Fix SerialConnectionError

✅ Solution

SerialConnectionError in Rust often indicates issues establishing or maintaining a serial port connection, possibly due to incorrect port names or insufficient permissions. Fix this by verifying the serial port path is correct and accessible by your user, for example /dev/ttyUSB0; you might need to add your user to the dialout group (`sudo usermod -a -G dialout $USER`) and relogin. Consider adding error handling with `Result` and handling timeouts for more robust connection management.