The Sonoff SNZB-02DR2 pairs a 3.6" monochrome LCD display and a CR2450-powered design with a Silicon Labs Zigbee SoC and works with Zigbee2MQTT/ZHA. It's a capable, inexpensive Zigbee temperature/humidity sensor with on-device readout and magnetic mounting, but limited by no backlight and some firmware/OTA quirks — good for Home Assistant users who want a local Zigbee sensor with a display, not ideal if you need night‑visible readout or guaranteed OTA updates.
Buy if you want a local Zigbee temperature/humidity sensor with on-device LCD and easy magnetic mounting for Home Assistant; avoid if you need a backlit display or guaranteed OTA reliability.
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