A very big thank you, Bouwe!
Hi Bouwe,
do you have a specific reason to use rest sensors in that resource, in stead of core air quality integration readily available in HA? (eg AirVisual Cloud )
Is this more resource more reliable?
No specific reason, other than that I started using this a long time ago. And haven’t removed it yet 
I have also been using the luchtmeetnet custom_component mentioned in an earlier post, but that one is also not perfect.
I’ll have a look on what’s available in Core nowadays, thanks!