Hi all,
I ran into the same issues, and have created a new Homey App that works perfectly with my old Dyson Pure Cool and my brand new Dyson Air Purifier Hot + Cool Formaldehyde!
It supports all the sensor readings and many flow triggers and actions to react to and set for instance night mode, auto mode, heater, humidifier, continuous monitoring etc.
I’ve written it such that it detects the capabilities of the device and adds them accordingly, so the app should support most if not all device types.
I’m currently testing it extensively myself, and will then submit it to Athom for review. If and when it passes the review I’ll be looking for people to test it with other devices as I obviously am not going to buy them all 
.
Sneak preview:
I’ll let you know when I can offer a link for testing.
Cheers, Mark
