I had the same problem with my Somfy blinds. I found the following two links
https://github.com/Nickduino/Somfy_Remote
and I implemented this:
https://github.com/RoyOltmans/somfy_esp8266_remote_arduino
Because the Somfy blinds use a slightly different freq, I had to buy replacement crystals and solder them in place (as described in the links). It works perfectly. I have even created timed covers so I can use s slider to open or close partially.
The Broadlink is great for remote power sockets (the old kind that had 4 button remotes). I have also added controlleres to some roller blinds that the Broadlink controls
Kogan SmarterHome™ Smart Blinds Driver I don’t connect them to the app, just learn the RF remote commands.