SONOFF
SONOFF DUALR3 Dual Relay Module
- HACS component
- Local control
- Wi-Fi
Prices verified September 2026
See more relays & dimmer modules picks on our Amazon storefront →Our verdict
Two independently switched, power-metered relays in one module — genuinely built with curtain and roller-shutter motors in mind, so it doubles as a switch-side controller for an existing AC blind or shutter motor, unlike the Aqara Curtain Driver E1's standalone battery motor with nothing to wire. Each channel handles up to 10A (20A/4400W combined) and needs a neutral wire; the extra relay wiring and motor connections rarely fit a shallow UK single-gang back box, so check depth first. Best HA route is the community SonoffLAN HACS integration over eWeLink LAN mode, fully local once set up.
What can Home Assistant control on the SONOFF DUALR3 Dual Relay Module?
| Control | Type | What it does |
|---|---|---|
| Curtain position | Cover | Active in motor mode: open/close/stop plus 0-100 set-position. Position is a time-calibrated estimate, not encoder-verified, and can drift or reset if calibration wasn't run cleanly. |
| Motor direction | Cover service | Drives the two relays as electrically interlocked forward/reverse outputs; SonoffLAN prevents both relays firing at once to protect the motor. |
| Relay 1 / Relay 2 | Switch | Two independent switch entities, present only when the device is configured for 2-channel switch mode; replaced entirely by the single cover entity if mode is changed to motor/curtain. |
| Power metering | Sensor | Voltage, current, and active power reported independently per channel in every mode, including motor mode — usable for a current-draw-based stall/end-stop detection automation. |
SonoffLAN's dual-relay curtain class maps motor mode to a proper cover entity with open/close/stop and 0-100 set-position support — no manual template cover required. That position isn't from a physical encoder though; it's the module's own time-calibrated estimate, and reported issues show it can stick at 0 or stop updating if the calibration run wasn't completed cleanly, so treat the displayed percentage as approximate. Switching between 2-channel switch mode and single-relay curtain mode happens in the eWeLink app, not in Home Assistant, and it changes which entities SonoffLAN exposes, so the mode needs locking in before building automations around it. Per-channel voltage/current/power metering keeps reporting even in motor mode, so a current-draw automation can catch the motor stalling against a hard end-stop and correct the drifted position rather than trusting the reported position alone.
Specs
| modes | independent 2-channel or single curtain/shutter mode |
|---|---|
| channels | 2 |
| max load | 10A per channel, 20A/4400W combined (2x10A relays) |
| dimensions | 88 x 40 x 22mm |
| input voltage | AC 100-240V 50/60Hz or DC 6-32V |
| standby power | < 0.5W |
| neutral required | true |
| power monitoring | true |
How does the SONOFF DUALR3 Dual Relay Module compare?
| Product | From | Protocol | Local control | Integration |
|---|---|---|---|---|
| SONOFF DUALR3 Dual Relay Module (this product) | £15.33 | Wi-Fi | Yes | HACS |
| Aqara Dual Relay Module T2 | £29.74 | Zigbee | Yes | Zigbee2MQTT / ZHA |
| Aqara Single Switch Module T1 (No Neutral) | £26.99 | Zigbee | Yes | Zigbee2MQTT / ZHA |
| Candeo Zigbee Dimmer Module (C-ZB-DM204) | £39.99 | Zigbee | Yes | Zigbee2MQTT / ZHA |
Frequently asked questions
- Does the SONOFF DUALR3 Dual Relay Module work with Home Assistant locally?
- Yes. The SONOFF DUALR3 Dual Relay Module is controlled locally in Home Assistant through a community integration installed through HACS (sonoff), so it keeps working if your internet connection or the SONOFF cloud goes down. Control and state updates stay on your own network.
- Which protocol does the SONOFF DUALR3 Dual Relay Module use, and do I need a hub?
- The SONOFF DUALR3 Dual Relay Module uses Wi-Fi. To pair it with Home Assistant you need no hub — it joins your Wi-Fi network directly. SONOFF's own hub is not required when you integrate through a community integration installed through HACS (sonoff).
- How much does the SONOFF DUALR3 Dual Relay Module cost in the UK?
- The lowest price we have listed for the SONOFF DUALR3 Dual Relay Module is £15.33 at Amazon UK. Prices were last checked in September 2026 and change often, so confirm on the retailer's page before buying.