SONOFF Review 2026: MINI DUO Tested + Complete Smart Home Lineup

If you want a smart home that is affordable, flexible and works with almost any platform, SONOFF is one of the easiest brands to recommend in 2026. Its tiny in-wall relays, Zigbee sensors and hubs cost a fraction of premium alternatives, yet they play nicely with Home Assistant, Alexa, Google Home, SmartThings and Matter.

In this review we go hands-on with SONOFF’s newest dual-channel Zigbee switches, the MINI DUO and MINI DUO-L, then zoom out to cover the whole SONOFF lineup: in-wall switches, dimmers, roller shutter modules, sensors, hubs, heating controls, energy monitors and cameras. By the end you will know exactly which SONOFF device fits your home and wiring.

Quick verdict: SONOFF delivers the best price-to-features ratio in DIY smart home hardware. The MINI DUO is our top pick for Zigbee users who need two-gang control in a tight wall box, while the no-neutral MINI DUO-L is a smart fix for older homes.

Why SONOFF? A Quick Brand Overview

SONOFF is the smart home brand of ITEAD, a Shenzhen-based company that started out making DIY Wi-Fi relays for tinkerers. Over the past decade it has grown into a full ecosystem covering lighting control, sensors, security, heating and energy management.

What sets SONOFF apart is its open, multi-protocol approach. Instead of locking you into one app, SONOFF builds devices for every major standard:

• Zigbee 3.0 for low-power, mesh-based local control (great with Home Assistant, Zigbee2MQTT and ZHA)
• Wi-Fi for simple, hub-free setups through the eWeLink app
• Matter over Wi-Fi for native Apple Home, Google Home, Alexa and SmartThings support
• Thread and Z-Wave in its newer sensors and hubs

At IFA 2026 in Berlin, SONOFF expanded the ecosystem again with a second-generation smart radiator valve (TRV Gen2), a Thermostat Core for boilers, the CAM GlassView window camera and the SenseGuard Zigbee indoor siren. It also showed new dual-protocol Zigbee + Thread sensors, a clear sign the brand is betting on flexibility.

For buyers, that means one practical benefit: you can mix and match SONOFF hardware with whatever platform you already use, and you rarely pay a premium for the privilege.

SONOFF MINI Switch Lineup Compared

The MINI family is the heart of SONOFF: tiny relay modules that hide behind your existing wall switch and make it smart. All of them work with external switches, but they differ in protocol, neutral-wire needs and load ratings.

How to read this table: if you run Home Assistant with a Zigbee coordinator, pick a Zigbee model. If you want app-only control with Apple Home or Google Home, a Matter model is simpler. If your wall box has no neutral wire, your choices narrow to the ZBMINI Extreme L2 and the MINI DUO-L.

Every model above is available on the official SONOFF store, where code TOMI takes 10% off.

Hands-On: SONOFF MINI DUO & MINI DUO-L Review

The MINI DUO and MINI DUO-L answer one of the most common requests from smart home users: two independent relays in one small module. If you have a double rocker switch controlling two light circuits, you no longer need two separate modules crammed into the box.

Design and Build Quality

Both modules ship in a compact box with just the device and a manual, which is all you need. They measure 45 x 39.4 x 16.8 mm, small enough for most standard European and US switch boxes. The housing matches the rest of the SONOFF MINI family, with a pairing button on top and clearly labeled terminals underneath.

One detail we really like: SONOFF uses proper screw terminals rather than flimsy push-in connectors. They hold wires firmly and are easier to inspect after installation. On the label, note that the MINI DUO is listed as model MINI-ZB2GS and the MINI DUO-L as MINI-ZB2GS-L, which is how they appear in Home Assistant.

What’s Different Inside

Opening both units reveals how differently they are engineered:

• Relays: The MINI DUO uses standard Fanhar relays that draw constant power to stay closed, which is fine because it has a neutral wire. The MINI DUO-L uses latching relays that lock in place with a short pulse, saving power and helping prevent LED flicker in no-neutral setups.
• Power supply: The MINI DUO uses a simple inductor to step down voltage. The MINI DUO-L adds a small transformer and extra protection parts so it can draw just enough current through the live wire and load.
• Zigbee chip: The MINI DUO runs on a Silicon Labs EFR32MG21, which has higher transmit power and acts as a Zigbee router. The MINI DUO-L uses the ultra-low-power EFR32MG22 and works as an end device, so it will not extend your mesh.

Installation and Wiring

Installation is straightforward if you are comfortable with mains wiring (if not, hire an electrician). The standout feature is the extra internally bridged Live (L) terminals. Normally you need a Wago connector to split the incoming live wire between the module and your wall switch. Here, you feed live into one L terminal and run a short jumper from the second L terminal to your switch.

The rest follows the usual pattern:

1. Turn off power at the breaker.
2. Connect incoming live to L (and neutral to N on the MINI DUO).
3. Connect your two light fixtures to L1 and L2.
4. Connect your physical switch wires to S1 and S2.
5. Give every wire a gentle tug test, check no bare copper is exposed, then push the module into the box.

Two things to remember: the MINI DUO-L needs a minimum load of about 3W per channel to work properly, and unlike some competitors it does not need an external bypass capacitor.

Home Assistant Integration

To pair either module, hold the button for about 6 seconds until the LED blinks. With the MINI DUO-L, the light fixture must be connected, or there will not be enough current to wake the chip.

Zigbee2MQTT (recommended): Both modules are recognized instantly and fully supported. The MINI DUO exposes the richest set of options:

• Detach relay mode per channel, so the wall switch sends an event instead of cutting power (ideal for smart bulbs)
• Network indicator toggle for the blue LED
• Turbo mode to boost radio range on the MG21 chip
• Power-on behavior (on, off, toggle or previous state)
• External trigger mode: Edge for rocker switches, Pulse for push buttons, or Following
• Inching control, an auto-off timer for stairs or fans
• Delayed power-on to avoid a surge when power returns

The MINI DUO-L offers detach mode, power-on behavior, external trigger mode and delayed power-on, but skips inching, turbo mode and the indicator toggle.

ZHA: Both devices pair, but ZHA only exposes the on/off switches and power-on behavior. Detached mode, inching and, most importantly, the external trigger setting are missing. That matters: a push button left in Edge mode only keeps the light on while you hold it. If you are serious about these switches, use Zigbee2MQTT.

Real-World Testing

Detached mode: With detached mode on, flipping the wall switch sent toggle_l1 and toggle_l2 action events to Home Assistant without cutting power. We used these as automation triggers to control smart bulbs, which never dropped offline. Each channel can be detached independently, so you can run a regular bulb on one gang and a smart bulb on the other.

Network traffic: The MINI DUO is very quiet on the Zigbee network. Without energy monitoring, it sends no periodic reports and only transmits when its state changes. Even under rapid toggling, it grouped changes into single payloads instead of flooding the mesh.

Power outage recovery: We cut mains power with the two gangs in different states. On restore, the module booted instantly and returned both channels to their previous state, so no lights switch on unexpectedly at 3am after a flicker.

Our take: If you have a neutral wire, choose the MINI DUO. It strengthens your Zigbee mesh as a router, handles higher loads and unlocks more features. Treat the MINI DUO-L as a problem solver for older wiring without neutral. Both are available on the SONOFF store with an extra 10% off using code TOMI.

Beyond Switches: The Rest of the SONOFF Ecosystem

In-wall relays are just the start. Here is how the rest of the SONOFF catalog breaks down, and what each category is best for.

Hubs, Dongles and Control Panels

A Zigbee device needs a coordinator, and SONOFF makes some of the most popular ones. The Zigbee 3.0 USB Dongle Plus (ZBDongle-E and ZBDongle-P) is a go-to choice for Home Assistant users who want a cheap, reliable coordinator. If you prefer an all-in-one box, iHost runs local automations and Zigbee without the cloud, and the NSPanel Pro combines a wall-mounted touchscreen with a built-in Zigbee gateway.

Best for: anyone building a local Zigbee network, especially with Home Assistant.

Zigbee Sensors

SONOFF’s SNZB sensor range is affordable enough to put one in every room:

• SNZB-02 series temperature and humidity sensors, some with an LCD display
• SNZB-03P motion sensor for hallways and lighting automations
• SNZB-04P door and window contact sensor
• SNZB-06P mmWave human presence sensor that detects people even when they sit still
• SNZB-05P water leak sensor for kitchens, bathrooms and laundry rooms

SONOFF is now rolling out dual-protocol Zigbee + Thread sensors, which gives you more freedom if you plan to move toward Matter over Thread later.

Best for: automations such as lights on when you enter, alerts when a door opens, or heating that reacts to room temperature.

Smart Heating

The TRVZB Zigbee radiator valve lets you schedule each radiator separately, and the new TRV Gen2 announced at IFA 2026 builds on it. SONOFF also introduced the Thermostat Core for boilers and hydronic heating systems. Room-by-room heating control is one of the fastest ways a smart home pays for itself in Europe and other cold climates.

Best for: homes with radiators that want lower heating bills without replacing the boiler.

Energy Monitoring and Smart Plugs

If you want to see what your appliances cost to run, SONOFF has options at every level. Smart plugs with power metering track individual devices, the POW series relays measure larger loads such as water heaters, and clamp-style monitors can track whole circuits.

Best for: cutting standby waste and spotting energy-hungry appliances.

Security Cameras and Sirens

SONOFF’s indoor cameras, including the CAM Slim and pan-tilt CAM PT models, offer 1080p to 2K video at budget-friendly prices through the eWeLink app. The new CAM GlassView is designed to film your yard or driveway from behind a window, and the SenseGuard Zigbee indoor siren can sound alarms triggered by your door or motion sensors.

Best for: basic home monitoring that ties into your existing SONOFF automations.

Which SONOFF Should You Buy?

Use this quick guide to match a SONOFF device to your situation:

Not sure about your wiring? Remove your switch plate with the power off and check for a blue (EU) or white (US) neutral wire in the box. If you see one, go for a neutral model.

Pros and Cons

What we like

• Excellent value across the entire lineup
• Supports Zigbee, Wi-Fi, Matter, Thread and Z-Wave, so it fits almost any platform
• Tiny in-wall modules that fit crowded switch boxes
• Solid screw terminals and handy internally bridged Live terminals on the MINI DUO
• Detached relay mode keeps smart bulbs online
• Strong Zigbee2MQTT support with local, cloud-free control
• Reliable state recovery after power outages

What could be better

• ZHA support for the MINI DUO is limited compared with Zigbee2MQTT
• No-neutral models (MINI DUO-L, ZBMINI L2) act as end devices and carry lower loads
• MINI DUO models lack built-in energy monitoring
• 10A per gang is not enough for heavy appliances on switched outlets

Final Verdict

SONOFF remains the smartest buy for anyone who wants a capable smart home without premium prices. The MINI DUO is the standout of this review: two independent relays, router-grade Zigbee and a thoughtful wiring layout in a module smaller than a matchbox. The MINI DUO-L earns its place as the go-to fix for homes without a neutral wire.

Around those switches, SONOFF’s sensors, hubs, heating controls and cameras let you grow your setup one affordable piece at a time, on the platform of your choice.

Rating: 4.5 / 5

Frequently Asked Questions

Does SONOFF work with Home Assistant?

Yes. Zigbee models work locally through Zigbee2MQTT or ZHA, Matter models pair through Home Assistant’s Matter integration, and Wi-Fi models connect through eWeLink integrations.

Do I need a hub for SONOFF Zigbee devices?

Yes, Zigbee devices need a coordinator such as the SONOFF Zigbee 3.0 USB Dongle Plus, iHost, NSPanel Pro or another Zigbee hub. Wi-Fi and Matter models do not need a SONOFF hub.

What is the difference between MINI DUO and MINI DUO-L?

The MINI DUO needs a neutral wire, supports up to 10A per channel and acts as a Zigbee router. The MINI DUO-L works without neutral, supports up to 8A per channel and acts as an end device.

Can I use detached mode on only one channel?

Yes. Detached mode can be enabled per channel, so one gang can control a regular bulb while the other triggers smart bulbs.

Is there a SONOFF discount code?

Yes. DailyPick Journal readers can use the exclusive code TOMI for 10% off at the official SONOFF store.

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