I don’t know if this helps but I have the Somfy One alarm and the only way I could find, without lots of work, was to add it to my Tahoma box (which I already had for other things) and then I modified the Tahoma app to recognise the alarm in Tahoma.
If you want to go that route i can ask the Tahoma app dev to include my additions or find a way to share my modified app so you can install via the CLI.
There is possibly a way to add the alarm by writing an app for it as MyFox (which the alarm is based upon) does have an API. I haven’t bothered trying as it already works for me using Tahoma.
Edit Extra Note: My modifications add the ability to set the alarm state to Off, Partial or Full and trigger a flow if the alarm is activated.
