FAQ

An error message tells me, that "the device or resource busy". What can I do?

This error messages means, that someone else is using that USB port.
If you are using iTU4l.pl you have configured usbserial to use this port when you plug in your device. If then itrackutil tries to access the port, it fails.

In this case you have to remove the configuration you put in place to activate usbserial.

If you only want to try out itrackutil you can temporarily remove usbserial from memory using

sudo rmmod usbserial

This command may fail, if usbserial is not loaded as a module, in which case you have to remove its configuration entirely and reboot.

If this command succeeds, start itrackutil while the GPS logger is still connected.

If you unplug the unit and reconnect it, usbserial will be reloaded.