Somfy SDN (RS485)  

Developer: Lloyd Aviation Plugins     Like this plugin? Show your appreciation!
Category: Fan, Shade, and Blinds
Github: Github Repo
License: MIT License
Assistance: Get help!   
Plugin ID: aero.lloyd.indigoplugin.somfy-sdn
Latest release: v1.0.2 released on June 21, 2026
Release downloaded: 7 times
Requires: Indigo v2022.1.0 or higher
(Check the Releases tab below for older releases that may have different requirements)
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Somfy SDN (RS485) — Indigo Plugin

Control Somfy SDN (Sonesse Digital Network) roller shades directly from Indigo over a USB-to-RS485 adapter — a software replacement for a dedicated controller such as the Autelis XN200.

Release details
Released on: June 21, 2026
Requires: Indigo v2022.1.0+
Downloaded: 7 times 
Download this release
Changes in this release

Serial-link resilience: the bus recovers from USB/serial drops on its own, tracks a reconnect trend, and can alert you when a fault persists. Validated on hardware.

Added

  • Automatic serial recovery — on a serial I/O error (a power glitch, a USB-hub brown-out, an unplugged adapter) the bus reopens the port and resumes, retrying the failed frame once and every ~3 s while down. No more manual plugin reload after a glitch.
  • Reliability trend — each outage logs a clean detected → recovered pair; the Somfy Bus device gains Reconnects (a running count) and Last Reconnect (timestamp) states, so a trigger can warn you when reconnects start climbing (a dongle, cable, or power feed degrading before it fails).
  • Offline alert — a per-bus "Alert when the serial link has been down this many seconds" setting (default 300 s) fires a "Somfy bus offline" trigger event you can route to Send Email/SMS.
  • Bus device Status now reflects connected / reconnecting / offline.

Changed

  • Idle position re-sync lowered 30 s → 5 s — doubles as the keepalive that makes drop-detection prompt (~5 s). Negligible load (mains-powered motors; unchanged-value state updates are near-free in Indigo).

Install

Download Somfy-RS485-1.0.2.indigoPlugin.zip below, unzip, and double-click the .indigoPlugin bundle. See the Installation & Operation Guide.

Release details
Released on: June 19, 2026
Requires: Indigo v2022.1.0+
Downloaded: 8 times 
Download this release
Changes in this release

First Indigo Plugin Store release. Drives Somfy SDN motors directly over a USB RS485 dongle (replaces the Autelis SC100SDN): position individual shades and groups (open/close/stop/intermediate/position) and report state. Info.plist conformed to the Indigo SDK example for submission.

Release details
Released on: June 17, 2026
Requires: Indigo v2022.1.0+
Downloaded: 9 times 
Download this release
Changes in this release

First public release.

Control Somfy SDN (Sonesse Digital Network) roller shades from Indigo over a USB-RS485 adapter: per-shade open/close/stop/set-position, SDN hardware groups, live position tracking, and closed-loop reissue-on-no-motion.

Install: download the source zip below, unzip, and double-click Somfy-RS485.indigoPlugin (Indigo loads it). See the included guide for setup. Requires Indigo 2022.1+ — pyserial ships with Indigo.