Xiaomi Mijia / LUMI Aqara - door opening sensor

4 minutes of reading
Proconductor: Xiaomi / LUMI
Category: Sensore
Type: Sensorand opening gates
Technology: ZigBee
Installation difficulties: Bassa
Ease of use: Alta
Availability: Amazon
Review review: 1.0

The varch opening detection sensori (typically for doors and finestre) 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 dedicated to the detection of openings for the profirst personal home automation.

The sensor is composed from two elements: a logical part (the largest, a couple of centimeters long) and the magnet (a small element about one centimeter on the side). The two elements are installed using the double-sided adhesive tape on the back: they must be placed on the two leaves of the gate to be monitored, making sure that each one is placed on one of the two leaves and that, when the gate is closed, the two elements are placed side by side.

Xiaomi Aqara Sensorand doorways finestra - installation

Opposite of the change of state (from closed to open and viceversa), the unit sends this detection to BRIDGE/Gateway Zigbee↔︎TCP/IP in use on which the sensor is certified. Moreover, communication towards the bridge also communicates the charge status of the battery.

If the sensor is connected to a gateway Xiaomi or Aqara, upon an opening survey it is possible to receive a notification (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 CR2032 button battery (replaceable) and works via proradio tocol ZigBee through which it is possible to receive the signal of detected openness as well as of battery charge level.

The sensor is prolearned from Xiaomi and Aqara: the two versions they are substantially identical and - as we will see below - can be used indifferently with a gateway or with the other.

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.

Construction materials are noticeable 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).


Talk about the degree of 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.

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 domotics integrability, as for compatibility, passes 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 personal HUBsoftware. 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 Xiaomi line, which can be integrated with the 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.


Detailed evaluation:

Constructive quality
Use: quality and experience
Xiaomi Mijia: Lumi Aqara - door opening sensor - Buy on AmazonThis sensor does not have great features: does one thing - and does it well - or monitors an open / closed state. Half a point more for the fact of census both status changes (from closed to open and vice versa).

The important thing for these sensors, typically used to monitor the safety of an environment is reliability: as known the Xiaomi / Aqara sensors are well made, not too expensive and, what appanointed crucial, reliable. The great level of domotics integrability (if attested on gateway Xiaomi, as explained in the section on integrability) allows its use in a wider ambit than the native one, relegated to the only one app mobile (Xiaomi / Aqara that is), which does not hurt - not to mention that it is fundamental.

On the sidelines: Aesthetically we find the most pleasant Aqara of Xiaomi, but obviously it is a pure personal taste.

We like it, it doesn't cost too much, it works well. Sure: he doesn't make coffee, but we'll make a right.

ConBee II (Gateway ZigBee USB)

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