I'd like to empathise that I'm a SW developer with no experinnsce with raspi and have almost no experience with HW. Nevertheless I'd like to use raspi for one project:
I'll have a temperature sensor, which would provide me information and by them, I'll be changing the behavior of the heating element. Work with the temperature sensor shouldn't be any problem, since they're made for raspi.
But my question is - is it even possible to connect it to raspi, which would be used as a power source (220V?) and to control the height of the input power (to lower/increase the temperature) at the same time? I guess I'll need to have some component between. Is there "plug'n play" solution, safe to use for an inexperienced user, which would do the work, so I can just connect it to GPIO on one side and to the heating element on the other?