There is no schematic for this example, it simply prints some output to the serial monitor at 115200. This is more of a build system example for untethering yourself from the Arduino IDE.

To build this example you can run the following commands.

mkdir build
cd build
cmake ..
make -j $(nproc)
make flash
# Check the serial monitor for 'Hello world!' output.
idf.py monitor -b 115200

To flash to your ESP or access the idf.py menuconfig menu from the ESP-IDF you can run the same commands with make.

make flash
make menuconfig

If Ninja is preferred:

mkdir build
cd build
cmake .. -G Nina
ninja

Dependencies

Install the ESP-IDF

# https://docs.espressif.com/projects/esp-idf/en/v5.3.2/esp32/get-started/linux-macos-setup.html#for-linux-users
sudo apt-get install -y git wget flex bison gperf python3 python3-pip python3-venv cmake ninja-build ccache libffi-dev libssl-dev dfu-util libusb-1.0-0

git clone -b v5.3.2 --recursive https://github.com/espressif/esp-idf
cd esp-idf
./install.sh
. ./export.sh

In CLion there is an official Serial Monitor plugin, or use ESP-IDF -

idf.py monitor -b 115200