Does the SNZB-06P need a SONOFF hub to work with Edge?

No. It is a Zigbee 3.0 device, so it joins the Zigbee radio on an EpiSensor Gateway directly, without a SONOFF hub or the eWeLink app.

Will it detect someone sitting still?

Yes. SONOFF designed it to detect breathing as well as movement, so it keeps reporting presence while a person is still. Someone lying under a thick quilt may not be detected, because the movement of their chest is too weak.

Why does it report presence in an empty room?

Radar picks up anything that moves: air conditioners, fans, curtains, plants, pets, robot vacuums, pipes, and people in a neighbouring room through the wall. SONOFF recommends moving it away from the source, lowering the sensitivity or lengthening the clear delay.

Does it need a battery?

No. It has no battery and needs a 5 V, 1 A supply through its USB Type-C socket, so plan a socket or USB supply near where it will be mounted.

Can it see through walls and glass?

Through some. SONOFF notes that its radar passes through non-metallic materials such as glass, plastic, ceramics and wooden boards, and that it can detect people or objects in adjacent rooms.

SONOFF SNZB-06P Zigbee radar presence sensor

Compatibility

Compatible with EpiSensor Edge over Zigbee.

Pair it with the Zigbee radio on an EpiSensor Gateway. Edge reads it locally on the Gateway.

Edge reads 4 values from it, listed under Interface.

Connect it with

Gateway ZGW-20
From €899 ex VAT Configure Gateway

Specifications

The SNZB-06P is a human presence sensor that uses 5.8 GHz microwave radar. SONOFF says it detects both ambient motion and breathing, so it keeps reporting presence while someone sits still, where a PIR motion sensor would time out. Its radial detection distance is about 4 m. It also has a light sensor, and it runs on an EFR32MG22 Zigbee 3.0 radio.¹

Power: DC supply. 5 V at 1 A through a USB Type-C socket. There is no battery.¹
Sensor: 5.8 GHz microwave radar¹
Detection distance: About 4 m, radial¹
Sensitivity levels: Low 2.5 m, medium 3.5 m, high 4 m²
Clear delay: 15 to 65,535 s (30 s minimum before firmware 1.0.5)²
Light sensing: Dim or bright, updated when presence is detected²
Wireless: Zigbee 3.0 (IEEE 802.15.4)¹
Radio chip: EFR32MG22¹
Indoor radio range: 30 m¹
Working temperature: -10 to 60 °C¹
Working humidity: 0 to 90 % RH, non-condensing¹
Dimensions: 44.2 × 44.2 × 59 mm¹
Weight: 31 g¹
Enclosure: PC and ABS, indoor use only¹
Mounting: Desktop, magnetic base, adhesive pad or screws¹
Certification: CE, FCC, ISED, RoHS; EN IEC 62368-1¹

Where it is used

Presence in meeting rooms, offices and hot desks, to show heating, cooling and lighting running when nobody is there.
HVAC energy monitoring for commercial buildings
Room use beside temperature, humidity and CO₂ readings, so ventilation and comfort can be judged against who was actually in the room.
Indoor environmental monitoring
Room utilisation for space planning, where a PIR sensor would count a seated meeting as an empty room.

Interface

Readings and settings, with units and ranges where SONOFF publishes them. readable, readable and writable.²

Download

Reading	Unit	Range or values	Access
Measurements 2
PresenceTrue while the radar detects a person, moving or still.	-	Binary state	Read only
Light at last detectionWhether the room was dim or bright; updated only when presence is detected.	-	`dimbright`	Read only
Settings 2
Clear delayTime with nobody detected before the sensor reports the room empty.	s	15 to 65,535 s	Read and write
SensitivityDetection distance: low 2.5 m, medium 3.5 m, high 4 m.	-	`lowmediumhigh`	Read and write

Presence, the clear delay and the sensitivity use the standard Zigbee occupancy-sensing cluster (0x0406, attributes 0x0020 and 0x0022). The light flag is a SONOFF manufacturer-specific attribute (0x2001 on cluster 0xFC11).³

Use firmware 1.0.5 or later; the sensor takes firmware updates over the air. Earlier versions need a clear delay of at least 30 seconds, or the sensor can stay in the detected state, and version 1.0.3 is known to misbehave.²

Setup

Open pairing in Edge
In Edge, open pairing on the Gateway’s Zigbee network. The Gateway accepts new devices while pairing is open.
Power it on
Connect a 5 V, 1 A USB supply to the Type-C socket. On its first power-up the LED flashes slowly for 180 seconds while the sensor looks for a network.¹
Or start pairing by hand
On a sensor that has been paired before, press and hold the button for 5 seconds until the LED flashes slowly.¹
Confirm the join
The LED stays on for 3 seconds and then goes out when the sensor has joined. Check that Edge identifies it as SONOFF SNZB-06P and note its firmware version: a clear delay under 30 seconds needs 1.0.5 or later.¹
Place it away from movement
Point it away from fans, air-conditioning outlets, curtains and plants. Where several sensors share a space, mount them facing the same way or back to back, at least 1.5 m apart, never facing each other.¹
Test the empty room
Sit still in the room and confirm Edge keeps showing presence, then leave and confirm it clears after the delay. If it stays on in an empty room, lower the sensitivity or move it.¹

Common questions

Does the SNZB-06P need a SONOFF hub to work with Edge?: No. It is a Zigbee 3.0 device, so it joins the Zigbee radio on an EpiSensor Gateway directly, without a SONOFF hub or the eWeLink app.¹
Will it detect someone sitting still?: Yes. SONOFF designed it to detect breathing as well as movement, so it keeps reporting presence while a person is still. Someone lying under a thick quilt may not be detected, because the movement of their chest is too weak.¹
Why does it report presence in an empty room?: Radar picks up anything that moves: air conditioners, fans, curtains, plants, pets, robot vacuums, pipes, and people in a neighbouring room through the wall. SONOFF recommends moving it away from the source, lowering the sensitivity or lengthening the clear delay.¹
Does it need a battery?: No. It has no battery and needs a 5 V, 1 A supply through its USB Type-C socket, so plan a socket or USB supply near where it will be mounted.¹
Can it see through walls and glass?: Through some. SONOFF notes that its radar passes through non-metallic materials such as glass, plastic, ceramics and wooden boards, and that it can detect people or objects in adjacent rooms.¹