as I understand it, this environment variable IDF_PATH is the connection between the .platformio framework and the PlatformIO IDE.
Unfortunately (I am working with Windows 10) I cannot see this environment variable. Nothing is set. Not even after starting Visual Studio Code with Platformio. However, the sample projects that contain framework headers work. How does the application (or the in-platform build framework) know where the corresponding framework files are located?
Thanks in advance