Nice idea. Didn't realise it was possible to do automations based on values?
Oddly, you can view the humidity in HomeKit when viewing the Settings screen for a thermostat. But it doesn't look like you can do anything with it.
People at Tado, why is this not possible? This is one of the main reasons I've bought Tado. I would like to start my bathroom ventilators when humidity goes over a certain level.
People at Tado, is this a HomeKit issue or an issue in your domain?
I could be wrong, but even if you dont have any eve products....you can still use the eve app to use all of its options for scenes and trigger events......and once saved those events/tiggers will appear on the home app.
So just create a generic scene in the home app, then goto the eve app and you should be able to ADD rules to that scene to include devices and set triggers that are not even eve things.