@carl.debilly Thanks for taking time to code this device type. I had a heimantech smoke detector for a while and use it with a device type shared by another forum member. Its quite basic but works. To test, I can press the button on the alarm and it registers as smoke detected in smartthings.
I tried the same with your device type and didn’t work. Is this something not configured in your version? Please see the device handler I use below.