Best controller for HVAC control ?

[frishrash]

Hi all
I'm looking for a controller that allows controlling HVAC and showing/responding to soil moisture levels.

For HVAC, I have Arduino device capable of sending the right IR codes for my HVAC.
I'd like the controller to have an interface allowing me to power on/off, set mode (heat/cool/dehumid/...), control fan speed, target temperature, flaps, sleep mode, ionizer.

For soil moisture level, simple reading should suffice, however it should support multiple moist sensors connected to a single Arduino device.

Any suggestions for most suitable controller ? ideally with built-in user interface that supports the level of HVAC control I want out of the box

Thanks!