Sonoff SNZB-02B AirGuard TH Lite vs Sonoff SNZB-02UL AirGuard E-Ink TH

A custom comfort range pushes a phone notification when the reading leaves the band.

A custom comfort range, one of six presets or edited by hand, pushes a phone notification when the reading leaves the band.

Zigbee 3.0 (IEEE 802.15.4) end device. SONOFF lists the ZBBridge-P, ZBBridge-U, NSPanel Pro and iHost as its own gateways, plus the Aeotec SmartThings Hub V3 and the Zigbee Echo models.

Zigbee 3.0 (IEEE 802.15.4) end device. SONOFF lists the ZBBridge-P, ZBBridge-U, Bridge-M, NSPanel Pro and iHost as its own gateways, plus the Aeotec SmartThings Hub V3 and the Zigbee Echo models. Time, date and weather on the screen need a gateway or Home Assistant.

Smart scenes trigger above or below a temperature or humidity threshold, or when the device goes offline, with a delay that avoids false alarms. The sensor is a trigger only, never an action.

Smart scenes trigger above or below a temperature or humidity threshold, or when the device goes offline, with a false alarm delay. The sensor is a trigger only, never an action.

Six months of free cloud history for temperature, humidity, dew point and VPD, with trend curves and data export.

Six hours of temperature and humidity history on the screen without a gateway, and up to six months of temperature, humidity, dew point and VPD curves in the app or Home Assistant, with CSV export.

SONOFF lists the Zigbee Echo models (Echo Plus 2nd, Echo 4th Gen, Echo Show 2nd Gen) as compatible hubs, with temperature and humidity display and threshold alerts.

SONOFF lists Alexa temperature and humidity queries, and an Echo with a built-in Zigbee hub (Echo Plus 2nd, Echo 4th, Echo Show 2nd) as a compatible gateway.

The sensor is Zigbee, not HomeKit. SONOFF reaches the Apple Home app by republishing it over Matter from its own bridges (ZBBridge-U, eWeLink CUBE).

The device is Zigbee, not HomeKit. SONOFF republishes it into the Apple Home app through its own Matter bridges (Bridge-M, ZBBridge-U, iHost, eWeLink CUBE).

SONOFF states the sensor answers Alexa and Google voice queries for temperature and humidity, through the eWeLink cloud-to-cloud link rather than a direct gateway connection.

SONOFF lists a Google Home temperature and humidity voice query, reached through the eWeLink cloud-to-cloud link.

Zigbee2MQTT documents the model and exposes temperature, humidity, dew point, VPD and battery. ZHA also works, with the script SONOFF publishes in its help center.

Zigbee2MQTT works out of the box, while ZHA needs the script SONOFF publishes in its help center for the advanced functions such as the remote sensor display and the weather data.

Not a Matter device itself: SONOFF bridges it into Matter through the ZBBridge-U and eWeLink CUBE.

Not a Matter device itself: SONOFF bridges it into Matter through the Bridge-M, ZBBridge-U, iHost or eWeLink CUBE.

SONOFF names the Aeotec SmartThings Hub V3 as a compatible Zigbee gateway, with temperature, humidity and battery level available on SmartThings.

SONOFF lists the Aeotec SmartThings Hub V3 as a compatible Zigbee gateway, with a SmartThings temperature and humidity query.

Accuracy of ±2% RH, with dew point and VPD calculated from the temperature and humidity readings.

Accuracy of plus or minus 2% RH, refreshed every 5 seconds, with dew point and VPD calculated from the temperature and humidity readings.

Swiss Sensirion sensor, accuracy of ±0.2°C (±0.4°F), refreshed every 5 seconds.

Swiss Sensirion sensor, accuracy of plus or minus 0.2 C (plus or minus 0.4 F), refreshed every 5 seconds. Screen and app resolve to 0.1 C.