Hey @Blacky. I have just installed this blueprint (after taking an obligatory shower to start recording derivative stat patterns). I have also seen (and imported but not yet setup) the Temp Control Exhaust Fan and Toilet Control Exhaust Fan. Do all 3 of these automations conflict with each other if you try and run them for 1 room? I currently have a NR workflow setup but it is pretty complex (and doesn’t do temp control) and it would be nice to move over to automations like the amazing work you have created in all 3 of these.
My own environment setup is an ensuite bathroom, with shower, toilet and sink. The exhaust fan was a continuous running fan that was controlled by light switch (ensuite light off and the fan would run in lower power mode, turn the light on and it would run high power mode). About a year ago I added a Shelly 2.1 into the mix and an Aqara humidity sensor. I can now control each of the high and low speed fan as and when I want rather than it running all the time which means night time no fans run anymore unless someone either uses the toilet or shower and even then, once humidity/time is down to a level I want the fans turn off.
Also, would the ‘Humidity Derivative Sensor By-pass’ be something like an automation enable/disable switch/input_boolean? The FAQ shows a question on how to set this up but no answer. I am guessing it is for overriding the automation - eg each and every automation I have in the house can be overridden with an input_boolean for the given task such as don’t turn the lights on for a given room when it is dark