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espressif_idf-extra-components/usb/usb_host_vcp/README.md

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Virtual COM Port Service

Component Registry

Virtual COM Port (VCP) service manages drivers to connected VCP devices - typically USB <-> UART converters. In practice, you rarely care about specifics of the devices; you only want uniform interface for them all.

VCP service does just that, after you register drivers for various VCP devices, you can just call VCP::open and the service will load proper driver for device that was just plugged into USB port.