Somfy io shutters in Home Assistant — fully local, for €80
If you own Somfy shutters, you'll quickly discover there are two very different worlds behind the brand: RTS and io-homecontrol. RTS is the old, unencrypted protocol — you can control it with a cheap RF transmitter like an RFXtrx or an ESP32 running ESPSomfy. io is a different story entirely, and every road to an io device runs through an official Somfy gateway.