The SONOFF SNZB-02D is a Zigbee 3.0 temperature and humidity sensor with a 2.5-inch LCD and a Swiss-made temperature/humidity sensor (0.2°C and ~2%RH claimed). It offers local readout, CR2450 coin-cell power (≈2 years), OTA support and clean Home Assistant/Zigbee2MQTT integration, but users should expect coarse default reporting (min ~30‑minute interval, 0.2°C / 5% change thresholds) and occasional need to re-pair or apply firmware updates to fix reporting issues.
For smart‑home users who want a local LCD readout, Zigbee/Home Assistant integration, and long battery life; avoid if you need high‑precision humidity out of the box or very frequent updates.
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