This should be an easy one- the new sonoff AirGuard TH is a desktop LCD Temperature and Humidity Sensor – decent size – showing maximum and minimum values as well as current values.
Other than that, nice but nothing outstanding – looks good – ignore that line in the right hand image above – a hair or something – certainly not there when I looked after taking the photo. Ok, so it’s a temperature and humidity sensor with a stand (erm, no time/date display – I wonder why not) but this one is ZIGBEE – so no messing around with apps. Straight into my Zigbee2MQTT setup and hence straight into Home Assistant.
I never got around to reading the manual, just instinctively holding in the little button on the back for 5 seconds to start pairing mode at which point the signal indicator appeared on the top of the display, flashing. It is now solid. So we have a battery indicator (a pair of AA alkalines were included). I wonder how this will stand up against Ikea’s new announcement that all of their new (January 2026) sensor products will purposely work with both AA/AAA batteries AND their own range of RECHARGEABLE batteries (if you don’t know, rechargeable batteries are lower voltage than the alkaline versions, i.e., 1.2V as against 1.5V, and this is normally a problem for sensors of which I’ve had many which start to fail as the voltage gets down to around 1.1-1.2 volts). If Ikea truly have cracked this, then that’s going to be a game changer to watch out for.
Not 100% sure about that red exclamation mark below Airguard TH (my name). But voltage, battery percentage, temperature and humidity are all exposed along with settings for degrees C versus degrees F etc.
I was about to get very enthusiastic. I pressed the button and detected F for Fahrenheit – that worked – but when I repeated the operation to switch back to C – it didn’t work despite several attempts… I waited 5 minutes and tried again – this time it changed back to degrees C – but this needs a little more work.
And from there, into Home Assistant… simple? Let’s see. It should be in there automatically… Yup.
It’s there.. humidity and temperature sensors along with the various configuration options – all there. It could be nice if the battery state sensor was available as well – I’ll ask Sonof while I’m asking about that C to F anomaly.
