Fibaro
Fibaro Dimmer 2 (FGD-212)
- Z-Wave
Verified September 2026
The veteran premium pick: a Z-Wave (EU 868MHz) dimmer that auto-calibrates to the load, works on UK 2-wire no-neutral circuits (bypass needed below 25W), and is rock-solid under Z-Wave JS. It needs a deeper back box than most modules — Fibaro specs a 60mm minimum depth, so measure before buying if your pattress is a shallow 16mm or 25mm can. At around £53-55 it costs more than Candeo's Zigbee dimmer module (£39.99), trading Zigbee's simpler mesh setup for Z-Wave's stronger through-wall range and a genuine second scene-controller input Zigbee modules don't offer. Stock has been patchy — Vesternet has shown it backordered before — buy when you see it.
In Home Assistant
| Control | Type | What it does |
|---|---|---|
| Dimmer output | Light | Primary light entity (brightness 0-99), separate from the scene-controller input node HA also creates for the same device. |
| Power | Sensor (W) | Real-time active power draw from Z-Wave JS's meter command class. |
| Energy | Sensor (kWh) | Cumulative energy consumption, resettable via a service call. |
| Scene activation | Event | Central Scene notifications for single, double, triple press and hold on the physical switch terminals — consumed via a value-notification event, not an entity state. |
| Dimming curve/calibration | Config parameter | Forces leading-edge/trailing-edge calibration behaviour, but the calibration run itself must be triggered by physically holding the device's button, not from HA. |
Native zwave_js discovers this as two logical devices — the dimmer output (light entity plus separate power/energy sensors) and a scene-controller input node whose S1/S2 terminals fire value-notification events for single, double, triple-click and hold, independent of the light entity. Calibration has to be run from the physical button, not from HA — hold it and read the LED colour: green means a dimmable load was recognised, yellow means it's treating the load as non-dimmable, red means it failed (too little load or over the wattage ceiling). Cheap dimmable LEDs on the 2-wire connection are the main practical headache: low draw under ~25W can flicker or fail to switch off fully, which is exactly the bypass/neutral-wire case Fibaro's own FAQ calls out. It advertises S2 security during inclusion but has been reported dropping to S0-only even with a correct DSK, so don't be surprised if it lands S0 rather than the S2 it claims to support.
Specs
- channels
- 1
- security
- S0 (advertises S2, commonly enrols as S0)
- max load w
- 250
- dimensions mm
- 42.5 x 38.25 x 20.3 (L x W x H)
- zwave frequency
- 868MHz EU/UK
- power monitoring
- true
- zwave generation
- Z-Wave Plus
- no neutral capable
- true
- min back box depth mm
- 60
- bypass required under w
- 25
- operating temperature c
- 0 to 35
- max load resistive inductive va
- 225
- max load resistive capacitive va
- 200