I tested this product with Smartthings and works great. Firstly it is recognized as Door sensor. I changed the Device Type in the API to Z-Wave Smoke Alarm and works perfect.
The states sent are:
battery: 100 %
In the log (Recently) appear the battery checks and the alarm state, for example, if you press the button on the smoke detector, the events are fired.
In Smart Home Monitor appear good as Smoke detector.
Happy with the purchase.
Note that there are zwave and zigbee versions. Tested has been zwave version.
Now waiting for the Xiaomi Mijia Honeywell Fire Alarm Detector Zigbee to test it.