Sonoff
Sonoff SNZB-02D Temperature & Humidity Sensor with Display
- Zigbee
Verified July 2026
The best-value climate sensor with a screen: a large glanceable LCD plus Zigbee reporting into Home Assistant via Zigbee2MQTT or ZHA, perfect for UK bedrooms and damp-prone rooms where you want a local readout as well as automations. Magnetic and wall mounts included.
In Home Assistant
| Control | Type | What it does |
|---|---|---|
| Temperature | Sensor (°C) | Room temperature reading |
| Humidity | Sensor (%) | Room humidity reading |
| Comfort thresholds | Number (x4, Zigbee2MQTT only) | Set the on-device comfort-icon min/max ranges |
| Battery | Sensor (%) | Battery level |
Zigbee2MQTT exposes the expected temperature/humidity/battery trio plus on-device comfort-zone thresholds and calibration offsets that ZHA doesn't surface at all. The catch: the sensor sleeps to save its CR2450, so any settings change (calibration, comfort range, °C/°F) silently queues until you physically press the rear button to wake it — a write made while it's asleep just doesn't land. Worth mirroring the same comfort min/max values in an HA automation so phone alerts only fire when the physical display's snowflake/fire icon is also showing it, avoiding duplicate thresholds drifting out of sync.