I understand you're looking for a RMarkdown library (likely rmarkdown), but there's no standard "rmaker.h" library as that would be a C/C++ header file, while RMarkdown is an R package.

Once the ESP32 core is installed, rmaker.h and its associated functions are available automatically when you select an ESP32 board.

Core Debug Level: Set this to Info (Tools > Core Debug Level > Info) so you can see the setup QR code in the Serial Monitor.

If rmaker.h is associated with a specific product or platform, ensure you're downloading from an authorized source to avoid any issues with authenticity or compatibility.

Installing in PlatformIO

For PlatformIO users, add the library dependency manually in platformio.ini: