I decided to add Air Quality to my weather setup. The ideal is a Purple Air sensor but that costs $250 and even more to ship to the UK.
The challenge I had was to add code to upload the data to my website and then get the website to use the data and display it.
After about half a day of coding, and a few tweaks in subsequent days, I ended up with the page above.
You can also see the data uploaded to the AQICN.ORG website for worldwide AQI coverage