I got a Metriful indoor air sensor, and wrote some code to expose it as JSON. It’s definitely not much:
![](https://i0.wp.com/www.asksteved.com/wp-content/uploads/2020/11/image.png?resize=439%2C242&ssl=1)
Looking again at the website, I see that 8 days ago they added what is hopefully a much better version of what I started. Yay!
EDIT: Yep, it’s way better:
![](https://i0.wp.com/www.asksteved.com/wp-content/uploads/2020/11/newplot.png?resize=700%2C450&ssl=1)
Here you can see the light levels as the sun set, followed by turning on a lamp in that room for about an hour.