I used this method today and pretty happy with the results, thanks for the tip!
The hardware build was very easy, but the software seems a bit trickier, HA using ZHA detects the relay board as Tuya T0004 and it works, but the switches latch. Are you perhaps aware how I might set/emulate them as momentary?
This seems like a no-brainer to me… local control with support from a third-party… which integrates easily with HA (and Hubitat which I also care about).
Just because I don’t see it recommended here:
Somfy also sells a ~realtively~ cheap Somfy 1870755 Connectivity Kit that apparently works with the Overkiz integration. It’s 60€ and should be a complete solution, for those who don’t want to tinker.