

I think you’re talking about the “data protection officer”, not “data controller”. The first one is a designated person within the company, the second one the company itself (at least for B2C software companies, usually)
But also, be aware they might not have a BPO, depending on company size they might not need one
I like the color temperature and brightness of my lights responding to the time of day too much in order to go with smart switches over smart lights