Sonoff SNZB-02D Zigbee LCD Smart Temperature & Humidity Sensor

SNZB-02D Temperature and Humidity Sensor from Sonoff

Straight off the bat, I like this new sensor from Sonoff – epecially since it will work with my other Sonoff products like NSPANEL Pro and thanks to the eWeLink plug-in for Node-Red, my own home control setup.. but I have to ask… what is it with some manufacturers that they are still using LCDs from a bygone age.

This CR2450-powered (included) sensor-display looks lovely – it has a nice hinged case for desk mounting and a panel for wall mounting – very pleasing – but just for the sake of it, let’s compare with a cheap Zigbee LCD sensor I picke up from AliExpress recently – the most outstanding difference – aside from the AliExpress unit being a tad SMALL – is the display.

The latter has nice BLACK, CLEAR lettering at any angle – the SONOFF unit is a bit picky on viewing angles. Ok, I’ll grant you, good luck getting repeatability from AliExpress – but I have to give that Ali-sourced sensor a mention for the display alone.

Ok, now you mention it – the AliExpress unit has a smiley face, non-programmable to indicate what THEY think of as reasonable humidity – and that’s it but I DO like the solid display. Back to the new Sonoff unit… I’m going to quickly try tp pair it with my NSPANEL Pro… bear with me…

T&H Sensor from Sonoff added to NSPanel Pro.

Here we go… Sonoff NSPanel Pro – Add Device… at this point I pressed and held (for several seconds) the little button on the back of tthe new SNZB-02D sensor while the NSPanel Pro was searching. Within seconds – DONE. Added.

Hopefully over time, NSPanel Pro will be able to track temperature readings from this device – right now apart from instantaneous readings, nothing. Fair enough as I just installed it. Same with the eWeLink APP. Despite pressing the buton on the sensor, minutes after installation, still no history.

I shook the sensor to get it to change temperature slightly – and the temperature dropped from 19c to 18c, humidity from 65% to 60% no change on NSPanel Pro.. I can see slight humidity change in the APP but still no history…

SNZB-02D Sensor readings in the eWeLink APP

I guess I’ll have to be more patient – not one of my better skills.. yes you can change the name of the display and what units it uses for temperature.

Nope – I’m not following this… 2 readings in eewLink APP – taken half an hour apart.. why no history? I’ve asked Sonoff to comment.

AND – I added a thermostat to NSPanel Pro – it accepted the new temperature sensor showing the temperature you see on the right… but originally showed a humidity of 0.0%… but then as if my magic – an upgrade for NSPANEL Pro – see the video.

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5 thoughts on “Sonoff SNZB-02D Zigbee LCD Smart Temperature & Humidity Sensor

  1. Hi Pete,
    I have an Nspanel Pro with an SNZB-02D temp sensor, it pairs fine and reports data. However it is not possible to set the sensor as a thermostat, it simply does not show up in the ewelink app.
    Sonoff told me it is not possible to use it as a thermostat but in your video I can see that is possible.

    So, could you please tell me what is the way you did?
    Thanks a million,
    Janos

  2. Some of the AliExpress sensors — particularly Xiaomi Mijia and compatibles — can be reflashed with alternative firmware (see, for example, https://pvvx.github.io/ATC_MiThermometer/) that adds new features and changes existing ones, such as setting the temperature range for the “Comfort Indicator” icon.

    1. Go on – which models and with what? There are a number of sensors which I could not get to work with Zigbee2MQTT – if they can be changed – that could be a good thing. I have some iHORN sensors which won;t work with Zigbee2MQTT and I don’t have the skills to write convertors…

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