Windows 10/11
The CH343 USB driver installs automatically via Windows Update.
If the device does not appear, open Device Manager and check under
Ports (COM & LPT) for USB-SERIAL CH343.
macOS
A one-time driver install is required:
1. Download the CH343 driver from
WCH official site
2. Open the DMG and run the installer
3. Go to System Settings > Privacy & Security and allow the extension
4. Restart Chrome
Linux
Works out of the box. The ch341 kernel module handles CH343 devices.
If your user does not have serial port access, run:
sudo usermod -a -G dialout $USER and log out/in.