Install the CH343 driver

PN532Killer uses a WCH CH343 USB-to-serial interface. Modern operating systems may install the driver automatically.

Windows

1. Connect PN532Killer with a data-capable cable.
2. Open Device Manager and check Ports (COM & LPT).
3. If the device is missing or shown with a warning, download the current CH343 driver from WCH.
4. Run the installer as an administrator.
5. Reconnect the device and confirm that USB-SERIAL CH343 (COMx) appears.

Use the displayed COM number in the Windows tool, PN532 CLI, or other host application.

macOS

Recent macOS versions may expose the serial device without a separate driver. Check:

ls /dev/cu.*

If no new port appears, use the current macOS driver provided by WCH and follow its signed installer instructions. Do not disable system security merely to install an old or untrusted package.

Linux

Connect the device and inspect recent kernel messages and serial nodes:

dmesg | tail
ls /dev/ttyUSB* /dev/ttyACM* 2>/dev/null

If the port exists but your user cannot open it, add the user to the distribution's serial-port group (commonly dialout) and sign in again. Avoid permanently granting world-writable permissions to the device.