How to build PlatformIO based project

1. Install PlatformIO Core
2. Download examples source code
3. Extract ZIP archive
4. Run these commands:

# Change directory to example
> cd platformio-examples/espressif/esp32-arduino-wifiscan

# Build project
> platformio run

# Upload firmware
> platformio run --target upload

# Build specific environment
> platformio run -e quantum

# Upload firmware for the specific environment
> platformio run -e quantum --target upload

# Clean build files
> platformio run --target clean