Of course, that goes without saying, to be clear, I'm not advocating buying random off the shelf parts from AliBaba. I recommend doing proper research and getti

Of course, that goes without saying, to be clear, I'm not advocating buying random off the shelf parts from AliBaba. I recommend doing proper research and getting certified safe parts for mains and I also agree not to play with the mains if you don't know what you're doing, it is far from a hobbyist thing and the only reason I did this is because I have a background in electrical and electronics. Having said that, you can always buy "modules" from Siemens, Honeywell, etc. Get your circuits audited by someone with more experience, in particular by an experienced electrical engineer before using it live. Have multiple levels of fail-safe, fuses, fire retardant casings, what not. Just think of every possible worse-case scenario before you do it. After all, electricity is no joke and can literally kill you.