With a command editor execute 'renew-certificates\certs\generate-csr.bat' file.
This file create a certs.zip file with '.cnf' and '.csr' files to send to PKI.
You will now have the '.cnf', '.ca', '.csr' and '.key' files.
When you obtains your '.cer' files, copy them into 'renew-certificates\certs' folder.
With Visual Studio Code, open project renew-certificates folder.
Open '.vscode/launch.json' file and edit arguments:
Press F5 to execute the program.
Copy your 'certs' folder into C:\pibox-update\certs' folder.
With a command editor execute 'C:\pibox-update\deploy-pibox.bat' file.
The 'settings.json' file allow you to know wich pibox is already update and a 'logs.txt' file is present in the same folder.