Continuing the discussion from Homey Community App Requests:
But unfortunately Somfy does not provide sufficent API support for the Somfy Home Alarm / Protect devices. Right now only the camera shutters are supported.
Also the MyFox api does not support Protect/Home alarm.
I’ve dropped Somfy an e-mail, as there is an IFTTT implementation so there should be a(n undocumented) way to connect.
If anyone has info on this, please let me know, I would like to develop the App for Somfy Protect / Home Alarm.