(0) Build and generate initial flash data $ make $ make build/flash.data (1) preparation as root Don't run ModemManager # systemctl stop ModemManager Install USBIP host module # modprobe vhci_hcd (2) Run sample program of USBIP server $ ./sample (3) Use the USB device as root Attach the Chopstx application program (USBIP device) to USBIP host. # usbip attach -r 127.0.0.1 -b 1-1 (4) Connect CDC-ACM device $ cu -l /dev/ttyACM0 Then, you see the message from Chopstx. As you type lines, it echos. Type RET, ~ then . , you can terminate the session. (5) Detach the USBIP device as root # usbip detach -p 0