#Virtual Comm Port over USB

#Overview

Depending on its configuration, a SpringCore USB-attached device can implement the USB CDC ACM specification.

This specification allows the device to be operated as a Virtual Comm Port. Operating systems like Windows, Mac OS and Linux come with a standard driver to support the CDC ACM profile.

#Supported protocols

#Smart Reader

When byte 0 is set to 04 in register 02C0, the CDC ACM (Virtual Comm Port) profile is selected over USB, and the operating mode is Smart Reader.

Depending byte 1 in register 02A0, the protocol is either

• RDR TLV
• $SCRDR
• JSON
• RDR MK1

#SpringProx Legacy

When byte 0 is set to 01 in register 02C0, the CDC ACM (Virtual Comm Port) profile is selected over USB, and the operating mode is SpringProx Legacy.

The protocol is therefore SpringProx Legacy.

#Bitrate and parameters

Preferred settings are:

• Bitrate: either 38400bps or 115200bps
• Format: 8 data bits, 1 stop bit, no parity, no flow control