I have found PlatformIO to be a good step up from the Arduino IDE: it generates a new environment for each project with a sane folder structure, and it is possi

I have found PlatformIO to be a good step up from the Arduino IDE: it generates a new environment for each project with a sane folder structure, and it is possible to dive into the implementation of any function just with the usual Ctrl+click. It helped me a lot to understand how the Arduino libraries worked under the hood and to make changes in them when I needed it.