This blueprint pairs exactly two Samotech SM323 v2 dimmers into a tight ~200ms mirror - fast enough that the second device feels like a companion of the first, not a delayed echo. Designed for 2-way lighting circuits where you want virtual companion behaviour without physical traveler wiring.
Import
Or paste this raw URL into Settings → Automations & Scenes → Blueprints → Import Blueprint:
https://raw.githubusercontent.com/samotech-ltd/home-assistant-blueprints/main/samotech-sm-series-direct-mirror-pair.yaml
What it does
Two-device mirror with shorter debounce than the general sync group blueprint. When device A changes brightness, device B follows within ~200ms (and vice versa). The pair acts as a virtual 2-way circuit without needing a traveler wire between the two switch locations.
This is the fastest option for true companion behaviour but is hard-limited to two devices. For 3+ devices, use the [Linked Sync Group blueprint] - [Blueprint] Samotech SM-Series Linked Sync Group — mirror 2-5 dimmers/switches on the same circuit (ZHA + Z2M).
Use cases
- Two-way landing/stairwell lighting where each end has its own SM323 wired with L+N only, no traveler wire between them
- Smart bulb installations (Hue, Tradfri, Innr) where the dimmer signal is sent to the bulb and you want a second wall location to control the same bulb without rewiring
- Bedroom doorway + bedside companion pair
Requirements
- Home Assistant 2024.6 or newer
- ZHA or Zigbee2MQTT
- 2 Samotech SM323 dimmers (one connected to a bulb, the other is connected via L and N only with no load in another location)
- Both devices on the same Zigbee mesh
Configuration
- Device A - first SM-series entity
- Device B - second SM-series entity
- Debounce - feedback-loop suppression window (default 150ms)
Notes on smart bulb installations
If both SM323 dimmers are wired L+N only (no load), and the actual load is a smart bulb on a separate Zigbee command, this blueprint gives you the "smart bulb mode" / "decoupled mode" experience that Inovelli Blue and Aqara H1 do via firmware toggles — but achieved through wiring instead. The Samotech device sends only the dimming/state signal; the smart bulb does the actual dimming. No flicker, no compatibility issues with smart bulbs.
Source & full guide
- Blueprint repo: samotech-ltd/home-assistant-blueprints
- Full write-up: Samotech Direct Mirror Pair guide
Feedback welcome
Reply with config issues or feature requests - I'll iterate.