The best and easiest way is to use Arduino Library Manager. Search for WiFiManager_RTL8720, then select / install the latest version. You can also use this link  for more detailed instructions.

1. Navigate to WiFiManager_RTL8720 page.
2. Download the latest release WiFiManager_RTL8720-main.zip.
3. Extract the zip file to WiFiManager_RTL8720-main directory
4. Copy the whole

• WiFiManager_RTL8720-main folder to Arduino libraries' directory such as ~/Arduino/libraries/.

1. Install VS Code
2. Install PlatformIO
3. Install WiFiManager_RTL8720 library by using Library Manager. Search for WiFiManager_RTL8720 in Platform.io Author's Libraries
4. Use included platformio.ini file from examples to ensure that all dependent libraries will installed automatically. Please visit documentation for the other options and examples at Project Configuration File