How do I see the debug info from the FujiNet device?

You need a terminal program, like PuTTY and set the appropriate COM port to 921600. If you’re using PuTTY on windows, you need to set “Implicit CR in every LF” under Terminal.

How do I set up a development environment?

You can find this information by following this link:

https://github.com/FujiNetWIFI/fujinet-platformio/wiki/Board-bring-up-for-FujiNet-Platform.IO-code