Sonoff
Sonoff SNZB-02P Zigbee Temperature & Humidity Sensor
- Zigbee
Verified July 2026
The no-display sibling of the SNZB-02D and the cheapest accurate room sensor worth buying: ±0.2°C Swiss sensor, a CR2477 that genuinely lasts years, and first-class Zigbee2MQTT/ZHA support. Scatter one per room for heating automations — no Sonoff bridge needed despite the marketing.
In Home Assistant
| Control | Type | What it does |
|---|---|---|
| Temperature | Sensor (°C) | Room temperature reading |
| Humidity | Sensor (%) | Room humidity reading |
| Calibration | Number (x2) | Offset the temperature/humidity readings |
| Battery | Sensor (%) | Battery level |
There's no voltage sensor exposed on this model (unlike some Zigbee sensors), just temperature, humidity, battery percentage, plus writable calibration/precision config entities. Because it has no display to glance at (unlike its -02D sibling), pair it with a "sensor silence" automation that alerts if no update has arrived in over 2 hours — the only practical way to catch a dying CR2477 or a dropped rejoin before you'd otherwise notice. Post-pairing calibration edits have also been reported to fail outright on some Zigbee2MQTT versions, so verify a change actually applied.
Specs
- power
- CR2477, up to 4 years
- accuracy
- ±0.2°C / ±2% RH
- mounting
- Magnetic base or adhesive
- sensor type
- Temperature and humidity