Mikrotik !

For a cheap start you can choose home assistant, you just need a raspberry pi. For a more commercial solution you can look at a platform like Homey (I am using this, it is more expensive but also more of an “out of the box” experience. In all cases before you decide check if the platform you step into supports the sensors and devices you have. This will mostly be the case but there can be exceptions that make the one platform a better altetnative then the other.

I take my regular old casio on holidays, that way i do not have to worry about charging and.or flashing expensive hardware in places that is not wise.