we use python3 -m to treat the module as a script to be run in python.Note the differences and common features between the miniterm commands run by Windows, Mac or Linux users If the commands above do not work, visit the troubleshooting page. Note: Linux users must have permission to access the serial port. Python3 -m -raw -eol CR -encoding ascii /dev/ttyUSB0 115200 Python3 -m -raw -eol CR -encoding ascii /dev/cu.wchusbserial630 115200 Connecting from Linux (note unlike on other platforms, Windows python 3 is called just python) Connecting from Mac OS Python -m -raw -eol CRLF -encoding ascii COM3 115200