The Sonesse 40 io is Somfy's quiet 40 mm tubular motor for interior blinds and projection screens, and it is the one to specify when a shade has to be automated properly: io-homecontrol means the motor reports its real position back to the gateway, so Home Assistant reads a position instead of guessing one.
Rated at 44 dBA, which is the number that matters in a bedroom or a home cinema, and sized for the 40 mm tubes and standard crowns and drives most interior roller, Roman, pleated, and wooden venetian blinds use. The cable is not removable, so the drop side and cable route are decided at order time rather than on site. In Home Assistant it arrives through whichever gateway holds the pairing, as a cover with position, and because io-homecontrol is bidirectional and encrypted, a move made from a wall remote is reported rather than lost, which is what an RTS motor can never do. Interior only. The 40 mm family also exists in an RTS version at a lower price; specifying that instead is what turns a position-aware shade into a stateless one, and no gateway or integration can recover the difference later.
Hardware availability
TaHoma switch is the current hub in both Europe and North America, in two regional variants: the European unit adds io-homecontrol to RTS and Zigbee, the North American unit is RTS and Zigbee only because io-homecontrol is not sold there. TaHoma v2 and the Connexoon boxes are no longer marketed, and Somfy’s own product page labels the Connexoon box discontinued, but both stay supported by Home Assistant and both still answer the local API. Somfy myLink is listed obsolete on the Somfy store. Motors are ordered through Somfy dealers and shade fabricators rather than retail, so several of the links below are manufacturer product pages rather than storefronts.
Where to buy
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