/etc/udev/rules.d/45-stdfu-permissions.rules
, which is used when your flight controller is in DFU mode.[user@machine ~]$ ls -la /dev/ttyUSB0
crw-rw----. 1 root dialout 188, 0 Apr 3 21:16 /dev/ttyUSB0
[user@machine ~]$ sudo usermod -a -G dialout user
/dev/ttyUSB0
or /dev/ttyACM0
), and change modes on the port without resetting them. This leaves the configurator unable to connect to the flight controller, even after unplugging / replugging the USB cable. In this situation, the following command will reset the port settings to defaults: