Some users prefer the official Qinheng driver (binary-only, not recommended for security). Avoid unless desperate.
By default, Linux restricts access to dialout/serial ports to the root user and members of a specific group. To fix this, add your current user to that group: For Ubuntu / Debian / Linux Mint: sudo usermod -a -G dialout $USER Use code with caution. Copied to clipboard For Arch Linux / Fedora: sudo usermod -a -G uucp $USER Use code with caution. Copied to clipboard Important: linux ch340 driver