Somfy RS485 transmitter has a serial connection option via RS485 to RS232 adapter that’s how many home automation systems connect to Somfy blinds but they’re not cheap
cheapest option is to get the dry contact somfy motors and use wireless relays maybe
Want something to work with Alexa. Had a good look at that Vera unit, and looks like it would not be much cheaper than the Somfy unit, and a lot more involved to set up, but thanks for the info