Sonoff SNWF-06P24 Review: A Matter Presence Sensor That Watches Without a Hub
The Sonoff SNWF-06P24 is a budget-friendly 24GHz mmWave presence sensor for Matter homes. It reports occupancy and ambient light over Wi-Fi, tunes its seven detection zones from a local web console, and needs no proprietary hub or subscription. The main trade-offs are the roughly 4 meter radial range and radar that cannot detect someone who is asleep.
- Matter homes
- Home Assistant users
- Small rooms and offices
- Smart lighting automation
Pros
- Matter over Wi-Fi, with no proprietary hub or cloud account required
- 24GHz mmWave radar holds occupancy while someone sits still
- Seven detection zones can each be switched off to mask a doorway or an appliance
- Ambient light sensor with calibration and a history log
- Local web console exposes zone tuning, calibration, logs and firmware updates
- Self-learning Detection Calibration filters fixed interference sources
- Works with Apple Home, Google Home, Alexa, SmartThings and Home Assistant
- USB-C powered, so it stays on without batteries
Cons
- Radial range is about 4 meters, so it is a small-room sensor
- Cannot reliably detect a sleeping person
- Reports occupancy only, with no people counting
- 2.4 GHz Wi-Fi only
- Indoor use only, with no IP rating
- Wired USB-C power only, with no battery option
Who is the Sonoff SNWF-06P24 for?
This is a Matter over Wi-Fi sensor, so it suits a home that already has a Matter controller: an Apple Home hub, a Google Home or Alexa setup, a SmartThings hub or a Home Assistant box with the Matter integration. There is no vendor hub to buy and no cloud account required. It is mains powered over USB-C and built for a fixed indoor spot such as an office, a hallway, a bathroom or a small living room, where it can keep the lights on while someone sits still. The 24GHz radar reads micro-movements such as breathing, which is the reason to pick it over a cheaper PIR motion sensor that gives up when nobody moves.
What the Sonoff SNWF-06P24 offers
The headline is the 24GHz mmWave radar, which detects subtle human movement and reports occupancy rather than simple motion. An ambient light sensor adds a lux reading with a calibration offset and a history log, so automations can combine presence with darkness instead of turning lights on in daylight. The detection area is split into seven independent zones inside a roughly 4 meter range, and each zone can be disabled to mask a doorway, a window or a fan. Detection Calibration learns fixed interference sources and filters them out, with a sensitivity adjustment to fine-tune it. Because it is Matter over Wi-Fi, occupancy and illuminance appear in Apple Home, Google Home, Alexa, SmartThings and Home Assistant. A local OpenEdge web console adds the settings Matter exposes poorly: zone layout, calibration, sensitivity, the detection duration, the illuminance offset, firmware updates, logs and Matter fabric management. Local MQTT, WebSocket and an open API are documented for Home Assistant and openHAB.
What to know before you buy
The radial detection distance is about 4 meters across a 120 degree angle, so this is a small-room sensor rather than a whole-floor one. Placement matters: SONOFF says a completely motionless person is best detected within 3 meters facing the device, and the sensor cannot reliably detect someone who is asleep. It reports occupancy for the room as a whole, not a count of people, and it is not a fall detector. The radio is 2.4 GHz Wi-Fi only, it has no battery and must stay plugged into USB-C, and it is an indoor device with no IP rating. Its self-learning calibration filters fixed sources such as fans and pipes, but not moving interference such as pets or robot vacuums. Finally, this is the Matter version: it has no Zigbee radio, so it is not a Zigbee router and cannot join a Zigbee mesh.
Is the Sonoff SNWF-06P24 worth it?
For a small room in a Matter home, yes. It combines true 24GHz presence detection, a calibrated lux reading and seven maskable zones in one mains-powered device, and it exposes them through the Matter ecosystems most households already use, with a local web console for the fine tuning. The price sits at the budget end of mmWave sensors, and there is no subscription attached. If you need to cover a large open-plan room, count occupants, monitor sleep or extend a Zigbee network, a different sensor is the better fit. If you have a Zigbee coordinator and no Matter controller, the SNZB-06P24 sibling covers the same sensing job over Zigbee.
Frequently asked questions
Does the Sonoff SNWF-06P24 need a hub?
It needs a Matter controller and a 2.4 GHz Wi-Fi network, but no Sonoff hub. Apple Home, Google Home, Alexa, SmartThings and Home Assistant can all commission it over Matter, and its own local web console is available through its access point or LAN address.
Does it work with Apple Home, Google Home, Alexa, SmartThings and Home Assistant?
Yes, all five are reached through Matter. SONOFF lists occupancy and illuminance as the exposed signals, and the local web console covers the detection zones, calibration and sensitivity that the Matter apps do not.
How far and how wide does it detect?
SONOFF specifies a radial detection distance of about 4 meters across a 120 degree angle, divided into seven independent zones that can each be enabled or disabled. A completely motionless person is detected most reliably within 3 meters, facing the device.
Does it run on batteries?
No. It is powered continuously from a USB-C port rated 5V 1A, so it has to stay plugged in. There is no battery version.
Can it detect several people or monitor sleep?
It reports whether the room is occupied, not how many people are in it. SONOFF states it cannot accurately detect someone who is asleep, and it has no fall detection.
Is this the Zigbee model?
No. The SNWF-06P24 is the Matter over Wi-Fi version. The Zigbee 3.0 model is the SONOFF SNZB-06P24, a separate product with its own radio and hub requirements.
