02 Reset & Teardown (FCC ID 2APN5SNZB-02)

Before you buy the Generic IoT 02, check what's inside.

The Sonoff SNZB-02 is a Zigbee 3.0 certified temperature and humidity sensor designed for low-power, real-time environmental monitoring. It integrates seamlessly with the Sonoff Zigbee Bridge and other Zigbee 3.0 compatible hubs for smart home automation.

⚠️ NOTE: Ensure correct battery polarity when replacing the CR2450 battery.

Quick Specs

Manufacturer: Generic IoT
Model: 02
Protocol: WiFi
Chipset: Unknown
Ecosystem: Unknown
App: Unknown

🔧 Geek Corner (Flashing Info)

Chipset: Unknown
Flashable: ❌ No
Info: Zigbee devices like this typically do not support flashing custom firmware due to proprietary protocols and chipsets.

User Manual

Scanned pages from the official user manual:

02 Manual

External Photos

Photos of the device exterior:

02 Exterior

Internal Photos

Teardown photos showing the PCB and components:

02 PCB

Verdict

The 02 is a WiFi device from the Unknown ecosystem.

📄 Click to view full text manual (SEO)

SNZB-02
User manual V 1.0
Temperature and Humidity Sensor
中文-------1-5 English-------6-10 
eWeLink
eWeLink
1. 下载APP
>
1
>
ZBBridge
2
ZBBridge
25s
>
3
 添加。
产品型号: SNZB-02
电池型号: CR2450
无线协议: ZigBee (IEEE 802.15.4)
工作温度: -10-40℃
工作湿度:10-90%RH(无冷凝)
产品规格: 43x43x14mm
4
5
Operation instruction
Pull out the battery insulation sheet
eWeLink
eWeLink
1. Download APP
The device can be operated intelligently via working 
with the SONOFF ZigBee Bridge to communicate with 
other devices.
The device can work with other gateways supporting 
ZigBee 3.0 wireless protocol. Detailed information 
is in accordance with the ﬁnal product.
>
6
2. Add sub-devices
>
ZBBridge
Added:0
No child device,please add.
Add
Connect the Bridge before adding the sub-device
Access eWeLink APP, select the Bridge that you want 
to connect, and tap “Add” to add a sub-device. Then 
long press reset button on the device for 5s until the 
LED indicator ﬂashes three times, which means the 
device has entered the pairing mode, and be patient 
until pairing completes.
If the addition failed, move the sub-device closer 
to the Bridge and try again.
7
SONOFF ZigBee Bridge supports 
connecting multiple sub-devices at 
the same time.
Connecting
Keep the device close 
enough to the hub.
25s>
Power the Bridge on, access the Bridge page in the 
eWeLink APP, and tap “Add”. Then set the sub-device 
to be pair to the pairing mode, and be patient until the
pairing completes.
ZBBridge
Added:0
No child device,please add.
Add
Add Device
Looking for device
3 devices Found
8
Installation methods
1. Placed on the desktop for use.
2. Tear off the protective film of the 3M adhesive and 
 stick the device on the desired area.
Do not install on the metal surface, otherwise it 
will aﬀect the wireless communication distance.
Specifications
Model: SNZB-02
Battery model: CR2450
Working voltage: 3V
Wireless connection: ZigBee (IEEE 802.15.4)
Working temperature : -10-40℃
Working humidity: 10-90%RH (non-condensing)
Material: PC
Dimension: 43x43x14mm
9
Temperature 
and humidity 
monitoring
Product Introduction
Reset button
LED indicator
Features
Low-energy Low battery 
notification
Smart scenes 
Delete sub-devices
Long press the reset button on the sub-device for 5s 
until the LED indicator flashes three times. In this 
case, the sub-device is deleted from the Bridge 
successfully.
Users can delete sub-devices directly from the 
sub-device page on APP.
SNZB-02 is a ZigBee low-energy temperature & 
humidity sensor that can be used to monitor the 
environment temperature and humidity in real time. 
Connect it with the Bridge and you can create a smart 
scene to trigger other devices.
10
MADE IN CHINA
Shenzhen Sonoﬀ Technologies Co., Ltd.
1001, BLDG8, Lianhua Industrial Park, shenzhen, GD, 
China
ZIP code: 518000 Website: sonoﬀ.tech
FCC Statement
This equipment has been tested and found to comply with the limits for a Class B digital device,
 pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonabl...