I check the received model

There are a lot of references, the model I received is a mystery. It has no reference inscribed, it is to the Zigbee2MQTT detection that I found a model.

It should be noted that in this model, the supplier added something to attach the sensor to the wall, which is nice.

I look at the technical characteristics

I put batteries

This model is equipped with a very practical AAA battery system (not supplied).

I launch the Zigbee pairing

I switch Zigbee2MQTT to pairing mode but nothing happens.

I press the reset button at the top of the module with a metal spike until the blue LED flashes.

The pairing starts.

It is therefore the DS01 model that appears on Zigbee2MQTT with an unknown manufacturer?! zbeacon?!

On the drawing, it looks like a sonoff by the way, I think zigbee2mqtt identifies it as an SNZB-04. 

The Open/Closed contact is well-functioning.

Clearly the information on the batteries goes up.

I'm going to Home Assistant.

I can find my equipment there

It is perfectly integrated! Note that it comes back in SNZB-04 as in Zigbee2MQTT, this product must be a clone of SNZB-04, impeccable.