternative to solve this proproblem exists: use the sensor with the gateway of the line Xiaomi, which can be integrated with personal HUB(unlike the Aqara). A clarification is a must: given that the HUB perosnali are in turn compatible Appthe HomeKits, the fact that the gateway Xiaomi is not compatible with Apple HomeKit is a not-proBlema.

If instead to integrate the sensor to the proprio personale HUB do not want to use a gateway Xiaomi / Aqara can be used alternatively elements like the BRIDGE/Gateway software deCONZ combined with antennas ConBee and / or RaspBee (the first with any computer the second specifically with Raspberry Pi). Another alternative: it is possible to integrate the sensor through the BIRDGE /Gateway given by the binomial zigbee2mqtt + CC2531.

Homey, as mentioned, contains an antenna in itself ZigBee, therefore it is able to autonomously integrate the sensor without the need for other components.

Sensorand Xiaomi Aqara flooding
the sensor and its battery.


Detailed evaluation:

Constructive quality
Use: quality and experience
Xiaomi Mijia: Lumi Aqara - flood sensor - Buy on AmazonThe Xiaomi / Aqara flood sensor we really like because it allows us to monitor any water leaks with simplicity (and effectiveness) procoziness of a washing machine, of tanks, under sinks etc.) both at home and outside. When integrated with our personal home automation allows us not only to receive notifications from our home automation but also and above all to insert the sensor which trigger for eventual - saving - automations, for example automatic closing dell 'water supply previously domotized.

Promoved with flying colors.

ConBee II (Gateway ZigBee USB)

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