Qingping Air Quality Monitor Gen 2, Air Quality Monitor Indoor Detects PM2.5, CO2, PM10, Noise, Temperature and Humidity, New Upgraded Alarm Clock Function, Air Quality Tester for Bedroom, Smart Home

This has the makings of a great air quality monitor.The problem is the software has bugs and the firmware update process doesn't work - so they can't ever be fixed.Also because of its bugs, it can't connect to the Internet and you can't therefore connect to the app.I could live without the app if it wasn't for the bugs.After an hour I spotted the following bugs:1) It can't connect to the Internet. Well actually it can - it does connect ok to my WiFi and my router shows the device as connected ok and fully working. But when you try and do anything Internet related it reports issues - even though the device reports its connection status as fine.1) You can't set a location for air quality updates as it can't connect to the Internet. If you search for a location such as say London, it just has a spinning circle appear and nothing ever happens.2) It can't automatically set the time and time zone for the clock because it can't connect to the Internet3) The screen auto brightness is way too dim4) Noise detection doesn't work well - showing incorrect values and taking a lot time to spot changes in noise5) You can't connect to the iOS or Android app for the device because it can't connect to the Internet6) It can't download updates to fix issues because it can't connect to the Internet. So all the issues above which could be fixed via an update can't be - because it can't connect to the Internet7) I only used it for a few hours so I suspect there's a whole load of other bugs I've not spotted and which can't be solved because it can't connect to the InternetYou can see a theme here - its inability to download via the Internet has screwed up the device.I actually have 2 other of these devices in white. They did have some issues when they arrived but were able to connect to the app and thereafter perform a firmware update - which fixed all the issues listed above.In fact they work quite well - though not without a few quirks. But at least they can be updated.I can only assume they had a slightly later version of the firmware which was working just enough to be able to do a firmware update.So if you buy one of these devices it's going to be hit and miss as to the firmware version and whether you'll ever be able to update it to fix the bugs.I may come back in a few years time and risk buying another one - in the hope by then they all have working firmwares. But as of 2025 I wouldn't recommend these devices.