The core of the esp-idf is like a wrapper + a tiny bit of logic over the registers, there is a ton of extra stuff packed in there but you don't need to use it i

The core of the esp-idf is like a wrapper + a tiny bit of logic over the registers, there is a ton of extra stuff packed in there but you don't need to use it if you don't want to and it is pretty clearly separated in the source directory. I really like it because it gets out of my way when I don't want it, and when I do want it there is usually something there to help.