R20xcusb Software __top__ Page

The R20XC-USB is a high-performance, 13.56 MHz RFID smart card reader designed for "plug and play" use without requiring manual driver installation. It functions as a HID (Human Interface Device), meaning it emulates a standard USB keyboard to output card serial numbers directly into any text field. Quick Start Installation

Interference: Avoid placing the reader on metal surfaces, as this can block the RF signal. r20xcusb software

Problem 4: Driver installs, but COM port disappears after reboot.

• Cause: Windows Driver Signature Enforcement or power management.
• Solution: Go to Device Manager → Properties of the COM port → Power Management → Uncheck "Allow the computer to turn off this device."

• Lower buffer sizes reduce round‑trip latency but increase CPU load and risk of XRUNs (dropouts).
• On Windows, use ASIO buffer controls; on macOS, use Core Audio buffer size in DAW. Vendor control panel may also allow buffer tuning.