Adding my Somfy garage door to Home Assistant

I’ve been gradually connecting more devices to Home Assistant, and my garage door was next on the list. It’s a roller shutter door controlled by a Somfy Rollixo RTS. The existing radio remotes work perfectly well, but I wanted to operate it from Home Assistant without replacing the controller or adding another proprietary hub. After discussing the options with ChatGPT, I settled on a SONOFF MINI-ZBD. It’s a small Zigbee relay with volt-free (dry) contacts, which makes it suitable for connecting to the Somfy’s external keyswitch input. Wiring it up The Rollixo RTS has a keyswitch input that operates the door when two terminals are briefly connected. The MINI-ZBD can provide that connection through its normally open relay. Better still, the Somfy has a 24V DC auxiliary supply, so there’s no need for a separate power adapter. For my Rollixo RTS, I used these connections: Somfy terminal SONOFF connection Purpose 14 (+24V DC) DC+ Power 15 (0V) DC− Power 10 (keyswitch) NO Relay contact 11…

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