add device failed

[KaiWenyy]

Hi, I've installed all the packages mentioned in README.md and plugged in the dongle, but when I run python main.py -t update_app, I've encountered the error as follow. How can I solve the problem? Thanks. Kaiwen

[kiddjacky]

could you see the usb device when you do "lsusb" ? Do you have root permission? You can try adding "sudo" before the python command see if that would resolve your issues.