Boris, purely for the record, the schema is incomplete - it mostly details pin connections rather than anything more. This DIY logger is fully green-dot compatible.
Edit: But I would just underline that this logger is called a DIY logger for a reason - it assumes that you know enough electronically about connecting the pins to do so correctly. There is, for example, no direct USB connection provided - this would have to be done via a very inexpensive add-on part. None of this is very difficult to do and the DIY logger can be a very cost-effective solution, but it is not quite plug and play in the same hardware sense that the Davis legacy loggers, or WifiLogger or Nano are. But for users with a little knowledge and wanting to connect a legacy console to a Raspberry Pi unit for example, the DIY logger can be a great solution.