This repository is nothing more than Neil Kolban's U8G2 example for the ESP-IDF turned into a turnkey project.
Make sure you clone this repository with:
git clone --recursive https://github.com/JimGaluska/u8g2-esp_idf-example.git
If you don't use --recursive, then you won't automatically get the U8G2 library.
----------------------------------------------------------------------------------
Link to original example: https://github.com/nkolban/esp32-snippets.git
Link to U8G2 project: https://github.com/olikraus/u8g2
----------------------------------------------------------------------------------