19_VBUSIF.pm: physical Interface definition of VBUS, eg. LAN Adapter
19_VBUSIF.pm: physical Interface definition of VBUS, eg. LAN Adapter 21_VBUSDEV.pm: specific Interface definition, eg. Vitosolic 200View Changes
Source: 19_VBUSIF.pm: physical Interface definition of VBUS, eg. LAN Adapter (https://sourceforge.net/p/fhem/code/12093/)