Sonoff ZigBee LCD Temperature Humidity Sensor SNZB-02D

Sonoff SNZB-02D – Zigbee Temperature & Humidity Sensor with LCD

Same accurate Swiss-made sensor as the SNZB-02P, but with a large 2.5-inch LCD display on the front. Glance at it – temperature, humidity, comfort icons. No phone unlock, no app, no waiting.

The display always works (regardless of Wi-Fi), but pair it with a Sonoff Zigbee Bridge Pro and the data flows to your phone too – for remote alerts, history graphs, and automations.

Why people buy it (vs the SNZB-02P)

• You can read it without your phone. Useful in the kitchen, baby’s room, on a nightstand – places where you want a quick check without unlocking your phone.
• Comfort icons show conditions at a glance. Hot, Cold, Dry, Wet icons appear automatically when conditions cross the threshold – you don’t have to interpret the number.
• Same Swiss-made sensor as the SNZB-02P – ±0.2°C and ±2% humidity accuracy.

Key Features

• 2.5-inch LCD display – temperature, humidity, comfort icons.
• Swiss sensor – ±0.2°C temperature, ±2% humidity.
• Comfort icons – Hot / Cold / Dry / Wet badges appear when conditions are out of range.
• Phone alerts via the eWeLink app + Zigbee Bridge Pro.
• Use in smart automations – trigger a fan when humidity rises, AC when temperature climbs.
• Battery-powered (CR2477, included) – months of runtime.
• Tabletop or wall mount.
• Indoor use only (not waterproof).

💡 Pro Tip: Place this on your nightstand or in your baby’s room. You can see the room conditions instantly – without reaching for your phone in the middle of the night. The comfort icons let you know if you need to adjust the AC or open a window at a glance.

⭐ Frequently Asked Questions

Does it work without a hub?

The LCD display always works – you can read the sensor locally. But to get phone alerts, history, or use it in smart automations, you need a Sonoff Zigbee Bridge Pro (sold separately) or an NSPanel Pro.

Does it control my AC or fan?

The sensor only monitors – it doesn’t control anything directly. To turn on a fan when humidity is too high, pair this with a Sonoff smart switch (S60 plug, MINIR4, etc.) and set up an automation in eWeLink: “if humidity > 65%, turn on smart plug”.

Is the display waterproof?

No – designed for indoor use only. Don’t place in a bathroom shower zone, kitchen splash area, or outdoors.

Can I separate the sensor from the display?

No – the sensor and display are one unit. They must be placed together. If you want to monitor a remote location (water heater tank, freezer), use a different sensor – like the WTS01 waterproof probe.

The display shows Fahrenheit – how do I switch to Celsius?

Change it in the eWeLink app under device settings – there’s a temperature unit toggle. Once changed in the app, the LCD updates automatically.

What battery does it use?

CR2477 coin cell battery, included. Lasts several months under normal use.

Can I move it between locations (office → home)?

Yes – easy. Just make sure both locations use the same Wi-Fi name and password on the same Bridge, or re-pair it to the new bridge when you move.

Sonoff vs Govee sensors – which is better?

Both are great. Sonoff (Zigbee) is best if you already have the Sonoff ecosystem and want reliable, low-power sensors integrated with smart automations. Govee (Wi-Fi) is best for standalone use or if you’re building a Govee-focused setup. Both use comparable Swiss-made sensors.