Qingping Air Monitor Lite, Apple HomeKit Compatible Wi-Fi Indoor Air Quality Meter Detects Home CO2, PM2.5, PM10, Temperature, and Humidity

I've bought two of these units recently to place in my living room and bedroom. Both units required calibration for RH, and after CO2 calibration one was reading 8% higher than the other. But after adjusting the calibration offset in the app, both are giving the same readings consistently. I like that all of the sensors can be calibrated to known sources, and the CO2 sensor can be manually or automatically calibrated. You can also do firmware updates and customize just about every possible setting and configuration in the app, as well as track trends and get notifications for sensor data if you'd like. The only thing I wish could be more customized is maybe the screen saver so I could choose which data it rotates through rather than having to choose between all of the data or just one data point. Overall I am really liking this unit. It's small and easily placed just about anywhere, the app is great once you play around with it a bit, and being able to look in on your monitors when you're away from home is great. Keep up the great work Qingping!

--UPDATE: For some reason it is working again, so something was temporarily wrong, and I upped the stars. Aside from that glitch, the device is good, and gives good readings. Well reviewed by those who tested its accuracy.I bought this just 4 months ago, and it suddenly could not connect to wifi for the app to work. it may be the app or the hardware, but others have complained about this.If you cannot connect, you are prompted to update firmware, restart, restart phone. Nothing works, so it may be that the wifi on the device is faulty. It does work and gives good information. But if you want detailed graphs you need the app. I would avoid.

I like to think we're pretty savvy at my house - we have lights from 3 different manufacturers, motion sensors, air filters - all connected to their respective apps and Apple Homekit. I run parallel 2.4gHz and 5gHz wifi so everything can connecet without issue and whitelist everything that needs it.All that to say - despite 15+ resets, multiple connections, and some truly useless tech support from QingPing (how would I connect to MiHome if it isn't available in North America?? and why would I connect to the Beijing Xioami version of HomeKit??) I was never able to get it to sync more than a single time.That means while maybe (maybe) the meters work okay (not great but ...okay) without history you have no way of knowing what the levels were when you weren't home or while you slept OR while the display is off (which it does, constantly, unless plugged in).All of that to say - basically a paperweight. No thanks.

The media could not be loaded. EDIT 11 months after purchase: About 10 days ago you can see the temps slowly starting to rise. It became warm to the touch, and it seems obvious that the internal fan has failed. I've set a temp offset of -10 degrees to correct the reading, but the warmth worries me and it's not trivial to disassemble and fix according to the teardowns online. A shame - otherwise a very nice little gizmo.It's small, quiet, and seems quite accurate - comparing to Ambient Weather AQIN and Hydrofarm APCEM2 Autopilot, CO2 readings are consistent. Setup was easy (iOS and Apple Home), and it's just a delightful little gizmo, so cute! Small annoyances: No Alexa or Google Home integration (yet, I hope! QingPing, make this thing work with Alexa and it would be perfect!), and "screen saver" display is a little too much motion for something that sits on your desk, it's a little distracting. I've positioned it behind a monitor in a way so that I have to move my head a little to see it. Overall I'm very pleased with this purchase.

I purchased three of these for use in different rooms. Two of the three had visibly been opened despite being sold as new by the Qingping store. There were a couple of hairs under the protective temporary film for one of them, and two were missing the smaller of the two pieces of temporary protective film that covers the back of the unit. Two were also already configured for somebody else's wi-fi network.The idea of a multi-sensor HomeKit appliance with a big OLED display sounds so good. But the execution is flawed.1. It fails at its most important task: Providing accurate readings. The humidity reading is consistently off compared to the three other humidity meters I have. I can line them all up and the QingPing always has anomalous readings by as much as 15%. The temperature reading is off, but only by a couple of degrees. I don't know how to assess the CO2 accuracy, but I have seen it as low as 418, which is about the ambient CO2 level in all rural areas.2. The display is wasted. It has different views, but nothing that shows all readings at once. You have to cycle through manually, or configure it for automatic cycling. There's enough display density that it could have shown everything. With single readings, a boxy, thin, LCD-like font is used that makes it difficult to view at a distance despite the bright display.3. The HomeKit integration is half-baked. Enabling HomeKit mode disables all of the configuration options. For example, the display cannot be changed from Celsius to Fahrenheit. Notifications can't be enabled. The app can't even show graph results. To take advantage of the app features, the device must be reset and configured for QingPing's proprietary mode, which disables HomeKit.4. The app support is confusing. It links to two different apps in the manual, the first of which doesn't appear to link with the device in the USA. The second is flakey, routinely forgetting about registered devices, or not finding them on the network.Unfortunately, I don't know of another product that claims to have all of these sensors along with HomeKit compatibility. For now, the alternative is having at least two other devices, or going without either the CO2 or the PM2.5 and PM5 readings.

A compact device for air quality monitor that works well with AppleHome. I used it to get an idea of PM2.5 and CO2 levels at home.